mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Brian Vaughn
3133 lines
103 KiB
JavaScript
3133 lines
103 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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import type {Thenable, Wakeable} from 'shared/ReactTypes';
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import type {Fiber, FiberRoot} from './ReactInternalTypes';
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import type {Lanes, Lane} from './ReactFiberLane.new';
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import type {SuspenseState} from './ReactFiberSuspenseComponent.new';
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import type {StackCursor} from './ReactFiberStack.new';
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import type {FunctionComponentUpdateQueue} from './ReactFiberHooks.new';
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import type {Flags} from './ReactFiberFlags';
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import {
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warnAboutDeprecatedLifecycles,
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enableSuspenseServerRenderer,
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replayFailedUnitOfWorkWithInvokeGuardedCallback,
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enableProfilerTimer,
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enableProfilerCommitHooks,
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enableProfilerNestedUpdatePhase,
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enableProfilerNestedUpdateScheduledHook,
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warnAboutUnmockedScheduler,
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deferRenderPhaseUpdateToNextBatch,
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enableDebugTracing,
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enableSchedulingProfiler,
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disableSchedulerTimeoutInWorkLoop,
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enableStrictEffects,
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skipUnmountedBoundaries,
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enableUpdaterTracking,
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} from 'shared/ReactFeatureFlags';
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import ReactSharedInternals from 'shared/ReactSharedInternals';
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import invariant from 'shared/invariant';
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import {
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scheduleCallback,
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cancelCallback,
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shouldYield,
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requestPaint,
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now,
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ImmediatePriority as ImmediateSchedulerPriority,
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UserBlockingPriority as UserBlockingSchedulerPriority,
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NormalPriority as NormalSchedulerPriority,
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IdlePriority as IdleSchedulerPriority,
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} from './Scheduler';
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import {
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flushSyncCallbacks,
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flushSyncCallbacksOnlyInLegacyMode,
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scheduleSyncCallback,
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scheduleLegacySyncCallback,
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} from './ReactFiberSyncTaskQueue.new';
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import {
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NoFlags as NoHookEffect,
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Passive as HookPassive,
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} from './ReactHookEffectTags';
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import {
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logCommitStarted,
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logCommitStopped,
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logLayoutEffectsStarted,
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logLayoutEffectsStopped,
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logPassiveEffectsStarted,
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logPassiveEffectsStopped,
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logRenderStarted,
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logRenderStopped,
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} from './DebugTracing';
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import {
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markCommitStarted,
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markCommitStopped,
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markLayoutEffectsStarted,
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markLayoutEffectsStopped,
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markPassiveEffectsStarted,
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markPassiveEffectsStopped,
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markRenderStarted,
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markRenderYielded,
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markRenderStopped,
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} from './SchedulingProfiler';
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// The scheduler is imported here *only* to detect whether it's been mocked
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import * as Scheduler from 'scheduler';
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import {
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resetAfterCommit,
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scheduleTimeout,
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cancelTimeout,
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noTimeout,
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warnsIfNotActing,
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afterActiveInstanceBlur,
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clearContainer,
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getCurrentEventPriority,
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supportsMicrotasks,
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errorHydratingContainer,
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scheduleMicrotask,
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} from './ReactFiberHostConfig';
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import {
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createWorkInProgress,
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assignFiberPropertiesInDEV,
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} from './ReactFiber.new';
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import {
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NoMode,
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StrictLegacyMode,
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ProfileMode,
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ConcurrentMode,
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} from './ReactTypeOfMode';
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import {
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HostRoot,
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IndeterminateComponent,
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ClassComponent,
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SuspenseComponent,
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SuspenseListComponent,
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FunctionComponent,
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ForwardRef,
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MemoComponent,
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SimpleMemoComponent,
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Profiler,
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} from './ReactWorkTags';
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import {LegacyRoot} from './ReactRootTags';
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import {
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NoFlags,
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Placement,
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PassiveStatic,
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Incomplete,
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HostEffectMask,
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Hydrating,
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BeforeMutationMask,
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MutationMask,
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LayoutMask,
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PassiveMask,
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MountPassiveDev,
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MountLayoutDev,
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} from './ReactFiberFlags';
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import {
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NoLanes,
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NoLane,
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SyncLane,
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NoTimestamp,
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claimNextTransitionLane,
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claimNextRetryLane,
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includesSomeLane,
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isSubsetOfLanes,
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mergeLanes,
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removeLanes,
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pickArbitraryLane,
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includesNonIdleWork,
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includesOnlyRetries,
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includesOnlyTransitions,
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shouldTimeSlice,
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getNextLanes,
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markStarvedLanesAsExpired,
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getLanesToRetrySynchronouslyOnError,
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getMostRecentEventTime,
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markRootUpdated,
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markRootSuspended as markRootSuspended_dontCallThisOneDirectly,
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markRootPinged,
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markRootEntangled,
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markRootFinished,
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getHighestPriorityLane,
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addFiberToLanesMap,
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movePendingFibersToMemoized,
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} from './ReactFiberLane.new';
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import {
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DiscreteEventPriority,
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ContinuousEventPriority,
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DefaultEventPriority,
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IdleEventPriority,
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getCurrentUpdatePriority,
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setCurrentUpdatePriority,
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lowerEventPriority,
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lanesToEventPriority,
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} from './ReactEventPriorities.new';
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import {requestCurrentTransition, NoTransition} from './ReactFiberTransition';
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import {beginWork as originalBeginWork} from './ReactFiberBeginWork.new';
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import {completeWork} from './ReactFiberCompleteWork.new';
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import {unwindWork, unwindInterruptedWork} from './ReactFiberUnwindWork.new';
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import {
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throwException,
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createRootErrorUpdate,
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createClassErrorUpdate,
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} from './ReactFiberThrow.new';
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import {
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commitBeforeMutationEffects,
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commitLayoutEffects,
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commitMutationEffects,
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commitPassiveEffectDurations,
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commitPassiveMountEffects,
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commitPassiveUnmountEffects,
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invokeLayoutEffectMountInDEV,
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invokePassiveEffectMountInDEV,
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invokeLayoutEffectUnmountInDEV,
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invokePassiveEffectUnmountInDEV,
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} from './ReactFiberCommitWork.new';
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import {enqueueUpdate} from './ReactUpdateQueue.new';
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import {resetContextDependencies} from './ReactFiberNewContext.new';
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import {
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resetHooksAfterThrow,
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ContextOnlyDispatcher,
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getIsUpdatingOpaqueValueInRenderPhaseInDEV,
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} from './ReactFiberHooks.new';
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import {createCapturedValue} from './ReactCapturedValue';
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import {
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push as pushToStack,
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pop as popFromStack,
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createCursor,
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} from './ReactFiberStack.new';
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import {enqueueInterleavedUpdates} from './ReactFiberInterleavedUpdates.new';
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import {
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markNestedUpdateScheduled,
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recordCommitTime,
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resetNestedUpdateFlag,
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startProfilerTimer,
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stopProfilerTimerIfRunningAndRecordDelta,
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syncNestedUpdateFlag,
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} from './ReactProfilerTimer.new';
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// DEV stuff
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import getComponentNameFromFiber from 'react-reconciler/src/getComponentNameFromFiber';
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import ReactStrictModeWarnings from './ReactStrictModeWarnings.new';
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import {
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isRendering as ReactCurrentDebugFiberIsRenderingInDEV,
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current as ReactCurrentFiberCurrent,
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resetCurrentFiber as resetCurrentDebugFiberInDEV,
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setCurrentFiber as setCurrentDebugFiberInDEV,
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} from './ReactCurrentFiber';
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import {
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invokeGuardedCallback,
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hasCaughtError,
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clearCaughtError,
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} from 'shared/ReactErrorUtils';
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import {
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onCommitRoot as onCommitRootDevTools,
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onPostCommitRoot as onPostCommitRootDevTools,
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isDevToolsPresent,
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} from './ReactFiberDevToolsHook.new';
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import {onCommitRoot as onCommitRootTestSelector} from './ReactTestSelectors';
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// Used by `act`
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import enqueueTask from 'shared/enqueueTask';
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const ceil = Math.ceil;
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const {
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ReactCurrentDispatcher,
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ReactCurrentOwner,
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ReactCurrentBatchConfig,
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IsSomeRendererActing,
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} = ReactSharedInternals;
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type ExecutionContext = number;
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export const NoContext = /* */ 0b000000;
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const BatchedContext = /* */ 0b000001;
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const EventContext = /* */ 0b000010;
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const LegacyUnbatchedContext = /* */ 0b000100;
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const RenderContext = /* */ 0b001000;
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const CommitContext = /* */ 0b010000;
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export const RetryAfterError = /* */ 0b100000;
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type RootExitStatus = 0 | 1 | 2 | 3 | 4 | 5;
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const RootIncomplete = 0;
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const RootFatalErrored = 1;
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const RootErrored = 2;
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const RootSuspended = 3;
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const RootSuspendedWithDelay = 4;
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const RootCompleted = 5;
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// Describes where we are in the React execution stack
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let executionContext: ExecutionContext = NoContext;
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// The root we're working on
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let workInProgressRoot: FiberRoot | null = null;
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// The fiber we're working on
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let workInProgress: Fiber | null = null;
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// The lanes we're rendering
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let workInProgressRootRenderLanes: Lanes = NoLanes;
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// Stack that allows components to change the render lanes for its subtree
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// This is a superset of the lanes we started working on at the root. The only
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// case where it's different from `workInProgressRootRenderLanes` is when we
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// enter a subtree that is hidden and needs to be unhidden: Suspense and
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// Offscreen component.
