diff --git a/.changeset/many-schools-grab.md b/.changeset/many-schools-grab.md
new file mode 100644
index 0000000000..92c3041ebe
--- /dev/null
+++ b/.changeset/many-schools-grab.md
@@ -0,0 +1,10 @@
+---
+'astro': patch
+'@astrojs/renderer-preact': patch
+'@astrojs/renderer-react': patch
+'@astrojs/renderer-svelte': patch
+'@astrojs/renderer-vue': patch
+'@astrojs/renderer-solid': patch
+---
+
+Fix behavior of renderers when no children are passed in
diff --git a/netlify.toml b/netlify.toml
index aad6be03c6..402f958ece 100644
--- a/netlify.toml
+++ b/netlify.toml
@@ -1,2 +1,2 @@
[build]
- ignore = "git diff --quiet main HEAD www/ docs/"
+ ignore = "git diff --quiet $COMMIT_REF $CACHED_COMMIT_REF -- docs/ www/"
diff --git a/packages/astro/test/fixtures/slots-preact/src/components/Counter.jsx b/packages/astro/test/fixtures/slots-preact/src/components/Counter.jsx
new file mode 100644
index 0000000000..cc11b9ee3f
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-preact/src/components/Counter.jsx
@@ -0,0 +1,21 @@
+import { h, Fragment } from 'preact';
+import { useState } from 'preact/hooks'
+
+export default function Counter({ children, count: initialCount, case: id }) {
+ const [count, setCount] = useState(initialCount);
+ const add = () => setCount((i) => i + 1);
+ const subtract = () => setCount((i) => i - 1);
+
+ return (
+ <>
+
+
+ {children ||
Fallback
}
+
+ >
+ );
+}
diff --git a/packages/astro/test/fixtures/slots-preact/src/pages/index.astro b/packages/astro/test/fixtures/slots-preact/src/pages/index.astro
new file mode 100644
index 0000000000..f8f101e73e
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-preact/src/pages/index.astro
@@ -0,0 +1,11 @@
+---
+import Counter from '../components/Counter.jsx'
+---
+
+
+
+ {0}
+ {false}
+ {''}
+ Hello world!
+
diff --git a/packages/astro/test/fixtures/slots-react/src/components/Counter.jsx b/packages/astro/test/fixtures/slots-react/src/components/Counter.jsx
new file mode 100644
index 0000000000..93f267ca4f
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-react/src/components/Counter.jsx
@@ -0,0 +1,20 @@
+import React, { useState } from 'react';
+
+export default function Counter({ children, count: initialCount, case: id }) {
+ const [count, setCount] = useState(initialCount);
+ const add = () => setCount((i) => i + 1);
+ const subtract = () => setCount((i) => i - 1);
+
+ return (
+ <>
+
+
+ {children ||
Fallback
}
+
+ >
+ );
+}
diff --git a/packages/astro/test/fixtures/slots-react/src/pages/index.astro b/packages/astro/test/fixtures/slots-react/src/pages/index.astro
new file mode 100644
index 0000000000..f8f101e73e
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-react/src/pages/index.astro
@@ -0,0 +1,11 @@
+---
+import Counter from '../components/Counter.jsx'
+---
+
+
+
+ {0}
+ {false}
+ {''}
+ Hello world!
+
diff --git a/packages/astro/test/fixtures/slots-solid/src/components/Counter.jsx b/packages/astro/test/fixtures/slots-solid/src/components/Counter.jsx
new file mode 100644
index 0000000000..cbd8ccf225
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-solid/src/components/Counter.jsx
@@ -0,0 +1,14 @@
+import React, { useState } from 'react';
+
+export default function Counter({ children, count: initialCount, case: id }) {
+ return (
+ <>
+
+
+ {children ||
Fallback
}
+
+ >
+ );
+}
diff --git a/packages/astro/test/fixtures/slots-solid/src/pages/index.astro b/packages/astro/test/fixtures/slots-solid/src/pages/index.astro
new file mode 100644
index 0000000000..f8f101e73e
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-solid/src/pages/index.astro
@@ -0,0 +1,11 @@
+---
+import Counter from '../components/Counter.jsx'
+---
+
+
+
+ {0}
+ {false}
+ {''}
+ Hello world!
+
diff --git a/packages/astro/test/fixtures/slots-svelte/src/components/Counter.svelte b/packages/astro/test/fixtures/slots-svelte/src/components/Counter.svelte
new file mode 100644
index 0000000000..11901049e9
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-svelte/src/components/Counter.svelte
@@ -0,0 +1,36 @@
+
+
+
+
+
+ Fallback
+
+
+
+
diff --git a/packages/astro/test/fixtures/slots-svelte/src/pages/index.astro b/packages/astro/test/fixtures/slots-svelte/src/pages/index.astro
new file mode 100644
index 0000000000..bc25c17c71
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-svelte/src/pages/index.astro
@@ -0,0 +1,11 @@
+---
+import Counter from '../components/Counter.svelte'
+---
+
+
+
+ {0}
+ {false}
+ {''}
+ Hello world!
