astro/packages/webapi/mod.js

import { setTimeout as setTimeout$1, clearTimeout as clearTimeout$1 } from 'node:timers';
import http from 'node:http';
import https from 'node:https';
import zlib from 'node:zlib';
import Stream, { PassThrough, pipeline as pipeline$1 } from 'node:stream';
import { promisify, deprecate, types } from 'node:util';
import { format as format$1 } from 'node:url';
import { isIP } from 'node:net';
import { performance } from 'node:perf_hooks';

/** Returns the function bound to the given object. */
const __function_bind = Function.bind.bind(Function.call);
/** Returns the function called with the specified values. */
Function.call.bind(Function.call);
/** Returns whether an object has a property with the specified name. */
const __object_hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);
/** Returns a string representation of an object. */
Function.call.bind(Object.prototype.toString);
/** Returns whether the object prototype exists in another object. */
const __object_isPrototypeOf = Function.call.bind(Object.prototype.isPrototypeOf);
/** Current high resolution millisecond timestamp. */
const __performance_now = performance.now;
/** Returns the string escaped for use inside regular expressions. */
const __string_escapeRegExp = (value) => value.replace(/[\\^$*+?.()|[\]{}]/g, '\\$&');
// @ts-ignore
const INTERNALS$3 = new WeakMap();
const internalsOf = (target, className, propName) => {
    const internals = INTERNALS$3.get(target);
    if (!internals)
        throw new TypeError(`${className}.${propName} can only be used on instances of ${className}`);
    return internals;
};
const allowStringTag = (value) => value.prototype[Symbol.toStringTag] = value.name;
/** Returns any kind of path as a posix path. */
const pathToPosix = (pathname) => String(pathname == null ? '' : pathname).replace(
// convert slashes
/\\+/g, '/').replace(
// prefix a slash to drive letters
/^(?=[A-Za-z]:\/)/, '/').replace(
// encode path characters
/%/g, '%25').replace(/\n/g, '%0A').replace(/\r/g, '%0D').replace(/\t/g, '%09');

class DOMException extends Error {
    constructor(message = '', name = 'Error') {
        super(message);
        this.code = 0;
        this.name = name;
    }
}
DOMException.INDEX_SIZE_ERR = 1;
DOMException.DOMSTRING_SIZE_ERR = 2;
DOMException.HIERARCHY_REQUEST_ERR = 3;
DOMException.WRONG_DOCUMENT_ERR = 4;
DOMException.INVALID_CHARACTER_ERR = 5;
DOMException.NO_DATA_ALLOWED_ERR = 6;
DOMException.NO_MODIFICATION_ALLOWED_ERR = 7;
DOMException.NOT_FOUND_ERR = 8;
DOMException.NOT_SUPPORTED_ERR = 9;
DOMException.INUSE_ATTRIBUTE_ERR = 10;
DOMException.INVALID_STATE_ERR = 11;
DOMException.SYNTAX_ERR = 12;
DOMException.INVALID_MODIFICATION_ERR = 13;
DOMException.NAMESPACE_ERR = 14;
DOMException.INVALID_ACCESS_ERR = 15;
DOMException.VALIDATION_ERR = 16;
DOMException.TYPE_MISMATCH_ERR = 17;
DOMException.SECURITY_ERR = 18;
DOMException.NETWORK_ERR = 19;
DOMException.ABORT_ERR = 20;
DOMException.URL_MISMATCH_ERR = 21;
DOMException.QUOTA_EXCEEDED_ERR = 22;
DOMException.TIMEOUT_ERR = 23;
DOMException.INVALID_NODE_TYPE_ERR = 24;
DOMException.DATA_CLONE_ERR = 25;
allowStringTag(DOMException);

/**
 * Assert a condition.
 * @param condition The condition that it should satisfy.
 * @param message The error message.
 * @param args The arguments for replacing placeholders in the message.
 */
function assertType(condition, message, ...args) {
    if (!condition) {
        throw new TypeError(format(message, args));
    }
}
/**
 * Convert a text and arguments to one string.
 * @param message The formating text
 * @param args The arguments.
 */
function format(message, args) {
    let i = 0;
    return message.replace(/%[os]/gu, () => anyToString(args[i++]));
}
/**
 * Convert a value to a string representation.
 * @param x The value to get the string representation.
 */
function anyToString(x) {
    if (typeof x !== "object" || x === null) {
        return String(x);
    }
    return Object.prototype.toString.call(x);
}

let currentErrorHandler;
/**
 * Print a error message.
 * @param maybeError The error object.
 */
function reportError(maybeError) {
    try {
        const error = maybeError instanceof Error
            ? maybeError
            : new Error(anyToString(maybeError));
        // Call the user-defined error handler if exists.
        if (currentErrorHandler) ;
        // Dispatch an `error` event if this is on a browser.
        if (typeof dispatchEvent === "function" &&
            typeof ErrorEvent === "function") {
            dispatchEvent(new ErrorEvent("error", { error, message: error.message }));
        }
        // Emit an `uncaughtException` event if this is on Node.js.
        //istanbul ignore else
        else if (typeof process !== "undefined" &&
            typeof process.emit === "function") {
            process.emit("uncaughtException", error);
            return;
        }
        // Otherwise, print the error.
        console.error(error);
    }
    catch (_a) {
        // ignore.
    }
}

let currentWarnHandler;
/**
 * The warning information.
 */
class Warning {
    constructor(code, message) {
        this.code = code;
        this.message = message;
    }
    /**
     * Report this warning.
     * @param args The arguments of the warning.
     */
    warn(...args) {
        var _a;
        try {
            // Call the user-defined warning handler if exists.
            if (currentWarnHandler) ;
            // Otherwise, print the warning.
            const stack = ((_a = new Error().stack) !== null && _a !== void 0 ? _a : "").replace(/^(?:.+?\n){2}/gu, "\n");
            console.warn(this.message, ...args, stack);
        }
        catch (_b) {
            // Ignore.
        }
    }
}

const InitEventWasCalledWhileDispatching = new Warning("W01", "Unable to initialize event under dispatching.");
const FalsyWasAssignedToCancelBubble = new Warning("W02", "Assigning any falsy value to 'cancelBubble' property has no effect.");
const TruthyWasAssignedToReturnValue = new Warning("W03", "Assigning any truthy value to 'returnValue' property has no effect.");
const NonCancelableEventWasCanceled = new Warning("W04", "Unable to preventDefault on non-cancelable events.");
const CanceledInPassiveListener = new Warning("W05", "Unable to preventDefault inside passive event listener invocation.");
const EventListenerWasDuplicated = new Warning("W06", "An event listener wasn't added because it has been added already: %o, %o");
const OptionWasIgnored = new Warning("W07", "The %o option value was abandoned because the event listener wasn't added as duplicated.");
const InvalidEventListener = new Warning("W08", "The 'callback' argument must be a function or an object that has 'handleEvent' method: %o");
const InvalidAttributeHandler = new Warning("W09", "Event attribute handler must be a function: %o");

/*eslint-disable class-methods-use-this */
/**
 * An implementation of `Event` interface, that wraps a given event object.
 * `EventTarget` shim can control the internal state of this `Event` objects.
 * @see https://dom.spec.whatwg.org/#event
 */
class Event {
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-none
     */
    static get NONE() {
        return NONE;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-capturing_phase
     */
    static get CAPTURING_PHASE() {
        return CAPTURING_PHASE;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-at_target
     */
    static get AT_TARGET() {
        return AT_TARGET;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-bubbling_phase
     */
    static get BUBBLING_PHASE() {
        return BUBBLING_PHASE;
    }
    /**
     * Initialize this event instance.
     * @param type The type of this event.
     * @param eventInitDict Options to initialize.
     * @see https://dom.spec.whatwg.org/#dom-event-event
     */
    constructor(type, eventInitDict) {
        Object.defineProperty(this, "isTrusted", {
            value: false,
            enumerable: true,
        });
        const opts = eventInitDict !== null && eventInitDict !== void 0 ? eventInitDict : {};
        internalDataMap.set(this, {
            type: String(type),
            bubbles: Boolean(opts.bubbles),
            cancelable: Boolean(opts.cancelable),
            composed: Boolean(opts.composed),
            target: null,
            currentTarget: null,
            stopPropagationFlag: false,
            stopImmediatePropagationFlag: false,
            canceledFlag: false,
            inPassiveListenerFlag: false,
            dispatchFlag: false,
            timeStamp: Date.now(),
        });
    }
    /**
     * The type of this event.
     * @see https://dom.spec.whatwg.org/#dom-event-type
     */
    get type() {
        return $(this).type;
    }
    /**
     * The event target of the current dispatching.
     * @see https://dom.spec.whatwg.org/#dom-event-target
     */
    get target() {
        return $(this).target;
    }
    /**
     * The event target of the current dispatching.
     * @deprecated Use the `target` property instead.
     * @see https://dom.spec.whatwg.org/#dom-event-srcelement
     */
    get srcElement() {
        return $(this).target;
    }
    /**
     * The event target of the current dispatching.
     * @see https://dom.spec.whatwg.org/#dom-event-currenttarget
     */
    get currentTarget() {
        return $(this).currentTarget;
    }
    /**
     * The event target of the current dispatching.
     * This doesn't support node tree.
     * @see https://dom.spec.whatwg.org/#dom-event-composedpath
     */
    composedPath() {
        const currentTarget = $(this).currentTarget;
        if (currentTarget) {
            return [currentTarget];
        }
        return [];
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-none
     */
    get NONE() {
        return NONE;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-capturing_phase
     */
    get CAPTURING_PHASE() {
        return CAPTURING_PHASE;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-at_target
     */
    get AT_TARGET() {
        return AT_TARGET;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-bubbling_phase
     */
    get BUBBLING_PHASE() {
        return BUBBLING_PHASE;
    }
    /**
     * The current event phase.
     * @see https://dom.spec.whatwg.org/#dom-event-eventphase
     */
    get eventPhase() {
        return $(this).dispatchFlag ? 2 : 0;
    }
    /**
     * Stop event bubbling.
     * Because this shim doesn't support node tree, this merely changes the `cancelBubble` property value.
     * @see https://dom.spec.whatwg.org/#dom-event-stoppropagation
     */
    stopPropagation() {
        $(this).stopPropagationFlag = true;
    }
    /**
     * `true` if event bubbling was stopped.
     * @deprecated
     * @see https://dom.spec.whatwg.org/#dom-event-cancelbubble
     */
    get cancelBubble() {
        return $(this).stopPropagationFlag;
    }
    /**
     * Stop event bubbling if `true` is set.
     * @deprecated Use the `stopPropagation()` method instead.
     * @see https://dom.spec.whatwg.org/#dom-event-cancelbubble
     */
    set cancelBubble(value) {
        if (value) {
            $(this).stopPropagationFlag = true;
        }
        else {
            FalsyWasAssignedToCancelBubble.warn();
        }
    }
    /**
     * Stop event bubbling and subsequent event listener callings.
     * @see https://dom.spec.whatwg.org/#dom-event-stopimmediatepropagation
     */
    stopImmediatePropagation() {
        const data = $(this);
        data.stopPropagationFlag = data.stopImmediatePropagationFlag = true;
    }
    /**
     * `true` if this event will bubble.
     * @see https://dom.spec.whatwg.org/#dom-event-bubbles
     */
    get bubbles() {
        return $(this).bubbles;
    }
    /**
     * `true` if this event can be canceled by the `preventDefault()` method.
     * @see https://dom.spec.whatwg.org/#dom-event-cancelable
     */
    get cancelable() {
        return $(this).cancelable;
    }
    /**
     * `true` if the default behavior will act.
     * @deprecated Use the `defaultPrevented` proeprty instead.
     * @see https://dom.spec.whatwg.org/#dom-event-returnvalue
     */
    get returnValue() {
        return !$(this).canceledFlag;
    }
    /**
     * Cancel the default behavior if `false` is set.
     * @deprecated Use the `preventDefault()` method instead.
     * @see https://dom.spec.whatwg.org/#dom-event-returnvalue
     */
    set returnValue(value) {
        if (!value) {
            setCancelFlag($(this));
        }
        else {
            TruthyWasAssignedToReturnValue.warn();
        }
    }
    /**
     * Cancel the default behavior.
     * @see https://dom.spec.whatwg.org/#dom-event-preventdefault
     */
    preventDefault() {
        setCancelFlag($(this));
    }
    /**
     * `true` if the default behavior was canceled.
     * @see https://dom.spec.whatwg.org/#dom-event-defaultprevented
     */
    get defaultPrevented() {
        return $(this).canceledFlag;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-composed
     */
    get composed() {
        return $(this).composed;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-istrusted
     */
    //istanbul ignore next
    get isTrusted() {
        return false;
    }
    /**
     * @see https://dom.spec.whatwg.org/#dom-event-timestamp
     */
    get timeStamp() {
        return $(this).timeStamp;
    }
    /**
     * @deprecated Don't use this method. The constructor did initialization.
     */
    initEvent(type, bubbles = false, cancelable = false) {
        const data = $(this);
        if (data.dispatchFlag) {
            InitEventWasCalledWhileDispatching.warn();
            return;
        }
        internalDataMap.set(this, {
            ...data,
            type: String(type),
            bubbles: Boolean(bubbles),
            cancelable: Boolean(cancelable),
            target: null,
            currentTarget: null,
            stopPropagationFlag: false,
            stopImmediatePropagationFlag: false,
            canceledFlag: false,
        });
    }
}
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const NONE = 0;
const CAPTURING_PHASE = 1;
const AT_TARGET = 2;
const BUBBLING_PHASE = 3;
/**
 * Private data for event wrappers.
 */
const internalDataMap = new WeakMap();
/**
 * Get private data.
 * @param event The event object to get private data.
 * @param name The variable name to report.
 * @returns The private data of the event.
 */
function $(event, name = "this") {
    const retv = internalDataMap.get(event);
    assertType(retv != null, "'%s' must be an object that Event constructor created, but got another one: %o", name, event);
    return retv;
}
/**
 * https://dom.spec.whatwg.org/#set-the-canceled-flag
 * @param data private data.
 */
function setCancelFlag(data) {
    if (data.inPassiveListenerFlag) {
        CanceledInPassiveListener.warn();
        return;
    }
    if (!data.cancelable) {
        NonCancelableEventWasCanceled.warn();
        return;
    }
    data.canceledFlag = true;
}
// Set enumerable
Object.defineProperty(Event, "NONE", { enumerable: true });
Object.defineProperty(Event, "CAPTURING_PHASE", { enumerable: true });
Object.defineProperty(Event, "AT_TARGET", { enumerable: true });
Object.defineProperty(Event, "BUBBLING_PHASE", { enumerable: true });
const keys$1 = Object.getOwnPropertyNames(Event.prototype);
for (let i = 0; i < keys$1.length; ++i) {
    if (keys$1[i] === "constructor") {
        continue;
    }
    Object.defineProperty(Event.prototype, keys$1[i], { enumerable: true });
}

/**
 * An implementation of `Event` interface, that wraps a given event object.
 * This class controls the internal state of `Event`.
 * @see https://dom.spec.whatwg.org/#interface-event
 */
class EventWrapper extends Event {
    /**
     * Wrap a given event object to control states.
     * @param event The event-like object to wrap.
     */
    static wrap(event) {
        return new (getWrapperClassOf(event))(event);
    }
    constructor(event) {
        super(event.type, {
            bubbles: event.bubbles,
            cancelable: event.cancelable,
            composed: event.composed,
        });
        if (event.cancelBubble) {
            super.stopPropagation();
        }
        if (event.defaultPrevented) {
            super.preventDefault();
        }
        internalDataMap$1.set(this, { original: event });
        // Define accessors
        const keys = Object.keys(event);
        for (let i = 0; i < keys.length; ++i) {
            const key = keys[i];
            if (!(key in this)) {
                Object.defineProperty(this, key, defineRedirectDescriptor(event, key));
            }
        }
    }
    stopPropagation() {
        super.stopPropagation();
        const { original } = $$1(this);
        if ("stopPropagation" in original) {
            original.stopPropagation();
        }
    }
    get cancelBubble() {
        return super.cancelBubble;
    }
    set cancelBubble(value) {
        super.cancelBubble = value;
        const { original } = $$1(this);
        if ("cancelBubble" in original) {
            original.cancelBubble = value;
        }
    }
    stopImmediatePropagation() {
        super.stopImmediatePropagation();
        const { original } = $$1(this);
        if ("stopImmediatePropagation" in original) {
            original.stopImmediatePropagation();
        }
    }
    get returnValue() {
        return super.returnValue;
    }
    set returnValue(value) {
        super.returnValue = value;
        const { original } = $$1(this);
        if ("returnValue" in original) {
            original.returnValue = value;
        }
    }
    preventDefault() {
        super.preventDefault();
        const { original } = $$1(this);
        if ("preventDefault" in original) {
            original.preventDefault();
        }
    }
    get timeStamp() {
        const { original } = $$1(this);
        if ("timeStamp" in original) {
            return original.timeStamp;
        }
        return super.timeStamp;
    }
}
/**
 * Private data for event wrappers.
 */
const internalDataMap$1 = new WeakMap();
/**
 * Get private data.
 * @param event The event object to get private data.
 * @returns The private data of the event.
 */
function $$1(event) {
    const retv = internalDataMap$1.get(event);
    assertType(retv != null, "'this' is expected an Event object, but got", event);
    return retv;
}
/**
 * Cache for wrapper classes.
 * @type {WeakMap<Object, Function>}
 * @private
 */
const wrapperClassCache = new WeakMap();
// Make association for wrappers.
wrapperClassCache.set(Object.prototype, EventWrapper);
/**
 * Get the wrapper class of a given prototype.
 * @param originalEvent The event object to wrap.
 */
function getWrapperClassOf(originalEvent) {
    const prototype = Object.getPrototypeOf(originalEvent);
    if (prototype == null) {
        return EventWrapper;
    }
    let wrapper = wrapperClassCache.get(prototype);
    if (wrapper == null) {
        wrapper = defineWrapper(getWrapperClassOf(prototype), prototype);
        wrapperClassCache.set(prototype, wrapper);
    }
    return wrapper;
}
/**
 * Define new wrapper class.
 * @param BaseEventWrapper The base wrapper class.
 * @param originalPrototype The prototype of the original event.
 */
function defineWrapper(BaseEventWrapper, originalPrototype) {
    class CustomEventWrapper extends BaseEventWrapper {
    }
    const keys = Object.keys(originalPrototype);
    for (let i = 0; i < keys.length; ++i) {
        Object.defineProperty(CustomEventWrapper.prototype, keys[i], defineRedirectDescriptor(originalPrototype, keys[i]));
    }
    return CustomEventWrapper;
}
/**
 * Get the property descriptor to redirect a given property.
 */
function defineRedirectDescriptor(obj, key) {
    const d = Object.getOwnPropertyDescriptor(obj, key);
    return {
        get() {
            const original = $$1(this).original;
            const value = original[key];
            if (typeof value === "function") {
                return value.bind(original);
            }
            return value;
        },
        set(value) {
            const original = $$1(this).original;
            original[key] = value;
        },
        configurable: d.configurable,
        enumerable: d.enumerable,
    };
}

/**
 * Create a new listener.
 * @param callback The callback function.
 * @param capture The capture flag.
 * @param passive The passive flag.
 * @param once The once flag.
 * @param signal The abort signal.
 * @param signalListener The abort event listener for the abort signal.
 */
function createListener(callback, capture, passive, once, signal, signalListener) {
    return {
        callback,
        flags: (capture ? 1 /* Capture */ : 0) |
            (passive ? 2 /* Passive */ : 0) |
            (once ? 4 /* Once */ : 0),
        signal,
        signalListener,
    };
}
/**
 * Set the `removed` flag to the given listener.
 * @param listener The listener to check.
 */
function setRemoved(listener) {
    listener.flags |= 8 /* Removed */;
}
/**
 * Check if the given listener has the `capture` flag or not.
 * @param listener The listener to check.
 */
function isCapture(listener) {
    return (listener.flags & 1 /* Capture */) === 1 /* Capture */;
}
/**
 * Check if the given listener has the `passive` flag or not.
 * @param listener The listener to check.
 */
function isPassive(listener) {
    return (listener.flags & 2 /* Passive */) === 2 /* Passive */;
}
/**
 * Check if the given listener has the `once` flag or not.
 * @param listener The listener to check.
 */
function isOnce(listener) {
    return (listener.flags & 4 /* Once */) === 4 /* Once */;
}
/**
 * Check if the given listener has the `removed` flag or not.
 * @param listener The listener to check.
 */
function isRemoved(listener) {
    return (listener.flags & 8 /* Removed */) === 8 /* Removed */;
}
/**
 * Call an event listener.
 * @param listener The listener to call.
 * @param target The event target object for `thisArg`.
 * @param event The event object for the first argument.
 * @param attribute `true` if this callback is an event attribute handler.
 */
function invokeCallback({ callback }, target, event) {
    try {
        if (typeof callback === "function") {
            callback.call(target, event);
        }
        else if (typeof callback.handleEvent === "function") {
            callback.handleEvent(event);
        }
    }
    catch (thrownError) {
        reportError(thrownError);
    }
}

/**
 * Find the index of given listener.
 * This returns `-1` if not found.
 * @param list The listener list.
 * @param callback The callback function to find.
 * @param capture The capture flag to find.
 */
function findIndexOfListener({ listeners }, callback, capture) {
    for (let i = 0; i < listeners.length; ++i) {
        if (listeners[i].callback === callback &&
            isCapture(listeners[i]) === capture) {
            return i;
        }
    }
    return -1;
}
/**
 * Add the given listener.
 * Does copy-on-write if needed.
 * @param list The listener list.
 * @param callback The callback function.
 * @param capture The capture flag.
 * @param passive The passive flag.
 * @param once The once flag.
 * @param signal The abort signal.
 */
function addListener(list, callback, capture, passive, once, signal) {
    let signalListener;
    if (signal) {
        signalListener = removeListener.bind(null, list, callback, capture);
        signal.addEventListener("abort", signalListener);
    }
    const listener = createListener(callback, capture, passive, once, signal, signalListener);
    if (list.cow) {
        list.cow = false;
        list.listeners = [...list.listeners, listener];
    }
    else {
        list.listeners.push(listener);
    }
    return listener;
}
/**
 * Remove a listener.
 * @param list The listener list.
 * @param callback The callback function to find.
 * @param capture The capture flag to find.
 * @returns `true` if it mutated the list directly.
 */
function removeListener(list, callback, capture) {
    const index = findIndexOfListener(list, callback, capture);
    if (index !== -1) {
        return removeListenerAt(list, index);
    }
    return false;
}
/**
 * Remove a listener.
 * @param list The listener list.
 * @param index The index of the target listener.
 * @param disableCow Disable copy-on-write if true.
 * @returns `true` if it mutated the `listeners` array directly.
 */
function removeListenerAt(list, index, disableCow = false) {
    const listener = list.listeners[index];
    // Set the removed flag.
    setRemoved(listener);
    // Dispose the abort signal listener if exists.
    if (listener.signal) {
        listener.signal.removeEventListener("abort", listener.signalListener);
    }
    // Remove it from the array.
    if (list.cow && !disableCow) {
        list.cow = false;
        list.listeners = list.listeners.filter((_, i) => i !== index);
        return false;
    }
    list.listeners.splice(index, 1);
    return true;
}

/**
 * Create a new `ListenerListMap` object.
 */
function createListenerListMap() {
    return Object.create(null);
}
/**
 * Get the listener list of the given type.
 * If the listener list has not been initialized, initialize and return it.
 * @param listenerMap The listener list map.
 * @param type The event type to get.
 */
function ensureListenerList(listenerMap, type) {
    var _a;
    return ((_a = listenerMap[type]) !== null && _a !== void 0 ? _a : (listenerMap[type] = {
        attrCallback: undefined,
        attrListener: undefined,
        cow: false,
        listeners: [],
    }));
}

/**
 * An implementation of the `EventTarget` interface.
 * @see https://dom.spec.whatwg.org/#eventtarget
 */
class EventTarget {
    /**
     * Initialize this instance.
     */
    constructor() {
        internalDataMap$2.set(this, createListenerListMap());
    }
    // Implementation
    addEventListener(type0, callback0, options0) {
        const listenerMap = $$2(this);
        const { callback, capture, once, passive, signal, type, } = normalizeAddOptions(type0, callback0, options0);
        if (callback == null || (signal === null || signal === void 0 ? void 0 : signal.aborted)) {
            return;
        }
        const list = ensureListenerList(listenerMap, type);
        // Find existing listener.
        const i = findIndexOfListener(list, callback, capture);
        if (i !== -1) {
            warnDuplicate(list.listeners[i], passive, once, signal);
            return;
        }
        // Add the new listener.
        addListener(list, callback, capture, passive, once, signal);
    }
    // Implementation
    removeEventListener(type0, callback0, options0) {
        const listenerMap = $$2(this);
        const { callback, capture, type } = normalizeOptions(type0, callback0, options0);
        const list = listenerMap[type];
        if (callback != null && list) {
            removeListener(list, callback, capture);
        }
    }
    // Implementation
    dispatchEvent(e) {
        const list = $$2(this)[String(e.type)];
        if (list == null) {
            return true;
        }
        const event = e instanceof Event ? e : EventWrapper.wrap(e);
        const eventData = $(event, "event");
        if (eventData.dispatchFlag) {
           throw new DOMException("This event has been in dispatching.");
        }
        eventData.dispatchFlag = true;
        eventData.target = eventData.currentTarget = this;
        if (!eventData.stopPropagationFlag) {
            const { cow, listeners } = list;
            // Set copy-on-write flag.
            list.cow = true;
            // Call listeners.
            for (let i = 0; i < listeners.length; ++i) {
                const listener = listeners[i];
                // Skip if removed.
                if (isRemoved(listener)) {
                    continue;
                }
                // Remove this listener if has the `once` flag.
                if (isOnce(listener) && removeListenerAt(list, i, !cow)) {
                    // Because this listener was removed, the next index is the
                    // same as the current value.
                    i -= 1;
                }
                // Call this listener with the `passive` flag.
                eventData.inPassiveListenerFlag = isPassive(listener);
                invokeCallback(listener, this, event);
                eventData.inPassiveListenerFlag = false;
                // Stop if the `event.stopImmediatePropagation()` method was called.
                if (eventData.stopImmediatePropagationFlag) {
                    break;
                }
            }
            // Restore copy-on-write flag.
            if (!cow) {
                list.cow = false;
            }
        }
        eventData.target = null;
        eventData.currentTarget = null;
        eventData.stopImmediatePropagationFlag = false;
        eventData.stopPropagationFlag = false;
        eventData.dispatchFlag = false;
        return !eventData.canceledFlag;
    }
}
/**
 * Internal data.
 */
const internalDataMap$2 = new WeakMap();
/**
 * Get private data.
 * @param target The event target object to get private data.
 * @param name The variable name to report.
 * @returns The private data of the event.
 */
function $$2(target, name = "this") {
    const retv = internalDataMap$2.get(target);
    assertType(retv != null, "'%s' must be an object that EventTarget constructor created, but got another one: %o", name, target);
    return retv;
}
/**
 * Normalize options.
 * @param options The options to normalize.
 */
function normalizeAddOptions(type, callback, options) {
    var _a;
    assertCallback(callback);
    if (typeof options === "object" && options !== null) {
        return {
            type: String(type),
            callback: callback !== null && callback !== void 0 ? callback : undefined,
            capture: Boolean(options.capture),
            passive: Boolean(options.passive),
            once: Boolean(options.once),
            signal: (_a = options.signal) !== null && _a !== void 0 ? _a : undefined,
        };
    }
    return {
        type: String(type),
        callback: callback !== null && callback !== void 0 ? callback : undefined,
        capture: Boolean(options),
        passive: false,
        once: false,
        signal: undefined,
    };
}
/**
 * Normalize options.
 * @param options The options to normalize.
 */
function normalizeOptions(type, callback, options) {
    assertCallback(callback);
    if (typeof options === "object" && options !== null) {
        return {
            type: String(type),
            callback: callback !== null && callback !== void 0 ? callback : undefined,
            capture: Boolean(options.capture),
        };
    }
    return {
        type: String(type),
        callback: callback !== null && callback !== void 0 ? callback : undefined,
        capture: Boolean(options),
    };
}
/**
 * Assert the type of 'callback' argument.
 * @param callback The callback to check.
 */
function assertCallback(callback) {
    if (typeof callback === "function" ||
        (typeof callback === "object" &&
            callback !== null &&
            typeof callback.handleEvent === "function")) {
        return;
    }
    if (callback == null || typeof callback === "object") {
        InvalidEventListener.warn(callback);
        return;
    }
    throw new TypeError(format(InvalidEventListener.message, [callback]));
}
/**
 * Print warning for duplicated.
 * @param listener The current listener that is duplicated.
 * @param passive The passive flag of the new duplicated listener.
 * @param once The once flag of the new duplicated listener.
 * @param signal The signal object of the new duplicated listener.
 */
function warnDuplicate(listener, passive, once, signal) {
    EventListenerWasDuplicated.warn(isCapture(listener) ? "capture" : "bubble", listener.callback);
    if (isPassive(listener) !== passive) {
        OptionWasIgnored.warn("passive");
    }
    if (isOnce(listener) !== once) {
        OptionWasIgnored.warn("once");
    }
    if (listener.signal !== signal) {
        OptionWasIgnored.warn("signal");
    }
}
// Set enumerable
const keys$1$1 = Object.getOwnPropertyNames(EventTarget.prototype);
for (let i = 0; i < keys$1$1.length; ++i) {
    if (keys$1$1[i] === "constructor") {
        continue;
    }
    Object.defineProperty(EventTarget.prototype, keys$1$1[i], { enumerable: true });
}
// Ensure `eventTarget instanceof window.EventTarget` is `true`.

/**
 * Get the current value of a given event attribute.
 * @param target The `EventTarget` object to get.
 * @param type The event type.
 */
function getEventAttributeValue(target, type) {
    var _a, _b;
    const listMap = $$2(target, "target");
    return (_b = (_a = listMap[type]) === null || _a === void 0 ? void 0 : _a.attrCallback) !== null && _b !== void 0 ? _b : null;
}
/**
 * Set an event listener to a given event attribute.
 * @param target The `EventTarget` object to set.
 * @param type The event type.
 * @param callback The event listener.
 */
function setEventAttributeValue(target, type, callback) {
    if (callback != null && typeof callback !== "function") {
        InvalidAttributeHandler.warn(callback);
    }
    if (typeof callback === "function" ||
        (typeof callback === "object" && callback !== null)) {
        upsertEventAttributeListener(target, type, callback);
    }
    else {
        removeEventAttributeListener(target, type);
    }
}
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
 * Update or insert the given event attribute handler.
 * @param target The `EventTarget` object to set.
 * @param type The event type.
 * @param callback The event listener.
 */
function upsertEventAttributeListener(target, type, callback) {
    const list = ensureListenerList($$2(target, "target"), String(type));
    list.attrCallback = callback;
    if (list.attrListener == null) {
        list.attrListener = addListener(list, defineEventAttributeCallback(list), false, false, false, undefined);
    }
}
/**
 * Remove the given event attribute handler.
 * @param target The `EventTarget` object to remove.
 * @param type The event type.
 * @param callback The event listener.
 */
function removeEventAttributeListener(target, type) {
    const listMap = $$2(target, "target");
    const list = listMap[String(type)];
    if (list && list.attrListener) {
        removeListener(list, list.attrListener.callback, false);
        list.attrCallback = list.attrListener = undefined;
    }
}
/**
 * Define the callback function for the given listener list object.
 * It calls `attrCallback` property if the property value is a function.
 * @param list The `ListenerList` object.
 */
function defineEventAttributeCallback(list) {
    return function (event) {
        const callback = list.attrCallback;
        if (typeof callback === "function") {
            callback.call(this, event);
        }
    };
}
/**
 * Define an event attribute.
 * @param target The `EventTarget` object to define an event attribute.
 * @param type The event type to define.
 * @param _eventClass Unused, but to infer `Event` class type.
 * @deprecated Use `getEventAttributeValue`/`setEventAttributeValue` pair on your derived class instead because of static analysis friendly.
 */
function defineEventAttribute(target, type, _eventClass) {
    Object.defineProperty(target, `on${type}`, {
        get() {
            return getEventAttributeValue(this, type);
        },
        set(value) {
            setEventAttributeValue(this, type, value);
        },
        configurable: true,
        enumerable: true,
    });
}

/**
 * @author Toru Nagashima <https://github.com/mysticatea>
 * See LICENSE file in root directory for full license.
 */

/**
 * The signal class.
 * @see https://dom.spec.whatwg.org/#abortsignal
 */
class AbortSignal extends EventTarget {
    /**
     * AbortSignal cannot be constructed directly.
     */
    constructor() {
        super();
        throw new TypeError("AbortSignal cannot be constructed directly");
    }
    /**
     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.
     */
    get aborted() {
        const aborted = abortedFlags.get(this);
        if (typeof aborted !== "boolean") {
            throw new TypeError(`Expected 'this' to be an 'AbortSignal' object, but got ${this === null ? "null" : typeof this}`);
        }
        return aborted;
    }
}
defineEventAttribute(AbortSignal.prototype, "abort");
/**
 * Create an AbortSignal object.
 */
function createAbortSignal() {
    const signal = Object.create(AbortSignal.prototype);
    EventTarget.call(signal);
    abortedFlags.set(signal, false);
    return signal;
}
/**
 * Abort a given signal.
 */
function abortSignal(signal) {
    if (abortedFlags.get(signal) !== false) {
        return;
    }
    abortedFlags.set(signal, true);
    signal.dispatchEvent({ type: "abort" });
}
/**
 * Aborted flag for each instances.
 */
const abortedFlags = new WeakMap();
// Properties should be enumerable.
Object.defineProperties(AbortSignal.prototype, {
    aborted: { enumerable: true },
});
// `toString()` should return `"[object AbortSignal]"`
if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {
        configurable: true,
        value: "AbortSignal",
    });
}

/**
 * The AbortController.
 * @see https://dom.spec.whatwg.org/#abortcontroller
 */
class AbortController {
    /**
     * Initialize this controller.
     */
    constructor() {
        signals.set(this, createAbortSignal());
    }
    /**
     * Returns the `AbortSignal` object associated with this object.
     */
    get signal() {
        return getSignal(this);
    }
    /**
     * Abort and signal to any observers that the associated activity is to be aborted.
     */
    abort() {
        abortSignal(getSignal(this));
    }
}
/**
 * Associated signals.
 */
const signals = new WeakMap();
/**
 * Get the associated signal of a given controller.
 */
function getSignal(controller) {
    const signal = signals.get(controller);
    if (signal == null) {
        throw new TypeError(`Expected 'this' to be an 'AbortController' object, but got ${controller === null ? "null" : typeof controller}`);
    }
    return signal;
}
// Properties should be enumerable.
Object.defineProperties(AbortController.prototype, {
    signal: { enumerable: true },
    abort: { enumerable: true },
});
if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {
        configurable: true,
        value: "AbortController",
    });
}

const INTERNAL$2 = { tick: 0, pool: new Map };
function requestAnimationFrame(callback) {
    if (!INTERNAL$2.pool.size) {
        setTimeout$1(() => {
            const next = __performance_now();
            for (const func of INTERNAL$2.pool.values()) {
                func(next);
            }
            INTERNAL$2.pool.clear();
        }, 1000 / 16);
    }
    const func = __function_bind(callback, undefined);
    const tick = ++INTERNAL$2.tick;
    INTERNAL$2.pool.set(tick, func);
    return tick;
}
function cancelAnimationFrame(requestId) {
    const timeout = INTERNAL$2.pool.get(requestId);
    if (timeout) {
        clearTimeout$1(timeout);
        INTERNAL$2.pool.delete(requestId);
    }
}

function atob(data) {
    return Buffer.from(data, 'base64').toString('binary');
}
function btoa(data) {
    return Buffer.from(data, 'binary').toString('base64');
}

class Node extends EventTarget {
    append(...nodesOrDOMStrings) {
    }
    appendChild(childNode) {
        return childNode;
    }
    after(...nodesOrDOMStrings) {
    }
    before(...nodesOrDOMStrings) {
    }
    prepend(...nodesOrDOMStrings) {
    }
    replaceChild(newChild, oldChild) {
        return oldChild;
    }
    removeChild(childNode) {
        return childNode;
    }
    get attributes() {
        return {};
    }
    get childNodes() {
        return [];
    }
    get children() {
        return [];
    }
    get ownerDocument() {
        return null;
    }
    get nodeValue() {
        return '';
    }
    set nodeValue(value) {
    }
    get textContent() {
        return '';
    }
    set textContent(value) {
    }
    get previousElementSibling() {
        return null;
    }
    get nextElementSibling() {
        return null;
    }
    [Symbol.for('nodejs.util.inspect.custom')](depth, options) {
        return `${this.constructor.name}`;
    }
}
class DocumentFragment extends Node {
}
class ShadowRoot extends DocumentFragment {
    get innerHTML() {
        return '';
    }
    set innerHTML(value) {
    }
}
const NodeFilter$1 = Object.assign({
    NodeFilter() {
        throw new TypeError('Illegal constructor');
    }
}.NodeFilter, {
    FILTER_ACCEPT: 1,
    FILTER_REJECT: 2,
    FILTER_SKIP: 3,
    SHOW_ALL: 4294967295,
    SHOW_ELEMENT: 1,
    SHOW_ATTRIBUTE: 2,
    SHOW_TEXT: 4,
    SHOW_CDATA_SECTION: 8,
    SHOW_ENTITY_REFERENCE: 16,
    SHOW_ENTITY: 32,
    SHOW_PROCESSING_INSTRUCTION: 64,
    SHOW_COMMENT: 128,
    SHOW_DOCUMENT: 256,
    SHOW_DOCUMENT_TYPE: 512,
    SHOW_DOCUMENT_FRAGMENT: 1024,
    SHOW_NOTATION: 2048,
});
class NodeIterator$1 {
    nextNode() {
        return null;
    }
    previousNode() {
        return null;
    }
    get filter() {
        const internals = internalsOf(this, 'NodeIterator', 'filter');
        return internals.filter;
    }
    get pointerBeforeReferenceNode() {
        const internals = internalsOf(this, 'NodeIterator', 'pointerBeforeReferenceNode');
        return internals.pointerBeforeReferenceNode;
    }
    get referenceNode() {
        const internals = internalsOf(this, 'NodeIterator', 'referenceNode');
        return internals.referenceNode;
    }
    get root() {
        const internals = internalsOf(this, 'NodeIterator', 'root');
        return internals.root;
    }
    get whatToShow() {
        const internals = internalsOf(this, 'NodeIterator', 'whatToShow');
        return internals.whatToShow;
    }
}
allowStringTag(Node);
allowStringTag(NodeIterator$1);
allowStringTag(DocumentFragment);
allowStringTag(ShadowRoot);

class CharacterData extends Node {
    constructor(data) {
        INTERNALS$3.set(super(), {
            data: String(data),
        });
    }
    get data() {
        return internalsOf(this, 'CharacterData', 'data').data;
    }
    get textContent() {
        return internalsOf(this, 'CharacterData', 'textContent').data;
    }
}
class Comment extends CharacterData {
}
class Text extends CharacterData {
    get assignedSlot() {
        return null;
    }
    get wholeText() {
        return internalsOf(this, 'CharacterData', 'textContent').data;
    }
}
allowStringTag(CharacterData);
allowStringTag(Text);
allowStringTag(Comment);