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//
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// Most things in the work loop should deal with workInProgressRootRenderLanes.
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// Most things in begin/complete phases should deal with subtreeRenderLanes.
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export let subtreeRenderLanes: Lanes = NoLanes;
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const subtreeRenderLanesCursor: StackCursor<Lanes> = createCursor(NoLanes);
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// Whether to root completed, errored, suspended, etc.
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let workInProgressRootExitStatus: RootExitStatus = RootIncomplete;
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// A fatal error, if one is thrown
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let workInProgressRootFatalError: mixed = null;
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// "Included" lanes refer to lanes that were worked on during this render. It's
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// slightly different than `renderLanes` because `renderLanes` can change as you
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// enter and exit an Offscreen tree. This value is the combination of all render
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// lanes for the entire render phase.
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let workInProgressRootIncludedLanes: Lanes = NoLanes;
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// The work left over by components that were visited during this render. Only
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// includes unprocessed updates, not work in bailed out children.
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let workInProgressRootSkippedLanes: Lanes = NoLanes;
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// Lanes that were updated (in an interleaved event) during this render.
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let workInProgressRootUpdatedLanes: Lanes = NoLanes;
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// Lanes that were pinged (in an interleaved event) during this render.
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let workInProgressRootPingedLanes: Lanes = NoLanes;
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// The most recent time we committed a fallback. This lets us ensure a train
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// model where we don't commit new loading states in too quick succession.
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let globalMostRecentFallbackTime: number = 0;
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const FALLBACK_THROTTLE_MS: number = 500;
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// The absolute time for when we should start giving up on rendering
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// more and prefer CPU suspense heuristics instead.
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let workInProgressRootRenderTargetTime: number = Infinity;
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// How long a render is supposed to take before we start following CPU
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// suspense heuristics and opt out of rendering more content.
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const RENDER_TIMEOUT_MS = 500;
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function resetRenderTimer() {
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workInProgressRootRenderTargetTime = now() + RENDER_TIMEOUT_MS;
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}
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export function getRenderTargetTime(): number {
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return workInProgressRootRenderTargetTime;
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}
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let hasUncaughtError = false;
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let firstUncaughtError = null;
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let legacyErrorBoundariesThatAlreadyFailed: Set<mixed> | null = null;
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// Only used when enableProfilerNestedUpdateScheduledHook is true;
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// to track which root is currently committing layout effects.
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let rootCommittingMutationOrLayoutEffects: FiberRoot | null = null;
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let rootDoesHavePassiveEffects: boolean = false;
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let rootWithPendingPassiveEffects: FiberRoot | null = null;
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let pendingPassiveEffectsLanes: Lanes = NoLanes;
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let pendingPassiveProfilerEffects: Array<Fiber> = [];
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// Use these to prevent an infinite loop of nested updates
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const NESTED_UPDATE_LIMIT = 50;
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let nestedUpdateCount: number = 0;
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let rootWithNestedUpdates: FiberRoot | null = null;
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const NESTED_PASSIVE_UPDATE_LIMIT = 50;
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let nestedPassiveUpdateCount: number = 0;
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// If two updates are scheduled within the same event, we should treat their
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// event times as simultaneous, even if the actual clock time has advanced
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// between the first and second call.
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let currentEventTime: number = NoTimestamp;
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let currentEventTransitionLane: Lanes = NoLanes;
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// Dev only flag that tracks if passive effects are currently being flushed.
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// We warn about state updates for unmounted components differently in this case.
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let isFlushingPassiveEffects = false;
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export function getWorkInProgressRoot(): FiberRoot | null {
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return workInProgressRoot;
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}
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export function requestEventTime() {
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if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
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// We're inside React, so it's fine to read the actual time.
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return now();
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}
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// We're not inside React, so we may be in the middle of a browser event.
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if (currentEventTime !== NoTimestamp) {
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// Use the same start time for all updates until we enter React again.
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return currentEventTime;
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}
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// This is the first update since React yielded. Compute a new start time.
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currentEventTime = now();
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return currentEventTime;
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}
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export function getCurrentTime() {
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return now();
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}
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export function requestUpdateLane(fiber: Fiber): Lane {
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// Special cases
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const mode = fiber.mode;
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if ((mode & ConcurrentMode) === NoMode) {
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return (SyncLane: Lane);
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} else if (
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!deferRenderPhaseUpdateToNextBatch &&
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(executionContext & RenderContext) !== NoContext &&
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workInProgressRootRenderLanes !== NoLanes
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) {
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// This is a render phase update. These are not officially supported. The
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// old behavior is to give this the same "thread" (expiration time) as
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// whatever is currently rendering. So if you call `setState` on a component
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// that happens later in the same render, it will flush. Ideally, we want to
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// remove the special case and treat them as if they came from an
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// interleaved event. Regardless, this pattern is not officially supported.
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// This behavior is only a fallback. The flag only exists until we can roll
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// out the setState warning, since existing code might accidentally rely on
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// the current behavior.
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return pickArbitraryLane(workInProgressRootRenderLanes);
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}
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const isTransition = requestCurrentTransition() !== NoTransition;
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if (isTransition) {
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// The algorithm for assigning an update to a lane should be stable for all
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// updates at the same priority within the same event. To do this, the
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// inputs to the algorithm must be the same.
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//
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// The trick we use is to cache the first of each of these inputs within an
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// event. Then reset the cached values once we can be sure the event is
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// over. Our heuristic for that is whenever we enter a concurrent work loop.
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if (currentEventTransitionLane === NoLane) {
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// All transitions within the same event are assigned the same lane.