+
diff --git a/packages/astro/test/fixtures/slots-vue/src/components/Counter.vue b/packages/astro/test/fixtures/slots-vue/src/components/Counter.vue
new file mode 100644
index 0000000000..304511560d
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-vue/src/components/Counter.vue
@@ -0,0 +1,46 @@
+
+
+
+
+ Fallback
+
+
+
+
+
+
+
diff --git a/packages/astro/test/fixtures/slots-vue/src/pages/index.astro b/packages/astro/test/fixtures/slots-vue/src/pages/index.astro
new file mode 100644
index 0000000000..65ca267269
--- /dev/null
+++ b/packages/astro/test/fixtures/slots-vue/src/pages/index.astro
@@ -0,0 +1,11 @@
+---
+import Counter from '../components/Counter.vue'
+---
+
+
+
+ {0}
+ {false}
+ {''}
+ Hello world!
+
diff --git a/packages/astro/test/slots-preact.test.js b/packages/astro/test/slots-preact.test.js
new file mode 100644
index 0000000000..1f85794755
--- /dev/null
+++ b/packages/astro/test/slots-preact.test.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Slots: Preact', () => {
+ let fixture;
+
+ before(async () => {
+ fixture = await loadFixture({ projectRoot: './fixtures/slots-preact/', renderers: ['@astrojs/renderer-preact'] });
+ await fixture.build();
+ });
+
+ it('Renders default slot', async () => {
+ const html = await fixture.readFile('/index.html');
+ const $ = cheerio.load(html);
+
+ expect($('#default-self-closing').text().trim()).to.equal('Fallback');
+ expect($('#default-empty').text().trim()).to.equal('Fallback');
+ expect($('#zero').text().trim()).to.equal('0');
+ expect($('#false').text().trim()).to.equal('');
+ expect($('#string').text().trim()).to.equal('');
+ expect($('#content').text().trim()).to.equal('Hello world!');
+ });
+});
diff --git a/packages/astro/test/slots-react.test.js b/packages/astro/test/slots-react.test.js
new file mode 100644
index 0000000000..d65411970a
--- /dev/null
+++ b/packages/astro/test/slots-react.test.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Slots: React', () => {
+ let fixture;
+
+ before(async () => {
+ fixture = await loadFixture({ projectRoot: './fixtures/slots-react/', renderers: ['@astrojs/renderer-react'] });
+ await fixture.build();
+ });
+
+ it('Renders default slot', async () => {
+ const html = await fixture.readFile('/index.html');
+ const $ = cheerio.load(html);
+
+ expect($('#default-self-closing').text().trim()).to.equal('Fallback');
+ expect($('#default-empty').text().trim()).to.equal('Fallback');
+ expect($('#zero').text().trim()).to.equal('0');
+ expect($('#false').text().trim()).to.equal('');
+ expect($('#string').text().trim()).to.equal('');
+ expect($('#content').text().trim()).to.equal('Hello world!');
+ });
+});
diff --git a/packages/astro/test/slots-solid.test.js b/packages/astro/test/slots-solid.test.js
new file mode 100644
index 0000000000..29c2005d4d
--- /dev/null
+++ b/packages/astro/test/slots-solid.test.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Slots: Solid', () => {
+ let fixture;
+
+ before(async () => {
+ fixture = await loadFixture({ projectRoot: './fixtures/slots-solid/', renderers: ['@astrojs/renderer-solid'] });
+ await fixture.build();
+ });
+
+ it('Renders default slot', async () => {
+ const html = await fixture.readFile('/index.html');
+ const $ = cheerio.load(html);
+
+ expect($('#default-self-closing').text().trim()).to.equal('Fallback');
+ expect($('#default-empty').text().trim()).to.equal('Fallback');
+ expect($('#zero').text().trim()).to.equal('0');
+ expect($('#false').text().trim()).to.equal('');
+ expect($('#string').text().trim()).to.equal('');
+ expect($('#content').text().trim()).to.equal('Hello world!');
+ });
+});
diff --git a/packages/astro/test/slots-svelte.test.js b/packages/astro/test/slots-svelte.test.js
new file mode 100644
index 0000000000..08296f8a1a
--- /dev/null
+++ b/packages/astro/test/slots-svelte.test.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Slots: Svelte', () => {
+ let fixture;
+
+ before(async () => {
+ fixture = await loadFixture({ projectRoot: './fixtures/slots-svelte/', renderers: ['@astrojs/renderer-svelte'] });
+ await fixture.build();
+ });
+
+ it('Renders default slot', async () => {
+ const html = await fixture.readFile('/index.html');
+ const $ = cheerio.load(html);
+
+ expect($('#default-self-closing').text().trim()).to.equal('Fallback');
+ expect($('#default-empty').text().trim()).to.equal('Fallback');
+ expect($('#zero').text().trim()).to.equal('');
+ expect($('#false').text().trim()).to.equal('');
+ expect($('#string').text().trim()).to.equal('');
+ expect($('#content').text().trim()).to.equal('Hello world!');
+ });
+});
diff --git a/packages/astro/test/slots-vue.test.js b/packages/astro/test/slots-vue.test.js
new file mode 100644
index 0000000000..7a52f7aab4