/**
 * web-streams-polyfill v3.2.0
 */
/// <reference lib="es2015.symbol" />
const SymbolPolyfill = Symbol;

/// <reference lib="dom" />
function noop$1() {
    return undefined;
}

function typeIsObject(x) {
    return (typeof x === 'object' && x !== null) || typeof x === 'function';
}
const rethrowAssertionErrorRejection = noop$1;

const originalPromise = Promise;
const originalPromiseThen = Promise.prototype.then;
const originalPromiseResolve = Promise.resolve.bind(originalPromise);
const originalPromiseReject = Promise.reject.bind(originalPromise);
function newPromise(executor) {
    return new originalPromise(executor);
}
function promiseResolvedWith(value) {
    return originalPromiseResolve(value);
}
function promiseRejectedWith(reason) {
    return originalPromiseReject(reason);
}
function PerformPromiseThen(promise, onFulfilled, onRejected) {
    // There doesn't appear to be any way to correctly emulate the behaviour from JavaScript, so this is just an
    // approximation.
    return originalPromiseThen.call(promise, onFulfilled, onRejected);
}
function uponPromise(promise, onFulfilled, onRejected) {
    PerformPromiseThen(PerformPromiseThen(promise, onFulfilled, onRejected), undefined, rethrowAssertionErrorRejection);
}
function uponFulfillment(promise, onFulfilled) {
    uponPromise(promise, onFulfilled);
}
function uponRejection(promise, onRejected) {
    uponPromise(promise, undefined, onRejected);
}
function transformPromiseWith(promise, fulfillmentHandler, rejectionHandler) {
    return PerformPromiseThen(promise, fulfillmentHandler, rejectionHandler);
}
function setPromiseIsHandledToTrue(promise) {
    PerformPromiseThen(promise, undefined, rethrowAssertionErrorRejection);
}
function reflectCall(F, V, args) {
    if (typeof F !== 'function') {
        throw new TypeError('Argument is not a function');
    }
    return Function.prototype.apply.call(F, V, args);
}
function promiseCall(F, V, args) {
    try {
        return promiseResolvedWith(reflectCall(F, V, args));
    }
    catch (value) {
        return promiseRejectedWith(value);
    }
}

// Original from Chromium
// https://chromium.googlesource.com/chromium/src/+/0aee4434a4dba42a42abaea9bfbc0cd196a63bc1/third_party/blink/renderer/core/streams/SimpleQueue.js
const QUEUE_MAX_ARRAY_SIZE = 16384;
/**
 * Simple queue structure.
 *
 * Avoids scalability issues with using a packed array directly by using
 * multiple arrays in a linked list and keeping the array size bounded.
 */
class SimpleQueue {
    constructor() {
        this._cursor = 0;
        this._size = 0;
        // _front and _back are always defined.
        this._front = {
            _elements: [],
            _next: undefined
        };
        this._back = this._front;
        // The cursor is used to avoid calling Array.shift().
        // It contains the index of the front element of the array inside the
        // front-most node. It is always in the range [0, QUEUE_MAX_ARRAY_SIZE).
        this._cursor = 0;
        // When there is only one node, size === elements.length - cursor.
        this._size = 0;
    }
    get length() {
        return this._size;
    }
    // For exception safety, this method is structured in order:
    // 1. Read state
    // 2. Calculate required state mutations
    // 3. Perform state mutations
    push(element) {
        const oldBack = this._back;
        let newBack = oldBack;
        if (oldBack._elements.length === QUEUE_MAX_ARRAY_SIZE - 1) {
            newBack = {
                _elements: [],
                _next: undefined
            };
        }
        // push() is the mutation most likely to throw an exception, so it
        // goes first.
        oldBack._elements.push(element);
        if (newBack !== oldBack) {
            this._back = newBack;
            oldBack._next = newBack;
        }
        ++this._size;
    }
    // Like push(), shift() follows the read -> calculate -> mutate pattern for
    // exception safety.
    shift() { // must not be called on an empty queue
        const oldFront = this._front;
        let newFront = oldFront;
        const oldCursor = this._cursor;
        let newCursor = oldCursor + 1;
        const elements = oldFront._elements;
        const element = elements[oldCursor];
        if (newCursor === QUEUE_MAX_ARRAY_SIZE) {
            newFront = oldFront._next;
            newCursor = 0;
        }
        // No mutations before this point.
        --this._size;
        this._cursor = newCursor;
        if (oldFront !== newFront) {
            this._front = newFront;
        }
        // Permit shifted element to be garbage collected.
        elements[oldCursor] = undefined;
        return element;
    }
    // The tricky thing about forEach() is that it can be called
    // re-entrantly. The queue may be mutated inside the callback. It is easy to
    // see that push() within the callback has no negative effects since the end
    // of the queue is checked for on every iteration. If shift() is called
    // repeatedly within the callback then the next iteration may return an
    // element that has been removed. In this case the callback will be called
    // with undefined values until we either "catch up" with elements that still
    // exist or reach the back of the queue.
    forEach(callback) {
        let i = this._cursor;
        let node = this._front;
        let elements = node._elements;
        while (i !== elements.length || node._next !== undefined) {
            if (i === elements.length) {
                node = node._next;
                elements = node._elements;
                i = 0;
                if (elements.length === 0) {
                    break;
                }
            }
            callback(elements[i]);
            ++i;
        }
    }
    // Return the element that would be returned if shift() was called now,
    // without modifying the queue.
    peek() { // must not be called on an empty queue
        const front = this._front;
        const cursor = this._cursor;
        return front._elements[cursor];
    }
}

function ReadableStreamReaderGenericInitialize(reader, stream) {
    reader._ownerReadableStream = stream;
    stream._reader = reader;
    if (stream._state === 'readable') {
        defaultReaderClosedPromiseInitialize(reader);
    }
    else if (stream._state === 'closed') {
        defaultReaderClosedPromiseInitializeAsResolved(reader);
    }
    else {
        defaultReaderClosedPromiseInitializeAsRejected(reader, stream._storedError);
    }
}
// A client of ReadableStreamDefaultReader and ReadableStreamBYOBReader may use these functions directly to bypass state
// check.
function ReadableStreamReaderGenericCancel(reader, reason) {
    const stream = reader._ownerReadableStream;
    return ReadableStreamCancel(stream, reason);
}
function ReadableStreamReaderGenericRelease(reader) {
    if (reader._ownerReadableStream._state === 'readable') {
        defaultReaderClosedPromiseReject(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));
    }
    else {
        defaultReaderClosedPromiseResetToRejected(reader, new TypeError(`Reader was released and can no longer be used to monitor the stream's closedness`));
    }
    reader._ownerReadableStream._reader = undefined;
    reader._ownerReadableStream = undefined;
}
// Helper functions for the readers.
function readerLockException(name) {
    return new TypeError('Cannot ' + name + ' a stream using a released reader');
}
// Helper functions for the ReadableStreamDefaultReader.
function defaultReaderClosedPromiseInitialize(reader) {
    reader._closedPromise = newPromise((resolve, reject) => {
        reader._closedPromise_resolve = resolve;
        reader._closedPromise_reject = reject;
    });
}
function defaultReaderClosedPromiseInitializeAsRejected(reader, reason) {
    defaultReaderClosedPromiseInitialize(reader);
    defaultReaderClosedPromiseReject(reader, reason);
}
function defaultReaderClosedPromiseInitializeAsResolved(reader) {
    defaultReaderClosedPromiseInitialize(reader);
    defaultReaderClosedPromiseResolve(reader);
}
function defaultReaderClosedPromiseReject(reader, reason) {
    if (reader._closedPromise_reject === undefined) {
        return;
    }
    setPromiseIsHandledToTrue(reader._closedPromise);
    reader._closedPromise_reject(reason);
    reader._closedPromise_resolve = undefined;
    reader._closedPromise_reject = undefined;
}
function defaultReaderClosedPromiseResetToRejected(reader, reason) {
    defaultReaderClosedPromiseInitializeAsRejected(reader, reason);
}
function defaultReaderClosedPromiseResolve(reader) {
    if (reader._closedPromise_resolve === undefined) {
        return;
    }
    reader._closedPromise_resolve(undefined);
    reader._closedPromise_resolve = undefined;
    reader._closedPromise_reject = undefined;
}

const AbortSteps = SymbolPolyfill('[[AbortSteps]]');
const ErrorSteps = SymbolPolyfill('[[ErrorSteps]]');
const CancelSteps = SymbolPolyfill('[[CancelSteps]]');
const PullSteps = SymbolPolyfill('[[PullSteps]]');

/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite#Polyfill
const NumberIsFinite = Number.isFinite || function (x) {
    return typeof x === 'number' && isFinite(x);
};

/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/trunc#Polyfill
const MathTrunc = Math.trunc || function (v) {
    return v < 0 ? Math.ceil(v) : Math.floor(v);
};

// https://heycam.github.io/webidl/#idl-dictionaries
function isDictionary(x) {
    return typeof x === 'object' || typeof x === 'function';
}
function assertDictionary(obj, context) {
    if (obj !== undefined && !isDictionary(obj)) {
        throw new TypeError(`${context} is not an object.`);
    }
}
// https://heycam.github.io/webidl/#idl-callback-functions
function assertFunction(x, context) {
    if (typeof x !== 'function') {
        throw new TypeError(`${context} is not a function.`);
    }
}
// https://heycam.github.io/webidl/#idl-object
function isObject(x) {
    return (typeof x === 'object' && x !== null) || typeof x === 'function';
}
function assertObject(x, context) {
    if (!isObject(x)) {
        throw new TypeError(`${context} is not an object.`);
    }
}
function assertRequiredArgument(x, position, context) {
    if (x === undefined) {
        throw new TypeError(`Parameter ${position} is required in '${context}'.`);
    }
}
function assertRequiredField(x, field, context) {
    if (x === undefined) {
        throw new TypeError(`${field} is required in '${context}'.`);
    }
}
// https://heycam.github.io/webidl/#idl-unrestricted-double
function convertUnrestrictedDouble(value) {
    return Number(value);
}
function censorNegativeZero(x) {
    return x === 0 ? 0 : x;
}
function integerPart(x) {
    return censorNegativeZero(MathTrunc(x));
}
// https://heycam.github.io/webidl/#idl-unsigned-long-long
function convertUnsignedLongLongWithEnforceRange(value, context) {
    const lowerBound = 0;
    const upperBound = Number.MAX_SAFE_INTEGER;
    let x = Number(value);
    x = censorNegativeZero(x);
    if (!NumberIsFinite(x)) {
        throw new TypeError(`${context} is not a finite number`);
    }
    x = integerPart(x);
    if (x < lowerBound || x > upperBound) {
        throw new TypeError(`${context} is outside the accepted range of ${lowerBound} to ${upperBound}, inclusive`);
    }
    if (!NumberIsFinite(x) || x === 0) {
        return 0;
    }
    // TODO Use BigInt if supported?
    // let xBigInt = BigInt(integerPart(x));
    // xBigInt = BigInt.asUintN(64, xBigInt);
    // return Number(xBigInt);
    return x;
}

function assertReadableStream(x, context) {
    if (!IsReadableStream(x)) {
        throw new TypeError(`${context} is not a ReadableStream.`);
    }
}

// Abstract operations for the ReadableStream.
function AcquireReadableStreamDefaultReader(stream) {
    return new ReadableStreamDefaultReader(stream);
}
// ReadableStream API exposed for controllers.
function ReadableStreamAddReadRequest(stream, readRequest) {
    stream._reader._readRequests.push(readRequest);
}
function ReadableStreamFulfillReadRequest(stream, chunk, done) {
    const reader = stream._reader;
    const readRequest = reader._readRequests.shift();
    if (done) {
        readRequest._closeSteps();
    }
    else {
        readRequest._chunkSteps(chunk);
    }
}
function ReadableStreamGetNumReadRequests(stream) {
    return stream._reader._readRequests.length;
}
function ReadableStreamHasDefaultReader(stream) {
    const reader = stream._reader;
    if (reader === undefined) {
        return false;
    }
    if (!IsReadableStreamDefaultReader(reader)) {
        return false;
    }
    return true;
}
/**
 * A default reader vended by a {@link ReadableStream}.
 *
 * @public
 */
class ReadableStreamDefaultReader {
    constructor(stream) {
        assertRequiredArgument(stream, 1, 'ReadableStreamDefaultReader');
        assertReadableStream(stream, 'First parameter');
        if (IsReadableStreamLocked(stream)) {
            throw new TypeError('This stream has already been locked for exclusive reading by another reader');
        }
        ReadableStreamReaderGenericInitialize(this, stream);
        this._readRequests = new SimpleQueue();
    }
    /**
     * Returns a promise that will be fulfilled when the stream becomes closed,
     * or rejected if the stream ever errors or the reader's lock is released before the stream finishes closing.
     */
    get closed() {
        if (!IsReadableStreamDefaultReader(this)) {
            return promiseRejectedWith(defaultReaderBrandCheckException('closed'));
        }
        return this._closedPromise;
    }
    /**
     * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.
     */
    cancel(reason = undefined) {
        if (!IsReadableStreamDefaultReader(this)) {
            return promiseRejectedWith(defaultReaderBrandCheckException('cancel'));
        }
        if (this._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('cancel'));
        }
        return ReadableStreamReaderGenericCancel(this, reason);
    }
    /**
     * Returns a promise that allows access to the next chunk from the stream's internal queue, if available.
     *
     * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.
     */
    read() {
        if (!IsReadableStreamDefaultReader(this)) {
            return promiseRejectedWith(defaultReaderBrandCheckException('read'));
        }
        if (this._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('read from'));
        }
        let resolvePromise;
        let rejectPromise;
        const promise = newPromise((resolve, reject) => {
            resolvePromise = resolve;
            rejectPromise = reject;
        });
        const readRequest = {
            _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),
            _closeSteps: () => resolvePromise({ value: undefined, done: true }),
            _errorSteps: e => rejectPromise(e)
        };
        ReadableStreamDefaultReaderRead(this, readRequest);
        return promise;
    }
    /**
     * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.
     * If the associated stream is errored when the lock is released, the reader will appear errored in the same way
     * from now on; otherwise, the reader will appear closed.
     *
     * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by
     * the reader's {@link ReadableStreamDefaultReader.read | read()} method has not yet been settled. Attempting to
     * do so will throw a `TypeError` and leave the reader locked to the stream.
     */
    releaseLock() {
        if (!IsReadableStreamDefaultReader(this)) {
            throw defaultReaderBrandCheckException('releaseLock');
        }
        if (this._ownerReadableStream === undefined) {
            return;
        }
        if (this._readRequests.length > 0) {
            throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');
        }
        ReadableStreamReaderGenericRelease(this);
    }
}
Object.defineProperties(ReadableStreamDefaultReader.prototype, {
    cancel: { enumerable: true },
    read: { enumerable: true },
    releaseLock: { enumerable: true },
    closed: { enumerable: true }
});
// Abstract operations for the readers.
function IsReadableStreamDefaultReader(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_readRequests')) {
        return false;
    }
    return x instanceof ReadableStreamDefaultReader;
}
function ReadableStreamDefaultReaderRead(reader, readRequest) {
    const stream = reader._ownerReadableStream;
    stream._disturbed = true;
    if (stream._state === 'closed') {
        readRequest._closeSteps();
    }
    else if (stream._state === 'errored') {
        readRequest._errorSteps(stream._storedError);
    }
    else {
        stream._readableStreamController[PullSteps](readRequest);
    }
}
// Helper functions for the ReadableStreamDefaultReader.
function defaultReaderBrandCheckException(name) {
    return new TypeError(`ReadableStreamDefaultReader.prototype.${name} can only be used on a ReadableStreamDefaultReader`);
}

/// <reference lib="es2018.asynciterable" />
class ReadableStreamAsyncIteratorImpl {
    constructor(reader, preventCancel) {
        this._ongoingPromise = undefined;
        this._isFinished = false;
        this._reader = reader;
        this._preventCancel = preventCancel;
    }
    next() {
        const nextSteps = () => this._nextSteps();
        this._ongoingPromise = this._ongoingPromise ?
            transformPromiseWith(this._ongoingPromise, nextSteps, nextSteps) :
            nextSteps();
        return this._ongoingPromise;
    }
    return(value) {
        const returnSteps = () => this._returnSteps(value);
        return this._ongoingPromise ?
            transformPromiseWith(this._ongoingPromise, returnSteps, returnSteps) :
            returnSteps();
    }
    _nextSteps() {
        if (this._isFinished) {
            return Promise.resolve({ value: undefined, done: true });
        }
        const reader = this._reader;
        if (reader._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('iterate'));
        }
        let resolvePromise;
        let rejectPromise;
        const promise = newPromise((resolve, reject) => {
            resolvePromise = resolve;
            rejectPromise = reject;
        });
        const readRequest = {
            _chunkSteps: chunk => {
                this._ongoingPromise = undefined;
                // This needs to be delayed by one microtask, otherwise we stop pulling too early which breaks a test.
                // FIXME Is this a bug in the specification, or in the test?
                queueMicrotask(() => resolvePromise({ value: chunk, done: false }));
            },
            _closeSteps: () => {
                this._ongoingPromise = undefined;
                this._isFinished = true;
                ReadableStreamReaderGenericRelease(reader);
                resolvePromise({ value: undefined, done: true });
            },
            _errorSteps: reason => {
                this._ongoingPromise = undefined;
                this._isFinished = true;
                ReadableStreamReaderGenericRelease(reader);
                rejectPromise(reason);
            }
        };
        ReadableStreamDefaultReaderRead(reader, readRequest);
        return promise;
    }
    _returnSteps(value) {
        if (this._isFinished) {
            return Promise.resolve({ value, done: true });
        }
        this._isFinished = true;
        const reader = this._reader;
        if (reader._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('finish iterating'));
        }
        if (!this._preventCancel) {
            const result = ReadableStreamReaderGenericCancel(reader, value);
            ReadableStreamReaderGenericRelease(reader);
            return transformPromiseWith(result, () => ({ value, done: true }));
        }
        ReadableStreamReaderGenericRelease(reader);
        return promiseResolvedWith({ value, done: true });
    }
}
const ReadableStreamAsyncIteratorPrototype = {
    next() {
        if (!IsReadableStreamAsyncIterator(this)) {
            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('next'));
        }
        return this._asyncIteratorImpl.next();
    },
    return(value) {
        if (!IsReadableStreamAsyncIterator(this)) {
            return promiseRejectedWith(streamAsyncIteratorBrandCheckException('return'));
        }
        return this._asyncIteratorImpl.return(value);
    }
};
// Abstract operations for the ReadableStream.
function AcquireReadableStreamAsyncIterator(stream, preventCancel) {
    const reader = AcquireReadableStreamDefaultReader(stream);
    const impl = new ReadableStreamAsyncIteratorImpl(reader, preventCancel);
    const iterator = Object.create(ReadableStreamAsyncIteratorPrototype);
    iterator._asyncIteratorImpl = impl;
    return iterator;
}
function IsReadableStreamAsyncIterator(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_asyncIteratorImpl')) {
        return false;
    }
    try {
        // noinspection SuspiciousTypeOfGuard
        return x._asyncIteratorImpl instanceof
            ReadableStreamAsyncIteratorImpl;
    }
    catch (_a) {
        return false;
    }
}
// Helper functions for the ReadableStream.
function streamAsyncIteratorBrandCheckException(name) {
    return new TypeError(`ReadableStreamAsyncIterator.${name} can only be used on a ReadableSteamAsyncIterator`);
}

/// <reference lib="es2015.core" />
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN#Polyfill
const NumberIsNaN = Number.isNaN || function (x) {
    // eslint-disable-next-line no-self-compare
    return x !== x;
};

function CreateArrayFromList(elements) {
    // We use arrays to represent lists, so this is basically a no-op.
    // Do a slice though just in case we happen to depend on the unique-ness.
    return elements.slice();
}
function CopyDataBlockBytes(dest, destOffset, src, srcOffset, n) {
    new Uint8Array(dest).set(new Uint8Array(src, srcOffset, n), destOffset);
}
// Not implemented correctly
function TransferArrayBuffer(O) {
    return O;
}
// Not implemented correctly
// eslint-disable-next-line @typescript-eslint/no-unused-vars
function IsDetachedBuffer(O) {
    return false;
}
function ArrayBufferSlice(buffer, begin, end) {
    // ArrayBuffer.prototype.slice is not available on IE10
    // https://www.caniuse.com/mdn-javascript_builtins_arraybuffer_slice
    if (buffer.slice) {
        return buffer.slice(begin, end);
    }
    const length = end - begin;
    const slice = new ArrayBuffer(length);
    CopyDataBlockBytes(slice, 0, buffer, begin, length);
    return slice;
}

function IsNonNegativeNumber(v) {
    if (typeof v !== 'number') {
        return false;
    }
    if (NumberIsNaN(v)) {
        return false;
    }
    if (v < 0) {
        return false;
    }
    return true;
}
function CloneAsUint8Array(O) {
    const buffer = ArrayBufferSlice(O.buffer, O.byteOffset, O.byteOffset + O.byteLength);
    return new Uint8Array(buffer);
}

function DequeueValue(container) {
    const pair = container._queue.shift();
    container._queueTotalSize -= pair.size;
    if (container._queueTotalSize < 0) {
        container._queueTotalSize = 0;
    }
    return pair.value;
}
function EnqueueValueWithSize(container, value, size) {
    if (!IsNonNegativeNumber(size) || size === Infinity) {
        throw new RangeError('Size must be a finite, non-NaN, non-negative number.');
    }
    container._queue.push({ value, size });
    container._queueTotalSize += size;
}
function PeekQueueValue(container) {
    const pair = container._queue.peek();
    return pair.value;
}
function ResetQueue(container) {
    container._queue = new SimpleQueue();
    container._queueTotalSize = 0;
}

/**
 * A pull-into request in a {@link ReadableByteStreamController}.
 *
 * @public
 */
class ReadableStreamBYOBRequest {
    constructor() {
        throw new TypeError('Illegal constructor');
    }
    /**
     * Returns the view for writing in to, or `null` if the BYOB request has already been responded to.
     */
    get view() {
        if (!IsReadableStreamBYOBRequest(this)) {
            throw byobRequestBrandCheckException('view');
        }
        return this._view;
    }
    respond(bytesWritten) {
        if (!IsReadableStreamBYOBRequest(this)) {
            throw byobRequestBrandCheckException('respond');
        }
        assertRequiredArgument(bytesWritten, 1, 'respond');
        bytesWritten = convertUnsignedLongLongWithEnforceRange(bytesWritten, 'First parameter');
        if (this._associatedReadableByteStreamController === undefined) {
            throw new TypeError('This BYOB request has been invalidated');
        }
        if (IsDetachedBuffer(this._view.buffer)) ;
        ReadableByteStreamControllerRespond(this._associatedReadableByteStreamController, bytesWritten);
    }
    respondWithNewView(view) {
        if (!IsReadableStreamBYOBRequest(this)) {
            throw byobRequestBrandCheckException('respondWithNewView');
        }
        assertRequiredArgument(view, 1, 'respondWithNewView');
        if (!ArrayBuffer.isView(view)) {
            throw new TypeError('You can only respond with array buffer views');
        }
        if (this._associatedReadableByteStreamController === undefined) {
            throw new TypeError('This BYOB request has been invalidated');
        }
        if (IsDetachedBuffer(view.buffer)) ;
        ReadableByteStreamControllerRespondWithNewView(this._associatedReadableByteStreamController, view);
    }
}
Object.defineProperties(ReadableStreamBYOBRequest.prototype, {
    respond: { enumerable: true },
    respondWithNewView: { enumerable: true },
    view: { enumerable: true }
});
/**
 * Allows control of a {@link ReadableStream | readable byte stream}'s state and internal queue.
 *
 * @public
 */
class ReadableByteStreamController {
    constructor() {
        throw new TypeError('Illegal constructor');
    }
    /**
     * Returns the current BYOB pull request, or `null` if there isn't one.
     */
    get byobRequest() {
        if (!IsReadableByteStreamController(this)) {
            throw byteStreamControllerBrandCheckException('byobRequest');
        }
        return ReadableByteStreamControllerGetBYOBRequest(this);
    }
    /**
     * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is
     * over-full. An underlying byte source ought to use this information to determine when and how to apply backpressure.
     */
    get desiredSize() {
        if (!IsReadableByteStreamController(this)) {
            throw byteStreamControllerBrandCheckException('desiredSize');
        }
        return ReadableByteStreamControllerGetDesiredSize(this);
    }
    /**
     * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from
     * the stream, but once those are read, the stream will become closed.
     */
    close() {
        if (!IsReadableByteStreamController(this)) {
            throw byteStreamControllerBrandCheckException('close');
        }
        if (this._closeRequested) {
            throw new TypeError('The stream has already been closed; do not close it again!');
        }
        const state = this._controlledReadableByteStream._state;
        if (state !== 'readable') {
            throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be closed`);
        }
        ReadableByteStreamControllerClose(this);
    }
    enqueue(chunk) {
        if (!IsReadableByteStreamController(this)) {
            throw byteStreamControllerBrandCheckException('enqueue');
        }
        assertRequiredArgument(chunk, 1, 'enqueue');
        if (!ArrayBuffer.isView(chunk)) {
            throw new TypeError('chunk must be an array buffer view');
        }
        if (chunk.byteLength === 0) {
            throw new TypeError('chunk must have non-zero byteLength');
        }
        if (chunk.buffer.byteLength === 0) {
            throw new TypeError(`chunk's buffer must have non-zero byteLength`);
        }
        if (this._closeRequested) {
            throw new TypeError('stream is closed or draining');
        }
        const state = this._controlledReadableByteStream._state;
        if (state !== 'readable') {
            throw new TypeError(`The stream (in ${state} state) is not in the readable state and cannot be enqueued to`);
        }
        ReadableByteStreamControllerEnqueue(this, chunk);
    }
    /**
     * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.
     */
    error(e = undefined) {
        if (!IsReadableByteStreamController(this)) {
            throw byteStreamControllerBrandCheckException('error');
        }
        ReadableByteStreamControllerError(this, e);
    }
    /** @internal */
    [CancelSteps](reason) {
        ReadableByteStreamControllerClearPendingPullIntos(this);
        ResetQueue(this);
        const result = this._cancelAlgorithm(reason);
        ReadableByteStreamControllerClearAlgorithms(this);
        return result;
    }
    /** @internal */
    [PullSteps](readRequest) {
        const stream = this._controlledReadableByteStream;
        if (this._queueTotalSize > 0) {
            const entry = this._queue.shift();
            this._queueTotalSize -= entry.byteLength;
            ReadableByteStreamControllerHandleQueueDrain(this);
            const view = new Uint8Array(entry.buffer, entry.byteOffset, entry.byteLength);
            readRequest._chunkSteps(view);
            return;
        }
        const autoAllocateChunkSize = this._autoAllocateChunkSize;
        if (autoAllocateChunkSize !== undefined) {
            let buffer;
            try {
                buffer = new ArrayBuffer(autoAllocateChunkSize);
            }
            catch (bufferE) {
                readRequest._errorSteps(bufferE);
                return;
            }
            const pullIntoDescriptor = {
                buffer,
                bufferByteLength: autoAllocateChunkSize,
                byteOffset: 0,
                byteLength: autoAllocateChunkSize,
                bytesFilled: 0,
                elementSize: 1,
                viewConstructor: Uint8Array,
                readerType: 'default'
            };
            this._pendingPullIntos.push(pullIntoDescriptor);
        }
        ReadableStreamAddReadRequest(stream, readRequest);
        ReadableByteStreamControllerCallPullIfNeeded(this);
    }
}
Object.defineProperties(ReadableByteStreamController.prototype, {
    close: { enumerable: true },
    enqueue: { enumerable: true },
    error: { enumerable: true },
    byobRequest: { enumerable: true },
    desiredSize: { enumerable: true }
});
// Abstract operations for the ReadableByteStreamController.
function IsReadableByteStreamController(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableByteStream')) {
        return false;
    }
    return x instanceof ReadableByteStreamController;
}
function IsReadableStreamBYOBRequest(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_associatedReadableByteStreamController')) {
        return false;
    }
    return x instanceof ReadableStreamBYOBRequest;
}
function ReadableByteStreamControllerCallPullIfNeeded(controller) {
    const shouldPull = ReadableByteStreamControllerShouldCallPull(controller);
    if (!shouldPull) {
        return;
    }
    if (controller._pulling) {
        controller._pullAgain = true;
        return;
    }
    controller._pulling = true;
    // TODO: Test controller argument
    const pullPromise = controller._pullAlgorithm();
    uponPromise(pullPromise, () => {
        controller._pulling = false;
        if (controller._pullAgain) {
            controller._pullAgain = false;
            ReadableByteStreamControllerCallPullIfNeeded(controller);
        }
    }, e => {
        ReadableByteStreamControllerError(controller, e);
    });
}
function ReadableByteStreamControllerClearPendingPullIntos(controller) {
    ReadableByteStreamControllerInvalidateBYOBRequest(controller);
    controller._pendingPullIntos = new SimpleQueue();
}
function ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor) {
    let done = false;
    if (stream._state === 'closed') {
        done = true;
    }
    const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);
    if (pullIntoDescriptor.readerType === 'default') {
        ReadableStreamFulfillReadRequest(stream, filledView, done);
    }
    else {
        ReadableStreamFulfillReadIntoRequest(stream, filledView, done);
    }
}
function ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor) {
    const bytesFilled = pullIntoDescriptor.bytesFilled;
    const elementSize = pullIntoDescriptor.elementSize;
    return new pullIntoDescriptor.viewConstructor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, bytesFilled / elementSize);
}
function ReadableByteStreamControllerEnqueueChunkToQueue(controller, buffer, byteOffset, byteLength) {
    controller._queue.push({ buffer, byteOffset, byteLength });
    controller._queueTotalSize += byteLength;
}
function ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) {
    const elementSize = pullIntoDescriptor.elementSize;
    const currentAlignedBytes = pullIntoDescriptor.bytesFilled - pullIntoDescriptor.bytesFilled % elementSize;
    const maxBytesToCopy = Math.min(controller._queueTotalSize, pullIntoDescriptor.byteLength - pullIntoDescriptor.bytesFilled);
    const maxBytesFilled = pullIntoDescriptor.bytesFilled + maxBytesToCopy;
    const maxAlignedBytes = maxBytesFilled - maxBytesFilled % elementSize;
    let totalBytesToCopyRemaining = maxBytesToCopy;
    let ready = false;
    if (maxAlignedBytes > currentAlignedBytes) {
        totalBytesToCopyRemaining = maxAlignedBytes - pullIntoDescriptor.bytesFilled;
        ready = true;
    }
    const queue = controller._queue;
    while (totalBytesToCopyRemaining > 0) {
        const headOfQueue = queue.peek();
        const bytesToCopy = Math.min(totalBytesToCopyRemaining, headOfQueue.byteLength);
        const destStart = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;
        CopyDataBlockBytes(pullIntoDescriptor.buffer, destStart, headOfQueue.buffer, headOfQueue.byteOffset, bytesToCopy);
        if (headOfQueue.byteLength === bytesToCopy) {
            queue.shift();
        }
        else {
            headOfQueue.byteOffset += bytesToCopy;
            headOfQueue.byteLength -= bytesToCopy;
        }
        controller._queueTotalSize -= bytesToCopy;
        ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesToCopy, pullIntoDescriptor);
        totalBytesToCopyRemaining -= bytesToCopy;
    }
    return ready;
}
function ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, size, pullIntoDescriptor) {
    pullIntoDescriptor.bytesFilled += size;
}
function ReadableByteStreamControllerHandleQueueDrain(controller) {
    if (controller._queueTotalSize === 0 && controller._closeRequested) {
        ReadableByteStreamControllerClearAlgorithms(controller);
        ReadableStreamClose(controller._controlledReadableByteStream);
    }
    else {
        ReadableByteStreamControllerCallPullIfNeeded(controller);
    }
}
function ReadableByteStreamControllerInvalidateBYOBRequest(controller) {
    if (controller._byobRequest === null) {
        return;
    }
    controller._byobRequest._associatedReadableByteStreamController = undefined;
    controller._byobRequest._view = null;
    controller._byobRequest = null;
}
function ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller) {
    while (controller._pendingPullIntos.length > 0) {
        if (controller._queueTotalSize === 0) {
            return;
        }
        const pullIntoDescriptor = controller._pendingPullIntos.peek();
        if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {
            ReadableByteStreamControllerShiftPendingPullInto(controller);
            ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);
        }
    }
}
function ReadableByteStreamControllerPullInto(controller, view, readIntoRequest) {
    const stream = controller._controlledReadableByteStream;
    let elementSize = 1;
    if (view.constructor !== DataView) {
        elementSize = view.constructor.BYTES_PER_ELEMENT;
    }
    const ctor = view.constructor;
    // try {
    const buffer = TransferArrayBuffer(view.buffer);
    // } catch (e) {
    //   readIntoRequest._errorSteps(e);
    //   return;
    // }
    const pullIntoDescriptor = {
        buffer,
        bufferByteLength: buffer.byteLength,
        byteOffset: view.byteOffset,
        byteLength: view.byteLength,
        bytesFilled: 0,
        elementSize,
        viewConstructor: ctor,
        readerType: 'byob'
    };
    if (controller._pendingPullIntos.length > 0) {
        controller._pendingPullIntos.push(pullIntoDescriptor);
        // No ReadableByteStreamControllerCallPullIfNeeded() call since:
        // - No change happens on desiredSize
        // - The source has already been notified of that there's at least 1 pending read(view)
        ReadableStreamAddReadIntoRequest(stream, readIntoRequest);
        return;
    }
    if (stream._state === 'closed') {
        const emptyView = new ctor(pullIntoDescriptor.buffer, pullIntoDescriptor.byteOffset, 0);
        readIntoRequest._closeSteps(emptyView);
        return;
    }
    if (controller._queueTotalSize > 0) {
        if (ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor)) {
            const filledView = ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor);
            ReadableByteStreamControllerHandleQueueDrain(controller);
            readIntoRequest._chunkSteps(filledView);
            return;
        }
        if (controller._closeRequested) {
            const e = new TypeError('Insufficient bytes to fill elements in the given buffer');
            ReadableByteStreamControllerError(controller, e);
            readIntoRequest._errorSteps(e);
            return;
        }
    }
    controller._pendingPullIntos.push(pullIntoDescriptor);
    ReadableStreamAddReadIntoRequest(stream, readIntoRequest);
    ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerRespondInClosedState(controller, firstDescriptor) {
    const stream = controller._controlledReadableByteStream;
    if (ReadableStreamHasBYOBReader(stream)) {
        while (ReadableStreamGetNumReadIntoRequests(stream) > 0) {
            const pullIntoDescriptor = ReadableByteStreamControllerShiftPendingPullInto(controller);
            ReadableByteStreamControllerCommitPullIntoDescriptor(stream, pullIntoDescriptor);
        }
    }
}
function ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, pullIntoDescriptor) {
    ReadableByteStreamControllerFillHeadPullIntoDescriptor(controller, bytesWritten, pullIntoDescriptor);
    if (pullIntoDescriptor.bytesFilled < pullIntoDescriptor.elementSize) {
        return;
    }
    ReadableByteStreamControllerShiftPendingPullInto(controller);
    const remainderSize = pullIntoDescriptor.bytesFilled % pullIntoDescriptor.elementSize;
    if (remainderSize > 0) {
        const end = pullIntoDescriptor.byteOffset + pullIntoDescriptor.bytesFilled;
        const remainder = ArrayBufferSlice(pullIntoDescriptor.buffer, end - remainderSize, end);
        ReadableByteStreamControllerEnqueueChunkToQueue(controller, remainder, 0, remainder.byteLength);
    }
    pullIntoDescriptor.bytesFilled -= remainderSize;
    ReadableByteStreamControllerCommitPullIntoDescriptor(controller._controlledReadableByteStream, pullIntoDescriptor);
    ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);
}
function ReadableByteStreamControllerRespondInternal(controller, bytesWritten) {
    const firstDescriptor = controller._pendingPullIntos.peek();
    ReadableByteStreamControllerInvalidateBYOBRequest(controller);
    const state = controller._controlledReadableByteStream._state;
    if (state === 'closed') {
        ReadableByteStreamControllerRespondInClosedState(controller);
    }
    else {
        ReadableByteStreamControllerRespondInReadableState(controller, bytesWritten, firstDescriptor);
    }
    ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerShiftPendingPullInto(controller) {
    const descriptor = controller._pendingPullIntos.shift();
    return descriptor;
}
function ReadableByteStreamControllerShouldCallPull(controller) {
    const stream = controller._controlledReadableByteStream;
    if (stream._state !== 'readable') {
        return false;
    }
    if (controller._closeRequested) {
        return false;
    }
    if (!controller._started) {
        return false;
    }
    if (ReadableStreamHasDefaultReader(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
        return true;
    }
    if (ReadableStreamHasBYOBReader(stream) && ReadableStreamGetNumReadIntoRequests(stream) > 0) {
        return true;
    }
    const desiredSize = ReadableByteStreamControllerGetDesiredSize(controller);
    if (desiredSize > 0) {
        return true;
    }
    return false;
}
function ReadableByteStreamControllerClearAlgorithms(controller) {
    controller._pullAlgorithm = undefined;
    controller._cancelAlgorithm = undefined;
}
// A client of ReadableByteStreamController may use these functions directly to bypass state check.
function ReadableByteStreamControllerClose(controller) {
    const stream = controller._controlledReadableByteStream;
    if (controller._closeRequested || stream._state !== 'readable') {
        return;
    }
    if (controller._queueTotalSize > 0) {
        controller._closeRequested = true;
        return;
    }
    if (controller._pendingPullIntos.length > 0) {
        const firstPendingPullInto = controller._pendingPullIntos.peek();
        if (firstPendingPullInto.bytesFilled > 0) {
            const e = new TypeError('Insufficient bytes to fill elements in the given buffer');
            ReadableByteStreamControllerError(controller, e);
            throw e;
        }
    }
    ReadableByteStreamControllerClearAlgorithms(controller);
    ReadableStreamClose(stream);
}
function ReadableByteStreamControllerEnqueue(controller, chunk) {
    const stream = controller._controlledReadableByteStream;
    if (controller._closeRequested || stream._state !== 'readable') {
        return;
    }
    const buffer = chunk.buffer;
    const byteOffset = chunk.byteOffset;
    const byteLength = chunk.byteLength;
    const transferredBuffer = TransferArrayBuffer(buffer);
    if (controller._pendingPullIntos.length > 0) {
        const firstPendingPullInto = controller._pendingPullIntos.peek();
        if (IsDetachedBuffer(firstPendingPullInto.buffer)) ;
        firstPendingPullInto.buffer = TransferArrayBuffer(firstPendingPullInto.buffer);
    }
    ReadableByteStreamControllerInvalidateBYOBRequest(controller);
    if (ReadableStreamHasDefaultReader(stream)) {
        if (ReadableStreamGetNumReadRequests(stream) === 0) {
            ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);
        }
        else {
            if (controller._pendingPullIntos.length > 0) {
                ReadableByteStreamControllerShiftPendingPullInto(controller);
            }
            const transferredView = new Uint8Array(transferredBuffer, byteOffset, byteLength);
            ReadableStreamFulfillReadRequest(stream, transferredView, false);
        }
    }
    else if (ReadableStreamHasBYOBReader(stream)) {
        // TODO: Ideally in this branch detaching should happen only if the buffer is not consumed fully.
        ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);
        ReadableByteStreamControllerProcessPullIntoDescriptorsUsingQueue(controller);
    }
    else {
        ReadableByteStreamControllerEnqueueChunkToQueue(controller, transferredBuffer, byteOffset, byteLength);
    }
    ReadableByteStreamControllerCallPullIfNeeded(controller);
}
function ReadableByteStreamControllerError(controller, e) {
    const stream = controller._controlledReadableByteStream;
    if (stream._state !== 'readable') {
        return;
    }
    ReadableByteStreamControllerClearPendingPullIntos(controller);
    ResetQueue(controller);
    ReadableByteStreamControllerClearAlgorithms(controller);
    ReadableStreamError(stream, e);
}
function ReadableByteStreamControllerGetBYOBRequest(controller) {
    if (controller._byobRequest === null && controller._pendingPullIntos.length > 0) {
        const firstDescriptor = controller._pendingPullIntos.peek();
        const view = new Uint8Array(firstDescriptor.buffer, firstDescriptor.byteOffset + firstDescriptor.bytesFilled, firstDescriptor.byteLength - firstDescriptor.bytesFilled);
        const byobRequest = Object.create(ReadableStreamBYOBRequest.prototype);
        SetUpReadableStreamBYOBRequest(byobRequest, controller, view);
        controller._byobRequest = byobRequest;
    }
    return controller._byobRequest;
}
function ReadableByteStreamControllerGetDesiredSize(controller) {
    const state = controller._controlledReadableByteStream._state;
    if (state === 'errored') {
        return null;
    }
    if (state === 'closed') {
        return 0;
    }
    return controller._strategyHWM - controller._queueTotalSize;
}
function ReadableByteStreamControllerRespond(controller, bytesWritten) {
    const firstDescriptor = controller._pendingPullIntos.peek();
    const state = controller._controlledReadableByteStream._state;
    if (state === 'closed') {
        if (bytesWritten !== 0) {
            throw new TypeError('bytesWritten must be 0 when calling respond() on a closed stream');
        }
    }
    else {
        if (bytesWritten === 0) {
            throw new TypeError('bytesWritten must be greater than 0 when calling respond() on a readable stream');
        }
        if (firstDescriptor.bytesFilled + bytesWritten > firstDescriptor.byteLength) {
            throw new RangeError('bytesWritten out of range');
        }
    }
    firstDescriptor.buffer = TransferArrayBuffer(firstDescriptor.buffer);
    ReadableByteStreamControllerRespondInternal(controller, bytesWritten);
}
function ReadableByteStreamControllerRespondWithNewView(controller, view) {
    const firstDescriptor = controller._pendingPullIntos.peek();
    const state = controller._controlledReadableByteStream._state;
    if (state === 'closed') {
        if (view.byteLength !== 0) {
            throw new TypeError('The view\'s length must be 0 when calling respondWithNewView() on a closed stream');
        }
    }
    else {
        if (view.byteLength === 0) {
            throw new TypeError('The view\'s length must be greater than 0 when calling respondWithNewView() on a readable stream');
        }
    }
    if (firstDescriptor.byteOffset + firstDescriptor.bytesFilled !== view.byteOffset) {
        throw new RangeError('The region specified by view does not match byobRequest');
    }
    if (firstDescriptor.bufferByteLength !== view.buffer.byteLength) {
        throw new RangeError('The buffer of view has different capacity than byobRequest');
    }
    if (firstDescriptor.bytesFilled + view.byteLength > firstDescriptor.byteLength) {
        throw new RangeError('The region specified by view is larger than byobRequest');
    }
    const viewByteLength = view.byteLength;
    firstDescriptor.buffer = TransferArrayBuffer(view.buffer);
    ReadableByteStreamControllerRespondInternal(controller, viewByteLength);
}
function SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize) {
    controller._controlledReadableByteStream = stream;
    controller._pullAgain = false;
    controller._pulling = false;
    controller._byobRequest = null;
    // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.
    controller._queue = controller._queueTotalSize = undefined;
    ResetQueue(controller);
    controller._closeRequested = false;
    controller._started = false;
    controller._strategyHWM = highWaterMark;
    controller._pullAlgorithm = pullAlgorithm;
    controller._cancelAlgorithm = cancelAlgorithm;
    controller._autoAllocateChunkSize = autoAllocateChunkSize;
    controller._pendingPullIntos = new SimpleQueue();
    stream._readableStreamController = controller;
    const startResult = startAlgorithm();
    uponPromise(promiseResolvedWith(startResult), () => {
        controller._started = true;
        ReadableByteStreamControllerCallPullIfNeeded(controller);
    }, r => {
        ReadableByteStreamControllerError(controller, r);
    });
}
function SetUpReadableByteStreamControllerFromUnderlyingSource(stream, underlyingByteSource, highWaterMark) {
    const controller = Object.create(ReadableByteStreamController.prototype);
    let startAlgorithm = () => undefined;
    let pullAlgorithm = () => promiseResolvedWith(undefined);
    let cancelAlgorithm = () => promiseResolvedWith(undefined);
    if (underlyingByteSource.start !== undefined) {
        startAlgorithm = () => underlyingByteSource.start(controller);
    }
    if (underlyingByteSource.pull !== undefined) {
        pullAlgorithm = () => underlyingByteSource.pull(controller);
    }
    if (underlyingByteSource.cancel !== undefined) {
        cancelAlgorithm = reason => underlyingByteSource.cancel(reason);
    }
    const autoAllocateChunkSize = underlyingByteSource.autoAllocateChunkSize;
    if (autoAllocateChunkSize === 0) {
        throw new TypeError('autoAllocateChunkSize must be greater than 0');
    }
    SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, autoAllocateChunkSize);
}
function SetUpReadableStreamBYOBRequest(request, controller, view) {
    request._associatedReadableByteStreamController = controller;
    request._view = view;
}
// Helper functions for the ReadableStreamBYOBRequest.
function byobRequestBrandCheckException(name) {
    return new TypeError(`ReadableStreamBYOBRequest.prototype.${name} can only be used on a ReadableStreamBYOBRequest`);
}
// Helper functions for the ReadableByteStreamController.
function byteStreamControllerBrandCheckException(name) {
    return new TypeError(`ReadableByteStreamController.prototype.${name} can only be used on a ReadableByteStreamController`);
}

