diff --git a/packages/react-reconciler/src/ReactFiberWorkLoop.js b/packages/react-reconciler/src/ReactFiberWorkLoop.js index 934fa7327e812..b6ec683ee65fd 100644 --- a/packages/react-reconciler/src/ReactFiberWorkLoop.js +++ b/packages/react-reconciler/src/ReactFiberWorkLoop.js @@ -38,7 +38,6 @@ import { enableCache, enableTransitionTracing, useModernStrictMode, - revertRemovalOfSiblingPrerendering, disableLegacyContext, } from 'shared/ReactFeatureFlags'; import ReactSharedInternals from 'shared/ReactSharedInternals'; @@ -2441,28 +2440,14 @@ function completeUnitOfWork(unitOfWork: Fiber): void { // sibling. If there are no more siblings, return to the parent fiber. let completedWork: Fiber = unitOfWork; do { - if (revertRemovalOfSiblingPrerendering) { + if (__DEV__) { if ((completedWork.flags & Incomplete) !== NoFlags) { - // This fiber did not complete, because one of its children did not - // complete. Switch to unwinding the stack instead of completing it. - // - // The reason "unwind" and "complete" is interleaved is because when - // something suspends, we continue rendering the siblings even though - // they will be replaced by a fallback. - // TODO: Disable sibling prerendering, then remove this branch. - unwindUnitOfWork(completedWork); - return; - } - } else { - if (__DEV__) { - if ((completedWork.flags & Incomplete) !== NoFlags) { - // NOTE: If we re-enable sibling prerendering in some cases, this branch - // is where we would switch to the unwinding path. - console.error( - 'Internal React error: Expected this fiber to be complete, but ' + - "it isn't. It should have been unwound. This is a bug in React.", - ); - } + // NOTE: If we re-enable sibling prerendering in some cases, this branch + // is where we would switch to the unwinding path. + console.error( + 'Internal React error: Expected this fiber to be complete, but ' + + "it isn't. It should have been unwound. This is a bug in React.", + ); } } @@ -2566,24 +2551,9 @@ function unwindUnitOfWork(unitOfWork: Fiber): void { returnFiber.deletions = null; } - if (revertRemovalOfSiblingPrerendering) { - // If there are siblings, work on them now even though they're going to be - // replaced by a fallback. We're "prerendering" them. Historically our - // rationale for this behavior has been to initiate any lazy data requests - // in the siblings, and also to warm up the CPU cache. - // TODO: Don't prerender siblings. With `use`, we suspend the work loop - // until the data has resolved, anyway. - const siblingFiber = incompleteWork.sibling; - if (siblingFiber !== null) { - // This branch will return us to the normal work loop. - workInProgress = siblingFiber; - return; - } - } else { - // NOTE: If we re-enable sibling prerendering in some cases, this branch - // is where we would switch to the normal completion path: check if a - // sibling exists, and if so, begin work on it. - } + // NOTE: If we re-enable sibling prerendering in some cases, here we + // would switch to the normal completion path: check if a sibling + // exists, and if so, begin work on it. // Otherwise, return to the parent // $FlowFixMe[incompatible-type] we bail out when we get a null diff --git a/packages/shared/ReactFeatureFlags.js b/packages/shared/ReactFeatureFlags.js index b301c3b74fe76..58500c8239738 100644 --- a/packages/shared/ReactFeatureFlags.js +++ b/packages/shared/ReactFeatureFlags.js @@ -22,11 +22,6 @@ export const enableComponentStackLocations = true; // when it rolls out to prod. We should remove these as soon as possible. // ----------------------------------------------------------------------------- -// This is phrased as a negative so that if someone forgets to add a GK, the -// default is to enable the feature. It should only be overridden if there's -// a regression in prod. -export const revertRemovalOfSiblingPrerendering = false; - // ----------------------------------------------------------------------------- // Land or remove (moderate effort) // diff --git a/packages/shared/forks/ReactFeatureFlags.native-fb.js b/packages/shared/forks/ReactFeatureFlags.native-fb.js index 729f1c7b6c271..cc7dc4ef91d47 100644 --- a/packages/shared/forks/ReactFeatureFlags.native-fb.js +++ b/packages/shared/forks/ReactFeatureFlags.native-fb.js @@ -43,7 +43,6 @@ export const enableScopeAPI = false; export const enableCreateEventHandleAPI = false; export