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currentEventTransitionLane = claimNextTransitionLane();
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}
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return currentEventTransitionLane;
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}
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// Updates originating inside certain React methods, like flushSync, have
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// their priority set by tracking it with a context variable.
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//
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// The opaque type returned by the host config is internally a lane, so we can
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// use that directly.
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// TODO: Move this type conversion to the event priority module.
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const updateLane: Lane = (getCurrentUpdatePriority(): any);
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if (updateLane !== NoLane) {
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return updateLane;
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}
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// This update originated outside React. Ask the host environement for an
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// appropriate priority, based on the type of event.
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//
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// The opaque type returned by the host config is internally a lane, so we can
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// use that directly.
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// TODO: Move this type conversion to the event priority module.
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const eventLane: Lane = (getCurrentEventPriority(): any);
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return eventLane;
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}
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function requestRetryLane(fiber: Fiber) {
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// This is a fork of `requestUpdateLane` designed specifically for Suspense
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// "retries" — a special update that attempts to flip a Suspense boundary
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// from its placeholder state to its primary/resolved state.
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// Special cases
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const mode = fiber.mode;
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if ((mode & ConcurrentMode) === NoMode) {
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return (SyncLane: Lane);
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}
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return claimNextRetryLane();
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}
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export function scheduleUpdateOnFiber(
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fiber: Fiber,
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lane: Lane,
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eventTime: number,
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): FiberRoot | null {
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checkForNestedUpdates();
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warnAboutRenderPhaseUpdatesInDEV(fiber);
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const root = markUpdateLaneFromFiberToRoot(fiber, lane);
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if (root === null) {
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warnAboutUpdateOnUnmountedFiberInDEV(fiber);
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return null;
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}
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if (enableUpdaterTracking) {
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if (isDevToolsPresent) {
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addFiberToLanesMap(root, fiber, lane);
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}
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}
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// Mark that the root has a pending update.
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markRootUpdated(root, lane, eventTime);
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if (enableProfilerTimer && enableProfilerNestedUpdateScheduledHook) {
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if (
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(executionContext & CommitContext) !== NoContext &&
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root === rootCommittingMutationOrLayoutEffects
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) {
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if (fiber.mode & ProfileMode) {
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let current = fiber;
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while (current !== null) {
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if (current.tag === Profiler) {
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const {id, onNestedUpdateScheduled} = current.memoizedProps;
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if (typeof onNestedUpdateScheduled === 'function') {
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onNestedUpdateScheduled(id);
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}
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}
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current = current.return;
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}
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}
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}
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}
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// TODO: Consolidate with `isInterleavedUpdate` check
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if (root === workInProgressRoot) {
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// Received an update to a tree that's in the middle of rendering. Mark
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// that there was an interleaved update work on this root. Unless the
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// `deferRenderPhaseUpdateToNextBatch` flag is off and this is a render
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// phase update. In that case, we don't treat render phase updates as if
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// they were interleaved, for backwards compat reasons.
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if (
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deferRenderPhaseUpdateToNextBatch ||
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(executionContext & RenderContext) === NoContext
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) {
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workInProgressRootUpdatedLanes = mergeLanes(
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workInProgressRootUpdatedLanes,
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lane,
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);
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}
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if (workInProgressRootExitStatus === RootSuspendedWithDelay) {
|
|
// The root already suspended with a delay, which means this render
|
|
// definitely won't finish. Since we have a new update, let's mark it as
|
|
// suspended now, right before marking the incoming update. This has the
|
|
// effect of interrupting the current render and switching to the update.
|
|
// TODO: Make sure this doesn't override pings that happen while we've
|
|
// already started rendering.
|
|
markRootSuspended(root, workInProgressRootRenderLanes);
|
|
}
|
|
}
|
|
|
|
if (lane === SyncLane) {
|
|
if (
|
|
// Check if we're inside unbatchedUpdates
|
|
(executionContext & LegacyUnbatchedContext) !== NoContext &&
|
|
// Check if we're not already rendering
|
|
(executionContext & (RenderContext | CommitContext)) === NoContext
|
|
) {
|
|
// This is a legacy edge case. The initial mount of a ReactDOM.render-ed
|
|
// root inside of batchedUpdates should be synchronous, but layout updates
|
|
// should be deferred until the end of the batch.
|
|
performSyncWorkOnRoot(root);
|
|
} else {
|
|
ensureRootIsScheduled(root, eventTime);
|
|
if (
|
|
executionContext === NoContext &&
|
|
(fiber.mode & ConcurrentMode) === NoMode
|
|
) {
|
|
// Flush the synchronous work now, unless we're already working or inside
|
|
// a batch. This is intentionally inside scheduleUpdateOnFiber instead of
|
|
// scheduleCallbackForFiber to preserve the ability to schedule a callback
|
|
// without immediately flushing it. We only do this for user-initiated
|
|
// updates, to preserve historical behavior of legacy mode.
|
|
resetRenderTimer();
|
|
flushSyncCallbacksOnlyInLegacyMode();
|
|
}
|
|
}
|
|
} else {
|
|
// Schedule other updates after in case the callback is sync.
|
|
ensureRootIsScheduled(root, eventTime);
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
// This is split into a separate function so we can mark a fiber with pending
|
|
// work without treating it as a typical update that originates from an event;
|
|
// e.g. retrying a Suspense boundary isn't an update, but it does schedule work
|
|
// on a fiber.
|
|
function markUpdateLaneFromFiberToRoot(
|
|
sourceFiber: Fiber,
|
|
lane: Lane,
|
|
): FiberRoot | null {
|
|
// Update the source fiber's lanes
|
|
sourceFiber.lanes = mergeLanes(sourceFiber.lanes, lane);
|
|
let alternate = sourceFiber.alternate;
|
|
if (alternate !== null) {
|
|
alternate.lanes = mergeLanes(alternate.lanes, lane);
|
|
}
|
|
if (__DEV__) {
|
|
if (
|
|
alternate === null &&
|
|
(sourceFiber.flags & (Placement | Hydrating)) !== NoFlags
|
|
) {
|
|
warnAboutUpdateOnNotYetMountedFiberInDEV(sourceFiber);
|
|
}
|
|
}
|
|
// Walk the parent path to the root and update the child lanes.
|
|
let node = sourceFiber;
|
|
let parent = sourceFiber.return;
|
|
while (parent !== null) {
|
|
parent.childLanes = mergeLanes(parent.childLanes, lane);
|
|
alternate = parent.alternate;
|
|
if (alternate !== null) {
|
|
alternate.childLanes = mergeLanes(alternate.childLanes, lane);
|
|
} else {
|
|
if (__DEV__) {
|
|
if ((parent.flags & (Placement | Hydrating)) !== NoFlags) {
|
|
warnAboutUpdateOnNotYetMountedFiberInDEV(sourceFiber);
|
|
}
|
|
}
|
|
}
|
|
node = parent;
|
|
parent = parent.return;
|
|
}
|
|
if (node.tag === HostRoot) {
|
|
const root: FiberRoot = node.stateNode;
|
|
return root;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
export function isInterleavedUpdate(fiber: Fiber, lane: Lane) {
|
|
return (
|
|
// TODO: Optimize slightly by comparing to root that fiber belongs to.
|
|
// Requires some refactoring. Not a big deal though since it's rare for
|
|
// concurrent apps to have more than a single root.
|
|
workInProgressRoot !== null &&
|
|
(fiber.mode & ConcurrentMode) !== NoMode &&
|
|
// If this is a render phase update (i.e. UNSAFE_componentWillReceiveProps),
|
|
// then don't treat this as an interleaved update. This pattern is
|
|
// accompanied by a warning but we haven't fully deprecated it yet. We can
|
|
// remove once the deferRenderPhaseUpdateToNextBatch flag is enabled.