// Abstract operations for the ReadableStream.
function AcquireReadableStreamBYOBReader(stream) {
    return new ReadableStreamBYOBReader(stream);
}
// ReadableStream API exposed for controllers.
function ReadableStreamAddReadIntoRequest(stream, readIntoRequest) {
    stream._reader._readIntoRequests.push(readIntoRequest);
}
function ReadableStreamFulfillReadIntoRequest(stream, chunk, done) {
    const reader = stream._reader;
    const readIntoRequest = reader._readIntoRequests.shift();
    if (done) {
        readIntoRequest._closeSteps(chunk);
    }
    else {
        readIntoRequest._chunkSteps(chunk);
    }
}
function ReadableStreamGetNumReadIntoRequests(stream) {
    return stream._reader._readIntoRequests.length;
}
function ReadableStreamHasBYOBReader(stream) {
    const reader = stream._reader;
    if (reader === undefined) {
        return false;
    }
    if (!IsReadableStreamBYOBReader(reader)) {
        return false;
    }
    return true;
}
/**
 * A BYOB reader vended by a {@link ReadableStream}.
 *
 * @public
 */
class ReadableStreamBYOBReader {
    constructor(stream) {
        assertRequiredArgument(stream, 1, 'ReadableStreamBYOBReader');
        assertReadableStream(stream, 'First parameter');
        if (IsReadableStreamLocked(stream)) {
            throw new TypeError('This stream has already been locked for exclusive reading by another reader');
        }
        if (!IsReadableByteStreamController(stream._readableStreamController)) {
            throw new TypeError('Cannot construct a ReadableStreamBYOBReader for a stream not constructed with a byte ' +
                'source');
        }
        ReadableStreamReaderGenericInitialize(this, stream);
        this._readIntoRequests = new SimpleQueue();
    }
    /**
     * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or
     * the reader's lock is released before the stream finishes closing.
     */
    get closed() {
        if (!IsReadableStreamBYOBReader(this)) {
            return promiseRejectedWith(byobReaderBrandCheckException('closed'));
        }
        return this._closedPromise;
    }
    /**
     * If the reader is active, behaves the same as {@link ReadableStream.cancel | stream.cancel(reason)}.
     */
    cancel(reason = undefined) {
        if (!IsReadableStreamBYOBReader(this)) {
            return promiseRejectedWith(byobReaderBrandCheckException('cancel'));
        }
        if (this._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('cancel'));
        }
        return ReadableStreamReaderGenericCancel(this, reason);
    }
    /**
     * Attempts to reads bytes into view, and returns a promise resolved with the result.
     *
     * If reading a chunk causes the queue to become empty, more data will be pulled from the underlying source.
     */
    read(view) {
        if (!IsReadableStreamBYOBReader(this)) {
            return promiseRejectedWith(byobReaderBrandCheckException('read'));
        }
        if (!ArrayBuffer.isView(view)) {
            return promiseRejectedWith(new TypeError('view must be an array buffer view'));
        }
        if (view.byteLength === 0) {
            return promiseRejectedWith(new TypeError('view must have non-zero byteLength'));
        }
        if (view.buffer.byteLength === 0) {
            return promiseRejectedWith(new TypeError(`view's buffer must have non-zero byteLength`));
        }
        if (IsDetachedBuffer(view.buffer)) ;
        if (this._ownerReadableStream === undefined) {
            return promiseRejectedWith(readerLockException('read from'));
        }
        let resolvePromise;
        let rejectPromise;
        const promise = newPromise((resolve, reject) => {
            resolvePromise = resolve;
            rejectPromise = reject;
        });
        const readIntoRequest = {
            _chunkSteps: chunk => resolvePromise({ value: chunk, done: false }),
            _closeSteps: chunk => resolvePromise({ value: chunk, done: true }),
            _errorSteps: e => rejectPromise(e)
        };
        ReadableStreamBYOBReaderRead(this, view, readIntoRequest);
        return promise;
    }
    /**
     * Releases the reader's lock on the corresponding stream. After the lock is released, the reader is no longer active.
     * If the associated stream is errored when the lock is released, the reader will appear errored in the same way
     * from now on; otherwise, the reader will appear closed.
     *
     * A reader's lock cannot be released while it still has a pending read request, i.e., if a promise returned by
     * the reader's {@link ReadableStreamBYOBReader.read | read()} method has not yet been settled. Attempting to
     * do so will throw a `TypeError` and leave the reader locked to the stream.
     */
    releaseLock() {
        if (!IsReadableStreamBYOBReader(this)) {
            throw byobReaderBrandCheckException('releaseLock');
        }
        if (this._ownerReadableStream === undefined) {
            return;
        }
        if (this._readIntoRequests.length > 0) {
            throw new TypeError('Tried to release a reader lock when that reader has pending read() calls un-settled');
        }
        ReadableStreamReaderGenericRelease(this);
    }
}
Object.defineProperties(ReadableStreamBYOBReader.prototype, {
    cancel: { enumerable: true },
    read: { enumerable: true },
    releaseLock: { enumerable: true },
    closed: { enumerable: true }
});
// Abstract operations for the readers.
function IsReadableStreamBYOBReader(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_readIntoRequests')) {
        return false;
    }
    return x instanceof ReadableStreamBYOBReader;
}
function ReadableStreamBYOBReaderRead(reader, view, readIntoRequest) {
    const stream = reader._ownerReadableStream;
    stream._disturbed = true;
    if (stream._state === 'errored') {
        readIntoRequest._errorSteps(stream._storedError);
    }
    else {
        ReadableByteStreamControllerPullInto(stream._readableStreamController, view, readIntoRequest);
    }
}
// Helper functions for the ReadableStreamBYOBReader.
function byobReaderBrandCheckException(name) {
    return new TypeError(`ReadableStreamBYOBReader.prototype.${name} can only be used on a ReadableStreamBYOBReader`);
}

function ExtractHighWaterMark(strategy, defaultHWM) {
    const { highWaterMark } = strategy;
    if (highWaterMark === undefined) {
        return defaultHWM;
    }
    if (NumberIsNaN(highWaterMark) || highWaterMark < 0) {
        throw new RangeError('Invalid highWaterMark');
    }
    return highWaterMark;
}
function ExtractSizeAlgorithm(strategy) {
    const { size } = strategy;
    if (!size) {
        return () => 1;
    }
    return size;
}

function convertQueuingStrategy(init, context) {
    assertDictionary(init, context);
    const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;
    const size = init === null || init === void 0 ? void 0 : init.size;
    return {
        highWaterMark: highWaterMark === undefined ? undefined : convertUnrestrictedDouble(highWaterMark),
        size: size === undefined ? undefined : convertQueuingStrategySize(size, `${context} has member 'size' that`)
    };
}
function convertQueuingStrategySize(fn, context) {
    assertFunction(fn, context);
    return chunk => convertUnrestrictedDouble(fn(chunk));
}

function convertUnderlyingSink(original, context) {
    assertDictionary(original, context);
    const abort = original === null || original === void 0 ? void 0 : original.abort;
    const close = original === null || original === void 0 ? void 0 : original.close;
    const start = original === null || original === void 0 ? void 0 : original.start;
    const type = original === null || original === void 0 ? void 0 : original.type;
    const write = original === null || original === void 0 ? void 0 : original.write;
    return {
        abort: abort === undefined ?
            undefined :
            convertUnderlyingSinkAbortCallback(abort, original, `${context} has member 'abort' that`),
        close: close === undefined ?
            undefined :
            convertUnderlyingSinkCloseCallback(close, original, `${context} has member 'close' that`),
        start: start === undefined ?
            undefined :
            convertUnderlyingSinkStartCallback(start, original, `${context} has member 'start' that`),
        write: write === undefined ?
            undefined :
            convertUnderlyingSinkWriteCallback(write, original, `${context} has member 'write' that`),
        type
    };
}
function convertUnderlyingSinkAbortCallback(fn, original, context) {
    assertFunction(fn, context);
    return (reason) => promiseCall(fn, original, [reason]);
}
function convertUnderlyingSinkCloseCallback(fn, original, context) {
    assertFunction(fn, context);
    return () => promiseCall(fn, original, []);
}
function convertUnderlyingSinkStartCallback(fn, original, context) {
    assertFunction(fn, context);
    return (controller) => reflectCall(fn, original, [controller]);
}
function convertUnderlyingSinkWriteCallback(fn, original, context) {
    assertFunction(fn, context);
    return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);
}

function assertWritableStream(x, context) {
    if (!IsWritableStream(x)) {
        throw new TypeError(`${context} is not a WritableStream.`);
    }
}

function isAbortSignal$1(value) {
    if (typeof value !== 'object' || value === null) {
        return false;
    }
    try {
        return typeof value.aborted === 'boolean';
    }
    catch (_a) {
        // AbortSignal.prototype.aborted throws if its brand check fails
        return false;
    }
}

/**
 * A writable stream represents a destination for data, into which you can write.
 *
 * @public
 */
class WritableStream {
    constructor(rawUnderlyingSink = {}, rawStrategy = {}) {
        if (rawUnderlyingSink === undefined) {
            rawUnderlyingSink = null;
        }
        else {
            assertObject(rawUnderlyingSink, 'First parameter');
        }
        const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');
        const underlyingSink = convertUnderlyingSink(rawUnderlyingSink, 'First parameter');
        InitializeWritableStream(this);
        const type = underlyingSink.type;
        if (type !== undefined) {
            throw new RangeError('Invalid type is specified');
        }
        const sizeAlgorithm = ExtractSizeAlgorithm(strategy);
        const highWaterMark = ExtractHighWaterMark(strategy, 1);
        SetUpWritableStreamDefaultControllerFromUnderlyingSink(this, underlyingSink, highWaterMark, sizeAlgorithm);
    }
    /**
     * Returns whether or not the writable stream is locked to a writer.
     */
    get locked() {
        if (!IsWritableStream(this)) {
            throw streamBrandCheckException$2('locked');
        }
        return IsWritableStreamLocked(this);
    }
    /**
     * Aborts the stream, signaling that the producer can no longer successfully write to the stream and it is to be
     * immediately moved to an errored state, with any queued-up writes discarded. This will also execute any abort
     * mechanism of the underlying sink.
     *
     * The returned promise will fulfill if the stream shuts down successfully, or reject if the underlying sink signaled
     * that there was an error doing so. Additionally, it will reject with a `TypeError` (without attempting to cancel
     * the stream) if the stream is currently locked.
     */
    abort(reason = undefined) {
        if (!IsWritableStream(this)) {
            return promiseRejectedWith(streamBrandCheckException$2('abort'));
        }
        if (IsWritableStreamLocked(this)) {
            return promiseRejectedWith(new TypeError('Cannot abort a stream that already has a writer'));
        }
        return WritableStreamAbort(this, reason);
    }
    /**
     * Closes the stream. The underlying sink will finish processing any previously-written chunks, before invoking its
     * close behavior. During this time any further attempts to write will fail (without erroring the stream).
     *
     * The method returns a promise that will fulfill if all remaining chunks are successfully written and the stream
     * successfully closes, or rejects if an error is encountered during this process. Additionally, it will reject with
     * a `TypeError` (without attempting to cancel the stream) if the stream is currently locked.
     */
    close() {
        if (!IsWritableStream(this)) {
            return promiseRejectedWith(streamBrandCheckException$2('close'));
        }
        if (IsWritableStreamLocked(this)) {
            return promiseRejectedWith(new TypeError('Cannot close a stream that already has a writer'));
        }
        if (WritableStreamCloseQueuedOrInFlight(this)) {
            return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));
        }
        return WritableStreamClose(this);
    }
    /**
     * Creates a {@link WritableStreamDefaultWriter | writer} and locks the stream to the new writer. While the stream
     * is locked, no other writer can be acquired until this one is released.
     *
     * This functionality is especially useful for creating abstractions that desire the ability to write to a stream
     * without interruption or interleaving. By getting a writer for the stream, you can ensure nobody else can write at
     * the same time, which would cause the resulting written data to be unpredictable and probably useless.
     */
    getWriter() {
        if (!IsWritableStream(this)) {
            throw streamBrandCheckException$2('getWriter');
        }
        return AcquireWritableStreamDefaultWriter(this);
    }
}
Object.defineProperties(WritableStream.prototype, {
    abort: { enumerable: true },
    close: { enumerable: true },
    getWriter: { enumerable: true },
    locked: { enumerable: true }
});
// Abstract operations for the WritableStream.
function AcquireWritableStreamDefaultWriter(stream) {
    return new WritableStreamDefaultWriter(stream);
}
// Throws if and only if startAlgorithm throws.
function CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {
    const stream = Object.create(WritableStream.prototype);
    InitializeWritableStream(stream);
    const controller = Object.create(WritableStreamDefaultController.prototype);
    SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);
    return stream;
}
function InitializeWritableStream(stream) {
    stream._state = 'writable';
    // The error that will be reported by new method calls once the state becomes errored. Only set when [[state]] is
    // 'erroring' or 'errored'. May be set to an undefined value.
    stream._storedError = undefined;
    stream._writer = undefined;
    // Initialize to undefined first because the constructor of the controller checks this
    // variable to validate the caller.
    stream._writableStreamController = undefined;
    // This queue is placed here instead of the writer class in order to allow for passing a writer to the next data
    // producer without waiting for the queued writes to finish.
    stream._writeRequests = new SimpleQueue();
    // Write requests are removed from _writeRequests when write() is called on the underlying sink. This prevents
    // them from being erroneously rejected on error. If a write() call is in-flight, the request is stored here.
    stream._inFlightWriteRequest = undefined;
    // The promise that was returned from writer.close(). Stored here because it may be fulfilled after the writer
    // has been detached.
    stream._closeRequest = undefined;
    // Close request is removed from _closeRequest when close() is called on the underlying sink. This prevents it
    // from being erroneously rejected on error. If a close() call is in-flight, the request is stored here.
    stream._inFlightCloseRequest = undefined;
    // The promise that was returned from writer.abort(). This may also be fulfilled after the writer has detached.
    stream._pendingAbortRequest = undefined;
    // The backpressure signal set by the controller.
    stream._backpressure = false;
}
function IsWritableStream(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_writableStreamController')) {
        return false;
    }
    return x instanceof WritableStream;
}
function IsWritableStreamLocked(stream) {
    if (stream._writer === undefined) {
        return false;
    }
    return true;
}
function WritableStreamAbort(stream, reason) {
    var _a;
    if (stream._state === 'closed' || stream._state === 'errored') {
        return promiseResolvedWith(undefined);
    }
    stream._writableStreamController._abortReason = reason;
    (_a = stream._writableStreamController._abortController) === null || _a === void 0 ? void 0 : _a.abort();
    // TypeScript narrows the type of `stream._state` down to 'writable' | 'erroring',
    // but it doesn't know that signaling abort runs author code that might have changed the state.
    // Widen the type again by casting to WritableStreamState.
    const state = stream._state;
    if (state === 'closed' || state === 'errored') {
        return promiseResolvedWith(undefined);
    }
    if (stream._pendingAbortRequest !== undefined) {
        return stream._pendingAbortRequest._promise;
    }
    let wasAlreadyErroring = false;
    if (state === 'erroring') {
        wasAlreadyErroring = true;
        // reason will not be used, so don't keep a reference to it.
        reason = undefined;
    }
    const promise = newPromise((resolve, reject) => {
        stream._pendingAbortRequest = {
            _promise: undefined,
            _resolve: resolve,
            _reject: reject,
            _reason: reason,
            _wasAlreadyErroring: wasAlreadyErroring
        };
    });
    stream._pendingAbortRequest._promise = promise;
    if (!wasAlreadyErroring) {
        WritableStreamStartErroring(stream, reason);
    }
    return promise;
}
function WritableStreamClose(stream) {
    const state = stream._state;
    if (state === 'closed' || state === 'errored') {
        return promiseRejectedWith(new TypeError(`The stream (in ${state} state) is not in the writable state and cannot be closed`));
    }
    const promise = newPromise((resolve, reject) => {
        const closeRequest = {
            _resolve: resolve,
            _reject: reject
        };
        stream._closeRequest = closeRequest;
    });
    const writer = stream._writer;
    if (writer !== undefined && stream._backpressure && state === 'writable') {
        defaultWriterReadyPromiseResolve(writer);
    }
    WritableStreamDefaultControllerClose(stream._writableStreamController);
    return promise;
}
// WritableStream API exposed for controllers.
function WritableStreamAddWriteRequest(stream) {
    const promise = newPromise((resolve, reject) => {
        const writeRequest = {
            _resolve: resolve,
            _reject: reject
        };
        stream._writeRequests.push(writeRequest);
    });
    return promise;
}
function WritableStreamDealWithRejection(stream, error) {
    const state = stream._state;
    if (state === 'writable') {
        WritableStreamStartErroring(stream, error);
        return;
    }
    WritableStreamFinishErroring(stream);
}
function WritableStreamStartErroring(stream, reason) {
    const controller = stream._writableStreamController;
    stream._state = 'erroring';
    stream._storedError = reason;
    const writer = stream._writer;
    if (writer !== undefined) {
        WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, reason);
    }
    if (!WritableStreamHasOperationMarkedInFlight(stream) && controller._started) {
        WritableStreamFinishErroring(stream);
    }
}
function WritableStreamFinishErroring(stream) {
    stream._state = 'errored';
    stream._writableStreamController[ErrorSteps]();
    const storedError = stream._storedError;
    stream._writeRequests.forEach(writeRequest => {
        writeRequest._reject(storedError);
    });
    stream._writeRequests = new SimpleQueue();
    if (stream._pendingAbortRequest === undefined) {
        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
        return;
    }
    const abortRequest = stream._pendingAbortRequest;
    stream._pendingAbortRequest = undefined;
    if (abortRequest._wasAlreadyErroring) {
        abortRequest._reject(storedError);
        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
        return;
    }
    const promise = stream._writableStreamController[AbortSteps](abortRequest._reason);
    uponPromise(promise, () => {
        abortRequest._resolve();
        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
    }, (reason) => {
        abortRequest._reject(reason);
        WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream);
    });
}
function WritableStreamFinishInFlightWrite(stream) {
    stream._inFlightWriteRequest._resolve(undefined);
    stream._inFlightWriteRequest = undefined;
}
function WritableStreamFinishInFlightWriteWithError(stream, error) {
    stream._inFlightWriteRequest._reject(error);
    stream._inFlightWriteRequest = undefined;
    WritableStreamDealWithRejection(stream, error);
}
function WritableStreamFinishInFlightClose(stream) {
    stream._inFlightCloseRequest._resolve(undefined);
    stream._inFlightCloseRequest = undefined;
    const state = stream._state;
    if (state === 'erroring') {
        // The error was too late to do anything, so it is ignored.
        stream._storedError = undefined;
        if (stream._pendingAbortRequest !== undefined) {
            stream._pendingAbortRequest._resolve();
            stream._pendingAbortRequest = undefined;
        }
    }
    stream._state = 'closed';
    const writer = stream._writer;
    if (writer !== undefined) {
        defaultWriterClosedPromiseResolve(writer);
    }
}
function WritableStreamFinishInFlightCloseWithError(stream, error) {
    stream._inFlightCloseRequest._reject(error);
    stream._inFlightCloseRequest = undefined;
    // Never execute sink abort() after sink close().
    if (stream._pendingAbortRequest !== undefined) {
        stream._pendingAbortRequest._reject(error);
        stream._pendingAbortRequest = undefined;
    }
    WritableStreamDealWithRejection(stream, error);
}
// TODO(ricea): Fix alphabetical order.
function WritableStreamCloseQueuedOrInFlight(stream) {
    if (stream._closeRequest === undefined && stream._inFlightCloseRequest === undefined) {
        return false;
    }
    return true;
}
function WritableStreamHasOperationMarkedInFlight(stream) {
    if (stream._inFlightWriteRequest === undefined && stream._inFlightCloseRequest === undefined) {
        return false;
    }
    return true;
}
function WritableStreamMarkCloseRequestInFlight(stream) {
    stream._inFlightCloseRequest = stream._closeRequest;
    stream._closeRequest = undefined;
}
function WritableStreamMarkFirstWriteRequestInFlight(stream) {
    stream._inFlightWriteRequest = stream._writeRequests.shift();
}
function WritableStreamRejectCloseAndClosedPromiseIfNeeded(stream) {
    if (stream._closeRequest !== undefined) {
        stream._closeRequest._reject(stream._storedError);
        stream._closeRequest = undefined;
    }
    const writer = stream._writer;
    if (writer !== undefined) {
        defaultWriterClosedPromiseReject(writer, stream._storedError);
    }
}
function WritableStreamUpdateBackpressure(stream, backpressure) {
    const writer = stream._writer;
    if (writer !== undefined && backpressure !== stream._backpressure) {
        if (backpressure) {
            defaultWriterReadyPromiseReset(writer);
        }
        else {
            defaultWriterReadyPromiseResolve(writer);
        }
    }
    stream._backpressure = backpressure;
}
/**
 * A default writer vended by a {@link WritableStream}.
 *
 * @public
 */
class WritableStreamDefaultWriter {
    constructor(stream) {
        assertRequiredArgument(stream, 1, 'WritableStreamDefaultWriter');
        assertWritableStream(stream, 'First parameter');
        if (IsWritableStreamLocked(stream)) {
            throw new TypeError('This stream has already been locked for exclusive writing by another writer');
        }
        this._ownerWritableStream = stream;
        stream._writer = this;
        const state = stream._state;
        if (state === 'writable') {
            if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._backpressure) {
                defaultWriterReadyPromiseInitialize(this);
            }
            else {
                defaultWriterReadyPromiseInitializeAsResolved(this);
            }
            defaultWriterClosedPromiseInitialize(this);
        }
        else if (state === 'erroring') {
            defaultWriterReadyPromiseInitializeAsRejected(this, stream._storedError);
            defaultWriterClosedPromiseInitialize(this);
        }
        else if (state === 'closed') {
            defaultWriterReadyPromiseInitializeAsResolved(this);
            defaultWriterClosedPromiseInitializeAsResolved(this);
        }
        else {
            const storedError = stream._storedError;
            defaultWriterReadyPromiseInitializeAsRejected(this, storedError);
            defaultWriterClosedPromiseInitializeAsRejected(this, storedError);
        }
    }
    /**
     * Returns a promise that will be fulfilled when the stream becomes closed, or rejected if the stream ever errors or
     * the writer’s lock is released before the stream finishes closing.
     */
    get closed() {
        if (!IsWritableStreamDefaultWriter(this)) {
            return promiseRejectedWith(defaultWriterBrandCheckException('closed'));
        }
        return this._closedPromise;
    }
    /**
     * Returns the desired size to fill the stream’s internal queue. It can be negative, if the queue is over-full.
     * A producer can use this information to determine the right amount of data to write.
     *
     * It will be `null` if the stream cannot be successfully written to (due to either being errored, or having an abort
     * queued up). It will return zero if the stream is closed. And the getter will throw an exception if invoked when
     * the writer’s lock is released.
     */
    get desiredSize() {
        if (!IsWritableStreamDefaultWriter(this)) {
            throw defaultWriterBrandCheckException('desiredSize');
        }
        if (this._ownerWritableStream === undefined) {
            throw defaultWriterLockException('desiredSize');
        }
        return WritableStreamDefaultWriterGetDesiredSize(this);
    }
    /**
     * Returns a promise that will be fulfilled when the desired size to fill the stream’s internal queue transitions
     * from non-positive to positive, signaling that it is no longer applying backpressure. Once the desired size dips
     * back to zero or below, the getter will return a new promise that stays pending until the next transition.
     *
     * If the stream becomes errored or aborted, or the writer’s lock is released, the returned promise will become
     * rejected.
     */
    get ready() {
        if (!IsWritableStreamDefaultWriter(this)) {
            return promiseRejectedWith(defaultWriterBrandCheckException('ready'));
        }
        return this._readyPromise;
    }
    /**
     * If the reader is active, behaves the same as {@link WritableStream.abort | stream.abort(reason)}.
     */
    abort(reason = undefined) {
        if (!IsWritableStreamDefaultWriter(this)) {
            return promiseRejectedWith(defaultWriterBrandCheckException('abort'));
        }
        if (this._ownerWritableStream === undefined) {
            return promiseRejectedWith(defaultWriterLockException('abort'));
        }
        return WritableStreamDefaultWriterAbort(this, reason);
    }
    /**
     * If the reader is active, behaves the same as {@link WritableStream.close | stream.close()}.
     */
    close() {
        if (!IsWritableStreamDefaultWriter(this)) {
            return promiseRejectedWith(defaultWriterBrandCheckException('close'));
        }
        const stream = this._ownerWritableStream;
        if (stream === undefined) {
            return promiseRejectedWith(defaultWriterLockException('close'));
        }
        if (WritableStreamCloseQueuedOrInFlight(stream)) {
            return promiseRejectedWith(new TypeError('Cannot close an already-closing stream'));
        }
        return WritableStreamDefaultWriterClose(this);
    }
    /**
     * Releases the writer’s lock on the corresponding stream. After the lock is released, the writer is no longer active.
     * If the associated stream is errored when the lock is released, the writer will appear errored in the same way from
     * now on; otherwise, the writer will appear closed.
     *
     * Note that the lock can still be released even if some ongoing writes have not yet finished (i.e. even if the
     * promises returned from previous calls to {@link WritableStreamDefaultWriter.write | write()} have not yet settled).
     * It’s not necessary to hold the lock on the writer for the duration of the write; the lock instead simply prevents
     * other producers from writing in an interleaved manner.
     */
    releaseLock() {
        if (!IsWritableStreamDefaultWriter(this)) {
            throw defaultWriterBrandCheckException('releaseLock');
        }
        const stream = this._ownerWritableStream;
        if (stream === undefined) {
            return;
        }
        WritableStreamDefaultWriterRelease(this);
    }
    write(chunk = undefined) {
        if (!IsWritableStreamDefaultWriter(this)) {
            return promiseRejectedWith(defaultWriterBrandCheckException('write'));
        }
        if (this._ownerWritableStream === undefined) {
            return promiseRejectedWith(defaultWriterLockException('write to'));
        }
        return WritableStreamDefaultWriterWrite(this, chunk);
    }
}
Object.defineProperties(WritableStreamDefaultWriter.prototype, {
    abort: { enumerable: true },
    close: { enumerable: true },
    releaseLock: { enumerable: true },
    write: { enumerable: true },
    closed: { enumerable: true },
    desiredSize: { enumerable: true },
    ready: { enumerable: true }
});
// Abstract operations for the WritableStreamDefaultWriter.
function IsWritableStreamDefaultWriter(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_ownerWritableStream')) {
        return false;
    }
    return x instanceof WritableStreamDefaultWriter;
}
// A client of WritableStreamDefaultWriter may use these functions directly to bypass state check.
function WritableStreamDefaultWriterAbort(writer, reason) {
    const stream = writer._ownerWritableStream;
    return WritableStreamAbort(stream, reason);
}
function WritableStreamDefaultWriterClose(writer) {
    const stream = writer._ownerWritableStream;
    return WritableStreamClose(stream);
}
function WritableStreamDefaultWriterCloseWithErrorPropagation(writer) {
    const stream = writer._ownerWritableStream;
    const state = stream._state;
    if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {
        return promiseResolvedWith(undefined);
    }
    if (state === 'errored') {
        return promiseRejectedWith(stream._storedError);
    }
    return WritableStreamDefaultWriterClose(writer);
}
function WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, error) {
    if (writer._closedPromiseState === 'pending') {
        defaultWriterClosedPromiseReject(writer, error);
    }
    else {
        defaultWriterClosedPromiseResetToRejected(writer, error);
    }
}
function WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, error) {
    if (writer._readyPromiseState === 'pending') {
        defaultWriterReadyPromiseReject(writer, error);
    }
    else {
        defaultWriterReadyPromiseResetToRejected(writer, error);
    }
}
function WritableStreamDefaultWriterGetDesiredSize(writer) {
    const stream = writer._ownerWritableStream;
    const state = stream._state;
    if (state === 'errored' || state === 'erroring') {
        return null;
    }
    if (state === 'closed') {
        return 0;
    }
    return WritableStreamDefaultControllerGetDesiredSize(stream._writableStreamController);
}
function WritableStreamDefaultWriterRelease(writer) {
    const stream = writer._ownerWritableStream;
    const releasedError = new TypeError(`Writer was released and can no longer be used to monitor the stream's closedness`);
    WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError);
    // The state transitions to "errored" before the sink abort() method runs, but the writer.closed promise is not
    // rejected until afterwards. This means that simply testing state will not work.
    WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError);
    stream._writer = undefined;
    writer._ownerWritableStream = undefined;
}
function WritableStreamDefaultWriterWrite(writer, chunk) {
    const stream = writer._ownerWritableStream;
    const controller = stream._writableStreamController;
    const chunkSize = WritableStreamDefaultControllerGetChunkSize(controller, chunk);
    if (stream !== writer._ownerWritableStream) {
        return promiseRejectedWith(defaultWriterLockException('write to'));
    }
    const state = stream._state;
    if (state === 'errored') {
        return promiseRejectedWith(stream._storedError);
    }
    if (WritableStreamCloseQueuedOrInFlight(stream) || state === 'closed') {
        return promiseRejectedWith(new TypeError('The stream is closing or closed and cannot be written to'));
    }
    if (state === 'erroring') {
        return promiseRejectedWith(stream._storedError);
    }
    const promise = WritableStreamAddWriteRequest(stream);
    WritableStreamDefaultControllerWrite(controller, chunk, chunkSize);
    return promise;
}
const closeSentinel = {};
/**
 * Allows control of a {@link WritableStream | writable stream}'s state and internal queue.
 *
 * @public
 */
class WritableStreamDefaultController {
    constructor() {
        throw new TypeError('Illegal constructor');
    }
    /**
     * The reason which was passed to `WritableStream.abort(reason)` when the stream was aborted.
     *
     * @deprecated
     *  This property has been removed from the specification, see https://github.com/whatwg/streams/pull/1177.
     *  Use {@link WritableStreamDefaultController.signal}'s `reason` instead.
     */
    get abortReason() {
        if (!IsWritableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$2('abortReason');
        }
        return this._abortReason;
    }
    /**
     * An `AbortSignal` that can be used to abort the pending write or close operation when the stream is aborted.
     */
    get signal() {
        if (!IsWritableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$2('signal');
        }
        if (this._abortController === undefined) {
            // Older browsers or older Node versions may not support `AbortController` or `AbortSignal`.
            // We don't want to bundle and ship an `AbortController` polyfill together with our polyfill,
            // so instead we only implement support for `signal` if we find a global `AbortController` constructor.
            throw new TypeError('WritableStreamDefaultController.prototype.signal is not supported');
        }
        return this._abortController.signal;
    }
    /**
     * Closes the controlled writable stream, making all future interactions with it fail with the given error `e`.
     *
     * This method is rarely used, since usually it suffices to return a rejected promise from one of the underlying
     * sink's methods. However, it can be useful for suddenly shutting down a stream in response to an event outside the
     * normal lifecycle of interactions with the underlying sink.
     */
    error(e = undefined) {
        if (!IsWritableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$2('error');
        }
        const state = this._controlledWritableStream._state;
        if (state !== 'writable') {
            // The stream is closed, errored or will be soon. The sink can't do anything useful if it gets an error here, so
            // just treat it as a no-op.
            return;
        }
        WritableStreamDefaultControllerError(this, e);
    }
    /** @internal */
    [AbortSteps](reason) {
        const result = this._abortAlgorithm(reason);
        WritableStreamDefaultControllerClearAlgorithms(this);
        return result;
    }
    /** @internal */
    [ErrorSteps]() {
        ResetQueue(this);
    }
}
Object.defineProperties(WritableStreamDefaultController.prototype, {
    abortReason: { enumerable: true },
    signal: { enumerable: true },
    error: { enumerable: true }
});
// Abstract operations implementing interface required by the WritableStream.
function IsWritableStreamDefaultController(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_controlledWritableStream')) {
        return false;
    }
    return x instanceof WritableStreamDefaultController;
}
function SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm) {
    controller._controlledWritableStream = stream;
    stream._writableStreamController = controller;
    // Need to set the slots so that the assert doesn't fire. In the spec the slots already exist implicitly.
    controller._queue = undefined;
    controller._queueTotalSize = undefined;
    ResetQueue(controller);
    controller._abortReason = undefined;
    controller._abortController = new AbortController();
    controller._started = false;
    controller._strategySizeAlgorithm = sizeAlgorithm;
    controller._strategyHWM = highWaterMark;
    controller._writeAlgorithm = writeAlgorithm;
    controller._closeAlgorithm = closeAlgorithm;
    controller._abortAlgorithm = abortAlgorithm;
    const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
    WritableStreamUpdateBackpressure(stream, backpressure);
    const startResult = startAlgorithm();
    const startPromise = promiseResolvedWith(startResult);
    uponPromise(startPromise, () => {
        controller._started = true;
        WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
    }, r => {
        controller._started = true;
        WritableStreamDealWithRejection(stream, r);
    });
}
function SetUpWritableStreamDefaultControllerFromUnderlyingSink(stream, underlyingSink, highWaterMark, sizeAlgorithm) {
    const controller = Object.create(WritableStreamDefaultController.prototype);
    let startAlgorithm = () => undefined;
    let writeAlgorithm = () => promiseResolvedWith(undefined);
    let closeAlgorithm = () => promiseResolvedWith(undefined);
    let abortAlgorithm = () => promiseResolvedWith(undefined);
    if (underlyingSink.start !== undefined) {
        startAlgorithm = () => underlyingSink.start(controller);
    }
    if (underlyingSink.write !== undefined) {
        writeAlgorithm = chunk => underlyingSink.write(chunk, controller);
    }
    if (underlyingSink.close !== undefined) {
        closeAlgorithm = () => underlyingSink.close();
    }
    if (underlyingSink.abort !== undefined) {
        abortAlgorithm = reason => underlyingSink.abort(reason);
    }
    SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm);
}
// ClearAlgorithms may be called twice. Erroring the same stream in multiple ways will often result in redundant calls.
function WritableStreamDefaultControllerClearAlgorithms(controller) {
    controller._writeAlgorithm = undefined;
    controller._closeAlgorithm = undefined;
    controller._abortAlgorithm = undefined;
    controller._strategySizeAlgorithm = undefined;
}
function WritableStreamDefaultControllerClose(controller) {
    EnqueueValueWithSize(controller, closeSentinel, 0);
    WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
}
function WritableStreamDefaultControllerGetChunkSize(controller, chunk) {
    try {
        return controller._strategySizeAlgorithm(chunk);
    }
    catch (chunkSizeE) {
        WritableStreamDefaultControllerErrorIfNeeded(controller, chunkSizeE);
        return 1;
    }
}
function WritableStreamDefaultControllerGetDesiredSize(controller) {
    return controller._strategyHWM - controller._queueTotalSize;
}
function WritableStreamDefaultControllerWrite(controller, chunk, chunkSize) {
    try {
        EnqueueValueWithSize(controller, chunk, chunkSize);
    }
    catch (enqueueE) {
        WritableStreamDefaultControllerErrorIfNeeded(controller, enqueueE);
        return;
    }
    const stream = controller._controlledWritableStream;
    if (!WritableStreamCloseQueuedOrInFlight(stream) && stream._state === 'writable') {
        const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
        WritableStreamUpdateBackpressure(stream, backpressure);
    }
    WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
}
// Abstract operations for the WritableStreamDefaultController.
function WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller) {
    const stream = controller._controlledWritableStream;
    if (!controller._started) {
        return;
    }
    if (stream._inFlightWriteRequest !== undefined) {
        return;
    }
    const state = stream._state;
    if (state === 'erroring') {
        WritableStreamFinishErroring(stream);
        return;
    }
    if (controller._queue.length === 0) {
        return;
    }
    const value = PeekQueueValue(controller);
    if (value === closeSentinel) {
        WritableStreamDefaultControllerProcessClose(controller);
    }
    else {
        WritableStreamDefaultControllerProcessWrite(controller, value);
    }
}
function WritableStreamDefaultControllerErrorIfNeeded(controller, error) {
    if (controller._controlledWritableStream._state === 'writable') {
        WritableStreamDefaultControllerError(controller, error);
    }
}
function WritableStreamDefaultControllerProcessClose(controller) {
    const stream = controller._controlledWritableStream;
    WritableStreamMarkCloseRequestInFlight(stream);
    DequeueValue(controller);
    const sinkClosePromise = controller._closeAlgorithm();
    WritableStreamDefaultControllerClearAlgorithms(controller);
    uponPromise(sinkClosePromise, () => {
        WritableStreamFinishInFlightClose(stream);
    }, reason => {
        WritableStreamFinishInFlightCloseWithError(stream, reason);
    });
}
function WritableStreamDefaultControllerProcessWrite(controller, chunk) {
    const stream = controller._controlledWritableStream;
    WritableStreamMarkFirstWriteRequestInFlight(stream);
    const sinkWritePromise = controller._writeAlgorithm(chunk);
    uponPromise(sinkWritePromise, () => {
        WritableStreamFinishInFlightWrite(stream);
        const state = stream._state;
        DequeueValue(controller);
        if (!WritableStreamCloseQueuedOrInFlight(stream) && state === 'writable') {
            const backpressure = WritableStreamDefaultControllerGetBackpressure(controller);
            WritableStreamUpdateBackpressure(stream, backpressure);
        }
        WritableStreamDefaultControllerAdvanceQueueIfNeeded(controller);
    }, reason => {
        if (stream._state === 'writable') {
            WritableStreamDefaultControllerClearAlgorithms(controller);
        }
        WritableStreamFinishInFlightWriteWithError(stream, reason);
    });
}
function WritableStreamDefaultControllerGetBackpressure(controller) {
    const desiredSize = WritableStreamDefaultControllerGetDesiredSize(controller);
    return desiredSize <= 0;
}
// A client of WritableStreamDefaultController may use these functions directly to bypass state check.
function WritableStreamDefaultControllerError(controller, error) {
    const stream = controller._controlledWritableStream;
    WritableStreamDefaultControllerClearAlgorithms(controller);
    WritableStreamStartErroring(stream, error);
}
// Helper functions for the WritableStream.
function streamBrandCheckException$2(name) {
    return new TypeError(`WritableStream.prototype.${name} can only be used on a WritableStream`);
}
// Helper functions for the WritableStreamDefaultController.
function defaultControllerBrandCheckException$2(name) {
    return new TypeError(`WritableStreamDefaultController.prototype.${name} can only be used on a WritableStreamDefaultController`);
}
// Helper functions for the WritableStreamDefaultWriter.
function defaultWriterBrandCheckException(name) {
    return new TypeError(`WritableStreamDefaultWriter.prototype.${name} can only be used on a WritableStreamDefaultWriter`);
}
function defaultWriterLockException(name) {
    return new TypeError('Cannot ' + name + ' a stream using a released writer');
}
function defaultWriterClosedPromiseInitialize(writer) {
    writer._closedPromise = newPromise((resolve, reject) => {
        writer._closedPromise_resolve = resolve;
        writer._closedPromise_reject = reject;
        writer._closedPromiseState = 'pending';
    });
}
function defaultWriterClosedPromiseInitializeAsRejected(writer, reason) {
    defaultWriterClosedPromiseInitialize(writer);
    defaultWriterClosedPromiseReject(writer, reason);
}
function defaultWriterClosedPromiseInitializeAsResolved(writer) {
    defaultWriterClosedPromiseInitialize(writer);
    defaultWriterClosedPromiseResolve(writer);
}
function defaultWriterClosedPromiseReject(writer, reason) {
    if (writer._closedPromise_reject === undefined) {
        return;
    }
    setPromiseIsHandledToTrue(writer._closedPromise);
    writer._closedPromise_reject(reason);
    writer._closedPromise_resolve = undefined;
    writer._closedPromise_reject = undefined;
    writer._closedPromiseState = 'rejected';
}
function defaultWriterClosedPromiseResetToRejected(writer, reason) {
    defaultWriterClosedPromiseInitializeAsRejected(writer, reason);
}
function defaultWriterClosedPromiseResolve(writer) {
    if (writer._closedPromise_resolve === undefined) {
        return;
    }
    writer._closedPromise_resolve(undefined);
    writer._closedPromise_resolve = undefined;
    writer._closedPromise_reject = undefined;
    writer._closedPromiseState = 'resolved';
}
function defaultWriterReadyPromiseInitialize(writer) {
    writer._readyPromise = newPromise((resolve, reject) => {
        writer._readyPromise_resolve = resolve;
        writer._readyPromise_reject = reject;
    });
    writer._readyPromiseState = 'pending';
}
function defaultWriterReadyPromiseInitializeAsRejected(writer, reason) {
    defaultWriterReadyPromiseInitialize(writer);
    defaultWriterReadyPromiseReject(writer, reason);
}
function defaultWriterReadyPromiseInitializeAsResolved(writer) {
    defaultWriterReadyPromiseInitialize(writer);
    defaultWriterReadyPromiseResolve(writer);
}
function defaultWriterReadyPromiseReject(writer, reason) {
    if (writer._readyPromise_reject === undefined) {
        return;
    }
    setPromiseIsHandledToTrue(writer._readyPromise);
    writer._readyPromise_reject(reason);
    writer._readyPromise_resolve = undefined;
    writer._readyPromise_reject = undefined;
    writer._readyPromiseState = 'rejected';
}
function defaultWriterReadyPromiseReset(writer) {
    defaultWriterReadyPromiseInitialize(writer);
}
function defaultWriterReadyPromiseResetToRejected(writer, reason) {
    defaultWriterReadyPromiseInitializeAsRejected(writer, reason);
}
function defaultWriterReadyPromiseResolve(writer) {
    if (writer._readyPromise_resolve === undefined) {
        return;
    }
    writer._readyPromise_resolve(undefined);
    writer._readyPromise_resolve = undefined;
    writer._readyPromise_reject = undefined;
    writer._readyPromiseState = 'fulfilled';
}
// eslint-disable-next-line no-redeclarelet DOMException$1=DOMException

