Revert to client render on text mismatch #23354
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We're going to fork the behavior of this function between concurrent roots and legacy roots. The legacy behavior is to warn in dev when the text mismatches during hydration. In concurrent roots, we'll log a recoverable error and revert to client rendering. That means this is no longer a development-only function — it affects the prod behavior, too. I haven't changed any behavior in this commit. I only rearranged the code slightly so that the dev environment check is inside the body instead of around the function call. I also threaded through an isConcurrentMode argument.
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Expands the behavior of enableClientRenderFallbackOnHydrationMismatch to check text content, too. If the text is different from what was rendered on the server, we will recover the UI by falling back to client rendering, up to the nearest Suspense boundary.
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sebmarkbage
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Feb 24, 2022
| clientText: string | number, | ||
| isConcurrentMode: boolean, | ||
| ) { | ||
| const normalizedClientText = normalizeMarkupForTextOrAttribute(clientText); |
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Since this is not prod behavior it’s a bit more perf sensitive. We can first check if the original string is equal first, which it in most cases will be and if so bail early. Only if that is not true should we normalize.
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Oh nvm. We only get here if they’re not already equal.
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Feb 24, 2022
sebmarkbage
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| @@ -231,12 +231,19 @@ export function checkForUnmatchedText( | |||
| clientText: string | number, | |||
| isConcurrentMode: boolean, | |||
| ) { | |||
| if (clientText === serverText) { | |||
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Don’t need this because we only call this function if there was a mismatch.
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Summary: This sync includes the following changes: - **[17806594c](facebook/react@17806594c )**: Move createRoot/hydrateRoot to react-dom/client ([#23385](facebook/react#23385)) //<Sebastian Markbåge>// - **[75662d6a7](facebook/react@75662d6a7 )**: Remove hacky stream.locked check, declare as byte stream instead ([#23387](facebook/react#23387)) //<Sebastian Markbåge>// - **[a82ef6d40](facebook/react@a82ef6d40 )**: Add back skipUnmountedBoundaries flag only for www ([#23383](facebook/react#23383)) //<Andrew Clark>// - **[f468816ef](facebook/react@f468816ef )**: Fix false positive hydration warnings ([#23364](facebook/react#23364)) //<Andrew Clark>// - **[5d08a24c2](facebook/react@5d08a24c2 )**: useId: Use 'H' to separate main id from hook index ([#23363](facebook/react#23363)) //<Andrew Clark>// - **[3a60844a0](facebook/react@3a60844a0 )**: Update error message for suspending at sync priority ([#23361](facebook/react#23361)) //<Andrew Clark>// - **[efe4121ee](facebook/react@efe4121ee )**: Add : to beginning and end of every useId ([#23360](facebook/react#23360)) //<Andrew Clark>// - **[42f15b324](facebook/react@42f15b324 )**: [DevTools][Transition Tracing] onTransitionComplete and onTransitionStart implmentation ([#23313](facebook/react#23313)) //<Luna Ruan>// - **[a5b22155c](facebook/react@a5b22155c )**: Warn if renderSubtreeIntoContainer is called ([#23355](facebook/react#23355)) //<Andrew Clark>// - **[52c393b5d](facebook/react@52c393b5d )**: Revert to client render on text mismatch ([#23354](facebook/react#23354)) //<Andrew Clark>// - **[1ad8d8129](facebook/react@1ad8d8129 )**: Remove object-assign polyfill ([#23351](facebook/react#23351)) //<Sebastian Markbåge>// - **[b3f3da205](facebook/react@b3f3da205 )**: Land warnOnSubscriptionInsideStartTransition flag ([#23353](facebook/react#23353)) //<Andrew Clark>// - **[990098f88](facebook/react@990098f88 )**: Re-arrange main ReactFeatureFlags module ([#23350](facebook/react#23350)) //<Andrew Clark>// - **[1f3f6db73](facebook/react@1f3f6db73 )**: Remove createMutableSource from stable exports ([#23352](facebook/react#23352)) //<Andrew Clark>// - **[587e75930](facebook/react@587e75930 )**: Remove Numeric Fallback of Symbols ([#23348](facebook/react#23348)) //<Sebastian Markbåge>// - **[40351575d](facebook/react@40351575d )**: Split writeChunk into void and return value ([#23343](facebook/react#23343)) //<Sebastian Markbåge>// - **[2c693b2de](facebook/react@2c693b2de )**: Re-add reentrancy avoidance ([#23342](facebook/react#23342)) //<Sebastian Markbåge>// - **[1760b27c0](facebook/react@1760b27c0 )**: Remove ./src/* export from public build ([#23262](facebook/react#23262)) //<Andrew Clark>// - **[552c067bb](facebook/react@552c067bb )**: Remove public export for unstable-shared-subset.js ([#23261](facebook/react#23261)) //<Andrew Clark>// Changelog: [General][Changed] - React Native sync for revisions 4de99b3...1780659 jest_e2e[run_all_tests] Reviewed By: rickhanlonii Differential Revision: D34552175 fbshipit-source-id: f1c831a45f96d335a20c3b4113196e0a42cefc03
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* Refactor warnForTextDifference We're going to fork the behavior of this function between concurrent roots and legacy roots. The legacy behavior is to warn in dev when the text mismatches during hydration. In concurrent roots, we'll log a recoverable error and revert to client rendering. That means this is no longer a development-only function — it affects the prod behavior, too. I haven't changed any behavior in this commit. I only rearranged the code slightly so that the dev environment check is inside the body instead of around the function call. I also threaded through an isConcurrentMode argument. * Revert to client render on text content mismatch Expands the behavior of enableClientRenderFallbackOnHydrationMismatch to check text content, too. If the text is different from what was rendered on the server, we will recover the UI by falling back to client rendering, up to the nearest Suspense boundary.