|
|
(deferRenderPhaseUpdateToNextBatch ||
|
|
(executionContext & RenderContext) === NoContext)
|
|
);
|
|
}
|
|
|
|
// Use this function to schedule a task for a root. There's only one task per
|
|
// root; if a task was already scheduled, we'll check to make sure the priority
|
|
// of the existing task is the same as the priority of the next level that the
|
|
// root has work on. This function is called on every update, and right before
|
|
// exiting a task.
|
|
function ensureRootIsScheduled(root: FiberRoot, currentTime: number) {
|
|
const existingCallbackNode = root.callbackNode;
|
|
|
|
// Check if any lanes are being starved by other work. If so, mark them as
|
|
// expired so we know to work on those next.
|
|
markStarvedLanesAsExpired(root, currentTime);
|
|
|
|
// Determine the next lanes to work on, and their priority.
|
|
const nextLanes = getNextLanes(
|
|
root,
|
|
root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes,
|
|
);
|
|
|
|
if (nextLanes === NoLanes) {
|
|
// Special case: There's nothing to work on.
|
|
if (existingCallbackNode !== null) {
|
|
cancelCallback(existingCallbackNode);
|
|
}
|
|
root.callbackNode = null;
|
|
root.callbackPriority = NoLane;
|
|
return;
|
|
}
|
|
|
|
// We use the highest priority lane to represent the priority of the callback.
|
|
const newCallbackPriority = getHighestPriorityLane(nextLanes);
|
|
|
|
// Check if there's an existing task. We may be able to reuse it.
|
|
const existingCallbackPriority = root.callbackPriority;
|
|
if (existingCallbackPriority === newCallbackPriority) {
|
|
if (__DEV__) {
|
|
// If we're going to re-use an existing task, it needs to exist.
|
|
// Assume that discrete update microtasks are non-cancellable and null.
|
|
// TODO: Temporary until we confirm this warning is not fired.
|
|
if (
|
|
existingCallbackNode == null &&
|
|
existingCallbackPriority !== SyncLane
|
|
) {
|
|
console.error(
|
|
'Expected scheduled callback to exist. This error is likely caused by a bug in React. Please file an issue.',
|
|
);
|
|
}
|
|
}
|
|
// The priority hasn't changed. We can reuse the existing task. Exit.
|
|
return;
|
|
}
|
|
|
|
if (existingCallbackNode != null) {
|
|
// Cancel the existing callback. We'll schedule a new one below.
|
|
cancelCallback(existingCallbackNode);
|
|
}
|
|
|
|
// Schedule a new callback.
|
|
let newCallbackNode;
|
|
if (newCallbackPriority === SyncLane) {
|
|
// Special case: Sync React callbacks are scheduled on a special
|
|
// internal queue
|
|
if (root.tag === LegacyRoot) {
|
|
scheduleLegacySyncCallback(performSyncWorkOnRoot.bind(null, root));
|
|
} else {
|
|
scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));
|
|
}
|
|
if (supportsMicrotasks) {
|
|
// Flush the queue in a microtask.
|
|
scheduleMicrotask(flushSyncCallbacks);
|
|
} else {
|
|
// Flush the queue in an Immediate task.
|
|
scheduleCallback(ImmediateSchedulerPriority, flushSyncCallbacks);
|
|
}
|
|
newCallbackNode = null;
|
|
} else {
|
|
let schedulerPriorityLevel;
|
|
switch (lanesToEventPriority(nextLanes)) {
|
|
case DiscreteEventPriority:
|
|
schedulerPriorityLevel = ImmediateSchedulerPriority;
|
|
break;
|
|
case ContinuousEventPriority:
|
|
schedulerPriorityLevel = UserBlockingSchedulerPriority;
|
|
break;
|
|
case DefaultEventPriority:
|
|
schedulerPriorityLevel = NormalSchedulerPriority;
|
|
break;
|
|
case IdleEventPriority:
|
|
schedulerPriorityLevel = IdleSchedulerPriority;
|
|
break;
|
|
default:
|
|
schedulerPriorityLevel = NormalSchedulerPriority;
|
|
break;
|
|
}
|
|
newCallbackNode = scheduleCallback(
|
|
schedulerPriorityLevel,
|
|
performConcurrentWorkOnRoot.bind(null, root),
|
|
);
|
|
}
|
|
|
|
root.callbackPriority = newCallbackPriority;
|
|
root.callbackNode = newCallbackNode;
|
|
}
|
|
|
|
// This is the entry point for every concurrent task, i.e. anything that
|
|
// goes through Scheduler.
|
|
function performConcurrentWorkOnRoot(root, didTimeout) {
|
|
if (enableProfilerTimer && enableProfilerNestedUpdatePhase) {
|
|
resetNestedUpdateFlag();
|
|
}
|
|
|
|
// Since we know we're in a React event, we can clear the current
|
|
// event time. The next update will compute a new event time.
|
|
currentEventTime = NoTimestamp;
|
|
currentEventTransitionLane = NoLanes;
|
|
|
|
invariant(
|
|
(executionContext & (RenderContext | CommitContext)) === NoContext,
|
|
'Should not already be working.',
|
|
);
|
|
|
|
// Flush any pending passive effects before deciding which lanes to work on,
|
|
// in case they schedule additional work.
|
|
const originalCallbackNode = root.callbackNode;
|
|
const didFlushPassiveEffects = flushPassiveEffects();
|
|
if (didFlushPassiveEffects) {
|
|
// Something in the passive effect phase may have canceled the current task.
|
|
// Check if the task node for this root was changed.
|
|
if (root.callbackNode !== originalCallbackNode) {
|
|
// The current task was canceled. Exit. We don't need to call
|
|
// `ensureRootIsScheduled` because the check above implies either that
|
|
// there's a new task, or that there's no remaining work on this root.
|
|
return null;
|
|
} else {
|
|
// Current task was not canceled. Continue.
|
|
}
|
|
}
|
|
|
|
// Determine the next expiration time to work on, using the fields stored
|
|
// on the root.
|
|
let lanes = getNextLanes(
|
|
root,
|
|
root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes,
|
|
);
|
|
if (lanes === NoLanes) {
|
|
// Defensive coding. This is never expected to happen.
|
|
return null;
|
|
}
|
|
|
|
// We disable time-slicing in some cases: if the work has been CPU-bound
|
|
// for too long ("expired" work, to prevent starvation), or we're in
|
|
// sync-updates-by-default mode.
|
|
// TODO: We only check `didTimeout` defensively, to account for a Scheduler
|
|
// bug we're still investigating. Once the bug in Scheduler is fixed,
|
|
// we can remove this, since we track expiration ourselves.
|
|
let exitStatus =
|
|
shouldTimeSlice(root, lanes) &&
|
|
(disableSchedulerTimeoutInWorkLoop || !didTimeout)
|
|
? renderRootConcurrent(root, lanes)
|
|
: renderRootSync(root, lanes);
|
|
if (exitStatus !== RootIncomplete) {
|
|
if (exitStatus === RootErrored) {
|
|
executionContext |= RetryAfterError;
|
|
|
|
// If an error occurred during hydration,
|
|
// discard server response and fall back to client side render.
|
|
if (root.hydrate) {
|
|
root.hydrate = false;
|
|
if (__DEV__) {
|
|
errorHydratingContainer(root.containerInfo);
|
|
}
|
|
clearContainer(root.containerInfo);
|
|
}
|
|
|
|
// If something threw an error, try rendering one more time. We'll render
|
|
// synchronously to block concurrent data mutations, and we'll includes
|
|
// all pending updates are included. If it still fails after the second
|
|
// attempt, we'll give up and commit the resulting tree.