const enableSuspenseCallback = false; export const disableLegacyContext = false; -export const revertRemovalOfSiblingPrerendering = false; export const enableTrustedTypesIntegration = false; export const disableTextareaChildren = false; export const disableModulePatternComponents = false; diff --git a/packages/shared/forks/ReactFeatureFlags.native-oss.js b/packages/shared/forks/ReactFeatureFlags.native-oss.js index 25b14a8bd276c..ebb4f2b154db5 100644 --- a/packages/shared/forks/ReactFeatureFlags.native-oss.js +++ b/packages/shared/forks/ReactFeatureFlags.native-oss.js @@ -32,7 +32,6 @@ export const enableScopeAPI = false; export const enableCreateEventHandleAPI = false; export const enableSuspenseCallback = false; export const disableLegacyContext = false; -export const revertRemovalOfSiblingPrerendering = false; export const enableTrustedTypesIntegration = false; export const disableTextareaChildren = false; export const disableModulePatternComponents = false; diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.js index aa296a97d7bbc..b733725c9dc85 100644 --- a/packages/shared/forks/ReactFeatureFlags.test-renderer.js +++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.js @@ -32,7 +32,6 @@ export const enableScopeAPI = false; export const enableCreateEventHandleAPI = false; export const enableSuspenseCallback = false; export const disableLegacyContext = false; -export const revertRemovalOfSiblingPrerendering = false; export const enableTrustedTypesIntegration = false; export const disableTextareaChildren = false; export const disableModulePatternComponents = false; diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js index 2768dd02911d1..2554dd117a293 100644 --- a/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js +++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.native.js @@ -32,7 +32,6 @@ export const enableScopeAPI = false; export const enableCreateEventHandleAPI = false; export const enableSuspenseCallback = false; export const disableLegacyContext = false; -export const revertRemovalOfSiblingPrerendering = false; export const enableTrustedTypesIntegration = false; export const disableTextareaChildren = false; export const disableModulePatternComponents = false; diff --git a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js index 42bdea1bb58d8..25a318e81cf24 100644 --- a/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js +++ b/packages/shared/forks/ReactFeatureFlags.test-renderer.www.js @@ -32,7 +32,6 @@ export const enableScopeAPI = true; export const enableCreateEventHandleAPI = false; export const enableSuspenseCallback = true; export const disableLegacyContext = false; -export const revertRemovalOfSiblingPrerendering = false; export const enableTrustedTypesIntegration = false; export const disableTextareaChildren = false; export const disableModulePatternComponents = true; diff --git a/packages/shared/forks/ReactFeatureFlags.www-dynamic.js b/packages/shared/forks/ReactFeatureFlags.www-dynamic.js index a958bf5f66092..2a45a1969cad6 100644 --- a/packages/shared/forks/ReactFeatureFlags.www-dynamic.js +++ b/packages/shared/forks/ReactFeatureFlags.www-dynamic.js @@ -39,12 +39,6 @@ export const enableSchedulingProfiler = __VARIANT__; // so we don't need to use __VARIANT__ to get extra coverage. export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__; -// This flag only exists so it can be connected to a www GK that acts as a -// killswitch. We don't run our tests against the `true` value because 1) it -// affects too many tests 2) it shouldn't break anything. But it is mildly -// risky, hence this extra precaution. -export const revertRemovalOfSiblingPrerendering = false; - // TODO: These flags are hard-coded to the default values used in open source. // Update the tests so that they pass in either mode, then set these // to __VARIANT__. diff --git a/packages/shared/forks/ReactFeatureFlags.www.js b/packages/shared/forks/ReactFeatureFlags.www.js index 98311679f2474..d6143be018d9f 100644 --- a/packages/shared/forks/ReactFeatureFlags.www.js +++ b/packages/shared/forks/ReactFeatureFlags.www.js @@ -18,7 +18,6 @@ export const { disableInputAttributeSyncing, disableIEWorkarounds, enableTrustedTypesIntegration, - revertRemovalOfSiblingPrerendering, replayFailedUnitOfWorkWithInvokeGuardedCallback, enableLegacyFBSupport, enableDebugTracing,