function ReadableStreamPipeTo(source, dest, preventClose, preventAbort, preventCancel, signal) {
    const reader = AcquireReadableStreamDefaultReader(source);
    const writer = AcquireWritableStreamDefaultWriter(dest);
    source._disturbed = true;
    let shuttingDown = false;
    // This is used to keep track of the spec's requirement that we wait for ongoing writes during shutdown.
    let currentWrite = promiseResolvedWith(undefined);
    return newPromise((resolve, reject) => {
        let abortAlgorithm;
        if (signal !== undefined) {
            abortAlgorithm = () => {
                const error =new DOMException('Aborted', 'AbortError');
                const actions = [];
                if (!preventAbort) {
                    actions.push(() => {
                        if (dest._state === 'writable') {
                            return WritableStreamAbort(dest, error);
                        }
                        return promiseResolvedWith(undefined);
                    });
                }
                if (!preventCancel) {
                    actions.push(() => {
                        if (source._state === 'readable') {
                            return ReadableStreamCancel(source, error);
                        }
                        return promiseResolvedWith(undefined);
                    });
                }
                shutdownWithAction(() => Promise.all(actions.map(action => action())), true, error);
            };
            if (signal.aborted) {
                abortAlgorithm();
                return;
            }
            signal.addEventListener('abort', abortAlgorithm);
        }
        // Using reader and writer, read all chunks from this and write them to dest
        // - Backpressure must be enforced
        // - Shutdown must stop all activity
        function pipeLoop() {
            return newPromise((resolveLoop, rejectLoop) => {
                function next(done) {
                    if (done) {
                        resolveLoop();
                    }
                    else {
                        // Use `PerformPromiseThen` instead of `uponPromise` to avoid
                        // adding unnecessary `.catch(rethrowAssertionErrorRejection)` handlers
                        PerformPromiseThen(pipeStep(), next, rejectLoop);
                    }
                }
                next(false);
            });
        }
        function pipeStep() {
            if (shuttingDown) {
                return promiseResolvedWith(true);
            }
            return PerformPromiseThen(writer._readyPromise, () => {
                return newPromise((resolveRead, rejectRead) => {
                    ReadableStreamDefaultReaderRead(reader, {
                        _chunkSteps: chunk => {
                            currentWrite = PerformPromiseThen(WritableStreamDefaultWriterWrite(writer, chunk), undefined, noop$1);
                            resolveRead(false);
                        },
                        _closeSteps: () => resolveRead(true),
                        _errorSteps: rejectRead
                    });
                });
            });
        }
        // Errors must be propagated forward
        isOrBecomesErrored(source, reader._closedPromise, storedError => {
            if (!preventAbort) {
                shutdownWithAction(() => WritableStreamAbort(dest, storedError), true, storedError);
            }
            else {
                shutdown(true, storedError);
            }
        });
        // Errors must be propagated backward
        isOrBecomesErrored(dest, writer._closedPromise, storedError => {
            if (!preventCancel) {
                shutdownWithAction(() => ReadableStreamCancel(source, storedError), true, storedError);
            }
            else {
                shutdown(true, storedError);
            }
        });
        // Closing must be propagated forward
        isOrBecomesClosed(source, reader._closedPromise, () => {
            if (!preventClose) {
                shutdownWithAction(() => WritableStreamDefaultWriterCloseWithErrorPropagation(writer));
            }
            else {
                shutdown();
            }
        });
        // Closing must be propagated backward
        if (WritableStreamCloseQueuedOrInFlight(dest) || dest._state === 'closed') {
            const destClosed = new TypeError('the destination writable stream closed before all data could be piped to it');
            if (!preventCancel) {
                shutdownWithAction(() => ReadableStreamCancel(source, destClosed), true, destClosed);
            }
            else {
                shutdown(true, destClosed);
            }
        }
        setPromiseIsHandledToTrue(pipeLoop());
        function waitForWritesToFinish() {
            // Another write may have started while we were waiting on this currentWrite, so we have to be sure to wait
            // for that too.
            const oldCurrentWrite = currentWrite;
            return PerformPromiseThen(currentWrite, () => oldCurrentWrite !== currentWrite ? waitForWritesToFinish() : undefined);
        }
        function isOrBecomesErrored(stream, promise, action) {
            if (stream._state === 'errored') {
                action(stream._storedError);
            }
            else {
                uponRejection(promise, action);
            }
        }
        function isOrBecomesClosed(stream, promise, action) {
            if (stream._state === 'closed') {
                action();
            }
            else {
                uponFulfillment(promise, action);
            }
        }
        function shutdownWithAction(action, originalIsError, originalError) {
            if (shuttingDown) {
                return;
            }
            shuttingDown = true;
            if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {
                uponFulfillment(waitForWritesToFinish(), doTheRest);
            }
            else {
                doTheRest();
            }
            function doTheRest() {
                uponPromise(action(), () => finalize(originalIsError, originalError), newError => finalize(true, newError));
            }
        }
        function shutdown(isError, error) {
            if (shuttingDown) {
                return;
            }
            shuttingDown = true;
            if (dest._state === 'writable' && !WritableStreamCloseQueuedOrInFlight(dest)) {
                uponFulfillment(waitForWritesToFinish(), () => finalize(isError, error));
            }
            else {
                finalize(isError, error);
            }
        }
        function finalize(isError, error) {
            WritableStreamDefaultWriterRelease(writer);
            ReadableStreamReaderGenericRelease(reader);
            if (signal !== undefined) {
                signal.removeEventListener('abort', abortAlgorithm);
            }
            if (isError) {
                reject(error);
            }
            else {
                resolve(undefined);
            }
        }
    });
}

/**
 * Allows control of a {@link ReadableStream | readable stream}'s state and internal queue.
 *
 * @public
 */
class ReadableStreamDefaultController {
    constructor() {
        throw new TypeError('Illegal constructor');
    }
    /**
     * Returns the desired size to fill the controlled stream's internal queue. It can be negative, if the queue is
     * over-full. An underlying source ought to use this information to determine when and how to apply backpressure.
     */
    get desiredSize() {
        if (!IsReadableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$1('desiredSize');
        }
        return ReadableStreamDefaultControllerGetDesiredSize(this);
    }
    /**
     * Closes the controlled readable stream. Consumers will still be able to read any previously-enqueued chunks from
     * the stream, but once those are read, the stream will become closed.
     */
    close() {
        if (!IsReadableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$1('close');
        }
        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {
            throw new TypeError('The stream is not in a state that permits close');
        }
        ReadableStreamDefaultControllerClose(this);
    }
    enqueue(chunk = undefined) {
        if (!IsReadableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$1('enqueue');
        }
        if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(this)) {
            throw new TypeError('The stream is not in a state that permits enqueue');
        }
        return ReadableStreamDefaultControllerEnqueue(this, chunk);
    }
    /**
     * Errors the controlled readable stream, making all future interactions with it fail with the given error `e`.
     */
    error(e = undefined) {
        if (!IsReadableStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException$1('error');
        }
        ReadableStreamDefaultControllerError(this, e);
    }
    /** @internal */
    [CancelSteps](reason) {
        ResetQueue(this);
        const result = this._cancelAlgorithm(reason);
        ReadableStreamDefaultControllerClearAlgorithms(this);
        return result;
    }
    /** @internal */
    [PullSteps](readRequest) {
        const stream = this._controlledReadableStream;
        if (this._queue.length > 0) {
            const chunk = DequeueValue(this);
            if (this._closeRequested && this._queue.length === 0) {
                ReadableStreamDefaultControllerClearAlgorithms(this);
                ReadableStreamClose(stream);
            }
            else {
                ReadableStreamDefaultControllerCallPullIfNeeded(this);
            }
            readRequest._chunkSteps(chunk);
        }
        else {
            ReadableStreamAddReadRequest(stream, readRequest);
            ReadableStreamDefaultControllerCallPullIfNeeded(this);
        }
    }
}
Object.defineProperties(ReadableStreamDefaultController.prototype, {
    close: { enumerable: true },
    enqueue: { enumerable: true },
    error: { enumerable: true },
    desiredSize: { enumerable: true }
});
// Abstract operations for the ReadableStreamDefaultController.
function IsReadableStreamDefaultController(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_controlledReadableStream')) {
        return false;
    }
    return x instanceof ReadableStreamDefaultController;
}
function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {
    const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);
    if (!shouldPull) {
        return;
    }
    if (controller._pulling) {
        controller._pullAgain = true;
        return;
    }
    controller._pulling = true;
    const pullPromise = controller._pullAlgorithm();
    uponPromise(pullPromise, () => {
        controller._pulling = false;
        if (controller._pullAgain) {
            controller._pullAgain = false;
            ReadableStreamDefaultControllerCallPullIfNeeded(controller);
        }
    }, e => {
        ReadableStreamDefaultControllerError(controller, e);
    });
}
function ReadableStreamDefaultControllerShouldCallPull(controller) {
    const stream = controller._controlledReadableStream;
    if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
        return false;
    }
    if (!controller._started) {
        return false;
    }
    if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
        return true;
    }
    const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);
    if (desiredSize > 0) {
        return true;
    }
    return false;
}
function ReadableStreamDefaultControllerClearAlgorithms(controller) {
    controller._pullAlgorithm = undefined;
    controller._cancelAlgorithm = undefined;
    controller._strategySizeAlgorithm = undefined;
}
// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.
function ReadableStreamDefaultControllerClose(controller) {
    if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
        return;
    }
    const stream = controller._controlledReadableStream;
    controller._closeRequested = true;
    if (controller._queue.length === 0) {
        ReadableStreamDefaultControllerClearAlgorithms(controller);
        ReadableStreamClose(stream);
    }
}
function ReadableStreamDefaultControllerEnqueue(controller, chunk) {
    if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {
        return;
    }
    const stream = controller._controlledReadableStream;
    if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {
        ReadableStreamFulfillReadRequest(stream, chunk, false);
    }
    else {
        let chunkSize;
        try {
            chunkSize = controller._strategySizeAlgorithm(chunk);
        }
        catch (chunkSizeE) {
            ReadableStreamDefaultControllerError(controller, chunkSizeE);
            throw chunkSizeE;
        }
        try {
            EnqueueValueWithSize(controller, chunk, chunkSize);
        }
        catch (enqueueE) {
            ReadableStreamDefaultControllerError(controller, enqueueE);
            throw enqueueE;
        }
    }
    ReadableStreamDefaultControllerCallPullIfNeeded(controller);
}
function ReadableStreamDefaultControllerError(controller, e) {
    const stream = controller._controlledReadableStream;
    if (stream._state !== 'readable') {
        return;
    }
    ResetQueue(controller);
    ReadableStreamDefaultControllerClearAlgorithms(controller);
    ReadableStreamError(stream, e);
}
function ReadableStreamDefaultControllerGetDesiredSize(controller) {
    const state = controller._controlledReadableStream._state;
    if (state === 'errored') {
        return null;
    }
    if (state === 'closed') {
        return 0;
    }
    return controller._strategyHWM - controller._queueTotalSize;
}
// This is used in the implementation of TransformStream.
function ReadableStreamDefaultControllerHasBackpressure(controller) {
    if (ReadableStreamDefaultControllerShouldCallPull(controller)) {
        return false;
    }
    return true;
}
function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) {
    const state = controller._controlledReadableStream._state;
    if (!controller._closeRequested && state === 'readable') {
        return true;
    }
    return false;
}
function SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm) {
    controller._controlledReadableStream = stream;
    controller._queue = undefined;
    controller._queueTotalSize = undefined;
    ResetQueue(controller);
    controller._started = false;
    controller._closeRequested = false;
    controller._pullAgain = false;
    controller._pulling = false;
    controller._strategySizeAlgorithm = sizeAlgorithm;
    controller._strategyHWM = highWaterMark;
    controller._pullAlgorithm = pullAlgorithm;
    controller._cancelAlgorithm = cancelAlgorithm;
    stream._readableStreamController = controller;
    const startResult = startAlgorithm();
    uponPromise(promiseResolvedWith(startResult), () => {
        controller._started = true;
        ReadableStreamDefaultControllerCallPullIfNeeded(controller);
    }, r => {
        ReadableStreamDefaultControllerError(controller, r);
    });
}
function SetUpReadableStreamDefaultControllerFromUnderlyingSource(stream, underlyingSource, highWaterMark, sizeAlgorithm) {
    const controller = Object.create(ReadableStreamDefaultController.prototype);
    let startAlgorithm = () => undefined;
    let pullAlgorithm = () => promiseResolvedWith(undefined);
    let cancelAlgorithm = () => promiseResolvedWith(undefined);
    if (underlyingSource.start !== undefined) {
        startAlgorithm = () => underlyingSource.start(controller);
    }
    if (underlyingSource.pull !== undefined) {
        pullAlgorithm = () => underlyingSource.pull(controller);
    }
    if (underlyingSource.cancel !== undefined) {
        cancelAlgorithm = reason => underlyingSource.cancel(reason);
    }
    SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);
}
// Helper functions for the ReadableStreamDefaultController.
function defaultControllerBrandCheckException$1(name) {
    return new TypeError(`ReadableStreamDefaultController.prototype.${name} can only be used on a ReadableStreamDefaultController`);
}

function ReadableStreamTee(stream, cloneForBranch2) {
    if (IsReadableByteStreamController(stream._readableStreamController)) {
        return ReadableByteStreamTee(stream);
    }
    return ReadableStreamDefaultTee(stream);
}
function ReadableStreamDefaultTee(stream, cloneForBranch2) {
    const reader = AcquireReadableStreamDefaultReader(stream);
    let reading = false;
    let readAgain = false;
    let canceled1 = false;
    let canceled2 = false;
    let reason1;
    let reason2;
    let branch1;
    let branch2;
    let resolveCancelPromise;
    const cancelPromise = newPromise(resolve => {
        resolveCancelPromise = resolve;
    });
    function pullAlgorithm() {
        if (reading) {
            readAgain = true;
            return promiseResolvedWith(undefined);
        }
        reading = true;
        const readRequest = {
            _chunkSteps: chunk => {
                // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
                // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
                // successful synchronously-available reads get ahead of asynchronously-available errors.
                queueMicrotask(() => {
                    readAgain = false;
                    const chunk1 = chunk;
                    const chunk2 = chunk;
                    // There is no way to access the cloning code right now in the reference implementation.
                    // If we add one then we'll need an implementation for serializable objects.
                    // if (!canceled2 && cloneForBranch2) {
                    //   chunk2 = StructuredDeserialize(StructuredSerialize(chunk2));
                    // }
                    if (!canceled1) {
                        ReadableStreamDefaultControllerEnqueue(branch1._readableStreamController, chunk1);
                    }
                    if (!canceled2) {
                        ReadableStreamDefaultControllerEnqueue(branch2._readableStreamController, chunk2);
                    }
                    reading = false;
                    if (readAgain) {
                        pullAlgorithm();
                    }
                });
            },
            _closeSteps: () => {
                reading = false;
                if (!canceled1) {
                    ReadableStreamDefaultControllerClose(branch1._readableStreamController);
                }
                if (!canceled2) {
                    ReadableStreamDefaultControllerClose(branch2._readableStreamController);
                }
                if (!canceled1 || !canceled2) {
                    resolveCancelPromise(undefined);
                }
            },
            _errorSteps: () => {
                reading = false;
            }
        };
        ReadableStreamDefaultReaderRead(reader, readRequest);
        return promiseResolvedWith(undefined);
    }
    function cancel1Algorithm(reason) {
        canceled1 = true;
        reason1 = reason;
        if (canceled2) {
            const compositeReason = CreateArrayFromList([reason1, reason2]);
            const cancelResult = ReadableStreamCancel(stream, compositeReason);
            resolveCancelPromise(cancelResult);
        }
        return cancelPromise;
    }
    function cancel2Algorithm(reason) {
        canceled2 = true;
        reason2 = reason;
        if (canceled1) {
            const compositeReason = CreateArrayFromList([reason1, reason2]);
            const cancelResult = ReadableStreamCancel(stream, compositeReason);
            resolveCancelPromise(cancelResult);
        }
        return cancelPromise;
    }
    function startAlgorithm() {
        // do nothing
    }
    branch1 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel1Algorithm);
    branch2 = CreateReadableStream(startAlgorithm, pullAlgorithm, cancel2Algorithm);
    uponRejection(reader._closedPromise, (r) => {
        ReadableStreamDefaultControllerError(branch1._readableStreamController, r);
        ReadableStreamDefaultControllerError(branch2._readableStreamController, r);
        if (!canceled1 || !canceled2) {
            resolveCancelPromise(undefined);
        }
    });
    return [branch1, branch2];
}
function ReadableByteStreamTee(stream) {
    let reader = AcquireReadableStreamDefaultReader(stream);
    let reading = false;
    let readAgainForBranch1 = false;
    let readAgainForBranch2 = false;
    let canceled1 = false;
    let canceled2 = false;
    let reason1;
    let reason2;
    let branch1;
    let branch2;
    let resolveCancelPromise;
    const cancelPromise = newPromise(resolve => {
        resolveCancelPromise = resolve;
    });
    function forwardReaderError(thisReader) {
        uponRejection(thisReader._closedPromise, r => {
            if (thisReader !== reader) {
                return;
            }
            ReadableByteStreamControllerError(branch1._readableStreamController, r);
            ReadableByteStreamControllerError(branch2._readableStreamController, r);
            if (!canceled1 || !canceled2) {
                resolveCancelPromise(undefined);
            }
        });
    }
    function pullWithDefaultReader() {
        if (IsReadableStreamBYOBReader(reader)) {
            ReadableStreamReaderGenericRelease(reader);
            reader = AcquireReadableStreamDefaultReader(stream);
            forwardReaderError(reader);
        }
        const readRequest = {
            _chunkSteps: chunk => {
                // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
                // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
                // successful synchronously-available reads get ahead of asynchronously-available errors.
                queueMicrotask(() => {
                    readAgainForBranch1 = false;
                    readAgainForBranch2 = false;
                    const chunk1 = chunk;
                    let chunk2 = chunk;
                    if (!canceled1 && !canceled2) {
                        try {
                            chunk2 = CloneAsUint8Array(chunk);
                        }
                        catch (cloneE) {
                            ReadableByteStreamControllerError(branch1._readableStreamController, cloneE);
                            ReadableByteStreamControllerError(branch2._readableStreamController, cloneE);
                            resolveCancelPromise(ReadableStreamCancel(stream, cloneE));
                            return;
                        }
                    }
                    if (!canceled1) {
                        ReadableByteStreamControllerEnqueue(branch1._readableStreamController, chunk1);
                    }
                    if (!canceled2) {
                        ReadableByteStreamControllerEnqueue(branch2._readableStreamController, chunk2);
                    }
                    reading = false;
                    if (readAgainForBranch1) {
                        pull1Algorithm();
                    }
                    else if (readAgainForBranch2) {
                        pull2Algorithm();
                    }
                });
            },
            _closeSteps: () => {
                reading = false;
                if (!canceled1) {
                    ReadableByteStreamControllerClose(branch1._readableStreamController);
                }
                if (!canceled2) {
                    ReadableByteStreamControllerClose(branch2._readableStreamController);
                }
                if (branch1._readableStreamController._pendingPullIntos.length > 0) {
                    ReadableByteStreamControllerRespond(branch1._readableStreamController, 0);
                }
                if (branch2._readableStreamController._pendingPullIntos.length > 0) {
                    ReadableByteStreamControllerRespond(branch2._readableStreamController, 0);
                }
                if (!canceled1 || !canceled2) {
                    resolveCancelPromise(undefined);
                }
            },
            _errorSteps: () => {
                reading = false;
            }
        };
        ReadableStreamDefaultReaderRead(reader, readRequest);
    }
    function pullWithBYOBReader(view, forBranch2) {
        if (IsReadableStreamDefaultReader(reader)) {
            ReadableStreamReaderGenericRelease(reader);
            reader = AcquireReadableStreamBYOBReader(stream);
            forwardReaderError(reader);
        }
        const byobBranch = forBranch2 ? branch2 : branch1;
        const otherBranch = forBranch2 ? branch1 : branch2;
        const readIntoRequest = {
            _chunkSteps: chunk => {
                // This needs to be delayed a microtask because it takes at least a microtask to detect errors (using
                // reader._closedPromise below), and we want errors in stream to error both branches immediately. We cannot let
                // successful synchronously-available reads get ahead of asynchronously-available errors.
                queueMicrotask(() => {
                    readAgainForBranch1 = false;
                    readAgainForBranch2 = false;
                    const byobCanceled = forBranch2 ? canceled2 : canceled1;
                    const otherCanceled = forBranch2 ? canceled1 : canceled2;
                    if (!otherCanceled) {
                        let clonedChunk;
                        try {
                            clonedChunk = CloneAsUint8Array(chunk);
                        }
                        catch (cloneE) {
                            ReadableByteStreamControllerError(byobBranch._readableStreamController, cloneE);
                            ReadableByteStreamControllerError(otherBranch._readableStreamController, cloneE);
                            resolveCancelPromise(ReadableStreamCancel(stream, cloneE));
                            return;
                        }
                        if (!byobCanceled) {
                            ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
                        }
                        ReadableByteStreamControllerEnqueue(otherBranch._readableStreamController, clonedChunk);
                    }
                    else if (!byobCanceled) {
                        ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
                    }
                    reading = false;
                    if (readAgainForBranch1) {
                        pull1Algorithm();
                    }
                    else if (readAgainForBranch2) {
                        pull2Algorithm();
                    }
                });
            },
            _closeSteps: chunk => {
                reading = false;
                const byobCanceled = forBranch2 ? canceled2 : canceled1;
                const otherCanceled = forBranch2 ? canceled1 : canceled2;
                if (!byobCanceled) {
                    ReadableByteStreamControllerClose(byobBranch._readableStreamController);
                }
                if (!otherCanceled) {
                    ReadableByteStreamControllerClose(otherBranch._readableStreamController);
                }
                if (chunk !== undefined) {
                    if (!byobCanceled) {
                        ReadableByteStreamControllerRespondWithNewView(byobBranch._readableStreamController, chunk);
                    }
                    if (!otherCanceled && otherBranch._readableStreamController._pendingPullIntos.length > 0) {
                        ReadableByteStreamControllerRespond(otherBranch._readableStreamController, 0);
                    }
                }
                if (!byobCanceled || !otherCanceled) {
                    resolveCancelPromise(undefined);
                }
            },
            _errorSteps: () => {
                reading = false;
            }
        };
        ReadableStreamBYOBReaderRead(reader, view, readIntoRequest);
    }
    function pull1Algorithm() {
        if (reading) {
            readAgainForBranch1 = true;
            return promiseResolvedWith(undefined);
        }
        reading = true;
        const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch1._readableStreamController);
        if (byobRequest === null) {
            pullWithDefaultReader();
        }
        else {
            pullWithBYOBReader(byobRequest._view, false);
        }
        return promiseResolvedWith(undefined);
    }
    function pull2Algorithm() {
        if (reading) {
            readAgainForBranch2 = true;
            return promiseResolvedWith(undefined);
        }
        reading = true;
        const byobRequest = ReadableByteStreamControllerGetBYOBRequest(branch2._readableStreamController);
        if (byobRequest === null) {
            pullWithDefaultReader();
        }
        else {
            pullWithBYOBReader(byobRequest._view, true);
        }
        return promiseResolvedWith(undefined);
    }
    function cancel1Algorithm(reason) {
        canceled1 = true;
        reason1 = reason;
        if (canceled2) {
            const compositeReason = CreateArrayFromList([reason1, reason2]);
            const cancelResult = ReadableStreamCancel(stream, compositeReason);
            resolveCancelPromise(cancelResult);
        }
        return cancelPromise;
    }
    function cancel2Algorithm(reason) {
        canceled2 = true;
        reason2 = reason;
        if (canceled1) {
            const compositeReason = CreateArrayFromList([reason1, reason2]);
            const cancelResult = ReadableStreamCancel(stream, compositeReason);
            resolveCancelPromise(cancelResult);
        }
        return cancelPromise;
    }
    function startAlgorithm() {
        return;
    }
    branch1 = CreateReadableByteStream(startAlgorithm, pull1Algorithm, cancel1Algorithm);
    branch2 = CreateReadableByteStream(startAlgorithm, pull2Algorithm, cancel2Algorithm);
    forwardReaderError(reader);
    return [branch1, branch2];
}

function convertUnderlyingDefaultOrByteSource(source, context) {
    assertDictionary(source, context);
    const original = source;
    const autoAllocateChunkSize = original === null || original === void 0 ? void 0 : original.autoAllocateChunkSize;
    const cancel = original === null || original === void 0 ? void 0 : original.cancel;
    const pull = original === null || original === void 0 ? void 0 : original.pull;
    const start = original === null || original === void 0 ? void 0 : original.start;
    const type = original === null || original === void 0 ? void 0 : original.type;
    return {
        autoAllocateChunkSize: autoAllocateChunkSize === undefined ?
            undefined :
            convertUnsignedLongLongWithEnforceRange(autoAllocateChunkSize, `${context} has member 'autoAllocateChunkSize' that`),
        cancel: cancel === undefined ?
            undefined :
            convertUnderlyingSourceCancelCallback(cancel, original, `${context} has member 'cancel' that`),
        pull: pull === undefined ?
            undefined :
            convertUnderlyingSourcePullCallback(pull, original, `${context} has member 'pull' that`),
        start: start === undefined ?
            undefined :
            convertUnderlyingSourceStartCallback(start, original, `${context} has member 'start' that`),
        type: type === undefined ? undefined : convertReadableStreamType(type, `${context} has member 'type' that`)
    };
}
function convertUnderlyingSourceCancelCallback(fn, original, context) {
    assertFunction(fn, context);
    return (reason) => promiseCall(fn, original, [reason]);
}
function convertUnderlyingSourcePullCallback(fn, original, context) {
    assertFunction(fn, context);
    return (controller) => promiseCall(fn, original, [controller]);
}
function convertUnderlyingSourceStartCallback(fn, original, context) {
    assertFunction(fn, context);
    return (controller) => reflectCall(fn, original, [controller]);
}
function convertReadableStreamType(type, context) {
    type = `${type}`;
    if (type !== 'bytes') {
        throw new TypeError(`${context} '${type}' is not a valid enumeration value for ReadableStreamType`);
    }
    return type;
}

function convertReaderOptions(options, context) {
    assertDictionary(options, context);
    const mode = options === null || options === void 0 ? void 0 : options.mode;
    return {
        mode: mode === undefined ? undefined : convertReadableStreamReaderMode(mode, `${context} has member 'mode' that`)
    };
}
function convertReadableStreamReaderMode(mode, context) {
    mode = `${mode}`;
    if (mode !== 'byob') {
        throw new TypeError(`${context} '${mode}' is not a valid enumeration value for ReadableStreamReaderMode`);
    }
    return mode;
}

function convertIteratorOptions(options, context) {
    assertDictionary(options, context);
    const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;
    return { preventCancel: Boolean(preventCancel) };
}

function convertPipeOptions(options, context) {
    assertDictionary(options, context);
    const preventAbort = options === null || options === void 0 ? void 0 : options.preventAbort;
    const preventCancel = options === null || options === void 0 ? void 0 : options.preventCancel;
    const preventClose = options === null || options === void 0 ? void 0 : options.preventClose;
    const signal = options === null || options === void 0 ? void 0 : options.signal;
    if (signal !== undefined) {
        assertAbortSignal(signal, `${context} has member 'signal' that`);
    }
    return {
        preventAbort: Boolean(preventAbort),
        preventCancel: Boolean(preventCancel),
        preventClose: Boolean(preventClose),
        signal
    };
}
function assertAbortSignal(signal, context) {
    if (!isAbortSignal$1(signal)) {
        throw new TypeError(`${context} is not an AbortSignal.`);
    }
}

function convertReadableWritablePair(pair, context) {
    assertDictionary(pair, context);
    const readable = pair === null || pair === void 0 ? void 0 : pair.readable;
    assertRequiredField(readable, 'readable', 'ReadableWritablePair');
    assertReadableStream(readable, `${context} has member 'readable' that`);
    const writable = pair === null || pair === void 0 ? void 0 : pair.writable;
    assertRequiredField(writable, 'writable', 'ReadableWritablePair');
    assertWritableStream(writable, `${context} has member 'writable' that`);
    return { readable, writable };
}