|
|
const errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
|
|
if (errorRetryLanes !== NoLanes) {
|
|
lanes = errorRetryLanes;
|
|
exitStatus = renderRootSync(root, errorRetryLanes);
|
|
}
|
|
}
|
|
|
|
if (exitStatus === RootFatalErrored) {
|
|
const fatalError = workInProgressRootFatalError;
|
|
prepareFreshStack(root, NoLanes);
|
|
markRootSuspended(root, lanes);
|
|
ensureRootIsScheduled(root, now());
|
|
throw fatalError;
|
|
}
|
|
|
|
// We now have a consistent tree. The next step is either to commit it,
|
|
// or, if something suspended, wait to commit it after a timeout.
|
|
const finishedWork: Fiber = (root.current.alternate: any);
|
|
root.finishedWork = finishedWork;
|
|
root.finishedLanes = lanes;
|
|
finishConcurrentRender(root, exitStatus, lanes);
|
|
}
|
|
|
|
ensureRootIsScheduled(root, now());
|
|
if (root.callbackNode === originalCallbackNode) {
|
|
// The task node scheduled for this root is the same one that's
|
|
// currently executed. Need to return a continuation.
|
|
return performConcurrentWorkOnRoot.bind(null, root);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function finishConcurrentRender(root, exitStatus, lanes) {
|
|
switch (exitStatus) {
|
|
case RootIncomplete:
|
|
case RootFatalErrored: {
|
|
invariant(false, 'Root did not complete. This is a bug in React.');
|
|
}
|
|
// Flow knows about invariant, so it complains if I add a break
|
|
// statement, but eslint doesn't know about invariant, so it complains
|
|
// if I do. eslint-disable-next-line no-fallthrough
|
|
case RootErrored: {
|
|
// We should have already attempted to retry this tree. If we reached
|
|
// this point, it errored again. Commit it.
|
|
commitRoot(root);
|
|
break;
|
|
}
|
|
case RootSuspended: {
|
|
markRootSuspended(root, lanes);
|
|
|
|
// We have an acceptable loading state. We need to figure out if we
|
|
// should immediately commit it or wait a bit.
|
|
|
|
if (
|
|
includesOnlyRetries(lanes) &&
|
|
// do not delay if we're inside an act() scope
|
|
!shouldForceFlushFallbacksInDEV()
|
|
) {
|
|
// This render only included retries, no updates. Throttle committing
|
|
// retries so that we don't show too many loading states too quickly.
|
|
const msUntilTimeout =
|
|
globalMostRecentFallbackTime + FALLBACK_THROTTLE_MS - now();
|
|
// Don't bother with a very short suspense time.
|
|
if (msUntilTimeout > 10) {
|
|
const nextLanes = getNextLanes(root, NoLanes);
|
|
if (nextLanes !== NoLanes) {
|
|
// There's additional work on this root.
|
|
break;
|
|
}
|
|
const suspendedLanes = root.suspendedLanes;
|
|
if (!isSubsetOfLanes(suspendedLanes, lanes)) {
|
|
// We should prefer to render the fallback of at the last
|
|
// suspended level. Ping the last suspended level to try
|
|
// rendering it again.
|
|
// FIXME: What if the suspended lanes are Idle? Should not restart.
|
|
const eventTime = requestEventTime();
|
|
markRootPinged(root, suspendedLanes, eventTime);
|
|
break;
|
|
}
|
|
|
|
// The render is suspended, it hasn't timed out, and there's no
|
|
// lower priority work to do. Instead of committing the fallback
|
|
// immediately, wait for more data to arrive.
|
|
root.timeoutHandle = scheduleTimeout(
|
|
commitRoot.bind(null, root),
|
|
msUntilTimeout,
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
// The work expired. Commit immediately.
|
|
commitRoot(root);
|
|
break;
|
|
}
|
|
case RootSuspendedWithDelay: {
|
|
markRootSuspended(root, lanes);
|
|
|
|
if (includesOnlyTransitions(lanes)) {
|
|
// This is a transition, so we should exit without committing a
|
|
// placeholder and without scheduling a timeout. Delay indefinitely
|
|
// until we receive more data.
|
|
break;
|
|
}
|
|
|
|
if (!shouldForceFlushFallbacksInDEV()) {
|
|
// This is not a transition, but we did trigger an avoided state.
|
|
// Schedule a placeholder to display after a short delay, using the Just
|
|
// Noticeable Difference.
|
|
// TODO: Is the JND optimization worth the added complexity? If this is
|
|
// the only reason we track the event time, then probably not.
|
|
// Consider removing.
|
|
|
|
const mostRecentEventTime = getMostRecentEventTime(root, lanes);
|
|
const eventTimeMs = mostRecentEventTime;
|
|
const timeElapsedMs = now() - eventTimeMs;
|
|
const msUntilTimeout = jnd(timeElapsedMs) - timeElapsedMs;
|
|
|
|
// Don't bother with a very short suspense time.
|
|
if (msUntilTimeout > 10) {
|
|
// Instead of committing the fallback immediately, wait for more data
|
|
// to arrive.
|
|
root.timeoutHandle = scheduleTimeout(
|
|
commitRoot.bind(null, root),
|
|
msUntilTimeout,
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Commit the placeholder.
|
|
commitRoot(root);
|
|
break;
|
|
}
|
|
case RootCompleted: {
|
|
// The work completed. Ready to commit.
|
|
commitRoot(root);
|
|
break;
|
|
}
|
|
default: {
|
|
invariant(false, 'Unknown root exit status.');
|
|
}
|
|
}
|
|
}
|
|
|
|
function markRootSuspended(root, suspendedLanes) {
|
|
// When suspending, we should always exclude lanes that were pinged or (more
|
|
// rarely, since we try to avoid it) updated during the render phase.
|
|
// TODO: Lol maybe there's a better way to factor this besides this
|
|
// obnoxiously named function :)
|
|
suspendedLanes = removeLanes(suspendedLanes, workInProgressRootPingedLanes);
|
|
suspendedLanes = removeLanes(suspendedLanes, workInProgressRootUpdatedLanes);
|
|
markRootSuspended_dontCallThisOneDirectly(root, suspendedLanes);
|
|
}
|
|
|
|
// This is the entry point for synchronous tasks that don't go
|
|
// through Scheduler
|
|
function performSyncWorkOnRoot(root) {
|
|
if (enableProfilerTimer && enableProfilerNestedUpdatePhase) {
|
|
syncNestedUpdateFlag();
|
|
}
|
|
|
|
invariant(
|
|
(executionContext & (RenderContext | CommitContext)) === NoContext,
|
|
'Should not already be working.',
|
|
);
|
|
|
|
flushPassiveEffects();
|
|
|
|
let lanes = getNextLanes(root, NoLanes);
|
|
if (!includesSomeLane(lanes, SyncLane)) {
|
|
// There's no remaining sync work left.
|
|
ensureRootIsScheduled(root, now());
|
|
return null;
|
|
}
|
|
|
|
let exitStatus = renderRootSync(root, lanes);
|
|
if (root.tag !== LegacyRoot && exitStatus === RootErrored) {
|
|
executionContext |= RetryAfterError;
|
|
|
|
// If an error occurred during hydration,
|
|
// discard server response and fall back to client side render.
