Sync from a44cfb874a

.codesandbox/Dockerfile

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+FROM node:18-bullseye

.gitignore

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+# build output
+dist/
+# generated types
+.astro/
+
+# dependencies
+node_modules/
+
+# logs
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+
+# environment variables
+.env
+.env.production
+
+# macOS-specific files
+.DS_Store
+
+# jetbrains setting folder
+.idea/

.vscode/extensions.json

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+{
+  "recommendations": ["astro-build.astro-vscode", "unifiedjs.vscode-mdx"],
+  "unwantedRecommendations": []
+}

.vscode/launch.json

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+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "command": "./node_modules/.bin/astro dev",
+      "name": "Development server",
+      "request": "launch",
+      "type": "node-terminal"
+    }
+  ]
+}

README.md

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+# Astro Example: MDX
+
+```sh
+npm create astro@latest -- --template with-mdx
+```
+
+[![Open in StackBlitz](https://developer.stackblitz.com/img/open_in_stackblitz.svg)](https://stackblitz.com/github/withastro/astro/tree/latest/examples/with-mdx)
+[![Open with CodeSandbox](https://assets.codesandbox.io/github/button-edit-lime.svg)](https://codesandbox.io/p/sandbox/github/withastro/astro/tree/latest/examples/with-mdx)
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/withastro/astro?devcontainer_path=.devcontainer/with-mdx/devcontainer.json)
+
+This example showcases using [`@astrojs/mdx`](https://www.npmjs.com/package/@astrojs/mdx) to author content using [MDX](https://mdxjs.com/).

astro.config.mjs

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+// @ts-check
+import { defineConfig } from 'astro/config';
+import mdx from '@astrojs/mdx';
+import preact from '@astrojs/preact';
+
+// https://astro.build/config
+export default defineConfig({
+	integrations: [mdx(), preact()],
+});

package.json

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+{
+  "name": "@example/with-mdx",
+  "type": "module",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "dev": "astro dev",
+    "build": "astro build",
+    "preview": "astro preview",
+    "astro": "astro"
+  },
+  "dependencies": {
+    "@astrojs/mdx": "^4.0.2",
+    "@astrojs/preact": "^4.0.0",
+    "astro": "^5.0.8",
+    "preact": "^10.24.3"
+  }
+}

public/favicon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 128 128">
+    <path d="M50.4 78.5a75.1 75.1 0 0 0-28.5 6.9l24.2-65.7c.7-2 1.9-3.2 3.4-3.2h29c1.5 0 2.7 1.2 3.4 3.2l24.2 65.7s-11.6-7-28.5-7L67 45.5c-.4-1.7-1.6-2.8-2.9-2.8-1.3 0-2.5 1.1-2.9 2.7L50.4 78.5Zm-1.1 28.2Zm-4.2-20.2c-2 6.6-.6 15.8 4.2 20.2a17.5 17.5 0 0 1 .2-.7 5.5 5.5 0 0 1 5.7-4.5c2.8.1 4.3 1.5 4.7 4.7.2 1.1.2 2.3.2 3.5v.4c0 2.7.7 5.2 2.2 7.4a13 13 0 0 0 5.7 4.9v-.3l-.2-.3c-1.8-5.6-.5-9.5 4.4-12.8l1.5-1a73 73 0 0 0 3.2-2.2 16 16 0 0 0 6.8-11.4c.3-2 .1-4-.6-6l-.8.6-1.6 1a37 37 0 0 1-22.4 2.7c-5-.7-9.7-2-13.2-6.2Z" />
+    <style>
+        path { fill: #000; }
+        @media (prefers-color-scheme: dark) {
+            path { fill: #FFF; }
+        }
+    </style>
+</svg>

src/components/Counter.jsx

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+import { useState } from 'preact/hooks';
+
+export default function Counter({ children }) {
+	const [count, setCount] = useState(0);
+	const add = () => setCount((i) => i + 1);
+	const subtract = () => setCount((i) => i - 1);
+
+	return (
+		<>
+			<div class="counter">
+				<button onClick={subtract}>-</button>
+				<pre>{count}</pre>
+				<button onClick={add}>+</button>
+			</div>
+			<div class="counter-message">{children}</div>
+		</>
+	);
+}

src/components/Title.astro

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+<h1><slot /></h1>
+
+<style>
+	h1 {
+		color: red;
+	}
+</style>

src/pages/index.mdx

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+import Counter from '../components/Counter.jsx';
+import Title from '../components/Title.astro';
+export const components = { h1: Title };
+
+export const authors = [
+	{ name: 'Jane', email: 'hi@jane.com' },
+	{ name: 'John', twitter: '@john2002' },
+];
+export const published = new Date('2022-02-01');
+
+# Hello world!
+
+Written by: {new Intl.ListFormat('en').format(authors.map(d => d.name))}.
+
+Published on: {new Intl.DateTimeFormat('en', {dateStyle: 'long'}).format(published)}.
+
+<Counter client:idle>This is a **counter**!</Counter>
+
+## Syntax highlighting
+
+We also support syntax highlighting in MDX out-of-the-box! This example uses the default [Shiki](https://shiki.style) theme. See the [MDX integration docs](https://docs.astro.build/en/guides/integrations-guide/mdx/#syntax-highlighting) for configuration options.
+
+```astro
+---
+const weSupportAstro = true;
+---
+
+<h1>Hey, what theme is that? Looks nice!</h1>
+```

tsconfig.json

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+{
+  "extends": "astro/tsconfigs/strict",
+  "include": [".astro/types.d.ts", "**/*"],
+  "exclude": ["dist"]
+}