/**
 * A readable stream represents a source of data, from which you can read.
 *
 * @public
 */
class ReadableStream {
    constructor(rawUnderlyingSource = {}, rawStrategy = {}) {
        if (rawUnderlyingSource === undefined) {
            rawUnderlyingSource = null;
        }
        else {
            assertObject(rawUnderlyingSource, 'First parameter');
        }
        const strategy = convertQueuingStrategy(rawStrategy, 'Second parameter');
        const underlyingSource = convertUnderlyingDefaultOrByteSource(rawUnderlyingSource, 'First parameter');
        InitializeReadableStream(this);
        if (underlyingSource.type === 'bytes') {
            if (strategy.size !== undefined) {
                throw new RangeError('The strategy for a byte stream cannot have a size function');
            }
            const highWaterMark = ExtractHighWaterMark(strategy, 0);
            SetUpReadableByteStreamControllerFromUnderlyingSource(this, underlyingSource, highWaterMark);
        }
        else {
            const sizeAlgorithm = ExtractSizeAlgorithm(strategy);
            const highWaterMark = ExtractHighWaterMark(strategy, 1);
            SetUpReadableStreamDefaultControllerFromUnderlyingSource(this, underlyingSource, highWaterMark, sizeAlgorithm);
        }
    }
    /**
     * Whether or not the readable stream is locked to a {@link ReadableStreamDefaultReader | reader}.
     */
    get locked() {
        if (!IsReadableStream(this)) {
            throw streamBrandCheckException$1('locked');
        }
        return IsReadableStreamLocked(this);
    }
    /**
     * Cancels the stream, signaling a loss of interest in the stream by a consumer.
     *
     * The supplied `reason` argument will be given to the underlying source's {@link UnderlyingSource.cancel | cancel()}
     * method, which might or might not use it.
     */
    cancel(reason = undefined) {
        if (!IsReadableStream(this)) {
            return promiseRejectedWith(streamBrandCheckException$1('cancel'));
        }
        if (IsReadableStreamLocked(this)) {
            return promiseRejectedWith(new TypeError('Cannot cancel a stream that already has a reader'));
        }
        return ReadableStreamCancel(this, reason);
    }
    getReader(rawOptions = undefined) {
        if (!IsReadableStream(this)) {
            throw streamBrandCheckException$1('getReader');
        }
        const options = convertReaderOptions(rawOptions, 'First parameter');
        if (options.mode === undefined) {
            return AcquireReadableStreamDefaultReader(this);
        }
        return AcquireReadableStreamBYOBReader(this);
    }
    pipeThrough(rawTransform, rawOptions = {}) {
        if (!IsReadableStream(this)) {
            throw streamBrandCheckException$1('pipeThrough');
        }
        assertRequiredArgument(rawTransform, 1, 'pipeThrough');
        const transform = convertReadableWritablePair(rawTransform, 'First parameter');
        const options = convertPipeOptions(rawOptions, 'Second parameter');
        if (IsReadableStreamLocked(this)) {
            throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked ReadableStream');
        }
        if (IsWritableStreamLocked(transform.writable)) {
            throw new TypeError('ReadableStream.prototype.pipeThrough cannot be used on a locked WritableStream');
        }
        const promise = ReadableStreamPipeTo(this, transform.writable, options.preventClose, options.preventAbort, options.preventCancel, options.signal);
        setPromiseIsHandledToTrue(promise);
        return transform.readable;
    }
    pipeTo(destination, rawOptions = {}) {
        if (!IsReadableStream(this)) {
            return promiseRejectedWith(streamBrandCheckException$1('pipeTo'));
        }
        if (destination === undefined) {
            return promiseRejectedWith(`Parameter 1 is required in 'pipeTo'.`);
        }
        if (!IsWritableStream(destination)) {
            return promiseRejectedWith(new TypeError(`ReadableStream.prototype.pipeTo's first argument must be a WritableStream`));
        }
        let options;
        try {
            options = convertPipeOptions(rawOptions, 'Second parameter');
        }
        catch (e) {
            return promiseRejectedWith(e);
        }
        if (IsReadableStreamLocked(this)) {
            return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked ReadableStream'));
        }
        if (IsWritableStreamLocked(destination)) {
            return promiseRejectedWith(new TypeError('ReadableStream.prototype.pipeTo cannot be used on a locked WritableStream'));
        }
        return ReadableStreamPipeTo(this, destination, options.preventClose, options.preventAbort, options.preventCancel, options.signal);
    }
    /**
     * Tees this readable stream, returning a two-element array containing the two resulting branches as
     * new {@link ReadableStream} instances.
     *
     * Teeing a stream will lock it, preventing any other consumer from acquiring a reader.
     * To cancel the stream, cancel both of the resulting branches; a composite cancellation reason will then be
     * propagated to the stream's underlying source.
     *
     * Note that the chunks seen in each branch will be the same object. If the chunks are not immutable,
     * this could allow interference between the two branches.
     */
    tee() {
        if (!IsReadableStream(this)) {
            throw streamBrandCheckException$1('tee');
        }
        const branches = ReadableStreamTee(this);
        return CreateArrayFromList(branches);
    }
    values(rawOptions = undefined) {
        if (!IsReadableStream(this)) {
            throw streamBrandCheckException$1('values');
        }
        const options = convertIteratorOptions(rawOptions, 'First parameter');
        return AcquireReadableStreamAsyncIterator(this, options.preventCancel);
    }
}
Object.defineProperties(ReadableStream.prototype, {
    cancel: { enumerable: true },
    getReader: { enumerable: true },
    pipeThrough: { enumerable: true },
    pipeTo: { enumerable: true },
    tee: { enumerable: true },
    values: { enumerable: true },
    locked: { enumerable: true }
});
// Abstract operations for the ReadableStream.
// Throws if and only if startAlgorithm throws.
function CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark = 1, sizeAlgorithm = () => 1) {
    const stream = Object.create(ReadableStream.prototype);
    InitializeReadableStream(stream);
    const controller = Object.create(ReadableStreamDefaultController.prototype);
    SetUpReadableStreamDefaultController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, highWaterMark, sizeAlgorithm);
    return stream;
}
// Throws if and only if startAlgorithm throws.
function CreateReadableByteStream(startAlgorithm, pullAlgorithm, cancelAlgorithm) {
    const stream = Object.create(ReadableStream.prototype);
    InitializeReadableStream(stream);
    const controller = Object.create(ReadableByteStreamController.prototype);
    SetUpReadableByteStreamController(stream, controller, startAlgorithm, pullAlgorithm, cancelAlgorithm, 0, undefined);
    return stream;
}
function InitializeReadableStream(stream) {
    stream._state = 'readable';
    stream._reader = undefined;
    stream._storedError = undefined;
    stream._disturbed = false;
}
function IsReadableStream(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_readableStreamController')) {
        return false;
    }
    return x instanceof ReadableStream;
}
function IsReadableStreamLocked(stream) {
    if (stream._reader === undefined) {
        return false;
    }
    return true;
}
// ReadableStream API exposed for controllers.
function ReadableStreamCancel(stream, reason) {
    stream._disturbed = true;
    if (stream._state === 'closed') {
        return promiseResolvedWith(undefined);
    }
    if (stream._state === 'errored') {
        return promiseRejectedWith(stream._storedError);
    }
    ReadableStreamClose(stream);
    const reader = stream._reader;
    if (reader !== undefined && IsReadableStreamBYOBReader(reader)) {
        reader._readIntoRequests.forEach(readIntoRequest => {
            readIntoRequest._closeSteps(undefined);
        });
        reader._readIntoRequests = new SimpleQueue();
    }
    const sourceCancelPromise = stream._readableStreamController[CancelSteps](reason);
    return transformPromiseWith(sourceCancelPromise, noop$1);
}
function ReadableStreamClose(stream) {
    stream._state = 'closed';
    const reader = stream._reader;
    if (reader === undefined) {
        return;
    }
    defaultReaderClosedPromiseResolve(reader);
    if (IsReadableStreamDefaultReader(reader)) {
        reader._readRequests.forEach(readRequest => {
            readRequest._closeSteps();
        });
        reader._readRequests = new SimpleQueue();
    }
}
function ReadableStreamError(stream, e) {
    stream._state = 'errored';
    stream._storedError = e;
    const reader = stream._reader;
    if (reader === undefined) {
        return;
    }
    defaultReaderClosedPromiseReject(reader, e);
    if (IsReadableStreamDefaultReader(reader)) {
        reader._readRequests.forEach(readRequest => {
            readRequest._errorSteps(e);
        });
        reader._readRequests = new SimpleQueue();
    }
    else {
        reader._readIntoRequests.forEach(readIntoRequest => {
            readIntoRequest._errorSteps(e);
        });
        reader._readIntoRequests = new SimpleQueue();
    }
}
// Helper functions for the ReadableStream.
function streamBrandCheckException$1(name) {
    return new TypeError(`ReadableStream.prototype.${name} can only be used on a ReadableStream`);
}

function convertQueuingStrategyInit(init, context) {
    assertDictionary(init, context);
    const highWaterMark = init === null || init === void 0 ? void 0 : init.highWaterMark;
    assertRequiredField(highWaterMark, 'highWaterMark', 'QueuingStrategyInit');
    return {
        highWaterMark: convertUnrestrictedDouble(highWaterMark)
    };
}

// The size function must not have a prototype property nor be a constructor
const byteLengthSizeFunction = (chunk) => {
    return chunk.byteLength;
};
Object.defineProperty(byteLengthSizeFunction, 'name', {
    value: 'size',
    configurable: true
});
/**
 * A queuing strategy that counts the number of bytes in each chunk.
 *
 * @public
 */
class ByteLengthQueuingStrategy {
    constructor(options) {
        assertRequiredArgument(options, 1, 'ByteLengthQueuingStrategy');
        options = convertQueuingStrategyInit(options, 'First parameter');
        this._byteLengthQueuingStrategyHighWaterMark = options.highWaterMark;
    }
    /**
     * Returns the high water mark provided to the constructor.
     */
    get highWaterMark() {
        if (!IsByteLengthQueuingStrategy(this)) {
            throw byteLengthBrandCheckException('highWaterMark');
        }
        return this._byteLengthQueuingStrategyHighWaterMark;
    }
    /**
     * Measures the size of `chunk` by returning the value of its `byteLength` property.
     */
    get size() {
        if (!IsByteLengthQueuingStrategy(this)) {
            throw byteLengthBrandCheckException('size');
        }
        return byteLengthSizeFunction;
    }
}
Object.defineProperties(ByteLengthQueuingStrategy.prototype, {
    highWaterMark: { enumerable: true },
    size: { enumerable: true }
});
// Helper functions for the ByteLengthQueuingStrategy.
function byteLengthBrandCheckException(name) {
    return new TypeError(`ByteLengthQueuingStrategy.prototype.${name} can only be used on a ByteLengthQueuingStrategy`);
}
function IsByteLengthQueuingStrategy(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_byteLengthQueuingStrategyHighWaterMark')) {
        return false;
    }
    return x instanceof ByteLengthQueuingStrategy;
}

// The size function must not have a prototype property nor be a constructor
const countSizeFunction = () => {
    return 1;
};
Object.defineProperty(countSizeFunction, 'name', {
    value: 'size',
    configurable: true
});
/**
 * A queuing strategy that counts the number of chunks.
 *
 * @public
 */
class CountQueuingStrategy {
    constructor(options) {
        assertRequiredArgument(options, 1, 'CountQueuingStrategy');
        options = convertQueuingStrategyInit(options, 'First parameter');
        this._countQueuingStrategyHighWaterMark = options.highWaterMark;
    }
    /**
     * Returns the high water mark provided to the constructor.
     */
    get highWaterMark() {
        if (!IsCountQueuingStrategy(this)) {
            throw countBrandCheckException('highWaterMark');
        }
        return this._countQueuingStrategyHighWaterMark;
    }
    /**
     * Measures the size of `chunk` by always returning 1.
     * This ensures that the total queue size is a count of the number of chunks in the queue.
     */
    get size() {
        if (!IsCountQueuingStrategy(this)) {
            throw countBrandCheckException('size');
        }
        return countSizeFunction;
    }
}
Object.defineProperties(CountQueuingStrategy.prototype, {
    highWaterMark: { enumerable: true },
    size: { enumerable: true }
});
// Helper functions for the CountQueuingStrategy.
function countBrandCheckException(name) {
    return new TypeError(`CountQueuingStrategy.prototype.${name} can only be used on a CountQueuingStrategy`);
}
function IsCountQueuingStrategy(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_countQueuingStrategyHighWaterMark')) {
        return false;
    }
    return x instanceof CountQueuingStrategy;
}

function convertTransformer(original, context) {
    assertDictionary(original, context);
    const flush = original === null || original === void 0 ? void 0 : original.flush;
    const readableType = original === null || original === void 0 ? void 0 : original.readableType;
    const start = original === null || original === void 0 ? void 0 : original.start;
    const transform = original === null || original === void 0 ? void 0 : original.transform;
    const writableType = original === null || original === void 0 ? void 0 : original.writableType;
    return {
        flush: flush === undefined ?
            undefined :
            convertTransformerFlushCallback(flush, original, `${context} has member 'flush' that`),
        readableType,
        start: start === undefined ?
            undefined :
            convertTransformerStartCallback(start, original, `${context} has member 'start' that`),
        transform: transform === undefined ?
            undefined :
            convertTransformerTransformCallback(transform, original, `${context} has member 'transform' that`),
        writableType
    };
}
function convertTransformerFlushCallback(fn, original, context) {
    assertFunction(fn, context);
    return (controller) => promiseCall(fn, original, [controller]);
}
function convertTransformerStartCallback(fn, original, context) {
    assertFunction(fn, context);
    return (controller) => reflectCall(fn, original, [controller]);
}
function convertTransformerTransformCallback(fn, original, context) {
    assertFunction(fn, context);
    return (chunk, controller) => promiseCall(fn, original, [chunk, controller]);
}

// Class TransformStream
/**
 * A transform stream consists of a pair of streams: a {@link WritableStream | writable stream},
 * known as its writable side, and a {@link ReadableStream | readable stream}, known as its readable side.
 * In a manner specific to the transform stream in question, writes to the writable side result in new data being
 * made available for reading from the readable side.
 *
 * @public
 */
class TransformStream {
    constructor(rawTransformer = {}, rawWritableStrategy = {}, rawReadableStrategy = {}) {
        if (rawTransformer === undefined) {
            rawTransformer = null;
        }
        const writableStrategy = convertQueuingStrategy(rawWritableStrategy, 'Second parameter');
        const readableStrategy = convertQueuingStrategy(rawReadableStrategy, 'Third parameter');
        const transformer = convertTransformer(rawTransformer, 'First parameter');
        if (transformer.readableType !== undefined) {
            throw new RangeError('Invalid readableType specified');
        }
        if (transformer.writableType !== undefined) {
            throw new RangeError('Invalid writableType specified');
        }
        const readableHighWaterMark = ExtractHighWaterMark(readableStrategy, 0);
        const readableSizeAlgorithm = ExtractSizeAlgorithm(readableStrategy);
        const writableHighWaterMark = ExtractHighWaterMark(writableStrategy, 1);
        const writableSizeAlgorithm = ExtractSizeAlgorithm(writableStrategy);
        let startPromise_resolve;
        const startPromise = newPromise(resolve => {
            startPromise_resolve = resolve;
        });
        InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm);
        SetUpTransformStreamDefaultControllerFromTransformer(this, transformer);
        if (transformer.start !== undefined) {
            startPromise_resolve(transformer.start(this._transformStreamController));
        }
        else {
            startPromise_resolve(undefined);
        }
    }
    /**
     * The readable side of the transform stream.
     */
    get readable() {
        if (!IsTransformStream(this)) {
            throw streamBrandCheckException('readable');
        }
        return this._readable;
    }
    /**
     * The writable side of the transform stream.
     */
    get writable() {
        if (!IsTransformStream(this)) {
            throw streamBrandCheckException('writable');
        }
        return this._writable;
    }
}
Object.defineProperties(TransformStream.prototype, {
    readable: { enumerable: true },
    writable: { enumerable: true }
});
function InitializeTransformStream(stream, startPromise, writableHighWaterMark, writableSizeAlgorithm, readableHighWaterMark, readableSizeAlgorithm) {
    function startAlgorithm() {
        return startPromise;
    }
    function writeAlgorithm(chunk) {
        return TransformStreamDefaultSinkWriteAlgorithm(stream, chunk);
    }
    function abortAlgorithm(reason) {
        return TransformStreamDefaultSinkAbortAlgorithm(stream, reason);
    }
    function closeAlgorithm() {
        return TransformStreamDefaultSinkCloseAlgorithm(stream);
    }
    stream._writable = CreateWritableStream(startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, writableHighWaterMark, writableSizeAlgorithm);
    function pullAlgorithm() {
        return TransformStreamDefaultSourcePullAlgorithm(stream);
    }
    function cancelAlgorithm(reason) {
        TransformStreamErrorWritableAndUnblockWrite(stream, reason);
        return promiseResolvedWith(undefined);
    }
    stream._readable = CreateReadableStream(startAlgorithm, pullAlgorithm, cancelAlgorithm, readableHighWaterMark, readableSizeAlgorithm);
    // The [[backpressure]] slot is set to undefined so that it can be initialised by TransformStreamSetBackpressure.
    stream._backpressure = undefined;
    stream._backpressureChangePromise = undefined;
    stream._backpressureChangePromise_resolve = undefined;
    TransformStreamSetBackpressure(stream, true);
    stream._transformStreamController = undefined;
}
function IsTransformStream(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_transformStreamController')) {
        return false;
    }
    return x instanceof TransformStream;
}
// This is a no-op if both sides are already errored.
function TransformStreamError(stream, e) {
    ReadableStreamDefaultControllerError(stream._readable._readableStreamController, e);
    TransformStreamErrorWritableAndUnblockWrite(stream, e);
}
function TransformStreamErrorWritableAndUnblockWrite(stream, e) {
    TransformStreamDefaultControllerClearAlgorithms(stream._transformStreamController);
    WritableStreamDefaultControllerErrorIfNeeded(stream._writable._writableStreamController, e);
    if (stream._backpressure) {
        // Pretend that pull() was called to permit any pending write() calls to complete. TransformStreamSetBackpressure()
        // cannot be called from enqueue() or pull() once the ReadableStream is errored, so this will will be the final time
        // _backpressure is set.
        TransformStreamSetBackpressure(stream, false);
    }
}
function TransformStreamSetBackpressure(stream, backpressure) {
    // Passes also when called during construction.
    if (stream._backpressureChangePromise !== undefined) {
        stream._backpressureChangePromise_resolve();
    }
    stream._backpressureChangePromise = newPromise(resolve => {
        stream._backpressureChangePromise_resolve = resolve;
    });
    stream._backpressure = backpressure;
}
// Class TransformStreamDefaultController
/**
 * Allows control of the {@link ReadableStream} and {@link WritableStream} of the associated {@link TransformStream}.
 *
 * @public
 */
class TransformStreamDefaultController {
    constructor() {
        throw new TypeError('Illegal constructor');
    }
    /**
     * Returns the desired size to fill the readable side’s internal queue. It can be negative, if the queue is over-full.
     */
    get desiredSize() {
        if (!IsTransformStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException('desiredSize');
        }
        const readableController = this._controlledTransformStream._readable._readableStreamController;
        return ReadableStreamDefaultControllerGetDesiredSize(readableController);
    }
    enqueue(chunk = undefined) {
        if (!IsTransformStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException('enqueue');
        }
        TransformStreamDefaultControllerEnqueue(this, chunk);
    }
    /**
     * Errors both the readable side and the writable side of the controlled transform stream, making all future
     * interactions with it fail with the given error `e`. Any chunks queued for transformation will be discarded.
     */
    error(reason = undefined) {
        if (!IsTransformStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException('error');
        }
        TransformStreamDefaultControllerError(this, reason);
    }
    /**
     * Closes the readable side and errors the writable side of the controlled transform stream. This is useful when the
     * transformer only needs to consume a portion of the chunks written to the writable side.
     */
    terminate() {
        if (!IsTransformStreamDefaultController(this)) {
            throw defaultControllerBrandCheckException('terminate');
        }
        TransformStreamDefaultControllerTerminate(this);
    }
}
Object.defineProperties(TransformStreamDefaultController.prototype, {
    enqueue: { enumerable: true },
    error: { enumerable: true },
    terminate: { enumerable: true },
    desiredSize: { enumerable: true }
});
// Transform Stream Default Controller Abstract Operations
function IsTransformStreamDefaultController(x) {
    if (!typeIsObject(x)) {
        return false;
    }
    if (!Object.prototype.hasOwnProperty.call(x, '_controlledTransformStream')) {
        return false;
    }
    return x instanceof TransformStreamDefaultController;
}
function SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm) {
    controller._controlledTransformStream = stream;
    stream._transformStreamController = controller;
    controller._transformAlgorithm = transformAlgorithm;
    controller._flushAlgorithm = flushAlgorithm;
}
function SetUpTransformStreamDefaultControllerFromTransformer(stream, transformer) {
    const controller = Object.create(TransformStreamDefaultController.prototype);
    let transformAlgorithm = (chunk) => {
        try {
            TransformStreamDefaultControllerEnqueue(controller, chunk);
            return promiseResolvedWith(undefined);
        }
        catch (transformResultE) {
            return promiseRejectedWith(transformResultE);
        }
    };
    let flushAlgorithm = () => promiseResolvedWith(undefined);
    if (transformer.transform !== undefined) {
        transformAlgorithm = chunk => transformer.transform(chunk, controller);
    }
    if (transformer.flush !== undefined) {
        flushAlgorithm = () => transformer.flush(controller);
    }
    SetUpTransformStreamDefaultController(stream, controller, transformAlgorithm, flushAlgorithm);
}
function TransformStreamDefaultControllerClearAlgorithms(controller) {
    controller._transformAlgorithm = undefined;
    controller._flushAlgorithm = undefined;
}
function TransformStreamDefaultControllerEnqueue(controller, chunk) {
    const stream = controller._controlledTransformStream;
    const readableController = stream._readable._readableStreamController;
    if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(readableController)) {
        throw new TypeError('Readable side is not in a state that permits enqueue');
    }
    // We throttle transform invocations based on the backpressure of the ReadableStream, but we still
    // accept TransformStreamDefaultControllerEnqueue() calls.
    try {
        ReadableStreamDefaultControllerEnqueue(readableController, chunk);
    }
    catch (e) {
        // This happens when readableStrategy.size() throws.
        TransformStreamErrorWritableAndUnblockWrite(stream, e);
        throw stream._readable._storedError;
    }
    const backpressure = ReadableStreamDefaultControllerHasBackpressure(readableController);
    if (backpressure !== stream._backpressure) {
        TransformStreamSetBackpressure(stream, true);
    }
}
function TransformStreamDefaultControllerError(controller, e) {
    TransformStreamError(controller._controlledTransformStream, e);
}
function TransformStreamDefaultControllerPerformTransform(controller, chunk) {
    const transformPromise = controller._transformAlgorithm(chunk);
    return transformPromiseWith(transformPromise, undefined, r => {
        TransformStreamError(controller._controlledTransformStream, r);
        throw r;
    });
}
function TransformStreamDefaultControllerTerminate(controller) {
    const stream = controller._controlledTransformStream;
    const readableController = stream._readable._readableStreamController;
    ReadableStreamDefaultControllerClose(readableController);
    const error = new TypeError('TransformStream terminated');
    TransformStreamErrorWritableAndUnblockWrite(stream, error);
}
// TransformStreamDefaultSink Algorithms
function TransformStreamDefaultSinkWriteAlgorithm(stream, chunk) {
    const controller = stream._transformStreamController;
    if (stream._backpressure) {
        const backpressureChangePromise = stream._backpressureChangePromise;
        return transformPromiseWith(backpressureChangePromise, () => {
            const writable = stream._writable;
            const state = writable._state;
            if (state === 'erroring') {
                throw writable._storedError;
            }
            return TransformStreamDefaultControllerPerformTransform(controller, chunk);
        });
    }
    return TransformStreamDefaultControllerPerformTransform(controller, chunk);
}
function TransformStreamDefaultSinkAbortAlgorithm(stream, reason) {
    // abort() is not called synchronously, so it is possible for abort() to be called when the stream is already
    // errored.
    TransformStreamError(stream, reason);
    return promiseResolvedWith(undefined);
}
function TransformStreamDefaultSinkCloseAlgorithm(stream) {
    // stream._readable cannot change after construction, so caching it across a call to user code is safe.
    const readable = stream._readable;
    const controller = stream._transformStreamController;
    const flushPromise = controller._flushAlgorithm();
    TransformStreamDefaultControllerClearAlgorithms(controller);
    // Return a promise that is fulfilled with undefined on success.
    return transformPromiseWith(flushPromise, () => {
        if (readable._state === 'errored') {
            throw readable._storedError;
        }
        ReadableStreamDefaultControllerClose(readable._readableStreamController);
    }, r => {
        TransformStreamError(stream, r);
        throw readable._storedError;
    });
}
// TransformStreamDefaultSource Algorithms
function TransformStreamDefaultSourcePullAlgorithm(stream) {
    // Invariant. Enforced by the promises returned by start() and pull().
    TransformStreamSetBackpressure(stream, false);
    // Prevent the next pull() call until there is backpressure.
    return stream._backpressureChangePromise;
}
// Helper functions for the TransformStreamDefaultController.
function defaultControllerBrandCheckException(name) {
    return new TypeError(`TransformStreamDefaultController.prototype.${name} can only be used on a TransformStreamDefaultController`);
}
// Helper functions for the TransformStream.
function streamBrandCheckException(name) {
    return new TypeError(`TransformStream.prototype.${name} can only be used on a TransformStream`);
}

/* c8 ignore start */
// 64 KiB (same size chrome slice theirs blob into Uint8array's)
const POOL_SIZE$1 = 65536;


try {
  // Don't use node: prefix for this, require+node: is not supported until node v14.14
  // Only `import()` can use prefix in 12.20 and later
  const { Blob } = require('buffer');
  if (Blob && !Blob.prototype.stream) {
    Blob.prototype.stream = function name (params) {
      let position = 0;
      const blob = this;

      return new ReadableStream({
        type: 'bytes',
        async pull (ctrl) {
          const chunk = blob.slice(position, Math.min(blob.size, position + POOL_SIZE$1));
          const buffer = await chunk.arrayBuffer();
          position += buffer.byteLength;
          ctrl.enqueue(new Uint8Array(buffer));

          if (position === blob.size) {
            ctrl.close();
          }
        }
      })
    };
  }
} catch (error) {}
/* c8 ignore end */

// 64 KiB (same size chrome slice theirs blob into Uint8array's)
const POOL_SIZE = 65536;

/** @param {(Blob | Uint8Array)[]} parts */
async function * toIterator (parts, clone = true) {
  for (const part of parts) {
    if ('stream' in part) {
      yield * (/** @type {AsyncIterableIterator<Uint8Array>} */ (part.stream()));
    } else if (ArrayBuffer.isView(part)) {
      if (clone) {
        let position = part.byteOffset;
        const end = part.byteOffset + part.byteLength;
        while (position !== end) {
          const size = Math.min(end - position, POOL_SIZE);
          const chunk = part.buffer.slice(position, position + size);
          position += chunk.byteLength;
          yield new Uint8Array(chunk);
        }
      } else {
        yield part;
      }
    /* c8 ignore next 10 */
    } else {
      // For blobs that have arrayBuffer but no stream method (nodes buffer.Blob)
      let position = 0, b = (/** @type {Blob} */ (part));
      while (position !== b.size) {
        const chunk = b.slice(position, Math.min(b.size, position + POOL_SIZE));
        const buffer = await chunk.arrayBuffer();
        position += buffer.byteLength;
        yield new Uint8Array(buffer);
      }
    }
  }
}

const _Blob = class Blob {
  /** @type {Array.<(Blob|Uint8Array)>} */
  #parts = []
  #type = ''
  #size = 0
  #endings = 'transparent'

  /**
   * The Blob() constructor returns a new Blob object. The content
   * of the blob consists of the concatenation of the values given
   * in the parameter array.
   *
   * @param {*} blobParts
   * @param {{ type?: string, endings?: string }} [options]
   */
  constructor (blobParts = [], options = {}) {
    if (typeof blobParts !== 'object' || blobParts === null) {
      throw new TypeError('Failed to construct \'Blob\': The provided value cannot be converted to a sequence.')
    }

    if (typeof blobParts[Symbol.iterator] !== 'function') {
      throw new TypeError('Failed to construct \'Blob\': The object must have a callable @@iterator property.')
    }

    if (typeof options !== 'object' && typeof options !== 'function') {
      throw new TypeError('Failed to construct \'Blob\': parameter 2 cannot convert to dictionary.')
    }

    if (options === null) options = {};

    const encoder = new TextEncoder();
    for (const element of blobParts) {
      let part;
      if (ArrayBuffer.isView(element)) {
        part = new Uint8Array(element.buffer.slice(element.byteOffset, element.byteOffset + element.byteLength));
      } else if (element instanceof ArrayBuffer) {
        part = new Uint8Array(element.slice(0));
      } else if (element instanceof Blob) {
        part = element;
      } else {
        part = encoder.encode(`${element}`);
      }

      this.#size += ArrayBuffer.isView(part) ? part.byteLength : part.size;
      this.#parts.push(part);
    }

    this.#endings = `${options.endings === undefined ? 'transparent' : options.endings}`;
    const type = options.type === undefined ? '' : String(options.type);
    this.#type = /^[\x20-\x7E]*$/.test(type) ? type : '';
  }

  /**
   * The Blob interface's size property returns the
   * size of the Blob in bytes.
   */
  get size () {
    return this.#size
  }

  /**
   * The type property of a Blob object returns the MIME type of the file.
   */
  get type () {
    return this.#type
  }

  /**
   * The text() method in the Blob interface returns a Promise
   * that resolves with a string containing the contents of
   * the blob, interpreted as UTF-8.
   *
   * @return {Promise<string>}
   */
  async text () {
    // More optimized than using this.arrayBuffer()
    // that requires twice as much ram
    const decoder = new TextDecoder();
    let str = '';
    for await (const part of toIterator(this.#parts, false)) {
      str += decoder.decode(part, { stream: true });
    }
    // Remaining
    str += decoder.decode();
    return str
  }

  /**
   * The arrayBuffer() method in the Blob interface returns a
   * Promise that resolves with the contents of the blob as
   * binary data contained in an ArrayBuffer.
   *
   * @return {Promise<ArrayBuffer>}
   */
  async arrayBuffer () {
    // Easier way... Just a unnecessary overhead
    // const view = new Uint8Array(this.size);
    // await this.stream().getReader({mode: 'byob'}).read(view);
    // return view.buffer;

    const data = new Uint8Array(this.size);
    let offset = 0;
    for await (const chunk of toIterator(this.#parts, false)) {
      data.set(chunk, offset);
      offset += chunk.length;
    }

    return data.buffer
  }

  stream () {
    const it = toIterator(this.#parts, true);

    return new ReadableStream({
      // @ts-ignore
      type: 'bytes',
      async pull (ctrl) {
        const chunk = await it.next();
        chunk.done ? ctrl.close() : ctrl.enqueue(chunk.value);
      },

      async cancel () {
        await it.return();
      }
    })
  }

  /**
   * The Blob interface's slice() method creates and returns a
   * new Blob object which contains data from a subset of the
   * blob on which it's called.
   *
   * @param {number} [start]
   * @param {number} [end]
   * @param {string} [type]
   */
  slice (start = 0, end = this.size, type = '') {
    const { size } = this;

    let relativeStart = start < 0 ? Math.max(size + start, 0) : Math.min(start, size);
    let relativeEnd = end < 0 ? Math.max(size + end, 0) : Math.min(end, size);

    const span = Math.max(relativeEnd - relativeStart, 0);
    const parts = this.#parts;
    const blobParts = [];
    let added = 0;

    for (const part of parts) {
      // don't add the overflow to new blobParts
      if (added >= span) {
        break
      }

      const size = ArrayBuffer.isView(part) ? part.byteLength : part.size;
      if (relativeStart && size <= relativeStart) {
        // Skip the beginning and change the relative
        // start & end position as we skip the unwanted parts
        relativeStart -= size;
        relativeEnd -= size;
      } else {
        let chunk;
        if (ArrayBuffer.isView(part)) {
          chunk = part.subarray(relativeStart, Math.min(size, relativeEnd));
          added += chunk.byteLength;
        } else {
          chunk = part.slice(relativeStart, Math.min(size, relativeEnd));
          added += chunk.size;
        }
        relativeEnd -= size;
        blobParts.push(chunk);
        relativeStart = 0; // All next sequential parts should start at 0
      }
    }

    const blob = new Blob([], { type: String(type).toLowerCase() });
    blob.#size = span;
    blob.#parts = blobParts;

    return blob
  }

  get [Symbol.toStringTag] () {
    return 'Blob'
  }

  static [Symbol.hasInstance] (object) {
    return (
      object &&
      typeof object === 'object' &&
      typeof object.constructor === 'function' &&
      (
        typeof object.stream === 'function' ||
        typeof object.arrayBuffer === 'function'
      ) &&
      /^(Blob|File)$/.test(object[Symbol.toStringTag])
    )
  }
};

Object.defineProperties(_Blob.prototype, {
  size: { enumerable: true },
  type: { enumerable: true },
  slice: { enumerable: true }
});

/** @type {typeof globalThis.Blob} */
const Blob = _Blob;

const _File = class File extends Blob {
  #lastModified = 0
  #name = ''

  /**
   * @param {*[]} fileBits
   * @param {string} fileName
   * @param {{lastModified?: number, type?: string}} options
   */// @ts-ignore
  constructor (fileBits, fileName, options = {}) {
    if (arguments.length < 2) {
      throw new TypeError(`Failed to construct 'File': 2 arguments required, but only ${arguments.length} present.`)
    }
    super(fileBits, options);

    if (options === null) options = {};

    // Simulate WebIDL type casting for NaN value in lastModified option.
    const lastModified = options.lastModified === undefined ? Date.now() : Number(options.lastModified);
    if (!Number.isNaN(lastModified)) {
      this.#lastModified = lastModified;
    }

    this.#name = String(fileName);
  }

  get name () {
    return this.#name
  }

  get lastModified () {
    return this.#lastModified
  }

  get [Symbol.toStringTag] () {
    return 'File'
  }

  static [Symbol.hasInstance] (object) {
    return !!object && object instanceof Blob &&
      /^(File)$/.test(object[Symbol.toStringTag])
  }
};

/** @type {typeof globalThis.File} */// @ts-ignore
const File = _File;

class CustomEvent extends Event {
    constructor(type, params) {
        params = Object(params);
        super(type, params);
        if ('detail' in params)
            this.detail = params.detail;
    }
}
allowStringTag(CustomEvent);

class TreeWalker {
    parentNode() {
        return null;
    }
    firstChild() {
        return null;
    }
    lastChild() {
        return null;
    }
    previousSibling() {
        return null;
    }
    nextSibling() {
        return null;
    }
    previousNode() {
        return null;
    }
    nextNode() {
        return null;
    }
    get currentNode() {
        const internals = internalsOf(this, 'TreeWalker', 'currentNode');
        return internals.currentNode;
    }
    get root() {
        const internals = internalsOf(this, 'TreeWalker', 'root');
        return internals.root;
    }
    get whatToShow() {
        const internals = internalsOf(this, 'TreeWalker', 'whatToShow');
        return internals.whatToShow;
    }
}
allowStringTag(TreeWalker);

const INTERNAL$1 = { tick: 0, pool: new Map };
function requestIdleCallback(callback) {
    if (!INTERNAL$1.pool.size) {
        setTimeout$1(() => {
            const next = __performance_now();
            for (const func of INTERNAL$1.pool.values()) {
                func(next);
            }
            INTERNAL$1.pool.clear();
        }, 1000 / 16);
    }
    const func = __function_bind(callback, undefined);
    const tick = ++INTERNAL$1.tick;
    INTERNAL$1.pool.set(tick, func);
    return tick;
}
function cancelIdleCallback(requestId) {
    const timeout = INTERNAL$1.pool.get(requestId);
    if (timeout) {
        clearTimeout$1(timeout);
        INTERNAL$1.pool.delete(requestId);
    }
}

/**
 * Returns a `Buffer` instance from the given data URI `uri`.
 *
 * @param {String} uri Data URI to turn into a Buffer instance
 * @returns {Buffer} Buffer instance from Data URI
 * @api public
 */
function dataUriToBuffer(uri) {
    if (!/^data:/i.test(uri)) {
        throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
    }
    // strip newlines
    uri = uri.replace(/\r?\n/g, '');
    // split the URI up into the "metadata" and the "data" portions
    const firstComma = uri.indexOf(',');
    if (firstComma === -1 || firstComma <= 4) {
        throw new TypeError('malformed data: URI');
    }
    // remove the "data:" scheme and parse the metadata
    const meta = uri.substring(5, firstComma).split(';');
    let charset = '';
    let base64 = false;
    const type = meta[0] || 'text/plain';
    let typeFull = type;
    for (let i = 1; i < meta.length; i++) {
        if (meta[i] === 'base64') {
            base64 = true;
        }
        else {
            typeFull += `;${meta[i]}`;
            if (meta[i].indexOf('charset=') === 0) {
                charset = meta[i].substring(8);
            }
        }
    }
    // defaults to US-ASCII only if type is not provided
    if (!meta[0] && !charset.length) {
        typeFull += ';charset=US-ASCII';
        charset = 'US-ASCII';
    }
    // get the encoded data portion and decode URI-encoded chars
    const encoding = base64 ? 'base64' : 'ascii';
    const data = unescape(uri.substring(firstComma + 1));
    const buffer = Buffer.from(data, encoding);
    // set `.type` and `.typeFull` properties to MIME type
    buffer.type = type;
    buffer.typeFull = typeFull;
    // set the `.charset` property
    buffer.charset = charset;
    return buffer;
}