|
|
if (root.hydrate) {
|
|
root.hydrate = false;
|
|
if (__DEV__) {
|
|
errorHydratingContainer(root.containerInfo);
|
|
}
|
|
clearContainer(root.containerInfo);
|
|
}
|
|
|
|
// If something threw an error, try rendering one more time. We'll render
|
|
// synchronously to block concurrent data mutations, and we'll includes
|
|
// all pending updates are included. If it still fails after the second
|
|
// attempt, we'll give up and commit the resulting tree.
|
|
const errorRetryLanes = getLanesToRetrySynchronouslyOnError(root);
|
|
if (errorRetryLanes !== NoLanes) {
|
|
lanes = errorRetryLanes;
|
|
exitStatus = renderRootSync(root, lanes);
|
|
}
|
|
}
|
|
|
|
if (exitStatus === RootFatalErrored) {
|
|
const fatalError = workInProgressRootFatalError;
|
|
prepareFreshStack(root, NoLanes);
|
|
markRootSuspended(root, lanes);
|
|
ensureRootIsScheduled(root, now());
|
|
throw fatalError;
|
|
}
|
|
|
|
// We now have a consistent tree. Because this is a sync render, we
|
|
// will commit it even if something suspended.
|
|
const finishedWork: Fiber = (root.current.alternate: any);
|
|
root.finishedWork = finishedWork;
|
|
root.finishedLanes = lanes;
|
|
commitRoot(root);
|
|
|
|
// Before exiting, make sure there's a callback scheduled for the next
|
|
// pending level.
|
|
ensureRootIsScheduled(root, now());
|
|
|
|
return null;
|
|
}
|
|
|
|
export function flushRoot(root: FiberRoot, lanes: Lanes) {
|
|
if (lanes !== NoLanes) {
|
|
markRootEntangled(root, mergeLanes(lanes, SyncLane));
|
|
ensureRootIsScheduled(root, now());
|
|
if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
|
|
resetRenderTimer();
|
|
flushSyncCallbacks();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function getExecutionContext(): ExecutionContext {
|
|
return executionContext;
|
|
}
|
|
|
|
export function flushDiscreteUpdates() {
|
|
// TODO: Should be able to flush inside batchedUpdates, but not inside `act`.
|
|
// However, `act` uses `batchedUpdates`, so there's no way to distinguish
|
|
// those two cases. Need to fix this before exposing flushDiscreteUpdates
|
|
// as a public API.
|
|
if (
|
|
(executionContext & (BatchedContext | RenderContext | CommitContext)) !==
|
|
NoContext
|
|
) {
|
|
if (__DEV__) {
|
|
if ((executionContext & RenderContext) !== NoContext) {
|
|
console.error(
|
|
'unstable_flushDiscreteUpdates: Cannot flush updates when React is ' +
|
|
'already rendering.',
|
|
);
|
|
}
|
|
}
|
|
// We're already rendering, so we can't synchronously flush pending work.
|
|
// This is probably a nested event dispatch triggered by a lifecycle/effect,
|
|
// like `el.focus()`. Exit.
|
|
return;
|
|
}
|
|
flushSyncCallbacks();
|
|
// If the discrete updates scheduled passive effects, flush them now so that
|
|
// they fire before the next serial event.
|
|
flushPassiveEffects();
|
|
}
|
|
|
|
export function deferredUpdates<A>(fn: () => A): A {
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(DefaultEventPriority);
|
|
return fn();
|
|
} finally {
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
}
|
|
}
|
|
|
|
export function batchedUpdates<A, R>(fn: A => R, a: A): R {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= BatchedContext;
|
|
try {
|
|
return fn(a);
|
|
} finally {
|
|
executionContext = prevExecutionContext;
|
|
// If there were legacy sync updates, flush them at the end of the outer
|
|
// most batchedUpdates-like method.
|
|
if (executionContext === NoContext) {
|
|
resetRenderTimer();
|
|
flushSyncCallbacksOnlyInLegacyMode();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function batchedEventUpdates<A, R>(fn: A => R, a: A): R {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= EventContext;
|
|
try {
|
|
return fn(a);
|
|
} finally {
|
|
executionContext = prevExecutionContext;
|
|
// If there were legacy sync updates, flush them at the end of the outer
|
|
// most batchedUpdates-like method.
|
|
if (executionContext === NoContext) {
|
|
resetRenderTimer();
|
|
flushSyncCallbacksOnlyInLegacyMode();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function discreteUpdates<A, B, C, D, R>(
|
|
fn: (A, B, C, D) => R,
|
|
a: A,
|
|
b: B,
|
|
c: C,
|
|
d: D,
|
|
): R {
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(DiscreteEventPriority);
|
|
return fn(a, b, c, d);
|
|
} finally {
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
if (executionContext === NoContext) {
|
|
resetRenderTimer();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function unbatchedUpdates<A, R>(fn: (a: A) => R, a: A): R {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext &= ~BatchedContext;
|
|
executionContext |= LegacyUnbatchedContext;
|
|
try {
|
|
return fn(a);
|
|
} finally {
|
|
executionContext = prevExecutionContext;
|
|
// If there were legacy sync updates, flush them at the end of the outer
|
|
// most batchedUpdates-like method.
|
|
if (executionContext === NoContext) {
|
|
resetRenderTimer();
|
|
// TODO: I think this call is redundant, because we flush inside
|
|
// scheduleUpdateOnFiber when LegacyUnbatchedContext is set.
|
|
flushSyncCallbacksOnlyInLegacyMode();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function flushSync<A, R>(fn: A => R, a: A): R {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= BatchedContext;
|
|
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(DiscreteEventPriority);
|
|
if (fn) {
|
|
return fn(a);
|
|
} else {
|
|
return (undefined: $FlowFixMe);
|
|
}
|
|
} finally {
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
executionContext = prevExecutionContext;
|
|
// Flush the immediate callbacks that were scheduled during this batch.
|
|
// Note that this will happen even if batchedUpdates is higher up
|
|
// the stack.
|
|
if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
|
|
flushSyncCallbacks();
|
|
} else {
|
|
if (__DEV__) {
|
|
console.error(
|
|
'flushSync was called from inside a lifecycle method. React cannot ' +
|
|
'flush when React is already rendering. Consider moving this call to ' +
|
|
'a scheduler task or micro task.',
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
export function flushControlled(fn: () => mixed): void {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= BatchedContext;
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(DiscreteEventPriority);
|
|
fn();
|
|
} finally {
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
|
|
executionContext = prevExecutionContext;
|
|
if (executionContext === NoContext) {
|
|
// Flush the immediate callbacks that were scheduled during this batch
|
|
resetRenderTimer();
|
|
flushSyncCallbacks();
|
|
}
|
|
}
|
|
}
|
|
|
|
export function pushRenderLanes(fiber: Fiber, lanes: Lanes) {
|
|
pushToStack(subtreeRenderLanesCursor, subtreeRenderLanes, fiber);
|
|
subtreeRenderLanes = mergeLanes(subtreeRenderLanes, lanes);
|
|
workInProgressRootIncludedLanes = mergeLanes(
|
|
workInProgressRootIncludedLanes,
|
|
lanes,
|
|
);
|
|
}
|
|
|
|
export function popRenderLanes(fiber: Fiber) {
|
|
subtreeRenderLanes = subtreeRenderLanesCursor.current;
|
|
popFromStack(subtreeRenderLanesCursor, fiber);
|
|
}
|
|
|
|
function prepareFreshStack(root: FiberRoot, lanes: Lanes) {
|
|
root.finishedWork = null;
|
|
root.finishedLanes = NoLanes;
|
|
|
|
const timeoutHandle = root.timeoutHandle;
|
|
if (timeoutHandle !== noTimeout) {
|
|
// The root previous suspended and scheduled a timeout to commit a fallback
|
|
// state. Now that we have additional work, cancel the timeout.
