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[Fizz] Fix children rendering in custom elements with enableCustomElementPropertySupport #27511

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Merged
merged 1 commit into from
Oct 12, 2023
+45 −22
Merged

[Fizz] Fix children rendering in custom elements with enableCustomElementPropertySupport #27511

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41 changes: 19 additions & 22 deletions packages/react-dom-bindings/src/server/ReactFizzConfigDOM.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3134,32 +3134,13 @@ function pushStartCustomElement(

let children = null;
let innerHTML = null;
for (let propKey in props) {
for (const propKey in props) {
if (hasOwnProperty.call(props, propKey)) {
let propValue = props[propKey];
if (propValue == null) {
continue;
}
if (
enableCustomElementPropertySupport &&
(typeof propValue === 'function' || typeof propValue === 'object')
) {
// It is normal to render functions and objects on custom elements when
// client rendering, but when server rendering the output isn't useful,
// so skip it.
continue;
}
if (enableCustomElementPropertySupport && propValue === false) {
continue;
}
if (enableCustomElementPropertySupport && propValue === true) {
propValue = '';
}
if (enableCustomElementPropertySupport && propKey === 'className') {
// className gets rendered as class on the client, so it should be
// rendered as class on the server.
propKey = 'class';
}
let attributeName = propKey;
switch (propKey) {
case 'children':
children = propValue;
Expand All @@ -3174,15 +3155,31 @@ function pushStartCustomElement(
case 'suppressHydrationWarning':
// Ignored. These are built-in to React on the client.
break;
case 'className':
if (enableCustomElementPropertySupport) {
// className gets rendered as class on the client, so it should be
// rendered as class on the server.
attributeName = 'class';
}
// intentional fallthrough
default:
if (
isAttributeNameSafe(propKey) &&
typeof propValue !== 'function' &&
typeof propValue !== 'symbol'
) {
if (enableCustomElementPropertySupport) {
if (propValue === false) {
continue;
} else if (propValue === true) {
propValue = '';
} else if (typeof propValue === 'object') {
continue;
}
}
target.push(
attributeSeparator,
stringToChunk(propKey),
stringToChunk(attributeName),
attributeAssign,
stringToChunk(escapeTextForBrowser(propValue)),
attributeEnd,
Expand Down
26 changes: 26 additions & 0 deletions packages/react-dom/src/__tests__/ReactDOMFizzServer-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -3624,6 +3624,32 @@ describe('ReactDOMFizzServer', () => {
);
});

// bugfix: https://github.com/facebook/react/issues/27286 affecting enableCustomElementPropertySupport flag
it('can render custom elements with children on ther server', async () => {
await act(() => {
renderToPipeableStream(
<html>
<body>
<my-element>
<div>foo</div>
</my-element>
</body>
</html>,
).pipe(writable);
});

expect(getVisibleChildren(document)).toEqual(
<html>
<head />
<body>
<my-element>
<div>foo</div>
</my-element>
</body>
</html>,
);
});

describe('error escaping', () => {
it('escapes error hash, message, and component stack values in directly flushed errors (html escaping)', async () => {
window.__outlet = {};
Expand Down