/*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */

var {toStringTag:t$1,iterator:i$1,hasInstance:h$1}=Symbol,
r$1=Math.random,
m$1='append,set,get,getAll,delete,keys,values,entries,forEach,constructor'.split(','),
f$2=(a,b,c)=>(a+='',/^(Blob|File)$/.test(b && b[t$1])?[(c=c!==void 0?c+'':b[t$1]=='File'?b.name:'blob',a),b.name!==c||b[t$1]=='blob'?new File([b],c,b):b]:[a,b+'']),
e$1=(c,f)=>(f?c:c.replace(/\r?\n|\r/g,'\r\n')).replace(/\n/g,'%0A').replace(/\r/g,'%0D').replace(/"/g,'%22'),
x$1=(n, a, e)=>{if(a.length<e){throw new TypeError(`Failed to execute '${n}' on 'FormData': ${e} arguments required, but only ${a.length} present.`)}};

/** @type {typeof globalThis.FormData} */
const FormData = class FormData {
#d=[];
constructor(...a){if(a.length)throw new TypeError(`Failed to construct 'FormData': parameter 1 is not of type 'HTMLFormElement'.`)}
get [t$1]() {return 'FormData'}
[i$1](){return this.entries()}
static [h$1](o) {return o&&typeof o==='object'&&o[t$1]==='FormData'&&!m$1.some(m=>typeof o[m]!='function')}
append(...a){x$1('append',arguments,2);this.#d.push(f$2(...a));}
delete(a){x$1('delete',arguments,1);a+='';this.#d=this.#d.filter(([b])=>b!==a);}
get(a){x$1('get',arguments,1);a+='';for(var b=this.#d,l=b.length,c=0;c<l;c++)if(b[c][0]===a)return b[c][1];return null}
getAll(a,b){x$1('getAll',arguments,1);b=[];a+='';this.#d.forEach(c=>c[0]===a&&b.push(c[1]));return b}
has(a){x$1('has',arguments,1);a+='';return this.#d.some(b=>b[0]===a)}
forEach(a,b){x$1('forEach',arguments,1);for(var [c,d]of this)a.call(b,d,c,this);}
set(...a){x$1('set',arguments,2);var b=[],c=!0;a=f$2(...a);this.#d.forEach(d=>{d[0]===a[0]?c&&(c=!b.push(a)):b.push(d);});c&&b.push(a);this.#d=b;}
*entries(){yield*this.#d;}
*keys(){for(var[a]of this)yield a;}
*values(){for(var[,a]of this)yield a;}};

/** @param {FormData} F */
function formDataToBlob (F,B=Blob){
var b=`${r$1()}${r$1()}`.replace(/\./g, '').slice(-28).padStart(32, '-'),c=[],p=`--${b}\r\nContent-Disposition: form-data; name="`;
F.forEach((v,n)=>typeof v=='string'
?c.push(p+e$1(n)+`"\r\n\r\n${v.replace(/\r(?!\n)|(?<!\r)\n/g, '\r\n')}\r\n`)
:c.push(p+e$1(n)+`"; filename="${e$1(v.name, 1)}"\r\nContent-Type: ${v.type||"application/octet-stream"}\r\n\r\n`, v, '\r\n'));
c.push(`--${b}--`);
return new B(c,{type:"multipart/form-data; boundary="+b})}

class FetchBaseError extends Error {
	constructor(message, type) {
		super(message);
		// Hide custom error implementation details from end-users
		Error.captureStackTrace(this, this.constructor);

		this.type = type;
	}

	get name() {
		return this.constructor.name;
	}

	get [Symbol.toStringTag]() {
		return this.constructor.name;
	}
}

/**
 * @typedef {{ address?: string, code: string, dest?: string, errno: number, info?: object, message: string, path?: string, port?: number, syscall: string}} SystemError
*/

/**
 * FetchError interface for operational errors
 */
class FetchError extends FetchBaseError {
	/**
	 * @param  {string} message -      Error message for human
	 * @param  {string} [type] -        Error type for machine
	 * @param  {SystemError} [systemError] - For Node.js system error
	 */
	constructor(message, type, systemError) {
		super(message, type);
		// When err.type is `system`, err.erroredSysCall contains system error and err.code contains system error code
		if (systemError) {
			// eslint-disable-next-line no-multi-assign
			this.code = this.errno = systemError.code;
			this.erroredSysCall = systemError.syscall;
		}
	}
}

/**
 * Is.js
 *
 * Object type checks.
 */

const NAME = Symbol.toStringTag;

/**
 * Check if `obj` is a URLSearchParams object
 * ref: https://github.com/node-fetch/node-fetch/issues/296#issuecomment-307598143
 * @param {*} object - Object to check for
 * @return {boolean}
 */
const isURLSearchParameters = object => {
	return (
		typeof object === 'object' &&
		typeof object.append === 'function' &&
		typeof object.delete === 'function' &&
		typeof object.get === 'function' &&
		typeof object.getAll === 'function' &&
		typeof object.has === 'function' &&
		typeof object.set === 'function' &&
		typeof object.sort === 'function' &&
		object[NAME] === 'URLSearchParams'
	);
};

/**
 * Check if `object` is a W3C `Blob` object (which `File` inherits from)
 * @param {*} object - Object to check for
 * @return {boolean}
 */
const isBlob = object => {
	return (
		object &&
		typeof object === 'object' &&
		typeof object.arrayBuffer === 'function' &&
		typeof object.type === 'string' &&
		typeof object.stream === 'function' &&
		typeof object.constructor === 'function' &&
		/^(Blob|File)$/.test(object[NAME])
	);
};

/**
 * Check if `obj` is an instance of AbortSignal.
 * @param {*} object - Object to check for
 * @return {boolean}
 */
const isAbortSignal = object => {
	return (
		typeof object === 'object' && (
			object[NAME] === 'AbortSignal' ||
			object[NAME] === 'EventTarget'
		)
	);
};

/**
 * isDomainOrSubdomain reports whether sub is a subdomain (or exact match) of
 * the parent domain.
 *
 * Both domains must already be in canonical form.
 * @param {string|URL} original
 * @param {string|URL} destination
 */
const isDomainOrSubdomain = (destination, original) => {
	const orig = new URL(original).hostname;
	const dest = new URL(destination).hostname;

	return orig === dest || orig.endsWith(`.${dest}`);
};

const pipeline = promisify(Stream.pipeline);
const INTERNALS$2 = Symbol('Body internals');

/**
 * Body mixin
 *
 * Ref: https://fetch.spec.whatwg.org/#body
 *
 * @param   Stream  body  Readable stream
 * @param   Object  opts  Response options
 * @return  Void
 */
class Body {
	constructor(body, {
		size = 0
	} = {}) {
		let boundary = null;

		if (body === null) {
			// Body is undefined or null
			body = null;
		} else if (isURLSearchParameters(body)) {
			// Body is a URLSearchParams
			body = Buffer.from(body.toString());
		} else if (isBlob(body)) ; else if (Buffer.isBuffer(body)) ; else if (types.isAnyArrayBuffer(body)) {
			// Body is ArrayBuffer
			body = Buffer.from(body);
		} else if (ArrayBuffer.isView(body)) {
			// Body is ArrayBufferView
			body = Buffer.from(body.buffer, body.byteOffset, body.byteLength);
		} else if (body instanceof Stream) ; else if (body instanceof FormData) {
			// Body is FormData
			body = formDataToBlob(body);
			boundary = body.type.split('=')[1];
		} else {
			// None of the above
			// coerce to string then buffer
			body = Buffer.from(String(body));
		}

		let stream = body;

		if (Buffer.isBuffer(body)) {
			stream = Stream.Readable.from(body);
		} else if (isBlob(body)) {
			stream = Stream.Readable.from(body.stream());
		}

		this[INTERNALS$2] = {
			body,
			stream,
			boundary,
			disturbed: false,
			error: null
		};
		this.size = size;

		if (body instanceof Stream) {
			body.on('error', error_ => {
				const error = error_ instanceof FetchBaseError ?
					error_ :
					new FetchError(`Invalid response body while trying to fetch ${this.url}: ${error_.message}`, 'system', error_);
				this[INTERNALS$2].error = error;
			});
		}
	}

	get body() {
		return this[INTERNALS$2].stream;
	}

	get bodyUsed() {
		return this[INTERNALS$2].disturbed;
	}

	/**
	 * Decode response as ArrayBuffer
	 *
	 * @return  Promise
	 */
	async arrayBuffer() {
		const {buffer, byteOffset, byteLength} = await consumeBody(this);
		return buffer.slice(byteOffset, byteOffset + byteLength);
	}

	async formData() {
		const ct = this.headers.get('content-type');

		if (ct.startsWith('application/x-www-form-urlencoded')) {
			const formData = new FormData();
			const parameters = new URLSearchParams(await this.text());

			for (const [name, value] of parameters) {
				formData.append(name, value);
			}

			return formData;
		}

		const {toFormData} = await Promise.resolve().then(function () { return multipartParser; });
		return toFormData(this.body, ct);
	}

	/**
	 * Return raw response as Blob
	 *
	 * @return Promise
	 */
	async blob() {
		const ct = (this.headers && this.headers.get('content-type')) || (this[INTERNALS$2].body && this[INTERNALS$2].body.type) || '';
		const buf = await this.arrayBuffer();

		return new Blob([buf], {
			type: ct
		});
	}

	/**
	 * Decode response as json
	 *
	 * @return  Promise
	 */
	async json() {
		const buffer = await consumeBody(this);
		return JSON.parse(buffer.toString());
	}

	/**
	 * Decode response as text
	 *
	 * @return  Promise
	 */
	async text() {
		const buffer = await consumeBody(this);
		return buffer.toString();
	}

	/**
	 * Decode response as buffer (non-spec api)
	 *
	 * @return  Promise
	 */
	buffer() {
		return consumeBody(this);
	}
}


// In browsers, all properties are enumerable.
Object.defineProperties(Body.prototype, {
	body: {enumerable: true},
	bodyUsed: {enumerable: true},
	arrayBuffer: {enumerable: true},
	blob: {enumerable: true},
	json: {enumerable: true},
	text: {enumerable: true},
});

/**
 * Consume and convert an entire Body to a Buffer.
 *
 * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
 *
 * @return Promise
 */
async function consumeBody(data) {
	if (data[INTERNALS$2].disturbed) {
		throw new TypeError(`body used already for: ${data.url}`);
	}

	data[INTERNALS$2].disturbed = true;

	if (data[INTERNALS$2].error) {
		throw data[INTERNALS$2].error;
	}

	const {body} = data;

	// Body is null
	if (body === null) {
		return Buffer.alloc(0);
	}

	/* c8 ignore next 3 */
	if (!(body instanceof Stream)) {
		return Buffer.alloc(0);
	}

	// Body is stream
	// get ready to actually consume the body
	const accum = [];
	let accumBytes = 0;

	try {
		for await (const chunk of body) {
			if (data.size > 0 && accumBytes + chunk.length > data.size) {
				const error = new FetchError(`content size at ${data.url} over limit: ${data.size}`, 'max-size');
				body.destroy(error);
				throw error;
			}

			accumBytes += chunk.length;
			accum.push(chunk);
		}
	} catch (error) {
		const error_ = error instanceof FetchBaseError ? error : new FetchError(`Invalid response body while trying to fetch ${data.url}: ${error.message}`, 'system', error);
		throw error_;
	}

	if (body.readableEnded === true || body._readableState.ended === true) {
		try {
			if (accum.every(c => typeof c === 'string')) {
				return Buffer.from(accum.join(''));
			}

			return Buffer.concat(accum, accumBytes);
		} catch (error) {
			throw new FetchError(`Could not create Buffer from response body for ${data.url}: ${error.message}`, 'system', error);
		}
	} else {
		throw new FetchError(`Premature close of server response while trying to fetch ${data.url}`);
	}
}

/**
 * Clone body given Res/Req instance
 *
 * @param   Mixed   instance       Response or Request instance
 * @param   String  highWaterMark  highWaterMark for both PassThrough body streams
 * @return  Mixed
 */
const clone = (instance, highWaterMark) => {
	let p1;
	let p2;
	let {body} = instance[INTERNALS$2];

	// Don't allow cloning a used body
	if (instance.bodyUsed) {
		throw new Error('cannot clone body after it is used');
	}

	// Check that body is a stream and not form-data object
	// note: we can't clone the form-data object without having it as a dependency
	if ((body instanceof Stream) && (typeof body.getBoundary !== 'function')) {
		// Tee instance body
		p1 = new PassThrough({highWaterMark});
		p2 = new PassThrough({highWaterMark});
		body.pipe(p1);
		body.pipe(p2);
		// Set instance body to teed body and return the other teed body
		instance[INTERNALS$2].stream = p1;
		body = p2;
	}

	return body;
};

const getNonSpecFormDataBoundary = deprecate(
	body => body.getBoundary(),
	'form-data doesn\'t follow the spec and requires special treatment. Use alternative package',
	'https://github.com/node-fetch/node-fetch/issues/1167'
);

/**
 * Performs the operation "extract a `Content-Type` value from |object|" as
 * specified in the specification:
 * https://fetch.spec.whatwg.org/#concept-bodyinit-extract
 *
 * This function assumes that instance.body is present.
 *
 * @param {any} body Any options.body input
 * @returns {string | null}
 */
const extractContentType = (body, request) => {
	// Body is null or undefined
	if (body === null) {
		return null;
	}

	// Body is string
	if (typeof body === 'string') {
		return 'text/plain;charset=UTF-8';
	}

	// Body is a URLSearchParams
	if (isURLSearchParameters(body)) {
		return 'application/x-www-form-urlencoded;charset=UTF-8';
	}

	// Body is blob
	if (isBlob(body)) {
		return body.type || null;
	}

	// Body is a Buffer (Buffer, ArrayBuffer or ArrayBufferView)
	if (Buffer.isBuffer(body) || types.isAnyArrayBuffer(body) || ArrayBuffer.isView(body)) {
		return null;
	}

	if (body instanceof FormData) {
		return `multipart/form-data; boundary=${request[INTERNALS$2].boundary}`;
	}

	// Detect form data input from form-data module
	if (body && typeof body.getBoundary === 'function') {
		return `multipart/form-data;boundary=${getNonSpecFormDataBoundary(body)}`;
	}

	// Body is stream - can't really do much about this
	if (body instanceof Stream) {
		return null;
	}

	// Body constructor defaults other things to string
	return 'text/plain;charset=UTF-8';
};

/**
 * The Fetch Standard treats this as if "total bytes" is a property on the body.
 * For us, we have to explicitly get it with a function.
 *
 * ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes
 *
 * @param {any} obj.body Body object from the Body instance.
 * @returns {number | null}
 */
const getTotalBytes = request => {
	const {body} = request[INTERNALS$2];

	// Body is null or undefined
	if (body === null) {
		return 0;
	}

	// Body is Blob
	if (isBlob(body)) {
		return body.size;
	}

	// Body is Buffer
	if (Buffer.isBuffer(body)) {
		return body.length;
	}

	// Detect form data input from form-data module
	if (body && typeof body.getLengthSync === 'function') {
		return body.hasKnownLength && body.hasKnownLength() ? body.getLengthSync() : null;
	}

	// Body is stream
	return null;
};

/**
 * Write a Body to a Node.js WritableStream (e.g. http.Request) object.
 *
 * @param {Stream.Writable} dest The stream to write to.
 * @param obj.body Body object from the Body instance.
 * @returns {Promise<void>}
 */
const writeToStream = async (dest, {body}) => {
	if (body === null) {
		// Body is null
		dest.end();
	} else {
		// Body is stream
		await pipeline(body, dest);
	}
};

/**
 * Headers.js
 *
 * Headers class offers convenient helpers
 */

/* c8 ignore next 9 */
const validateHeaderName = typeof http.validateHeaderName === 'function' ?
	http.validateHeaderName :
	name => {
		if (!/^[\^`\-\w!#$%&'*+.|~]+$/.test(name)) {
			const error = new TypeError(`Header name must be a valid HTTP token [${name}]`);
			Object.defineProperty(error, 'code', {value: 'ERR_INVALID_HTTP_TOKEN'});
			throw error;
		}
	};

/* c8 ignore next 9 */
const validateHeaderValue = typeof http.validateHeaderValue === 'function' ?
	http.validateHeaderValue :
	(name, value) => {
		if (/[^\t\u0020-\u007E\u0080-\u00FF]/.test(value)) {
			const error = new TypeError(`Invalid character in header content ["${name}"]`);
			Object.defineProperty(error, 'code', {value: 'ERR_INVALID_CHAR'});
			throw error;
		}
	};

/**
 * @typedef {Headers | Record<string, string> | Iterable<readonly [string, string]> | Iterable<Iterable<string>>} HeadersInit
 */

/**
 * This Fetch API interface allows you to perform various actions on HTTP request and response headers.
 * These actions include retrieving, setting, adding to, and removing.
 * A Headers object has an associated header list, which is initially empty and consists of zero or more name and value pairs.
 * You can add to this using methods like append() (see Examples.)
 * In all methods of this interface, header names are matched by case-insensitive byte sequence.
 *
 */
class Headers extends URLSearchParams {
	/**
	 * Headers class
	 *
	 * @constructor
	 * @param {HeadersInit} [init] - Response headers
	 */
	constructor(init) {
		// Validate and normalize init object in [name, value(s)][]
		/** @type {string[][]} */
		let result = [];
		if (init instanceof Headers) {
			const raw = init.raw();
			for (const [name, values] of Object.entries(raw)) {
				result.push(...values.map(value => [name, value]));
			}
		} else if (init == null) ; else if (typeof init === 'object' && !types.isBoxedPrimitive(init)) {
			const method = init[Symbol.iterator];
			// eslint-disable-next-line no-eq-null, eqeqeq
			if (method == null) {
				// Record<ByteString, ByteString>
				result.push(...Object.entries(init));
			} else {
				if (typeof method !== 'function') {
					throw new TypeError('Header pairs must be iterable');
				}

				// Sequence<sequence<ByteString>>
				// Note: per spec we have to first exhaust the lists then process them
				result = [...init]
					.map(pair => {
						if (
							typeof pair !== 'object' || types.isBoxedPrimitive(pair)
						) {
							throw new TypeError('Each header pair must be an iterable object');
						}

						return [...pair];
					}).map(pair => {
						if (pair.length !== 2) {
							throw new TypeError('Each header pair must be a name/value tuple');
						}

						return [...pair];
					});
			}
		} else {
			throw new TypeError('Failed to construct \'Headers\': The provided value is not of type \'(sequence<sequence<ByteString>> or record<ByteString, ByteString>)');
		}

		// Validate and lowercase
		result =
			result.length > 0 ?
				result.map(([name, value]) => {
					validateHeaderName(name);
					validateHeaderValue(name, String(value));
					return [String(name).toLowerCase(), String(value)];
				}) :
				undefined;

		super(result);

		// Returning a Proxy that will lowercase key names, validate parameters and sort keys
		// eslint-disable-next-line no-constructor-return
		return new Proxy(this, {
			get(target, p, receiver) {
				switch (p) {
					case 'append':
					case 'set':
						return (name, value) => {
							validateHeaderName(name);
							validateHeaderValue(name, String(value));
							return URLSearchParams.prototype[p].call(
								target,
								String(name).toLowerCase(),
								String(value)
							);
						};

					case 'delete':
					case 'has':
					case 'getAll':
						return name => {
							validateHeaderName(name);
							return URLSearchParams.prototype[p].call(
								target,
								String(name).toLowerCase()
							);
						};

					case 'keys':
						return () => {
							target.sort();
							return new Set(URLSearchParams.prototype.keys.call(target)).keys();
						};

					default:
						return Reflect.get(target, p, receiver);
				}
			}
		});
		/* c8 ignore next */
	}

	get [Symbol.toStringTag]() {
		return this.constructor.name;
	}

	toString() {
		return Object.prototype.toString.call(this);
	}

	get(name) {
		const values = this.getAll(name);
		if (values.length === 0) {
			return null;
		}

		let value = values.join(', ');
		if (/^content-encoding$/i.test(name)) {
			value = value.toLowerCase();
		}

		return value;
	}

	forEach(callback, thisArg = undefined) {
		for (const name of this.keys()) {
			Reflect.apply(callback, thisArg, [this.get(name), name, this]);
		}
	}

	* values() {
		for (const name of this.keys()) {
			yield this.get(name);
		}
	}

	/**
	 * @type {() => IterableIterator<[string, string]>}
	 */
	* entries() {
		for (const name of this.keys()) {
			yield [name, this.get(name)];
		}
	}

	[Symbol.iterator]() {
		return this.entries();
	}

	/**
	 * Node-fetch non-spec method
	 * returning all headers and their values as array
	 * @returns {Record<string, string[]>}
	 */
	raw() {
		return [...this.keys()].reduce((result, key) => {
			result[key] = this.getAll(key);
			return result;
		}, {});
	}

	/**
	 * For better console.log(headers) and also to convert Headers into Node.js Request compatible format
	 */
	[Symbol.for('nodejs.util.inspect.custom')]() {
		return [...this.keys()].reduce((result, key) => {
			const values = this.getAll(key);
			// Http.request() only supports string as Host header.
			// This hack makes specifying custom Host header possible.
			if (key === 'host') {
				result[key] = values[0];
			} else {
				result[key] = values.length > 1 ? values : values[0];
			}

			return result;
		}, {});
	}
}

/**
 * Re-shaping object for Web IDL tests
 * Only need to do it for overridden methods
 */
Object.defineProperties(
	Headers.prototype,
	['get', 'entries', 'forEach', 'values'].reduce((result, property) => {
		result[property] = {enumerable: true};
		return result;
	}, {})
);

/**
 * Create a Headers object from an http.IncomingMessage.rawHeaders, ignoring those that do
 * not conform to HTTP grammar productions.
 * @param {import('http').IncomingMessage['rawHeaders']} headers
 */
function fromRawHeaders(headers = []) {
	return new Headers(
		headers
			// Split into pairs
			.reduce((result, value, index, array) => {
				if (index % 2 === 0) {
					result.push(array.slice(index, index + 2));
				}

				return result;
			}, [])
			.filter(([name, value]) => {
				try {
					validateHeaderName(name);
					validateHeaderValue(name, String(value));
					return true;
				} catch {
					return false;
				}
			})

	);
}

const redirectStatus = new Set([301, 302, 303, 307, 308]);

/**
 * Redirect code matching
 *
 * @param {number} code - Status code
 * @return {boolean}
 */
const isRedirect = code => {
	return redirectStatus.has(code);
};

/**
 * Response.js
 *
 * Response class provides content decoding
 */

const INTERNALS$1 = Symbol('Response internals');

/**
 * Response class
 *
 * Ref: https://fetch.spec.whatwg.org/#response-class
 *
 * @param   Stream  body  Readable stream
 * @param   Object  opts  Response options
 * @return  Void
 */
class Response extends Body {
	constructor(body = null, options = {}) {
		super(body, options);

		// eslint-disable-next-line no-eq-null, eqeqeq, no-negated-condition
		const status = options.status != null ? options.status : 200;

		const headers = new Headers(options.headers);

		if (body !== null && !headers.has('Content-Type')) {
			const contentType = extractContentType(body, this);
			if (contentType) {
				headers.append('Content-Type', contentType);
			}
		}

		this[INTERNALS$1] = {
			type: 'default',
			url: options.url,
			status,
			statusText: options.statusText || '',
			headers,
			counter: options.counter,
			highWaterMark: options.highWaterMark
		};
	}

	get type() {
		return this[INTERNALS$1].type;
	}

	get url() {
		return this[INTERNALS$1].url || '';
	}

	get status() {
		return this[INTERNALS$1].status;
	}

	/**
	 * Convenience property representing if the request ended normally
	 */
	get ok() {
		return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
	}

	get redirected() {
		return this[INTERNALS$1].counter > 0;
	}

	get statusText() {
		return this[INTERNALS$1].statusText;
	}

	get headers() {
		return this[INTERNALS$1].headers;
	}

	get highWaterMark() {
		return this[INTERNALS$1].highWaterMark;
	}

	/**
	 * Clone this response
	 *
	 * @return  Response
	 */
	clone() {
		return new Response(clone(this, this.highWaterMark), {
			type: this.type,
			url: this.url,
			status: this.status,
			statusText: this.statusText,
			headers: this.headers,
			ok: this.ok,
			redirected: this.redirected,
			size: this.size,
			highWaterMark: this.highWaterMark
		});
	}

	/**
	 * @param {string} url    The URL that the new response is to originate from.
	 * @param {number} status An optional status code for the response (e.g., 302.)
	 * @returns {Response}    A Response object.
	 */
	static redirect(url, status = 302) {
		if (!isRedirect(status)) {
			throw new RangeError('Failed to execute "redirect" on "response": Invalid status code');
		}

		return new Response(null, {
			headers: {
				location: new URL(url).toString()
			},
			status
		});
	}

	static error() {
		const response = new Response(null, {status: 0, statusText: ''});
		response[INTERNALS$1].type = 'error';
		return response;
	}

	get [Symbol.toStringTag]() {
		return 'Response';
	}
}

Object.defineProperties(Response.prototype, {
	type: {enumerable: true},
	url: {enumerable: true},
	status: {enumerable: true},
	ok: {enumerable: true},
	redirected: {enumerable: true},
	statusText: {enumerable: true},
	headers: {enumerable: true},
	clone: {enumerable: true}
});

const getSearch = parsedURL => {
	if (parsedURL.search) {
		return parsedURL.search;
	}

	const lastOffset = parsedURL.href.length - 1;
	const hash = parsedURL.hash || (parsedURL.href[lastOffset] === '#' ? '#' : '');
	return parsedURL.href[lastOffset - hash.length] === '?' ? '?' : '';
};

/**
 * @external URL
 * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/URL|URL}
 */

/**
 * @module utils/referrer
 * @private
 */

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#strip-url|Referrer Policy §8.4. Strip url for use as a referrer}
 * @param {string} URL
 * @param {boolean} [originOnly=false]
 */
function stripURLForUseAsAReferrer(url, originOnly = false) {
	// 1. If url is null, return no referrer.
	if (url == null) { // eslint-disable-line no-eq-null, eqeqeq
		return 'no-referrer';
	}

	url = new URL(url);

	// 2. If url's scheme is a local scheme, then return no referrer.
	if (/^(about|blob|data):$/.test(url.protocol)) {
		return 'no-referrer';
	}

	// 3. Set url's username to the empty string.
	url.username = '';

	// 4. Set url's password to null.
	// Note: `null` appears to be a mistake as this actually results in the password being `"null"`.
	url.password = '';

	// 5. Set url's fragment to null.
	// Note: `null` appears to be a mistake as this actually results in the fragment being `"#null"`.
	url.hash = '';

	// 6. If the origin-only flag is true, then:
	if (originOnly) {
		// 6.1. Set url's path to null.
		// Note: `null` appears to be a mistake as this actually results in the path being `"/null"`.
		url.pathname = '';

		// 6.2. Set url's query to null.
		// Note: `null` appears to be a mistake as this actually results in the query being `"?null"`.
		url.search = '';
	}

	// 7. Return url.
	return url;
}

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#enumdef-referrerpolicy|enum ReferrerPolicy}
 */
const ReferrerPolicy = new Set([
	'',
	'no-referrer',
	'no-referrer-when-downgrade',
	'same-origin',
	'origin',
	'strict-origin',
	'origin-when-cross-origin',
	'strict-origin-when-cross-origin',
	'unsafe-url'
]);

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#default-referrer-policy|default referrer policy}
 */
const DEFAULT_REFERRER_POLICY = 'strict-origin-when-cross-origin';

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#referrer-policies|Referrer Policy §3. Referrer Policies}
 * @param {string} referrerPolicy
 * @returns {string} referrerPolicy
 */
function validateReferrerPolicy(referrerPolicy) {
	if (!ReferrerPolicy.has(referrerPolicy)) {
		throw new TypeError(`Invalid referrerPolicy: ${referrerPolicy}`);
	}

	return referrerPolicy;
}

/**
 * @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-origin-trustworthy|Referrer Policy §3.2. Is origin potentially trustworthy?}
 * @param {external:URL} url
 * @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy"
 */
function isOriginPotentiallyTrustworthy(url) {
	// 1. If origin is an opaque origin, return "Not Trustworthy".
	// Not applicable

	// 2. Assert: origin is a tuple origin.
	// Not for implementations

	// 3. If origin's scheme is either "https" or "wss", return "Potentially Trustworthy".
	if (/^(http|ws)s:$/.test(url.protocol)) {
		return true;
	}

	// 4. If origin's host component matches one of the CIDR notations 127.0.0.0/8 or ::1/128 [RFC4632], return "Potentially Trustworthy".
	const hostIp = url.host.replace(/(^\[)|(]$)/g, '');
	const hostIPVersion = isIP(hostIp);

	if (hostIPVersion === 4 && /^127\./.test(hostIp)) {
		return true;
	}

	if (hostIPVersion === 6 && /^(((0+:){7})|(::(0+:){0,6}))0*1$/.test(hostIp)) {
		return true;
	}

	// 5. If origin's host component is "localhost" or falls within ".localhost", and the user agent conforms to the name resolution rules in [let-localhost-be-localhost], return "Potentially Trustworthy".
	// We are returning FALSE here because we cannot ensure conformance to
	// let-localhost-be-loalhost (https://tools.ietf.org/html/draft-west-let-localhost-be-localhost)
	if (/^(.+\.)*localhost$/.test(url.host)) {
		return false;
	}

	// 6. If origin's scheme component is file, return "Potentially Trustworthy".
	if (url.protocol === 'file:') {
		return true;
	}

	// 7. If origin's scheme component is one which the user agent considers to be authenticated, return "Potentially Trustworthy".
	// Not supported

	// 8. If origin has been configured as a trustworthy origin, return "Potentially Trustworthy".
	// Not supported

	// 9. Return "Not Trustworthy".
	return false;
}

/**
 * @see {@link https://w3c.github.io/webappsec-secure-contexts/#is-url-trustworthy|Referrer Policy §3.3. Is url potentially trustworthy?}
 * @param {external:URL} url
 * @returns `true`: "Potentially Trustworthy", `false`: "Not Trustworthy"
 */
function isUrlPotentiallyTrustworthy(url) {
	// 1. If url is "about:blank" or "about:srcdoc", return "Potentially Trustworthy".
	if (/^about:(blank|srcdoc)$/.test(url)) {
		return true;
	}

	// 2. If url's scheme is "data", return "Potentially Trustworthy".
	if (url.protocol === 'data:') {
		return true;
	}

	// Note: The origin of blob: and filesystem: URLs is the origin of the context in which they were
	// created. Therefore, blobs created in a trustworthy origin will themselves be potentially
	// trustworthy.
	if (/^(blob|filesystem):$/.test(url.protocol)) {
		return true;
	}

	// 3. Return the result of executing §3.2 Is origin potentially trustworthy? on url's origin.
	return isOriginPotentiallyTrustworthy(url);
}

/**
 * Modifies the referrerURL to enforce any extra security policy considerations.
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7
 * @callback module:utils/referrer~referrerURLCallback
 * @param {external:URL} referrerURL
 * @returns {external:URL} modified referrerURL
 */

/**
 * Modifies the referrerOrigin to enforce any extra security policy considerations.
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}, step 7
 * @callback module:utils/referrer~referrerOriginCallback
 * @param {external:URL} referrerOrigin
 * @returns {external:URL} modified referrerOrigin
 */

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#determine-requests-referrer|Referrer Policy §8.3. Determine request's Referrer}
 * @param {Request} request
 * @param {object} o
 * @param {module:utils/referrer~referrerURLCallback} o.referrerURLCallback
 * @param {module:utils/referrer~referrerOriginCallback} o.referrerOriginCallback
 * @returns {external:URL} Request's referrer
 */
function determineRequestsReferrer(request, {referrerURLCallback, referrerOriginCallback} = {}) {
	// There are 2 notes in the specification about invalid pre-conditions.  We return null, here, for
	// these cases:
	// > Note: If request's referrer is "no-referrer", Fetch will not call into this algorithm.
	// > Note: If request's referrer policy is the empty string, Fetch will not call into this
	// > algorithm.
	if (request.referrer === 'no-referrer' || request.referrerPolicy === '') {
		return null;
	}

	// 1. Let policy be request's associated referrer policy.
	const policy = request.referrerPolicy;

	// 2. Let environment be request's client.
	// not applicable to node.js

	// 3. Switch on request's referrer:
	if (request.referrer === 'about:client') {
		return 'no-referrer';
	}

	// "a URL": Let referrerSource be request's referrer.
	const referrerSource = request.referrer;

	// 4. Let request's referrerURL be the result of stripping referrerSource for use as a referrer.
	let referrerURL = stripURLForUseAsAReferrer(referrerSource);

	// 5. Let referrerOrigin be the result of stripping referrerSource for use as a referrer, with the
	//    origin-only flag set to true.
	let referrerOrigin = stripURLForUseAsAReferrer(referrerSource, true);

	// 6. If the result of serializing referrerURL is a string whose length is greater than 4096, set
	//    referrerURL to referrerOrigin.
	if (referrerURL.toString().length > 4096) {
		referrerURL = referrerOrigin;
	}

	// 7. The user agent MAY alter referrerURL or referrerOrigin at this point to enforce arbitrary
	//    policy considerations in the interests of minimizing data leakage. For example, the user
	//    agent could strip the URL down to an origin, modify its host, replace it with an empty
	//    string, etc.
	if (referrerURLCallback) {
		referrerURL = referrerURLCallback(referrerURL);
	}

	if (referrerOriginCallback) {
		referrerOrigin = referrerOriginCallback(referrerOrigin);
	}

	// 8.Execute the statements corresponding to the value of policy:
	const currentURL = new URL(request.url);

	switch (policy) {
		case 'no-referrer':
			return 'no-referrer';

		case 'origin':
			return referrerOrigin;

		case 'unsafe-url':
			return referrerURL;

		case 'strict-origin':
			// 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a
			//    potentially trustworthy URL, then return no referrer.
			if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
				return 'no-referrer';
			}

			// 2. Return referrerOrigin.
			return referrerOrigin.toString();

		case 'strict-origin-when-cross-origin':
			// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
			//    return referrerURL.
			if (referrerURL.origin === currentURL.origin) {
				return referrerURL;
			}

			// 2. If referrerURL is a potentially trustworthy URL and request's current URL is not a
			//    potentially trustworthy URL, then return no referrer.
			if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
				return 'no-referrer';
			}

			// 3. Return referrerOrigin.
			return referrerOrigin;

		case 'same-origin':
			// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
			//    return referrerURL.
			if (referrerURL.origin === currentURL.origin) {
				return referrerURL;
			}

			// 2. Return no referrer.
			return 'no-referrer';

		case 'origin-when-cross-origin':
			// 1. If the origin of referrerURL and the origin of request's current URL are the same, then
			//    return referrerURL.
			if (referrerURL.origin === currentURL.origin) {
				return referrerURL;
			}

			// Return referrerOrigin.
			return referrerOrigin;

		case 'no-referrer-when-downgrade':
			// 1. If referrerURL is a potentially trustworthy URL and request's current URL is not a
			//    potentially trustworthy URL, then return no referrer.
			if (isUrlPotentiallyTrustworthy(referrerURL) && !isUrlPotentiallyTrustworthy(currentURL)) {
				return 'no-referrer';
			}

			// 2. Return referrerURL.
			return referrerURL;

		default:
			throw new TypeError(`Invalid referrerPolicy: ${policy}`);
	}
}

/**
 * @see {@link https://w3c.github.io/webappsec-referrer-policy/#parse-referrer-policy-from-header|Referrer Policy §8.1. Parse a referrer policy from a Referrer-Policy header}
 * @param {Headers} headers Response headers
 * @returns {string} policy
 */
function parseReferrerPolicyFromHeader(headers) {
	// 1. Let policy-tokens be the result of extracting header list values given `Referrer-Policy`
	//    and response’s header list.
	const policyTokens = (headers.get('referrer-policy') || '').split(/[,\s]+/);

	// 2. Let policy be the empty string.
	let policy = '';

	// 3. For each token in policy-tokens, if token is a referrer policy and token is not the empty
	//    string, then set policy to token.
	// Note: This algorithm loops over multiple policy values to allow deployment of new policy
	// values with fallbacks for older user agents, as described in § 11.1 Unknown Policy Values.
	for (const token of policyTokens) {
		if (token && ReferrerPolicy.has(token)) {
			policy = token;
		}
	}

	// 4. Return policy.
	return policy;
}

/**
 * Request.js
 *
 * Request class contains server only options
 *
 * All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/.
 */

const INTERNALS = Symbol('Request internals');

/**
 * Check if `obj` is an instance of Request.
 *
 * @param  {*} object
 * @return {boolean}
 */
const isRequest = object => {
	return (
		typeof object === 'object' &&
		typeof object[INTERNALS] === 'object'
	);
};

const doBadDataWarn = deprecate(() => {},
	'.data is not a valid RequestInit property, use .body instead',
	'https://github.com/node-fetch/node-fetch/issues/1000 (request)');

/**
 * Request class
 *
 * Ref: https://fetch.spec.whatwg.org/#request-class
 *
 * @param   Mixed   input  Url or Request instance
 * @param   Object  init   Custom options
 * @return  Void
 */
class Request extends Body {
	constructor(input, init = {}) {
		let parsedURL;

		// Normalize input and force URL to be encoded as UTF-8 (https://github.com/node-fetch/node-fetch/issues/245)
		if (isRequest(input)) {
			parsedURL = new URL(input.url);
		} else {
			parsedURL = new URL(input);
			input = {};
		}

		if (parsedURL.username !== '' || parsedURL.password !== '') {
			throw new TypeError(`${parsedURL} is an url with embedded credentials.`);
		}

		let method = init.method || input.method || 'GET';
		method = method.toUpperCase();

		if ('data' in init) {
			doBadDataWarn();
		}

		// eslint-disable-next-line no-eq-null, eqeqeq
		if ((init.body != null || (isRequest(input) && input.body !== null)) &&
			(method === 'GET' || method === 'HEAD')) {
			throw new TypeError('Request with GET/HEAD method cannot have body');
		}

		const inputBody = init.body ?
			init.body :
			(isRequest(input) && input.body !== null ?
				clone(input) :
				null);

		super(inputBody, {
			size: init.size || input.size || 0
		});

		const headers = new Headers(init.headers || input.headers || {});

		if (inputBody !== null && !headers.has('Content-Type')) {
			const contentType = extractContentType(inputBody, this);
			if (contentType) {
				headers.set('Content-Type', contentType);
			}
		}

		let signal = isRequest(input) ?
			input.signal :
			null;
		if ('signal' in init) {
			signal = init.signal;
		}

		// eslint-disable-next-line no-eq-null, eqeqeq
		if (signal != null && !isAbortSignal(signal)) {
			throw new TypeError('Expected signal to be an instanceof AbortSignal or EventTarget');
		}