--- /dev/null
+++ b/packages/astro/test/slots-vue.test.js
@@ -0,0 +1,24 @@
+import { expect } from 'chai';
+import cheerio from 'cheerio';
+import { loadFixture } from './test-utils.js';
+
+describe('Slots: Vue', () => {
+ let fixture;
+
+ before(async () => {
+ fixture = await loadFixture({ projectRoot: './fixtures/slots-vue/', renderers: ['@astrojs/renderer-vue'] });
+ await fixture.build();
+ });
+
+ it('Renders default slot', async () => {
+ const html = await fixture.readFile('/index.html');
+ const $ = cheerio.load(html);
+
+ expect($('#default-self-closing').text().trim()).to.equal('Fallback');
+ expect($('#default-empty').text().trim()).to.equal('Fallback');
+ expect($('#zero').text().trim()).to.equal('0');
+ expect($('#false').text().trim()).to.equal('');
+ expect($('#string').text().trim()).to.equal('');
+ expect($('#content').text().trim()).to.equal('Hello world!');
+ });
+});
diff --git a/packages/renderers/renderer-preact/client.js b/packages/renderers/renderer-preact/client.js
index 22dd281241..85c18c76c9 100644
--- a/packages/renderers/renderer-preact/client.js
+++ b/packages/renderers/renderer-preact/client.js
@@ -1,4 +1,4 @@
import { h, render } from 'preact';
import StaticHtml from './static-html.js';
-export default (element) => (Component, props, children) => render(h(Component, props, h(StaticHtml, { value: children })), element);
+export default (element) => (Component, props, children) => render(h(Component, props, children != null ? h(StaticHtml, { value: children }) : children), element);
diff --git a/packages/renderers/renderer-preact/server.js b/packages/renderers/renderer-preact/server.js
index b50468ab5f..696217abb6 100644
--- a/packages/renderers/renderer-preact/server.js
+++ b/packages/renderers/renderer-preact/server.js
@@ -25,7 +25,7 @@ function check(Component, props, children) {
}
function renderToStaticMarkup(Component, props, children) {
- const html = render(h(Component, { ...props, children: h(StaticHtml, { value: children }), innerHTML: children }));
+ const html = render(h(Component, props, children != null ? h(StaticHtml, { value: children }) : children));
return { html };
}
diff --git a/packages/renderers/renderer-react/client.js b/packages/renderers/renderer-react/client.js
index b699a76d00..aa29d1ba99 100644
--- a/packages/renderers/renderer-react/client.js
+++ b/packages/renderers/renderer-react/client.js
@@ -3,4 +3,11 @@ import { hydrate } from 'react-dom';
import StaticHtml from './static-html.js';
export default (element) => (Component, props, children) =>
- hydrate(createElement(Component, { ...props, suppressHydrationWarning: true }, createElement(StaticHtml, { value: children, suppressHydrationWarning: true })), element);
+ hydrate(
+ createElement(
+ Component,
+ { ...props, suppressHydrationWarning: true },
+ children != null ? createElement(StaticHtml, { value: children, suppressHydrationWarning: true }) : children
+ ),
+ element
+ );
diff --git a/packages/renderers/renderer-react/server.js b/packages/renderers/renderer-react/server.js
index 905390f38a..2660c8762d 100644
--- a/packages/renderers/renderer-react/server.js
+++ b/packages/renderers/renderer-react/server.js
@@ -50,7 +50,7 @@ function renderToStaticMarkup(Component, props, children, metadata) {
delete props['class'];
const vnode = React.createElement(Component, {
...props,
- children: React.createElement(StaticHtml, { value: children }),
+ children: children != null ? React.createElement(StaticHtml, { value: children }) : undefined,
});
let html;
if (metadata && metadata.hydrate) {
diff --git a/packages/renderers/renderer-solid/client.js b/packages/renderers/renderer-solid/client.js
index f4cdb4ead4..9aa0ecbb80 100644
--- a/packages/renderers/renderer-solid/client.js
+++ b/packages/renderers/renderer-solid/client.js
@@ -1,8 +1,11 @@
import { hydrate, createComponent } from 'solid-js/web';
export default (element) => (Component, props, childHTML) => {
- const children = document.createElement('astro-fragment');
- children.innerHTML = childHTML;
+ let children;
+ if (childHTML != null) {
+ children = document.createElement('astro-fragment');
+ children.innerHTML = childHTML;
+ }
// Using Solid's `hydrate` method ensures that a `root` is created
// in order to properly handle reactivity. It also handles
diff --git a/packages/renderers/renderer-solid/server.js b/packages/renderers/renderer-solid/server.js
index 101f3480a5..238d7531a9 100644
--- a/packages/renderers/renderer-solid/server.js
+++ b/packages/renderers/renderer-solid/server.js
@@ -16,7 +16,7 @@ function renderToStaticMarkup(Component, props, children) {
...props,
// In Solid SSR mode, `ssr` creates the expected structure for `children`.