|
|
root.timeoutHandle = noTimeout;
|
|
// $FlowFixMe Complains noTimeout is not a TimeoutID, despite the check above
|
|
cancelTimeout(timeoutHandle);
|
|
}
|
|
|
|
if (workInProgress !== null) {
|
|
let interruptedWork = workInProgress.return;
|
|
while (interruptedWork !== null) {
|
|
unwindInterruptedWork(interruptedWork, workInProgressRootRenderLanes);
|
|
interruptedWork = interruptedWork.return;
|
|
}
|
|
}
|
|
workInProgressRoot = root;
|
|
workInProgress = createWorkInProgress(root.current, null);
|
|
workInProgressRootRenderLanes = subtreeRenderLanes = workInProgressRootIncludedLanes = lanes;
|
|
workInProgressRootExitStatus = RootIncomplete;
|
|
workInProgressRootFatalError = null;
|
|
workInProgressRootSkippedLanes = NoLanes;
|
|
workInProgressRootUpdatedLanes = NoLanes;
|
|
workInProgressRootPingedLanes = NoLanes;
|
|
|
|
enqueueInterleavedUpdates();
|
|
|
|
if (__DEV__) {
|
|
ReactStrictModeWarnings.discardPendingWarnings();
|
|
}
|
|
}
|
|
|
|
function handleError(root, thrownValue): void {
|
|
do {
|
|
let erroredWork = workInProgress;
|
|
try {
|
|
// Reset module-level state that was set during the render phase.
|
|
resetContextDependencies();
|
|
resetHooksAfterThrow();
|
|
resetCurrentDebugFiberInDEV();
|
|
// TODO: I found and added this missing line while investigating a
|
|
// separate issue. Write a regression test using string refs.
|
|
ReactCurrentOwner.current = null;
|
|
|
|
if (erroredWork === null || erroredWork.return === null) {
|
|
// Expected to be working on a non-root fiber. This is a fatal error
|
|
// because there's no ancestor that can handle it; the root is
|
|
// supposed to capture all errors that weren't caught by an error
|
|
// boundary.
|
|
workInProgressRootExitStatus = RootFatalErrored;
|
|
workInProgressRootFatalError = thrownValue;
|
|
// Set `workInProgress` to null. This represents advancing to the next
|
|
// sibling, or the parent if there are no siblings. But since the root
|
|
// has no siblings nor a parent, we set it to null. Usually this is
|
|
// handled by `completeUnitOfWork` or `unwindWork`, but since we're
|
|
// intentionally not calling those, we need set it here.
|
|
// TODO: Consider calling `unwindWork` to pop the contexts.
|
|
workInProgress = null;
|
|
return;
|
|
}
|
|
|
|
if (enableProfilerTimer && erroredWork.mode & ProfileMode) {
|
|
// Record the time spent rendering before an error was thrown. This
|
|
// avoids inaccurate Profiler durations in the case of a
|
|
// suspended render.
|
|
stopProfilerTimerIfRunningAndRecordDelta(erroredWork, true);
|
|
}
|
|
|
|
throwException(
|
|
root,
|
|
erroredWork.return,
|
|
erroredWork,
|
|
thrownValue,
|
|
workInProgressRootRenderLanes,
|
|
);
|
|
completeUnitOfWork(erroredWork);
|
|
} catch (yetAnotherThrownValue) {
|
|
// Something in the return path also threw.
|
|
thrownValue = yetAnotherThrownValue;
|
|
if (workInProgress === erroredWork && erroredWork !== null) {
|
|
// If this boundary has already errored, then we had trouble processing
|
|
// the error. Bubble it to the next boundary.
|
|
erroredWork = erroredWork.return;
|
|
workInProgress = erroredWork;
|
|
} else {
|
|
erroredWork = workInProgress;
|
|
}
|
|
continue;
|
|
}
|
|
// Return to the normal work loop.
|
|
return;
|
|
} while (true);
|
|
}
|
|
|
|
function pushDispatcher() {
|
|
const prevDispatcher = ReactCurrentDispatcher.current;
|
|
ReactCurrentDispatcher.current = ContextOnlyDispatcher;
|
|
if (prevDispatcher === null) {
|
|
// The React isomorphic package does not include a default dispatcher.
|
|
// Instead the first renderer will lazily attach one, in order to give
|
|
// nicer error messages.
|
|
return ContextOnlyDispatcher;
|
|
} else {
|
|
return prevDispatcher;
|
|
}
|
|
}
|
|
|
|
function popDispatcher(prevDispatcher) {
|
|
ReactCurrentDispatcher.current = prevDispatcher;
|
|
}
|
|
|
|
export function markCommitTimeOfFallback() {
|
|
globalMostRecentFallbackTime = now();
|
|
}
|
|
|
|
export function markSkippedUpdateLanes(lane: Lane | Lanes): void {
|
|
workInProgressRootSkippedLanes = mergeLanes(
|
|
lane,
|
|
workInProgressRootSkippedLanes,
|
|
);
|
|
}
|
|
|
|
export function renderDidSuspend(): void {
|
|
if (workInProgressRootExitStatus === RootIncomplete) {
|
|
workInProgressRootExitStatus = RootSuspended;
|
|
}
|
|
}
|
|
|
|
export function renderDidSuspendDelayIfPossible(): void {
|
|
if (
|
|
workInProgressRootExitStatus === RootIncomplete ||
|
|
workInProgressRootExitStatus === RootSuspended
|
|
) {
|
|
workInProgressRootExitStatus = RootSuspendedWithDelay;
|
|
}
|
|
|
|
// Check if there are updates that we skipped tree that might have unblocked
|
|
// this render.
|
|
if (
|
|
workInProgressRoot !== null &&
|
|
(includesNonIdleWork(workInProgressRootSkippedLanes) ||
|
|
includesNonIdleWork(workInProgressRootUpdatedLanes))
|
|
) {
|
|
// Mark the current render as suspended so that we switch to working on
|
|
// the updates that were skipped. Usually we only suspend at the end of
|
|
// the render phase.
|
|
// TODO: We should probably always mark the root as suspended immediately
|
|
// (inside this function), since by suspending at the end of the render
|
|
// phase introduces a potential mistake where we suspend lanes that were
|
|
// pinged or updated while we were rendering.
|
|
markRootSuspended(workInProgressRoot, workInProgressRootRenderLanes);
|
|
}
|
|
}
|
|
|
|
export function renderDidError() {
|
|
if (workInProgressRootExitStatus !== RootCompleted) {
|
|
workInProgressRootExitStatus = RootErrored;
|
|
}
|
|
}
|
|
|
|
// Called during render to determine if anything has suspended.
|
|
// Returns false if we're not sure.
|
|
export function renderHasNotSuspendedYet(): boolean {
|
|
// If something errored or completed, we can't really be sure,
|
|
// so those are false.
|
|
return workInProgressRootExitStatus === RootIncomplete;
|
|
}
|
|
|
|
function renderRootSync(root: FiberRoot, lanes: Lanes) {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= RenderContext;
|
|
const prevDispatcher = pushDispatcher();
|
|
|
|
// If the root or lanes have changed, throw out the existing stack
|
|
// and prepare a fresh one. Otherwise we'll continue where we left off.