		// §5.4, Request constructor steps, step 15.1
		// eslint-disable-next-line no-eq-null, eqeqeq
		let referrer = init.referrer == null ? input.referrer : init.referrer;
		if (referrer === '') {
			// §5.4, Request constructor steps, step 15.2
			referrer = 'no-referrer';
		} else if (referrer) {
			// §5.4, Request constructor steps, step 15.3.1, 15.3.2
			const parsedReferrer = new URL(referrer);
			// §5.4, Request constructor steps, step 15.3.3, 15.3.4
			referrer = /^about:(\/\/)?client$/.test(parsedReferrer) ? 'client' : parsedReferrer;
		} else {
			referrer = undefined;
		}

		this[INTERNALS] = {
			method,
			redirect: init.redirect || input.redirect || 'follow',
			headers,
			parsedURL,
			signal,
			referrer
		};

		// Node-fetch-only options
		this.follow = init.follow === undefined ? (input.follow === undefined ? 20 : input.follow) : init.follow;
		this.compress = init.compress === undefined ? (input.compress === undefined ? true : input.compress) : init.compress;
		this.counter = init.counter || input.counter || 0;
		this.agent = init.agent || input.agent;
		this.highWaterMark = init.highWaterMark || input.highWaterMark || 16384;
		this.insecureHTTPParser = init.insecureHTTPParser || input.insecureHTTPParser || false;

		// §5.4, Request constructor steps, step 16.
		// Default is empty string per https://fetch.spec.whatwg.org/#concept-request-referrer-policy
		this.referrerPolicy = init.referrerPolicy || input.referrerPolicy || '';
	}

	/** @returns {string} */
	get method() {
		return this[INTERNALS].method;
	}

	/** @returns {string} */
	get url() {
		return format$1(this[INTERNALS].parsedURL);
	}

	/** @returns {Headers} */
	get headers() {
		return this[INTERNALS].headers;
	}

	get redirect() {
		return this[INTERNALS].redirect;
	}

	/** @returns {AbortSignal} */
	get signal() {
		return this[INTERNALS].signal;
	}

	// https://fetch.spec.whatwg.org/#dom-request-referrer
	get referrer() {
		if (this[INTERNALS].referrer === 'no-referrer') {
			return '';
		}

		if (this[INTERNALS].referrer === 'client') {
			return 'about:client';
		}

		if (this[INTERNALS].referrer) {
			return this[INTERNALS].referrer.toString();
		}

		return undefined;
	}

	get referrerPolicy() {
		return this[INTERNALS].referrerPolicy;
	}

	set referrerPolicy(referrerPolicy) {
		this[INTERNALS].referrerPolicy = validateReferrerPolicy(referrerPolicy);
	}

	/**
	 * Clone this request
	 *
	 * @return  Request
	 */
	clone() {
		return new Request(this);
	}

	get [Symbol.toStringTag]() {
		return 'Request';
	}
}

Object.defineProperties(Request.prototype, {
	method: {enumerable: true},
	url: {enumerable: true},
	headers: {enumerable: true},
	redirect: {enumerable: true},
	clone: {enumerable: true},
	signal: {enumerable: true},
	referrer: {enumerable: true},
	referrerPolicy: {enumerable: true}
});

/**
 * Convert a Request to Node.js http request options.
 *
 * @param {Request} request - A Request instance
 * @return The options object to be passed to http.request
 */
const getNodeRequestOptions = request => {
	const {parsedURL} = request[INTERNALS];
	const headers = new Headers(request[INTERNALS].headers);

	// Fetch step 1.3
	if (!headers.has('Accept')) {
		headers.set('Accept', '*/*');
	}

	// HTTP-network-or-cache fetch steps 2.4-2.7
	let contentLengthValue = null;
	if (request.body === null && /^(post|put)$/i.test(request.method)) {
		contentLengthValue = '0';
	}

	if (request.body !== null) {
		const totalBytes = getTotalBytes(request);
		// Set Content-Length if totalBytes is a number (that is not NaN)
		if (typeof totalBytes === 'number' && !Number.isNaN(totalBytes)) {
			contentLengthValue = String(totalBytes);
		}
	}

	if (contentLengthValue) {
		headers.set('Content-Length', contentLengthValue);
	}

	// 4.1. Main fetch, step 2.6
	// > If request's referrer policy is the empty string, then set request's referrer policy to the
	// > default referrer policy.
	if (request.referrerPolicy === '') {
		request.referrerPolicy = DEFAULT_REFERRER_POLICY;
	}

	// 4.1. Main fetch, step 2.7
	// > If request's referrer is not "no-referrer", set request's referrer to the result of invoking
	// > determine request's referrer.
	if (request.referrer && request.referrer !== 'no-referrer') {
		request[INTERNALS].referrer = determineRequestsReferrer(request);
	} else {
		request[INTERNALS].referrer = 'no-referrer';
	}

	// 4.5. HTTP-network-or-cache fetch, step 6.9
	// > If httpRequest's referrer is a URL, then append `Referer`/httpRequest's referrer, serialized
	// >  and isomorphic encoded, to httpRequest's header list.
	if (request[INTERNALS].referrer instanceof URL) {
		headers.set('Referer', request.referrer);
	}

	// HTTP-network-or-cache fetch step 2.11
	if (!headers.has('User-Agent')) {
		headers.set('User-Agent', 'node-fetch');
	}

	// HTTP-network-or-cache fetch step 2.15
	if (request.compress && !headers.has('Accept-Encoding')) {
		headers.set('Accept-Encoding', 'gzip,deflate,br');
	}

	let {agent} = request;
	if (typeof agent === 'function') {
		agent = agent(parsedURL);
	}

	if (!headers.has('Connection') && !agent) {
		headers.set('Connection', 'close');
	}

	// HTTP-network fetch step 4.2
	// chunked encoding is handled by Node.js

	const search = getSearch(parsedURL);

	// Pass the full URL directly to request(), but overwrite the following
	// options:
	const options = {
		// Overwrite search to retain trailing ? (issue #776)
		path: parsedURL.pathname + search,
		// The following options are not expressed in the URL
		method: request.method,
		headers: headers[Symbol.for('nodejs.util.inspect.custom')](),
		insecureHTTPParser: request.insecureHTTPParser,
		agent
	};

	return {
		/** @type {URL} */
		parsedURL,
		options
	};
};

/**
 * AbortError interface for cancelled requests
 */
class AbortError extends FetchBaseError {
	constructor(message, type = 'aborted') {
		super(message, type);
	}
}

/**
 * Index.js
 *
 * a request API compatible with window.fetch
 *
 * All spec algorithm step numbers are based on https://fetch.spec.whatwg.org/commit-snapshots/ae716822cb3a61843226cd090eefc6589446c1d2/.
 */

const supportedSchemas = new Set(['data:', 'http:', 'https:']);

/**
 * Fetch function
 *
 * @param   {string | URL | import('./request').default} url - Absolute url or Request instance
 * @param   {*} [options_] - Fetch options
 * @return  {Promise<import('./response').default>}
 */
async function fetch$1(url, options_) {
	return new Promise((resolve, reject) => {
		// Build request object
		const request = new Request(url, options_);
		const {parsedURL, options} = getNodeRequestOptions(request);
		if (!supportedSchemas.has(parsedURL.protocol)) {
			throw new TypeError(`node-fetch cannot load ${url}. URL scheme "${parsedURL.protocol.replace(/:$/, '')}" is not supported.`);
		}

		if (parsedURL.protocol === 'data:') {
			const data = dataUriToBuffer(request.url);
			const response = new Response(data, {headers: {'Content-Type': data.typeFull}});
			resolve(response);
			return;
		}

		// Wrap http.request into fetch
		const send = (parsedURL.protocol === 'https:' ? https : http).request;
		const {signal} = request;
		let response = null;

		const abort = () => {
			const error = new AbortError('The operation was aborted.');
			reject(error);
			if (request.body && request.body instanceof Stream.Readable) {
				request.body.destroy(error);
			}

			if (!response || !response.body) {
				return;
			}

			response.body.emit('error', error);
		};

		if (signal && signal.aborted) {
			abort();
			return;
		}

		const abortAndFinalize = () => {
			abort();
			finalize();
		};

		// Send request
		const request_ = send(parsedURL.toString(), options);

		if (signal) {
			signal.addEventListener('abort', abortAndFinalize);
		}

		const finalize = () => {
			request_.abort();
			if (signal) {
				signal.removeEventListener('abort', abortAndFinalize);
			}
		};

		request_.on('error', error => {
			reject(new FetchError(`request to ${request.url} failed, reason: ${error.message}`, 'system', error));
			finalize();
		});

		fixResponseChunkedTransferBadEnding(request_, error => {
			response.body.destroy(error);
		});

		/* c8 ignore next 18 */
		if (process.version < 'v14') {
			// Before Node.js 14, pipeline() does not fully support async iterators and does not always
			// properly handle when the socket close/end events are out of order.
			request_.on('socket', s => {
				let endedWithEventsCount;
				s.prependListener('end', () => {
					endedWithEventsCount = s._eventsCount;
				});
				s.prependListener('close', hadError => {
					// if end happened before close but the socket didn't emit an error, do it now
					if (response && endedWithEventsCount < s._eventsCount && !hadError) {
						const error = new Error('Premature close');
						error.code = 'ERR_STREAM_PREMATURE_CLOSE';
						response.body.emit('error', error);
					}
				});
			});
		}

		request_.on('response', response_ => {
			request_.setTimeout(0);
			const headers = fromRawHeaders(response_.rawHeaders);

			// HTTP fetch step 5
			if (isRedirect(response_.statusCode)) {
				// HTTP fetch step 5.2
				const location = headers.get('Location');

				// HTTP fetch step 5.3
				let locationURL = null;
				try {
					locationURL = location === null ? null : new URL(location, request.url);
				} catch {
					// error here can only be invalid URL in Location: header
					// do not throw when options.redirect == manual
					// let the user extract the errorneous redirect URL
					if (request.redirect !== 'manual') {
						reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
						finalize();
						return;
					}
				}

				// HTTP fetch step 5.5
				switch (request.redirect) {
					case 'error':
						reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
						finalize();
						return;
					case 'manual':
						// Nothing to do
						break;
					case 'follow': {
						// HTTP-redirect fetch step 2
						if (locationURL === null) {
							break;
						}

						// HTTP-redirect fetch step 5
						if (request.counter >= request.follow) {
							reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
							finalize();
							return;
						}

						// HTTP-redirect fetch step 6 (counter increment)
						// Create a new Request object.
						const requestOptions = {
							headers: new Headers(request.headers),
							follow: request.follow,
							counter: request.counter + 1,
							agent: request.agent,
							compress: request.compress,
							method: request.method,
							body: clone(request),
							signal: request.signal,
							size: request.size,
							referrer: request.referrer,
							referrerPolicy: request.referrerPolicy
						};

						// when forwarding sensitive headers like "Authorization",
						// "WWW-Authenticate", and "Cookie" to untrusted targets,
						// headers will be ignored when following a redirect to a domain
						// that is not a subdomain match or exact match of the initial domain.
						// For example, a redirect from "foo.com" to either "foo.com" or "sub.foo.com"
						// will forward the sensitive headers, but a redirect to "bar.com" will not.
						if (!isDomainOrSubdomain(request.url, locationURL)) {
							for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) {
								requestOptions.headers.delete(name);
							}
						}

						// HTTP-redirect fetch step 9
						if (response_.statusCode !== 303 && request.body && options_.body instanceof Stream.Readable) {
							reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
							finalize();
							return;
						}

						// HTTP-redirect fetch step 11
						if (response_.statusCode === 303 || ((response_.statusCode === 301 || response_.statusCode === 302) && request.method === 'POST')) {
							requestOptions.method = 'GET';
							requestOptions.body = undefined;
							requestOptions.headers.delete('content-length');
						}

						// HTTP-redirect fetch step 14
						const responseReferrerPolicy = parseReferrerPolicyFromHeader(headers);
						if (responseReferrerPolicy) {
							requestOptions.referrerPolicy = responseReferrerPolicy;
						}

						// HTTP-redirect fetch step 15
						resolve(fetch$1(new Request(locationURL, requestOptions)));
						finalize();
						return;
					}

					default:
						return reject(new TypeError(`Redirect option '${request.redirect}' is not a valid value of RequestRedirect`));
				}
			}

			// Prepare response
			if (signal) {
				response_.once('end', () => {
					signal.removeEventListener('abort', abortAndFinalize);
				});
			}

			let body = pipeline$1(response_, new PassThrough(), error => {
				if (error) {
					reject(error);
				}
			});
			// see https://github.com/nodejs/node/pull/29376
			/* c8 ignore next 3 */
			if (process.version < 'v12.10') {
				response_.on('aborted', abortAndFinalize);
			}

			const responseOptions = {
				url: request.url,
				status: response_.statusCode,
				statusText: response_.statusMessage,
				headers,
				size: request.size,
				counter: request.counter,
				highWaterMark: request.highWaterMark
			};

			// HTTP-network fetch step 12.1.1.3
			const codings = headers.get('Content-Encoding');

			// HTTP-network fetch step 12.1.1.4: handle content codings

			// in following scenarios we ignore compression support
			// 1. compression support is disabled
			// 2. HEAD request
			// 3. no Content-Encoding header
			// 4. no content response (204)
			// 5. content not modified response (304)
			if (!request.compress || request.method === 'HEAD' || codings === null || response_.statusCode === 204 || response_.statusCode === 304) {
				response = new Response(body, responseOptions);
				resolve(response);
				return;
			}

			// For Node v6+
			// Be less strict when decoding compressed responses, since sometimes
			// servers send slightly invalid responses that are still accepted
			// by common browsers.
			// Always using Z_SYNC_FLUSH is what cURL does.
			const zlibOptions = {
				flush: zlib.Z_SYNC_FLUSH,
				finishFlush: zlib.Z_SYNC_FLUSH
			};

			// For gzip
			if (codings === 'gzip' || codings === 'x-gzip') {
				body = pipeline$1(body, zlib.createGunzip(zlibOptions), error => {
					if (error) {
						reject(error);
					}
				});
				response = new Response(body, responseOptions);
				resolve(response);
				return;
			}

			// For deflate
			if (codings === 'deflate' || codings === 'x-deflate') {
				// Handle the infamous raw deflate response from old servers
				// a hack for old IIS and Apache servers
				const raw = pipeline$1(response_, new PassThrough(), error => {
					if (error) {
						reject(error);
					}
				});
				raw.once('data', chunk => {
					// See http://stackoverflow.com/questions/37519828
					if ((chunk[0] & 0x0F) === 0x08) {
						body = pipeline$1(body, zlib.createInflate(), error => {
							if (error) {
								reject(error);
							}
						});
					} else {
						body = pipeline$1(body, zlib.createInflateRaw(), error => {
							if (error) {
								reject(error);
							}
						});
					}

					response = new Response(body, responseOptions);
					resolve(response);
				});
				raw.once('end', () => {
					// Some old IIS servers return zero-length OK deflate responses, so
					// 'data' is never emitted. See https://github.com/node-fetch/node-fetch/pull/903
					if (!response) {
						response = new Response(body, responseOptions);
						resolve(response);
					}
				});
				return;
			}

			// For br
			if (codings === 'br') {
				body = pipeline$1(body, zlib.createBrotliDecompress(), error => {
					if (error) {
						reject(error);
					}
				});
				response = new Response(body, responseOptions);
				resolve(response);
				return;
			}

			// Otherwise, use response as-is
			response = new Response(body, responseOptions);
			resolve(response);
		});

		// eslint-disable-next-line promise/prefer-await-to-then
		writeToStream(request_, request).catch(reject);
	});
}

function fixResponseChunkedTransferBadEnding(request, errorCallback) {
	const LAST_CHUNK = Buffer.from('0\r\n\r\n');

	let isChunkedTransfer = false;
	let properLastChunkReceived = false;
	let previousChunk;

	request.on('response', response => {
		const {headers} = response;
		isChunkedTransfer = headers['transfer-encoding'] === 'chunked' && !headers['content-length'];
	});

	request.on('socket', socket => {
		const onSocketClose = () => {
			if (isChunkedTransfer && !properLastChunkReceived) {
				const error = new Error('Premature close');
				error.code = 'ERR_STREAM_PREMATURE_CLOSE';
				errorCallback(error);
			}
		};

		socket.prependListener('close', onSocketClose);

		request.on('abort', () => {
			socket.removeListener('close', onSocketClose);
		});

		socket.on('data', buf => {
			properLastChunkReceived = Buffer.compare(buf.slice(-5), LAST_CHUNK) === 0;

			// Sometimes final 0-length chunk and end of message code are in separate packets
			if (!properLastChunkReceived && previousChunk) {
				properLastChunkReceived = (
					Buffer.compare(previousChunk.slice(-3), LAST_CHUNK.slice(0, 3)) === 0 &&
					Buffer.compare(buf.slice(-2), LAST_CHUNK.slice(3)) === 0
				);
			}

			previousChunk = buf;
		});
	});
}

const fetch = {
    fetch(resource, init) {
        const resourceURL = new URL(__object_isPrototypeOf(Request.prototype, resource)
            ? resource.url
            : pathToPosix(resource), typeof Object(globalThis.process).cwd === 'function' ? 'file:' + pathToPosix(process.cwd()) + '/' : 'file:');
        if (resourceURL.protocol.toLowerCase() === 'file:') {
            return import('node:fs').then(fs => {
                try {
                    const stats = fs.statSync(resourceURL);
                    const body = fs.createReadStream(resourceURL);
                    return new Response(body, {
                        status: 200,
                        statusText: '',
                        headers: {
                            'content-length': String(stats.size),
                            'date': new Date().toUTCString(),
                            'last-modified': new Date(stats.mtimeMs).toUTCString(),
                        }
                    });
                }
                catch (error) {
                    const body = new Stream.Readable();
                    body._read = () => { };
                    body.push(null);
                    return new Response(body, {
                        status: 404,
                        statusText: '',
                        headers: {
                            'date': new Date().toUTCString(),
                        }
                    });
                }
            });
        }
        else {
            return fetch$1(resource, init);
        }
    }
}.fetch;

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objects must have a [Symbol.iterator]() method.")}var 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T(u){if(""===u)return u;var D=new URL("https://example.com");return D.hash=u,D.hash.substring(1,D.hash.length)}!function(u){u[u.INIT=0]="INIT",u[u.PROTOCOL=1]="PROTOCOL",u[u.AUTHORITY=2]="AUTHORITY",u[u.USERNAME=3]="USERNAME",u[u.PASSWORD=4]="PASSWORD",u[u.HOSTNAME=5]="HOSTNAME",u[u.PORT=6]="PORT",u[u.PATHNAME=7]="PATHNAME",u[u.SEARCH=8]="SEARCH",u[u.HASH=9]="HASH",u[u.DONE=10]="DONE";}(f$1||(f$1={}));var b=function(){function u(u){this.input=void 0,this.tokenList=[],this.internalResult={},this.tokenIndex=0,this.tokenIncrement=1,this.componentStart=0,this.state=f$1.INIT,this.groupDepth=0,this.hostnameIPv6BracketDepth=0,this.shouldTreatAsStandardURL=!1,this.input=u;}var t=u.prototype;return t.parse=function(){for(this.tokenList=E(this.input,!0);this.tokenIndex<this.tokenList.length;this.tokenIndex+=this.tokenIncrement){if(this.tokenIncrement=1,"END"===this.tokenList[this.tokenIndex].type){if(this.state===f$1.INIT){this.rewind(),this.isHashPrefix()?this.changeState(f$1.HASH,1):this.isSearchPrefix()?(this.changeState(f$1.SEARCH,1),this.internalResult.hash=""):(this.changeState(f$1.PATHNAME,0),this.internalResult.search="",this.internalResult.hash="");continue}if(this.state===f$1.AUTHORITY){this.rewindAndSetState(f$1.HOSTNAME);continue}this.changeState(f$1.DONE,0);break}if(this.groupDepth>0){if(!this.isGroupClose())continue;this.groupDepth-=1;}if(this.isGroupOpen())this.groupDepth+=1;else switch(this.state){case f$1.INIT:this.isProtocolSuffix()&&(this.internalResult.username="",this.internalResult.password="",this.internalResult.hostname="",this.internalResult.port="",this.internalResult.pathname="",this.internalResult.search="",this.internalResult.hash="",this.rewindAndSetState(f$1.PROTOCOL));break;case f$1.PROTOCOL:if(this.isProtocolSuffix()){this.computeShouldTreatAsStandardURL();var u=f$1.PATHNAME,D=1;this.shouldTreatAsStandardURL&&(this.internalResult.pathname="/"),this.nextIsAuthoritySlashes()?(u=f$1.AUTHORITY,D=3):this.shouldTreatAsStandardURL&&(u=f$1.AUTHORITY),this.changeState(u,D);}break;case f$1.AUTHORITY:this.isIdentityTerminator()?this.rewindAndSetState(f$1.USERNAME):(this.isPathnameStart()||this.isSearchPrefix()||this.isHashPrefix())&&this.rewindAndSetState(f$1.HOSTNAME);break;case f$1.USERNAME:this.isPasswordPrefix()?this.changeState(f$1.PASSWORD,1):this.isIdentityTerminator()&&this.changeState(f$1.HOSTNAME,1);break;case f$1.PASSWORD:this.isIdentityTerminator()&&this.changeState(f$1.HOSTNAME,1);break;case f$1.HOSTNAME:this.isIPv6Open()?this.hostnameIPv6BracketDepth+=1:this.isIPv6Close()&&(this.hostnameIPv6BracketDepth-=1),this.isPortPrefix()&&!this.hostnameIPv6BracketDepth?this.changeState(f$1.PORT,1):this.isPathnameStart()?this.changeState(f$1.PATHNAME,0):this.isSearchPrefix()?this.changeState(f$1.SEARCH,1):this.isHashPrefix()&&this.changeState(f$1.HASH,1);break;case f$1.PORT:this.isPathnameStart()?this.changeState(f$1.PATHNAME,0):this.isSearchPrefix()?this.changeState(f$1.SEARCH,1):this.isHashPrefix()&&this.changeState(f$1.HASH,1);break;case f$1.PATHNAME:this.isSearchPrefix()?this.changeState(f$1.SEARCH,1):this.isHashPrefix()&&this.changeState(f$1.HASH,1);break;case f$1.SEARCH:this.isHashPrefix()&&this.changeState(f$1.HASH,1);}}},t.changeState=function(u,D){switch(this.state){case f$1.INIT:break;case f$1.PROTOCOL:this.internalResult.protocol=this.makeComponentString();break;case f$1.AUTHORITY:break;case f$1.USERNAME:this.internalResult.username=this.makeComponentString();break;case f$1.PASSWORD:this.internalResult.password=this.makeComponentString();break;case f$1.HOSTNAME:this.internalResult.hostname=this.makeComponentString();break;case f$1.PORT:this.internalResult.port=this.makeComponentString();break;case f$1.PATHNAME:this.internalResult.pathname=this.makeComponentString();break;case f$1.SEARCH:this.internalResult.search=this.makeComponentString();break;case f$1.HASH:this.internalResult.hash=this.makeComponentString();}this.changeStateWithoutSettingComponent(u,D);},t.changeStateWithoutSettingComponent=function(u,D){this.state=u,this.componentStart=this.tokenIndex+D,this.tokenIndex+=D,this.tokenIncrement=0;},t.rewind=function(){this.tokenIndex=this.componentStart,this.tokenIncrement=0;},t.rewindAndSetState=function(u){this.rewind(),this.state=u;},t.safeToken=function(u){return u<0&&(u=this.tokenList.length-u),u<this.tokenList.length?this.tokenList[u]:this.tokenList[this.tokenList.length-1]},t.isNonSpecialPatternChar=function(u,D){var t=this.safeToken(u);return t.value===D&&("CHAR"===t.type||"ESCAPED_CHAR"===t.type||"INVALID_CHAR"===t.type)},t.isProtocolSuffix=function(){return this.isNonSpecialPatternChar(this.tokenIndex,":")},t.nextIsAuthoritySlashes=function(){return this.isNonSpecialPatternChar(this.tokenIndex+1,"/")&&this.isNonSpecialPatternChar(this.tokenIndex+2,"/")},t.isIdentityTerminator=function(){return this.isNonSpecialPatternChar(this.tokenIndex,"@")},t.isPasswordPrefix=function(){return this.isNonSpecialPatternChar(this.tokenIndex,":")},t.isPortPrefix=function(){return this.isNonSpecialPatternChar(this.tokenIndex,":")},t.isPathnameStart=function(){return this.isNonSpecialPatternChar(this.tokenIndex,"/")},t.isSearchPrefix=function(){if(this.isNonSpecialPatternChar(this.tokenIndex,"?"))return !0;if("?"!==this.tokenList[this.tokenIndex].value)return !1;var u=this.safeToken(this.tokenIndex-1);return "NAME"!==u.type&&"PATTERN"!==u.type&&"CLOSE"!==u.type&&"ASTERISK"!==u.type},t.isHashPrefix=function(){return this.isNonSpecialPatternChar(this.tokenIndex,"#")},t.isGroupOpen=function(){return "OPEN"==this.tokenList[this.tokenIndex].type},t.isGroupClose=function(){return "CLOSE"==this.tokenList[this.tokenIndex].type},t.isIPv6Open=function(){return this.isNonSpecialPatternChar(this.tokenIndex,"[")},t.isIPv6Close=function(){return this.isNonSpecialPatternChar(this.tokenIndex,"]")},t.makeComponentString=function(){var u=this.tokenList[this.tokenIndex],D=this.safeToken(this.componentStart).index;return this.input.substring(D,u.index)},t.computeShouldTreatAsStandardURL=function(){var u={};Object.assign(u,B),u.encodePart=g;var D=a(this.makeComponentString(),void 0,u);this.shouldTreatAsStandardURL=m(D);},D(u,[{key:"result",get:function(){return 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u=(t=u).endsWith(":")?t.substr(0,t.length-":".length):t,D||""===u?u:g(u)}(D.protocol,t)),"string"==typeof D.username&&(u.username=function(u,D){if(D||""===u)return u;var t=new URL("https://example.com");return t.username=u,t.username}(D.username,t)),"string"==typeof D.password&&(u.password=function(u,D){if(D||""===u)return u;var t=new URL("https://example.com");return t.password=u,t.password}(D.password,t)),"string"==typeof D.hostname&&(u.hostname=function(u,D){return D||""===u?u:c(u)?y(u):v(u)}(D.hostname,t)),"string"==typeof D.port&&(u.port=function(u,D,t){return d(D)===u&&(u=""),t||""===u?u:R(u)}(D.port,u.protocol,t)),"string"==typeof D.pathname){if(u.pathname=D.pathname,F&&!function(u,D){return !(!u.length||"/"!==u[0]&&(!D||u.length<2||"\\"!=u[0]&&"{"!=u[0]||"/"!=u[1]))}(u.pathname,t)){var e=F.pathname.lastIndexOf("/");e>=0&&(u.pathname=F.pathname.substring(0,e+1)+u.pathname);}u.pathname=function(u,D,t){if(t||""===u)return u;if(D&&!l.includes(D))return new URL(D+":"+u).pathname;var 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0,this.regexp={},this.keys={},this.component_pattern={};try{if("string"==typeof u){var t=new b(u);if(t.parse(),u=t.result,D){if("string"!=typeof D)throw new TypeError("'baseURL' parameter is not of type 'string'.");u.baseURL=D;}else if("string"!=typeof u.protocol)throw new TypeError("A base URL must be provided for a relative constructor string.")}else if(D)throw new TypeError("parameter 1 is not of type 'string'.");if(!u||"object"!=typeof u)throw new TypeError("parameter 1 is not of type 'string' and cannot convert to dictionary.");var e;this.pattern=H({pathname:"*",protocol:"*",username:"*",password:"*",hostname:"*",port:"*",search:"*",hash:"*"},u,!0),d(this.pattern.protocol)===this.pattern.port&&(this.pattern.port="");for(var C,A=F$1(I);!(C=A()).done;)if((e=C.value)in this.pattern){var E={},r=this.pattern[e];switch(this.keys[e]=[],e){case"protocol":Object.assign(E,B),E.encodePart=g;break;case"username":Object.assign(E,B),E.encodePart=x;break;case"password":Object.assign(E,B),E.encodePart=S$1;break;case"hostname":Object.assign(E,o),E.encodePart=c(r)?y:v;break;case"port":Object.assign(E,B),E.encodePart=R;break;case"pathname":m(this.regexp.protocol)?(Object.assign(E,h),E.encodePart=k):(Object.assign(E,B),E.encodePart=w);break;case"search":Object.assign(E,B),E.encodePart=P;break;case"hash":Object.assign(E,B),E.encodePart=T;}try{var i=n(r,E);this.regexp[e]=s$1(i,this.keys[e],E),this.component_pattern[e]=L(i,E);}catch(u){throw new TypeError("invalid "+e+" pattern '"+this.pattern[e]+"'.")}}}catch(u){throw new TypeError("Failed to construct 'URLPattern': "+u.message)}}var t=u.prototype;return t.test=function(u,D){void 0===u&&(u={});var t,F={pathname:"",protocol:"",username:"",password:"",hostname:"",port:"",search:"",hash:""};if("string"!=typeof u&&D)throw new TypeError("parameter 1 is not of type 'string'.");if(void 0===u)return !1;try{F=H(F,"object"==typeof u?u:O(u,D),!1);}catch(u){return !1}for(t in this.pattern)if(!this.regexp[t].exec(F[t]))return !1;return !0},t.exec=function(u,D){void 0===u&&(u={});var t={pathname:"",protocol:"",username:"",password:"",hostname:"",port:"",search:"",hash:""};if("string"!=typeof u&&D)throw new TypeError("parameter 1 is not of type 'string'.");if(void 0!==u){try{t=H(t,"object"==typeof u?u:O(u,D),!1);}catch(u){return null}var e,C={};for(e in C.inputs=D?[u,D]:[u],this.pattern){var A=this.regexp[e].exec(t[e]);if(!A)return null;for(var E,n={},r=F$1(this.keys[e].entries());!(E=r()).done;){var i=E.value,s=i[1];"string"!=typeof s.name&&"number"!=typeof s.name||(n[s.name]=A[i[0]+1]||"");}C[e]={input:t[e]||"",groups:n};}return C}},D(u,[{key:"protocol",get:function(){return this.component_pattern.protocol}},{key:"username",get:function(){return this.component_pattern.username}},{key:"password",get:function(){return this.component_pattern.password}},{key:"hostname",get:function(){return this.component_pattern.hostname}},{key:"port",get:function(){return this.component_pattern.port}},{key:"pathname",get:function(){return this.component_pattern.pathname}},{key:"search",get:function(){return this.component_pattern.search}},{key:"hash",get:function(){return this.component_pattern.hash}}]),u}();

const INTERNAL = { tick: 0, pool: new Map };
function setTimeout(callback, delay = 0, ...args) {
    const func = __function_bind(callback, globalThis);
    const tick = ++INTERNAL.tick;
    const timeout = setTimeout$1(func, delay, ...args);
    INTERNAL.pool.set(tick, timeout);
    return tick;
}
function clearTimeout(timeoutId) {
    const timeout = INTERNAL.pool.get(timeoutId);
    if (timeout) {
        clearTimeout$1(timeout);
        INTERNAL.pool.delete(timeoutId);
    }
}

const PRIMITIVE  = 0;
const ARRAY      = 1;
const OBJECT     = 2;
const DATE       = 3;
const REGEXP     = 4;
const MAP        = 5;
const SET        = 6;
const ERROR      = 7;
const BIGINT     = 8;
// export const SYMBOL = 9;

const env = typeof self === 'object' ? self : globalThis;

const deserializer = ($, _) => {
  const as = (out, index) => {
    $.set(index, out);
    return out;
  };

  const unpair = index => {
    if ($.has(index))
      return $.get(index);

    const [type, value] = _[index];
    switch (type) {
      case PRIMITIVE:
        return as(value, index);
      case ARRAY: {
        const arr = as([], index);
        for (const index of value)
          arr.push(unpair(index));
        return arr;
      }
      case OBJECT: {
        const object = as({}, index);
        for (const [key, index] of value)
          object[unpair(key)] = unpair(index);
        return object;
      }
      case DATE:
        return as(new Date(value), index);
      case REGEXP: {
        const {source, flags} = value;
        return as(new RegExp(source, flags), index);
      }
      case MAP: {
        const map = as(new Map, index);
        for (const [key, index] of value)
          map.set(unpair(key), unpair(index));
        return map;
      }
      case SET: {
        const set = as(new Set, index);
        for (const index of value)
          set.add(unpair(index));
        return set;
      }
      case ERROR: {
        const {name, message} = value;
        return as(new env[name](message), index);
      }
      case BIGINT:
        return as(BigInt(value), index);
      case 'BigInt':
        return as(Object(BigInt(value)), index);
    }
    return as(new env[type](value), index);
  };

  return unpair;
};

/**
 * @typedef {Array<string,any>} Record a type representation
 */

/**
 * Returns a deserialized value from a serialized array of Records.
 * @param {Record[]} serialized a previously serialized value.
 * @returns {any}
 */
const deserialize = serialized => deserializer(new Map, serialized)(0);

const EMPTY = '';

const {toString} = {};
const {keys} = Object;

const typeOf = value => {
  const type = typeof value;
  if (type !== 'object' || !value)
    return [PRIMITIVE, type];

  const asString = toString.call(value).slice(8, -1);
  switch (asString) {
    case 'Array':
      return [ARRAY, EMPTY];
    case 'Object':
      return [OBJECT, EMPTY];
    case 'Date':
      return [DATE, EMPTY];
    case 'RegExp':
      return [REGEXP, EMPTY];
    case 'Map':
      return [MAP, EMPTY];
    case 'Set':
      return [SET, EMPTY];
  }

  if (asString.includes('Array'))
    return [ARRAY, asString];

  if (asString.includes('Error'))
    return [ERROR, asString];

  return [OBJECT, asString];
};

const shouldSkip = ([TYPE, type]) => (
  TYPE === PRIMITIVE &&
  (type === 'function' || type === 'symbol')
);

const serializer = (strict, json, $, _) => {

  const as = (out, value) => {
    const index = _.push(out) - 1;
    $.set(value, index);
    return index;
  };

  const pair = value => {
    if ($.has(value))
      return $.get(value);

    let [TYPE, type] = typeOf(value);
    switch (TYPE) {
      case PRIMITIVE: {
        let entry = value;
        switch (type) {
          case 'bigint':
            TYPE = BIGINT;
            entry = value.toString();
            break;
          case 'function':
          case 'symbol':
            if (strict)
              throw new TypeError('unable to serialize ' + type);
            entry = null;
            break;
        }
        return as([TYPE, entry], value);
      }
      case ARRAY: {
        if (type)
          return as([type, [...value]], value);
  
        const arr = [];
        const index = as([TYPE, arr], value);
        for (const entry of value)
          arr.push(pair(entry));
        return index;
      }
      case OBJECT: {
        if (type) {
          switch (type) {
            case 'BigInt':
              return as([type, value.toString()], value);
            case 'Boolean':
            case 'Number':
            case 'String':
              return as([type, value.valueOf()], value);
          }
        }

        if (json && ('toJSON' in value))
          return pair(value.toJSON());

        const entries = [];
        const index = as([TYPE, entries], value);
        for (const key of keys(value)) {
          if (strict || !shouldSkip(typeOf(value[key])))
            entries.push([pair(key), pair(value[key])]);
        }
        return index;
      }
      case DATE:
        return as([TYPE, value.toISOString()], value);
      case REGEXP: {
        const {source, flags} = value;
        return as([TYPE, {source, flags}], value);
      }
      case MAP: {
        const entries = [];
        const index = as([TYPE, entries], value);
        for (const [key, entry] of value) {
          if (strict || !(shouldSkip(typeOf(key)) || shouldSkip(typeOf(entry))))
            entries.push([pair(key), pair(entry)]);
        }
        return index;
      }
      case SET: {
        const entries = [];
        const index = as([TYPE, entries], value);
        for (const entry of value) {
          if (strict || !shouldSkip(typeOf(entry)))
            entries.push(pair(entry));
        }
        return index;
      }
    }

    const {message} = value;
    return as([TYPE, {name: type, message}], value);
  };

  return pair;
};