// In Solid client mode, `ssr` is just a stub.
- children: ssr(`${children}`),
+ children: children != null ? ssr(`${children}`) : children,
})
);
return { html: html + `` };
diff --git a/packages/renderers/renderer-svelte/Wrapper.svelte b/packages/renderers/renderer-svelte/Wrapper.svelte
index 78d4a402b1..c1ee77d918 100644
--- a/packages/renderers/renderer-svelte/Wrapper.svelte
+++ b/packages/renderers/renderer-svelte/Wrapper.svelte
@@ -13,7 +13,7 @@ const { __astro_component: Component, __astro_children, ...props } = $$props;
- {#if __astro_children}
+ {#if __astro_children != null}
{@html __astro_children}
diff --git a/packages/renderers/renderer-svelte/Wrapper.svelte.ssr.js b/packages/renderers/renderer-svelte/Wrapper.svelte.ssr.js
index 909e719fb9..b866f0894f 100644
--- a/packages/renderers/renderer-svelte/Wrapper.svelte.ssr.js
+++ b/packages/renderers/renderer-svelte/Wrapper.svelte.ssr.js
@@ -3,15 +3,12 @@ import { create_ssr_component, missing_component, validate_component } from 'sve
const App = create_ssr_component(($$result, $$props, $$bindings, slots) => {
const { __astro_component: Component, __astro_children, ...props } = $$props;
+ const children = {};
+ if (__astro_children != null) {
+ children.default = () => `${__astro_children}`;
+ }
- return `${validate_component(Component || missing_component, 'svelte:component').$$render(
- $$result,
- Object.assign(props),
- {},
- {
- default: () => `${__astro_children ? `${__astro_children}` : ``}`,
- }
- )}`;
+ return `${validate_component(Component || missing_component, 'svelte:component').$$render($$result, Object.assign(props), {}, children)}`;
});
export default App;
diff --git a/packages/renderers/renderer-vue/client.js b/packages/renderers/renderer-vue/client.js
index dfbd48a30f..edda137cd8 100644
--- a/packages/renderers/renderer-vue/client.js
+++ b/packages/renderers/renderer-vue/client.js
@@ -5,6 +5,10 @@ export default (element) => (Component, props, children) => {
delete props['class'];
// Expose name on host component for Vue devtools
const name = Component.name ? `${Component.name} Host` : undefined;
- const app = createSSRApp({ name, render: () => h(Component, props, { default: () => h(StaticHtml, { value: children }) }) });
+ const slots = {};
+ if (children != null) {
+ slots.default = () => h(StaticHtml, { value: children });
+ }
+ const app = createSSRApp({ name, render: () => h(Component, props, slots) });
app.mount(element, true);
};
diff --git a/packages/renderers/renderer-vue/server.js b/packages/renderers/renderer-vue/server.js
index b4254458d3..83e389b5dd 100644
--- a/packages/renderers/renderer-vue/server.js
+++ b/packages/renderers/renderer-vue/server.js
@@ -7,7 +7,11 @@ function check(Component) {
}
async function renderToStaticMarkup(Component, props, children) {
- const app = createSSRApp({ render: () => h(Component, props, { default: () => h(StaticHtml, { value: children }) }) });
+ const slots = {};
+ if (children != null) {
+ slots.default = () => h(StaticHtml, { value: children });
+ }
+ const app = createSSRApp({ render: () => h(Component, props, slots) });
const html = await renderToString(app);
return { html };
}