Saadnajmi
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Jan 15, 2023
Summary: This sync includes the following changes: - **[17806594c](facebook/react@17806594c )**: Move createRoot/hydrateRoot to react-dom/client ([facebook#23385](facebook/react#23385)) //<Sebastian Markbåge>// - **[75662d6a7](facebook/react@75662d6a7 )**: Remove hacky stream.locked check, declare as byte stream instead ([facebook#23387](facebook/react#23387)) //<Sebastian Markbåge>// - **[a82ef6d40](facebook/react@a82ef6d40 )**: Add back skipUnmountedBoundaries flag only for www ([facebook#23383](facebook/react#23383)) //<Andrew Clark>// - **[f468816ef](facebook/react@f468816ef )**: Fix false positive hydration warnings ([facebook#23364](facebook/react#23364)) //<Andrew Clark>// - **[5d08a24c2](facebook/react@5d08a24c2 )**: useId: Use 'H' to separate main id from hook index ([facebook#23363](facebook/react#23363)) //<Andrew Clark>// - **[3a60844a0](facebook/react@3a60844a0 )**: Update error message for suspending at sync priority ([facebook#23361](facebook/react#23361)) //<Andrew Clark>// - **[efe4121ee](facebook/react@efe4121ee )**: Add : to beginning and end of every useId ([facebook#23360](facebook/react#23360)) //<Andrew Clark>// - **[42f15b324](facebook/react@42f15b324 )**: [DevTools][Transition Tracing] onTransitionComplete and onTransitionStart implmentation ([facebook#23313](facebook/react#23313)) //<Luna Ruan>// - **[a5b22155c](facebook/react@a5b22155c )**: Warn if renderSubtreeIntoContainer is called ([facebook#23355](facebook/react#23355)) //<Andrew Clark>// - **[52c393b5d](facebook/react@52c393b5d )**: Revert to client render on text mismatch ([facebook#23354](facebook/react#23354)) //<Andrew Clark>// - **[1ad8d8129](facebook/react@1ad8d8129 )**: Remove object-assign polyfill ([facebook#23351](facebook/react#23351)) //<Sebastian Markbåge>// - **[b3f3da205](facebook/react@b3f3da205 )**: Land warnOnSubscriptionInsideStartTransition flag ([facebook#23353](facebook/react#23353)) //<Andrew Clark>// - **[990098f88](facebook/react@990098f88 )**: Re-arrange main ReactFeatureFlags module ([facebook#23350](facebook/react#23350)) //<Andrew Clark>// - **[1f3f6db73](facebook/react@1f3f6db73 )**: Remove createMutableSource from stable exports ([facebook#23352](facebook/react#23352)) //<Andrew Clark>// - **[587e75930](facebook/react@587e75930 )**: Remove Numeric Fallback of Symbols ([facebook#23348](facebook/react#23348)) //<Sebastian Markbåge>// - **[40351575d](facebook/react@40351575d )**: Split writeChunk into void and return value ([facebook#23343](facebook/react#23343)) //<Sebastian Markbåge>// - **[2c693b2de](facebook/react@2c693b2de )**: Re-add reentrancy avoidance ([facebook#23342](facebook/react#23342)) //<Sebastian Markbåge>// - **[1760b27c0](facebook/react@1760b27c0 )**: Remove ./src/* export from public build ([facebook#23262](facebook/react#23262)) //<Andrew Clark>// - **[552c067bb](facebook/react@552c067bb )**: Remove public export for unstable-shared-subset.js ([facebook#23261](facebook/react#23261)) //<Andrew Clark>// Changelog: [General][Changed] - React Native sync for revisions 4de99b3...1780659 jest_e2e[run_all_tests] Reviewed By: rickhanlonii Differential Revision: D34552175 fbshipit-source-id: f1c831a45f96d335a20c3b4113196e0a42cefc03
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Expands the behavior of enableClientRenderFallbackOnHydrationMismatch to check text content, too.
If the text is different from what was rendered on the server, we will recover the UI by falling back to client rendering, up to the nearest Suspense boundary.
The places where we revert to client rendering match the places where we used to only warn in development. That means we respect the
suppressHydrationWarningprop — so the name is a bit weird now, since the behavior now affects production, too. We may rename the prop in a future release.