/**
 * @typedef {Array<string,any>} Record a type representation
 */

/**
 * Returns an array of serialized Records.
 * @param {any} value a serializable value.
 * @param {{lossy?: boolean}?} options an object with a `lossy` property that,
 *  if `true`, will not throw errors on incompatible types, and behave more
 *  like JSON stringify would behave. Symbol and Function will be discarded.
 * @returns {Record[]}
 */
 const serialize = (value, {json, lossy} = {}) => {
  const _ = [];
  return serializer(!(json || lossy), !!json, new Map, _)(value), _;
};

var structuredClone = (any, options) => deserialize(serialize(any, options));

class ImageData {
    constructor(arg0, arg1, ...args) {
        if (arguments.length < 2)
            throw new TypeError(`Failed to construct 'ImageData': 2 arguments required.`);
        /** Whether Uint8ClampedArray data is provided. */
        const hasData = __object_isPrototypeOf(Uint8ClampedArray.prototype, arg0);
        /** Image data, either provided or calculated. */
        const d = hasData ? arg0 : new Uint8ClampedArray(asNumber(arg0, 'width') * asNumber(arg1, 'height') * 4);
        /** Image width. */
        const w = asNumber(hasData ? arg1 : arg0, 'width');
        /** Image height. */
        const h = d.length / w / 4;
        /** Image color space. */
        const c = String(Object(hasData ? args[1] : args[0]).colorSpace || 'srgb');
        // throw if a provided height does not match the calculated height
        if (args.length && asNumber(args[0], 'height') !== h)
            throw new DOMException('height is not equal to (4 * width * height)', 'IndexSizeError');
        // throw if a provided colorspace does not match a known colorspace
        if (c !== 'srgb' && c !== 'rec2020' && c !== 'display-p3')
            throw new TypeError('colorSpace is not known value');
        Object.defineProperty(this, 'data', { configurable: true, enumerable: true, value: d });
        INTERNALS$3.set(this, { width: w, height: h, colorSpace: c });
    }
    get data() {
        internalsOf(this, 'ImageData', 'data');
        return Object.getOwnPropertyDescriptor(this, 'data').value;
    }
    get width() {
        return internalsOf(this, 'ImageData', 'width').width;
    }
    get height() {
        return internalsOf(this, 'ImageData', 'height').height;
    }
}
allowStringTag(ImageData);
/** Returns a coerced number, optionally throwing if the number is zero-ish. */
const asNumber = (value, axis) => {
    value = Number(value) || 0;
    if (value === 0)
        throw new TypeError(`The source ${axis} is zero or not a number.`);
    return value;
};

class CanvasRenderingContext2D {
    get canvas() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'canvas').canvas;
    }
    get direction() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'direction').direction;
    }
    get fillStyle() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'fillStyle').fillStyle;
    }
    get filter() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'filter').filter;
    }
    get globalAlpha() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'globalAlpha').globalAlpha;
    }
    get globalCompositeOperation() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'globalCompositeOperation').globalCompositeOperation;
    }
    get font() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'font').font;
    }
    get imageSmoothingEnabled() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'imageSmoothingEnabled').imageSmoothingEnabled;
    }
    get imageSmoothingQuality() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'imageSmoothingQuality').imageSmoothingQuality;
    }
    get lineCap() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'lineCap').lineCap;
    }
    get lineDashOffset() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'lineDashOffset').lineDashOffset;
    }
    get lineJoin() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'lineJoin').lineJoin;
    }
    get lineWidth() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'lineWidth').lineWidth;
    }
    get miterLimit() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'miterLimit').miterLimit;
    }
    get strokeStyle() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'strokeStyle').strokeStyle;
    }
    get shadowOffsetX() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'shadowOffsetX').shadowOffsetX;
    }
    get shadowOffsetY() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'shadowOffsetY').shadowOffsetY;
    }
    get shadowBlur() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'shadowBlur').shadowBlur;
    }
    get shadowColor() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'shadowColor').shadowColor;
    }
    get textAlign() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'textAlign').textAlign;
    }
    get textBaseline() {
        return internalsOf(this, 'CanvasRenderingContext2D', 'textBaseline').textBaseline;
    }
    arc() { }
    arcTo() { }
    beginPath() { }
    bezierCurveTo() { }
    clearRect() { }
    clip() { }
    closePath() { }
    createImageData(arg0, arg1) {
        /** Whether ImageData is provided. */
        const hasData = __object_isPrototypeOf(ImageData.prototype, arg0);
        const w = hasData ? arg0.width : arg0;
        const h = hasData ? arg0.height : arg1;
        const d = hasData ? arg0.data : new Uint8ClampedArray(w * h * 4);
        return new ImageData(d, w, h);
    }
    createLinearGradient() { }
    createPattern() { }
    createRadialGradient() { }
    drawFocusIfNeeded() { }
    drawImage() { }
    ellipse() { }
    fill() { }
    fillRect() { }
    fillText() { }
    getContextAttributes() { }
    getImageData() { }
    getLineDash() { }
    getTransform() { }
    isPointInPath() { }
    isPointInStroke() { }
    lineTo() { }
    measureText() { }
    moveTo() { }
    putImageData() { }
    quadraticCurveTo() { }
    rect() { }
    resetTransform() { }
    restore() { }
    rotate() { }
    save() { }
    scale() { }
    setLineDash() { }
    setTransform() { }
    stroke() { }
    strokeRect() { }
    strokeText() { }
    transform() { }
    translate() { }
}
allowStringTag(CanvasRenderingContext2D);
const __createCanvasRenderingContext2D = (canvas) => {
    const renderingContext2D = Object.create(CanvasRenderingContext2D.prototype);
    INTERNALS$3.set(renderingContext2D, {
        canvas,
        direction: 'inherit',
        fillStyle: '#000',
        filter: 'none',
        font: '10px sans-serif',
        globalAlpha: 0,
        globalCompositeOperation: 'source-over',
        imageSmoothingEnabled: false,
        imageSmoothingQuality: 'high',
        lineCap: 'butt',
        lineDashOffset: 0.0,
        lineJoin: 'miter',
        lineWidth: 1.0,
        miterLimit: 10.0,
        shadowBlur: 0,
        shadowColor: '#000',
        shadowOffsetX: 0,
        shadowOffsetY: 0,
        strokeStyle: '#000',
        textAlign: 'start',
        textBaseline: 'alphabetic',
    });
    return renderingContext2D;
};

class StyleSheet {
}
class CSSStyleSheet extends StyleSheet {
    async replace(text) {
        return new CSSStyleSheet();
    }
    replaceSync(text) {
        return new CSSStyleSheet();
    }
    get cssRules() {
        return [];
    }
}
allowStringTag(StyleSheet);
allowStringTag(CSSStyleSheet);

class CustomElementRegistry {
    /** Defines a new custom element using the given tag name and HTMLElement constructor. */
    define(name, constructor, options) {
        const internals = internalsOf(this, 'CustomElementRegistry', 'define');
        name = String(name);
        if (/[A-Z]/.test(name))
            throw new SyntaxError('Custom element name cannot contain an uppercase ASCII letter');
        if (!/^[a-z]/.test(name))
            throw new SyntaxError('Custom element name must have a lowercase ASCII letter as its first character');
        if (!/-/.test(name))
            throw new SyntaxError('Custom element name must contain a hyphen');
        internals.constructorByName.set(name, constructor);
        internals.nameByConstructor.set(constructor, name);
    }
    /** Returns the constructor associated with the given tag name. */
    get(name) {
        const internals = internalsOf(this, 'CustomElementRegistry', 'get');
        name = String(name).toLowerCase();
        return internals.constructorByName.get(name);
    }
    getName(constructor) {
        const internals = internalsOf(this, 'CustomElementRegistry', 'getName');
        return internals.nameByConstructor.get(constructor);
    }
}
allowStringTag(CustomElementRegistry);
const initCustomElementRegistry = (target, exclude) => {
    if (exclude.has('customElements'))
        return;
    const CustomElementRegistry = target.CustomElementRegistry || globalThis.CustomElementRegistry;
    const customElements = target.customElements = Object.create(CustomElementRegistry.prototype);
    INTERNALS$3.set(customElements, {
        constructorByName: new Map,
        nameByConstructor: new Map,
    });
};

class Element extends Node {
    hasAttribute(name) {
        return false;
    }
    getAttribute(name) {
        return null;
    }
    setAttribute(name, value) {
    }
    removeAttribute(name) {
    }
    attachShadow(init) {
        if (arguments.length < 1)
            throw new TypeError(`Failed to execute 'attachShadow' on 'Element': 1 argument required, but only 0 present.`);
        if (init !== Object(init))
            throw new TypeError(`Failed to execute 'attachShadow' on 'Element': The provided value is not of type 'ShadowRootInit'.`);
        if (init.mode !== 'open' && init.mode !== 'closed')
            throw new TypeError(`Failed to execute 'attachShadow' on 'Element': Failed to read the 'mode' property from 'ShadowRootInit': The provided value '${init.mode}' is not a valid enum value of type ShadowRootMode.`);
        const internals = internalsOf(this, 'Element', 'attachShadow');
        if (internals.shadowRoot)
            throw new Error('The operation is not supported.');
        internals.shadowInit = internals.shadowInit || {
            mode: init.mode,
            delegatesFocus: Boolean(init.delegatesFocus),
        };
        internals.shadowRoot = internals.shadowRoot || (/^open$/.test(internals.shadowInit.mode) ? Object.setPrototypeOf(new EventTarget(), ShadowRoot.prototype) : null);
        return internals.shadowRoot;
    }
    get assignedSlot() {
        return null;
    }
    get innerHTML() {
        internalsOf(this, 'Element', 'innerHTML');
        return '';
    }
    set innerHTML(value) {
        internalsOf(this, 'Element', 'innerHTML');
    }
    get shadowRoot() {
        const internals = internalsOf(this, 'Element', 'shadowRoot');
        return Object(internals.shadowInit).mode === 'open' ? internals.shadowRoot : null;
    }
    get localName() {
        return internalsOf(this, 'Element', 'localName').localName;
    }
    get nodeName() {
        return internalsOf(this, 'Element', 'nodeName').localName.toUpperCase();
    }
    get tagName() {
        return internalsOf(this, 'Element', 'tagName').localName.toUpperCase();
    }
}
class HTMLElement extends Element {
}
class HTMLBodyElement extends HTMLElement {
}
class HTMLDivElement extends HTMLElement {
}
class HTMLHeadElement extends HTMLElement {
}
class HTMLHtmlElement extends HTMLElement {
}
class HTMLSpanElement extends HTMLElement {
}
class HTMLStyleElement extends HTMLElement {
}
class HTMLTemplateElement extends HTMLElement {
}
class HTMLUnknownElement extends HTMLElement {
}
allowStringTag(Element);
allowStringTag(HTMLElement);
allowStringTag(HTMLBodyElement);
allowStringTag(HTMLDivElement);
allowStringTag(HTMLHeadElement);
allowStringTag(HTMLHtmlElement);
allowStringTag(HTMLSpanElement);
allowStringTag(HTMLStyleElement);
allowStringTag(HTMLTemplateElement);
allowStringTag(HTMLUnknownElement);

class Document extends Node {
    createElement(name) {
        const internals = internalsOf(this, 'Document', 'createElement');
        const customElementInternals = INTERNALS$3.get(internals.target.customElements);
        name = String(name).toLowerCase();
        const TypeOfHTMLElement = internals.constructorByName.get(name) || (customElementInternals && customElementInternals.constructorByName.get(name)) || HTMLUnknownElement;
        const element = Object.setPrototypeOf(new EventTarget(), TypeOfHTMLElement.prototype);
        INTERNALS$3.set(element, {
            attributes: {},
            localName: name,
            ownerDocument: this,
            shadowInit: null,
            shadowRoot: null,
        });
        return element;
    }
    createNodeIterator(root, whatToShow = NodeFilter.SHOW_ALL, filter) {
        const target = Object.create(NodeIterator.prototype);
        INTERNALS$3.set(target, { filter, pointerBeforeReferenceNode: false, referenceNode: root, root, whatToShow });
        return target;
    }
    createTextNode(data) {
        return new Text(data);
    }
    createTreeWalker(root, whatToShow = NodeFilter.SHOW_ALL, filter, expandEntityReferences) {
        const target = Object.create(TreeWalker.prototype);
        INTERNALS$3.set(target, { filter, currentNode: root, root, whatToShow });
        return target;
    }
    get adoptedStyleSheets() {
        return [];
    }
    get styleSheets() {
        return [];
    }
}
class HTMLDocument extends Document {
}
allowStringTag(Document);
allowStringTag(HTMLDocument);
const initDocument = (target, exclude) => {
    if (exclude.has('document'))
        return;
    const EventTarget = target.EventTarget || globalThis.EventTarget;
    const HTMLDocument = target.HTMLDocument || globalThis.HTMLDocument;
    const document = target.document = Object.setPrototypeOf(new EventTarget(), HTMLDocument.prototype);
    INTERNALS$3.set(document, {
        target,
        constructorByName: new Map([
            ['body', target.HTMLBodyElement],
            ['canvas', target.HTMLCanvasElement],
            ['div', target.HTMLDivElement],
            ['head', target.HTMLHeadElement],
            ['html', target.HTMLHtmlElement],
            ['img', target.HTMLImageElement],
            ['span', target.HTMLSpanElement],
            ['style', target.HTMLStyleElement],
        ]),
        nameByConstructor: new Map,
    });
    const initElement = (name, Class) => {
        const target = Object.setPrototypeOf(new EventTarget(), Class.prototype);
        INTERNALS$3.set(target, {
            attributes: {},
            localName: name,
            ownerDocument: document,
            shadowRoot: null,
            shadowInit: null,
        });
        return target;
    };
    document.body = initElement('body', target.HTMLBodyElement);
    document.head = initElement('head', target.HTMLHeadElement);
    document.documentElement = initElement('html', target.HTMLHtmlElement);
};

class HTMLCanvasElement extends HTMLElement {
    get height() {
        return internalsOf(this, 'HTMLCanvasElement', 'height').height;
    }
    set height(value) {
        internalsOf(this, 'HTMLCanvasElement', 'height').height = Number(value) || 0;
    }
    get width() {
        return internalsOf(this, 'HTMLCanvasElement', 'width').width;
    }
    set width(value) {
        internalsOf(this, 'HTMLCanvasElement', 'width').width = Number(value) || 0;
    }
    captureStream() {
        return null;
    }
    getContext(contextType) {
        const internals = internalsOf(this, 'HTMLCanvasElement', 'getContext');
        switch (contextType) {
            case '2d':
                if (internals.renderingContext2D)
                    return internals.renderingContext2D;
                internals.renderingContext2D = __createCanvasRenderingContext2D(this);
                return internals.renderingContext2D;
            default:
                return null;
        }
    }
    toBlob() { }
    toDataURL() { }
    transferControlToOffscreen() { }
}
allowStringTag(HTMLCanvasElement);

class HTMLImageElement extends HTMLElement {
    get src() {
        return internalsOf(this, 'HTMLImageElement', 'src').src;
    }
    set src(value) {
        const internals = internalsOf(this, 'HTMLImageElement', 'src');
        internals.src = String(value);
    }
}
allowStringTag(HTMLImageElement);

function Image() {
    // @ts-ignore
    INTERNALS$3.set(this, {
        attributes: {},
        localName: 'img',
        innerHTML: '',
        shadowRoot: null,
        shadowInit: null,
    });
}
Image.prototype = HTMLImageElement.prototype;

class IntersectionObserver {
    disconnect() { }
    observe() { }
    takeRecords() {
        return [];
    }
    unobserve() { }
}
class MutationObserver {
    disconnect() { }
    observe() { }
    takeRecords() {
        return [];
    }
    unobserve() { }
}
class ResizeObserver {
    disconnect() { }
    observe() { }
    takeRecords() {
        return [];
    }
    unobserve() { }
}
allowStringTag(MutationObserver);
allowStringTag(IntersectionObserver);
allowStringTag(ResizeObserver);

class MediaQueryList extends EventTarget {
    get matches() {
        return internalsOf(this, 'MediaQueryList', 'matches').matches;
    }
    get media() {
        return internalsOf(this, 'MediaQueryList', 'media').media;
    }
}
allowStringTag(MediaQueryList);
const initMediaQueryList = (target, exclude) => {
    if (exclude.has('MediaQueryList') || exclude.has('matchMedia'))
        return;
    const EventTarget = target.EventTarget || globalThis.EventTarget;
    const MediaQueryList = target.MediaQueryList || globalThis.MediaQueryList;
    target.matchMedia = function matchMedia(media) {
        const mql = Object.setPrototypeOf(new EventTarget(), MediaQueryList.prototype);
        INTERNALS$3.set(mql, {
            matches: false,
            media,
        });
        return mql;
    };
};

class OffscreenCanvas extends EventTarget {
    constructor(width, height) {
        super();
        if (arguments.length < 2)
            throw new TypeError(`Failed to construct 'OffscreenCanvas': 2 arguments required.`);
        width = Number(width) || 0;
        height = Number(height) || 0;
        INTERNALS$3.set(this, { width, height });
    }
    get height() {
        return internalsOf(this, 'OffscreenCanvas', 'height').height;
    }
    set height(value) {
        internalsOf(this, 'OffscreenCanvas', 'height').height = Number(value) || 0;
    }
    get width() {
        return internalsOf(this, 'OffscreenCanvas', 'width').width;
    }
    set width(value) {
        internalsOf(this, 'OffscreenCanvas', 'width').width = Number(value) || 0;
    }
    getContext(contextType) {
        const internals = internalsOf(this, 'HTMLCanvasElement', 'getContext');
        switch (contextType) {
            case '2d':
                if (internals.renderingContext2D)
                    return internals.renderingContext2D;
                internals.renderingContext2D = __createCanvasRenderingContext2D(this);
                return internals.renderingContext2D;
            default:
                return null;
        }
    }
    convertToBlob(options) {
        options = Object(options);
        Number(options.quality) || 0;
        const type = getImageType(String(options.type).trim().toLowerCase());
        return Promise.resolve(new Blob([], { type }));
    }
}
allowStringTag(OffscreenCanvas);
const getImageType = (type) => type === 'image/avif' || type === 'image/jpeg' || type === 'image/png' || type === 'image/webp' ? type : 'image/png';

class Storage {
    clear() {
        internalsOf(this, 'Storage', 'clear').storage.clear();
    }
    getItem(key) {
        return getStringOrNull(internalsOf(this, 'Storage', 'getItem').storage.get(String(key)));
    }
    key(index) {
        return getStringOrNull([...internalsOf(this, 'Storage', 'key').storage.keys()][Number(index) || 0]);
    }
    removeItem(key) {
        internalsOf(this, 'Storage', 'getItem').storage.delete(String(key));
    }
    setItem(key, value) {
        internalsOf(this, 'Storage', 'getItem').storage.set(String(key), String(value));
    }
    get length() {
        return internalsOf(this, 'Storage', 'size').storage.size;
    }
}
const getStringOrNull = (value) => typeof value === 'string' ? value : null;
const initStorage = (target, exclude) => {
    if (exclude.has('Storage') || exclude.has('localStorage'))
        return;
    target.localStorage = Object.create(Storage.prototype);
    const storageInternals = new Map();
    INTERNALS$3.set(target.localStorage, {
        storage: storageInternals
    });
};

class Window extends EventTarget {
    get self() {
        return this;
    }
    get top() {
        return this;
    }
    get window() {
        return this;
    }
    get innerHeight() {
        return 0;
    }
    get innerWidth() {
        return 0;
    }
    get scrollX() {
        return 0;
    }
    get scrollY() {
        return 0;
    }
}
allowStringTag(Window);
const initWindow = (target, exclude) => {
    if (exclude.has('Window') || exclude.has('window'))
        return;
    target.window = target;
};

function alert(...messages) {
    console.log(...messages);
}

const hasOwn = {
    hasOwn(instance, property) {
        return __object_hasOwnProperty(instance, property);
    }
}.hasOwn;
const initObject = (target, exclude) => {
    if (exclude.has('Object') || exclude.has('object') || exclude.has('hasOwn'))
        return;
    const Class = target.Object || globalThis.Object;
    Object.defineProperty(Class, 'hasOwn', {
        value: hasOwn,
        writable: true,
        enumerable: false,
        configurable: true
    });
};

const any = {
    async any(iterable) {
        return Promise.all([...iterable].map(promise => {
            return new Promise((resolve, reject) => Promise.resolve(promise).then(reject, resolve));
        })).then(errors => Promise.reject(errors), value => Promise.resolve(value));
    }
}.any;
const initPromise = (target, exclude) => {
    if (exclude.has('Promise') || exclude.has('any'))
        return;
    const Class = target.Promise || globalThis.Promise;
    if (!Class.any)
        Object.defineProperty(Class, 'any', {
            value: any,
            writable: true,
            enumerable: false,
            configurable: true
        });
};

const at = {
    at(index) {
        index = Math.trunc(index) || 0;
        if (index < 0)
            index += this.length;
        if (index < 0 || index >= this.length)
            return undefined;
        return this[index];
    }
}.at;
const initRelativeIndexingMethod = (target, exclude) => {
    if (exclude.has('at'))
        return;
    const Classes = [];
    if (!exclude.has('TypedArray'))
        Classes.push(Object.getPrototypeOf(target.Int8Array || globalThis.Int8Array));
    if (!exclude.has('Array'))
        Classes.push(target.Array || globalThis.Array);
    if (!exclude.has('String'))
        Classes.push(target.String || globalThis.String);
    for (const Class of Classes) {
        if (!Class.prototype.at)
            Object.defineProperty(Class.prototype, 'at', {
                value: at,
                writable: true,
                enumerable: false,
                configurable: true
            });
    }
};

const replaceAll = {
    replaceAll(searchValue, replaceValue) {
        return __object_isPrototypeOf(RegExp.prototype, searchValue)
            ? this.replace(searchValue, replaceValue)
            : this.replace(new RegExp(__string_escapeRegExp(searchValue), 'g'), replaceValue);
    }
}.replaceAll;
const initString = (target, exclude) => {
    if (exclude.has('String') || exclude.has('replaceAll'))
        return;
    const Class = target.String || globalThis.String;
    if (!Class.prototype.replaceAll)
        Object.defineProperty(Class.prototype, 'replaceAll', {
            value: replaceAll,
            writable: true,
            enumerable: false,
            configurable: true
        });
};

const exclusionsForHTMLElement = ['CustomElementsRegistry', 'HTMLElement', 'HTMLBodyElement', 'HTMLCanvasElement', 'HTMLDivElement', 'HTMLHeadElement', 'HTMLHtmlElement', 'HTMLImageElement', 'HTMLStyleElement', 'HTMLTemplateElement', 'HTMLUnknownElement', 'Image'];
const exclusionsForElement = ['Element', ...exclusionsForHTMLElement];
const exclusionsForDocument = ['CustomElementsRegistry', 'Document', 'HTMLDocument', 'document', 'customElements'];
const exclusionsForNode = ['Node', 'DocumentFragment', 'ShadowRoot', ...exclusionsForDocument, ...exclusionsForElement];
const exclusionsForEventTarget = ['AbortSignal', 'Event', 'CustomEvent', 'EventTarget', 'OffscreenCanvas', 'MediaQueryList', 'Window', ...exclusionsForNode];
const exclusionsForEvent = ['AbortSignal', 'Event', 'CustomEvent', 'EventTarget', 'MediaQueryList', 'OffscreenCanvas', 'Window', ...exclusionsForNode];
const exclusions = {
    'Blob+': ['Blob', 'File'],
    'Document+': exclusionsForDocument,
    'Element+': exclusionsForElement,
    'Event+': exclusionsForEvent,
    'EventTarget+': exclusionsForEventTarget,
    'HTMLElement+': exclusionsForHTMLElement,
    'Node+': exclusionsForNode,
    'StyleSheet+': ['StyleSheet', 'CSSStyleSheet'],
};

const inheritence = {
    CSSStyleSheet: 'StyleSheet',
    CustomEvent: 'Event',
    DOMException: 'Error',
    Document: 'Node',
    DocumentFragment: 'Node',
    Element: 'Node',
    File: 'Blob',
    HTMLDocument: 'Document',
    HTMLElement: 'Element',
    HTMLBodyElement: 'HTMLElement',
    HTMLCanvasElement: 'HTMLElement',
    HTMLDivElement: 'HTMLElement',
    HTMLHeadElement: 'HTMLElement',
    HTMLHtmlElement: 'HTMLElement',
    HTMLImageElement: 'HTMLElement',
    HTMLSpanElement: 'HTMLElement',
    HTMLStyleElement: 'HTMLElement',
    HTMLTemplateElement: 'HTMLElement',
    HTMLUnknownElement: 'HTMLElement',
    Image: 'HTMLElement',
    MediaQueryList: 'EventTarget',
    Node: 'EventTarget',
    OffscreenCanvas: 'EventTarget',
    ShadowRoot: 'DocumentFragment',
    Window: 'EventTarget',
};

const polyfill = (target, options) => {
    const webAPIs = {
        AbortController,
        AbortSignal,
        Blob,
        ByteLengthQueuingStrategy,
        CanvasRenderingContext2D,
        CharacterData,
        Comment,
        CountQueuingStrategy,
        CSSStyleSheet,
        CustomElementRegistry,
        CustomEvent,
        Document,
        DocumentFragment,
        DOMException,
        Element,
        Event,
        EventTarget,
        File,
        FormData,
        HTMLDocument,
        HTMLElement,
        HTMLBodyElement,
        HTMLCanvasElement,
        HTMLDivElement,
        HTMLHeadElement,
        HTMLHtmlElement,
        HTMLImageElement,
        HTMLSpanElement,
        HTMLStyleElement,
        HTMLTemplateElement,
        HTMLUnknownElement,
        Headers,
        IntersectionObserver,
        Image,
        ImageData,
        MediaQueryList,
        MutationObserver,
        Node,
        NodeFilter: NodeFilter$1,
        NodeIterator: NodeIterator$1,
        OffscreenCanvas,
        ReadableByteStreamController,
        ReadableStream,
        ReadableStreamBYOBReader,
        ReadableStreamBYOBRequest,
        ReadableStreamDefaultController,
        ReadableStreamDefaultReader,
        Request,
        ResizeObserver,
        Response,
        ShadowRoot,
        Storage,
        StyleSheet,
        Text,
        TransformStream,
        TreeWalker,
        URLPattern: U,
        WritableStream,
        WritableStreamDefaultController,
        WritableStreamDefaultWriter,
        Window,
        alert,
        atob,
        btoa,
        cancelAnimationFrame,
        cancelIdleCallback,
        clearTimeout,
        fetch,
        requestAnimationFrame,
        requestIdleCallback,
        setTimeout,
        structuredClone,
    };
    // initialize exclude options
    const excludeOptions = new Set(typeof Object(options).exclude === 'string'
        ? String(Object(options).exclude).trim().split(/\s+/)
        : Array.isArray(Object(options).exclude)
            ? Object(options).exclude.reduce((array, entry) => array.splice(array.length, 0, ...(typeof entry === 'string' ? entry.trim().split(/\s+/) : [])) && array, [])
            : []);
    // expand exclude options using exclusion shorthands
    for (const excludeOption of excludeOptions) {
        if (excludeOption in exclusions) {
            for (const exclusion of exclusions[excludeOption]) {
                excludeOptions.add(exclusion);
            }
        }
    }
    // apply each WebAPI
    for (const name of Object.keys(webAPIs)) {
        // skip WebAPIs that are excluded
        if (excludeOptions.has(name))
            continue;
        // skip WebAPIs that are built-in 
        if (Object.hasOwnProperty.call(target, name))
            continue;
        // define WebAPIs on the target
        Object.defineProperty(target, name, { configurable: true, enumerable: true, writable: true, value: webAPIs[name] });
    }
    // ensure WebAPIs correctly inherit other WebAPIs
    for (const name of Object.keys(webAPIs)) {
        // skip WebAPIs that are excluded
        if (excludeOptions.has(name))
            continue;
        // skip WebAPIs that do not extend other WebAPIs
        if (!Object.hasOwnProperty.call(inheritence, name))
            continue;
        const Class = target[name];
        const Super = target[inheritence[name]];
        // skip WebAPIs that are not available
        if (!Class || !Super)
            continue;
        // skip WebAPIs that are already inherited correctly 
        if (Object.getPrototypeOf(Class.prototype) === Super.prototype)
            continue;
        // define WebAPIs inheritence
        Object.setPrototypeOf(Class.prototype, Super.prototype);
    }
    if (!excludeOptions.has('HTMLDocument') && !excludeOptions.has('HTMLElement')) {
        initDocument(target, excludeOptions);
        if (!excludeOptions.has('CustomElementRegistry')) {
            initCustomElementRegistry(target, excludeOptions);
        }
    }
    initObject(target, excludeOptions);
    initMediaQueryList(target, excludeOptions);
    initPromise(target, excludeOptions);
    initRelativeIndexingMethod(target, excludeOptions);
    initStorage(target, excludeOptions);
    initString(target, excludeOptions);
    initWindow(target, excludeOptions);
    return target;
};
polyfill.internals = (target, name) => {
    const init = {
        CustomElementRegistry: initCustomElementRegistry,
        Document: initDocument,
        MediaQueryList: initMediaQueryList,
        Object: initObject,
        Promise: initPromise,
        RelativeIndexingMethod: initRelativeIndexingMethod,
        Storage: initStorage,
        String: initString,
        Window: initWindow,
    };
    init[name](target, new Set());
    return target;
};

let s = 0;
const S = {
	START_BOUNDARY: s++,
	HEADER_FIELD_START: s++,
	HEADER_FIELD: s++,
	HEADER_VALUE_START: s++,
	HEADER_VALUE: s++,
	HEADER_VALUE_ALMOST_DONE: s++,
	HEADERS_ALMOST_DONE: s++,
	PART_DATA_START: s++,
	PART_DATA: s++,
	END: s++
};

let f = 1;
const F = {
	PART_BOUNDARY: f,
	LAST_BOUNDARY: f *= 2
};

const LF = 10;
const CR = 13;
const SPACE = 32;
const HYPHEN = 45;
const COLON = 58;
const A = 97;
const Z = 122;

const lower = c => c | 0x20;

const noop = () => {};

class MultipartParser {
	/**
	 * @param {string} boundary
	 */
	constructor(boundary) {
		this.index = 0;
		this.flags = 0;

		this.onHeaderEnd = noop;
		this.onHeaderField = noop;
		this.onHeadersEnd = noop;
		this.onHeaderValue = noop;
		this.onPartBegin = noop;
		this.onPartData = noop;
		this.onPartEnd = noop;

		this.boundaryChars = {};

		boundary = '\r\n--' + boundary;
		const ui8a = new Uint8Array(boundary.length);
		for (let i = 0; i < boundary.length; i++) {
			ui8a[i] = boundary.charCodeAt(i);
			this.boundaryChars[ui8a[i]] = true;
		}

		this.boundary = ui8a;
		this.lookbehind = new Uint8Array(this.boundary.length + 8);
		this.state = S.START_BOUNDARY;
	}

	/**
	 * @param {Uint8Array} data
	 */
	write(data) {
		let i = 0;
		const length_ = data.length;
		let previousIndex = this.index;
		let {lookbehind, boundary, boundaryChars, index, state, flags} = this;
		const boundaryLength = this.boundary.length;
		const boundaryEnd = boundaryLength - 1;
		const bufferLength = data.length;
		let c;
		let cl;

		const mark = name => {
			this[name + 'Mark'] = i;
		};

		const clear = name => {
			delete this[name + 'Mark'];
		};

		const callback = (callbackSymbol, start, end, ui8a) => {
			if (start === undefined || start !== end) {
				this[callbackSymbol](ui8a && ui8a.subarray(start, end));
			}
		};

		const dataCallback = (name, clear) => {
			const markSymbol = name + 'Mark';
			if (!(markSymbol in this)) {
				return;
			}

			if (clear) {
				callback(name, this[markSymbol], i, data);
				delete this[markSymbol];
			} else {
				callback(name, this[markSymbol], data.length, data);
				this[markSymbol] = 0;
			}
		};

		for (i = 0; i < length_; i++) {
			c = data[i];

			switch (state) {
				case S.START_BOUNDARY:
					if (index === boundary.length - 2) {
						if (c === HYPHEN) {
							flags |= F.LAST_BOUNDARY;
						} else if (c !== CR) {
							return;
						}

						index++;
						break;
					} else if (index - 1 === boundary.length - 2) {
						if (flags & F.LAST_BOUNDARY && c === HYPHEN) {
							state = S.END;
							flags = 0;
						} else if (!(flags & F.LAST_BOUNDARY) && c === LF) {
							index = 0;
							callback('onPartBegin');
							state = S.HEADER_FIELD_START;
						} else {
							return;
						}

						break;
					}

					if (c !== boundary[index + 2]) {
						index = -2;
					}

					if (c === boundary[index + 2]) {
						index++;
					}

					break;
				case S.HEADER_FIELD_START:
					state = S.HEADER_FIELD;
					mark('onHeaderField');
					index = 0;
					// falls through
				case S.HEADER_FIELD:
					if (c === CR) {
						clear('onHeaderField');
						state = S.HEADERS_ALMOST_DONE;
						break;
					}

					index++;
					if (c === HYPHEN) {
						break;
					}

					if (c === COLON) {
						if (index === 1) {
							// empty header field
							return;
						}

						dataCallback('onHeaderField', true);
						state = S.HEADER_VALUE_START;
						break;
					}

					cl = lower(c);
					if (cl < A || cl > Z) {
						return;
					}

					break;
				case S.HEADER_VALUE_START:
					if (c === SPACE) {
						break;
					}

					mark('onHeaderValue');
					state = S.HEADER_VALUE;
					// falls through
				case S.HEADER_VALUE:
					if (c === CR) {
						dataCallback('onHeaderValue', true);
						callback('onHeaderEnd');
						state = S.HEADER_VALUE_ALMOST_DONE;
					}

					break;
				case S.HEADER_VALUE_ALMOST_DONE:
					if (c !== LF) {
						return;
					}

					state = S.HEADER_FIELD_START;
					break;
				case S.HEADERS_ALMOST_DONE:
					if (c !== LF) {
						return;
					}

					callback('onHeadersEnd');
					state = S.PART_DATA_START;
					break;
				case S.PART_DATA_START:
					state = S.PART_DATA;
					mark('onPartData');
					// falls through
				case S.PART_DATA:
					previousIndex = index;

					if (index === 0) {
						// boyer-moore derrived algorithm to safely skip non-boundary data
						i += boundaryEnd;
						while (i < bufferLength && !(data[i] in boundaryChars)) {
							i += boundaryLength;
						}

						i -= boundaryEnd;
						c = data[i];
					}

					if (index < boundary.length) {
						if (boundary[index] === c) {
							if (index === 0) {
								dataCallback('onPartData', true);
							}

							index++;
						} else {
							index = 0;
						}
					} else if (index === boundary.length) {
						index++;
						if (c === CR) {
							// CR = part boundary
							flags |= F.PART_BOUNDARY;
						} else if (c === HYPHEN) {
							// HYPHEN = end boundary
							flags |= F.LAST_BOUNDARY;
						} else {
							index = 0;
						}
					} else if (index - 1 === boundary.length) {
						if (flags & F.PART_BOUNDARY) {
							index = 0;
							if (c === LF) {
								// unset the PART_BOUNDARY flag
								flags &= ~F.PART_BOUNDARY;
								callback('onPartEnd');
								callback('onPartBegin');
								state = S.HEADER_FIELD_START;
								break;
							}
						} else if (flags & F.LAST_BOUNDARY) {
							if (c === HYPHEN) {
								callback('onPartEnd');
								state = S.END;
								flags = 0;
							} else {
								index = 0;
							}
						} else {
							index = 0;
						}
					}

					if (index > 0) {
						// when matching a possible boundary, keep a lookbehind reference
						// in case it turns out to be a false lead
						lookbehind[index - 1] = c;
					} else if (previousIndex > 0) {
						// if our boundary turned out to be rubbish, the captured lookbehind
						// belongs to partData
						const _lookbehind = new Uint8Array(lookbehind.buffer, lookbehind.byteOffset, lookbehind.byteLength);
						callback('onPartData', 0, previousIndex, _lookbehind);
						previousIndex = 0;
						mark('onPartData');

						// reconsider the current character even so it interrupted the sequence
						// it could be the beginning of a new sequence
						i--;
					}

					break;
				case S.END:
					break;
				default:
					throw new Error(`Unexpected state entered: ${state}`);
			}
		}

		dataCallback('onHeaderField');
		dataCallback('onHeaderValue');
		dataCallback('onPartData');

		// Update properties for the next call
		this.index = index;
		this.state = state;
		this.flags = flags;
	}

	end() {
		if ((this.state === S.HEADER_FIELD_START && this.index === 0) ||
			(this.state === S.PART_DATA && this.index === this.boundary.length)) {
			this.onPartEnd();
		} else if (this.state !== S.END) {
			throw new Error('MultipartParser.end(): stream ended unexpectedly');
		}
	}
}

function _fileName(headerValue) {
	// matches either a quoted-string or a token (RFC 2616 section 19.5.1)
	const m = headerValue.match(/\bfilename=("(.*?)"|([^()<>@,;:\\"/[\]?={}\s\t]+))($|;\s)/i);
	if (!m) {
		return;
	}

	const match = m[2] || m[3] || '';
	let filename = match.slice(match.lastIndexOf('\\') + 1);
	filename = filename.replace(/%22/g, '"');
	filename = filename.replace(/&#(\d{4});/g, (m, code) => {
		return String.fromCharCode(code);
	});
	return filename;
}

async function toFormData(Body, ct) {
	if (!/multipart/i.test(ct)) {
		throw new TypeError('Failed to fetch');
	}

	const m = ct.match(/boundary=(?:"([^"]+)"|([^;]+))/i);

	if (!m) {
		throw new TypeError('no or bad content-type header, no multipart boundary');
	}

	const parser = new MultipartParser(m[1] || m[2]);

	let headerField;
	let headerValue;
	let entryValue;
	let entryName;
	let contentType;
	let filename;
	const entryChunks = [];
	const formData = new FormData();

	const onPartData = ui8a => {
		entryValue += decoder.decode(ui8a, {stream: true});
	};

	const appendToFile = ui8a => {
		entryChunks.push(ui8a);
	};

	const appendFileToFormData = () => {
		const file = new File(entryChunks, filename, {type: contentType});
		formData.append(entryName, file);
	};

	const appendEntryToFormData = () => {
		formData.append(entryName, entryValue);
	};

	const decoder = new TextDecoder('utf-8');
	decoder.decode();

	parser.onPartBegin = function () {
		parser.onPartData = onPartData;
		parser.onPartEnd = appendEntryToFormData;

		headerField = '';
		headerValue = '';
		entryValue = '';
		entryName = '';
		contentType = '';
		filename = null;
		entryChunks.length = 0;
	};

	parser.onHeaderField = function (ui8a) {
		headerField += decoder.decode(ui8a, {stream: true});
	};

	parser.onHeaderValue = function (ui8a) {
		headerValue += decoder.decode(ui8a, {stream: true});
	};

	parser.onHeaderEnd = function () {
		headerValue += decoder.decode();
		headerField = headerField.toLowerCase();

		if (headerField === 'content-disposition') {
			// matches either a quoted-string or a token (RFC 2616 section 19.5.1)
			const m = headerValue.match(/\bname=("([^"]*)"|([^()<>@,;:\\"/[\]?={}\s\t]+))/i);

			if (m) {
				entryName = m[2] || m[3] || '';
			}

			filename = _fileName(headerValue);

			if (filename) {
				parser.onPartData = appendToFile;
				parser.onPartEnd = appendFileToFormData;
			}
		} else if (headerField === 'content-type') {
			contentType = headerValue;
		}

		headerValue = '';
		headerField = '';
	};

	for await (const chunk of Body) {
		parser.write(chunk);
	}

	parser.end();

	return formData;
}

var multipartParser = /*#__PURE__*/Object.freeze({
    __proto__: null,
    toFormData: toFormData
});

export { AbortController, AbortSignal, Blob, ByteLengthQueuingStrategy, CSSStyleSheet, CanvasRenderingContext2D, CharacterData, Comment, CountQueuingStrategy, CustomElementRegistry, CustomEvent, DOMException, Document, DocumentFragment, Element, Event, EventTarget, File, FormData, HTMLBodyElement, HTMLCanvasElement, HTMLDivElement, HTMLDocument, HTMLElement, HTMLHeadElement, HTMLHtmlElement, HTMLImageElement, HTMLSpanElement, HTMLStyleElement, HTMLTemplateElement, HTMLUnknownElement, Headers, Image, ImageData, IntersectionObserver, MediaQueryList, MutationObserver, Node, NodeFilter$1 as NodeFilter, NodeIterator$1 as NodeIterator, OffscreenCanvas, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, Request, ResizeObserver, Response, ShadowRoot, StyleSheet, Text, TransformStream, TreeWalker, U as URLPattern, Window, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter, alert, atob, btoa, cancelAnimationFrame, cancelIdleCallback, clearTimeout, fetch, pathToPosix, polyfill, requestAnimationFrame, requestIdleCallback, setTimeout, structuredClone };
//# sourceMappingURL=mod.js.map