|
|
if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
|
|
if (enableUpdaterTracking) {
|
|
if (isDevToolsPresent) {
|
|
const memoizedUpdaters = root.memoizedUpdaters;
|
|
if (memoizedUpdaters.size > 0) {
|
|
restorePendingUpdaters(root, workInProgressRootRenderLanes);
|
|
memoizedUpdaters.clear();
|
|
}
|
|
|
|
// At this point, move Fibers that scheduled the upcoming work from the Map to the Set.
|
|
// If we bailout on this work, we'll move them back (like above).
|
|
// It's important to move them now in case the work spawns more work at the same priority with different updaters.
|
|
// That way we can keep the current update and future updates separate.
|
|
movePendingFibersToMemoized(root, lanes);
|
|
}
|
|
}
|
|
|
|
prepareFreshStack(root, lanes);
|
|
}
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logRenderStarted(lanes);
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markRenderStarted(lanes);
|
|
}
|
|
|
|
do {
|
|
try {
|
|
workLoopSync();
|
|
break;
|
|
} catch (thrownValue) {
|
|
handleError(root, thrownValue);
|
|
}
|
|
} while (true);
|
|
resetContextDependencies();
|
|
|
|
executionContext = prevExecutionContext;
|
|
popDispatcher(prevDispatcher);
|
|
|
|
if (workInProgress !== null) {
|
|
// This is a sync render, so we should have finished the whole tree.
|
|
invariant(
|
|
false,
|
|
'Cannot commit an incomplete root. This error is likely caused by a ' +
|
|
'bug in React. Please file an issue.',
|
|
);
|
|
}
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logRenderStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markRenderStopped();
|
|
}
|
|
|
|
// Set this to null to indicate there's no in-progress render.
|
|
workInProgressRoot = null;
|
|
workInProgressRootRenderLanes = NoLanes;
|
|
|
|
return workInProgressRootExitStatus;
|
|
}
|
|
|
|
// The work loop is an extremely hot path. Tell Closure not to inline it.
|
|
/** @noinline */
|
|
function workLoopSync() {
|
|
// Already timed out, so perform work without checking if we need to yield.
|
|
while (workInProgress !== null) {
|
|
performUnitOfWork(workInProgress);
|
|
}
|
|
}
|
|
|
|
function renderRootConcurrent(root: FiberRoot, lanes: Lanes) {
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= RenderContext;
|
|
const prevDispatcher = pushDispatcher();
|
|
|
|
// If the root or lanes have changed, throw out the existing stack
|
|
// and prepare a fresh one. Otherwise we'll continue where we left off.
|
|
if (workInProgressRoot !== root || workInProgressRootRenderLanes !== lanes) {
|
|
if (enableUpdaterTracking) {
|
|
if (isDevToolsPresent) {
|
|
const memoizedUpdaters = root.memoizedUpdaters;
|
|
if (memoizedUpdaters.size > 0) {
|
|
restorePendingUpdaters(root, workInProgressRootRenderLanes);
|
|
memoizedUpdaters.clear();
|
|
}
|
|
|
|
// At this point, move Fibers that scheduled the upcoming work from the Map to the Set.
|
|
// If we bailout on this work, we'll move them back (like above).
|
|
// It's important to move them now in case the work spawns more work at the same priority with different updaters.
|
|
// That way we can keep the current update and future updates separate.
|
|
movePendingFibersToMemoized(root, lanes);
|
|
}
|
|
}
|
|
|
|
resetRenderTimer();
|
|
prepareFreshStack(root, lanes);
|
|
}
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logRenderStarted(lanes);
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markRenderStarted(lanes);
|
|
}
|
|
|
|
do {
|
|
try {
|
|
workLoopConcurrent();
|
|
break;
|
|
} catch (thrownValue) {
|
|
handleError(root, thrownValue);
|
|
}
|
|
} while (true);
|
|
resetContextDependencies();
|
|
|
|
popDispatcher(prevDispatcher);
|
|
executionContext = prevExecutionContext;
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logRenderStopped();
|
|
}
|
|
}
|
|
|
|
// Check if the tree has completed.
|
|
if (workInProgress !== null) {
|
|
// Still work remaining.
|
|
if (enableSchedulingProfiler) {
|
|
markRenderYielded();
|
|
}
|
|
return RootIncomplete;
|
|
} else {
|
|
// Completed the tree.
|
|
if (enableSchedulingProfiler) {
|
|
markRenderStopped();
|
|
}
|
|
|
|
// Set this to null to indicate there's no in-progress render.
|
|
workInProgressRoot = null;
|
|
workInProgressRootRenderLanes = NoLanes;
|
|
|
|
// Return the final exit status.
|
|
return workInProgressRootExitStatus;
|
|
}
|
|
}
|
|
|
|
/** @noinline */
|
|
function workLoopConcurrent() {
|
|
// Perform work until Scheduler asks us to yield
|
|
while (workInProgress !== null && !shouldYield()) {
|
|
performUnitOfWork(workInProgress);
|
|
}
|
|
}
|
|
|
|
function performUnitOfWork(unitOfWork: Fiber): void {
|
|
// The current, flushed, state of this fiber is the alternate. Ideally
|
|
// nothing should rely on this, but relying on it here means that we don't
|
|
// need an additional field on the work in progress.
|
|
const current = unitOfWork.alternate;
|
|
setCurrentDebugFiberInDEV(unitOfWork);
|
|
|
|
let next;
|
|
if (enableProfilerTimer && (unitOfWork.mode & ProfileMode) !== NoMode) {
|
|
startProfilerTimer(unitOfWork);
|
|
next = beginWork(current, unitOfWork, subtreeRenderLanes);
|
|
stopProfilerTimerIfRunningAndRecordDelta(unitOfWork, true);
|
|
} else {
|
|
next = beginWork(current, unitOfWork, subtreeRenderLanes);
|
|
}
|
|
|
|
resetCurrentDebugFiberInDEV();
|
|
unitOfWork.memoizedProps = unitOfWork.pendingProps;
|
|
if (next === null) {
|
|
// If this doesn't spawn new work, complete the current work.
|
|
completeUnitOfWork(unitOfWork);
|
|
} else {
|
|
workInProgress = next;
|
|
}
|
|
|
|
ReactCurrentOwner.current = null;
|
|
}
|
|
|
|
function completeUnitOfWork(unitOfWork: Fiber): void {
|
|
// Attempt to complete the current unit of work, then move to the next
|
|
// sibling. If there are no more siblings, return to the parent fiber.
|
|
let completedWork = unitOfWork;
|
|
do {
|
|
// The current, flushed, state of this fiber is the alternate. Ideally
|
|
// nothing should rely on this, but relying on it here means that we don't
|
|
// need an additional field on the work in progress.
|
|
const current = completedWork.alternate;
|
|
const returnFiber = completedWork.return;
|
|
|
|
// Check if the work completed or if something threw.
|
|
if ((completedWork.flags & Incomplete) === NoFlags) {
|
|
setCurrentDebugFiberInDEV(completedWork);
|
|
let next;
|
|
if (
|
|
!enableProfilerTimer ||
|
|
(completedWork.mode & ProfileMode) === NoMode
|
|
) {
|
|
next = completeWork(current, completedWork, subtreeRenderLanes);
|
|
} else {
|
|
startProfilerTimer(completedWork);
|
|
next = completeWork(current, completedWork, subtreeRenderLanes);
|
|
// Update render duration assuming we didn't error.
|
|
stopProfilerTimerIfRunningAndRecordDelta(completedWork, false);
|
|
}
|
|
resetCurrentDebugFiberInDEV();
|
|
|
|
if (next !== null) {
|
|
// Completing this fiber spawned new work. Work on that next.
|
|
workInProgress = next;
|
|
return;
|
|
}
|
|
} else {
|
|
// This fiber did not complete because something threw. Pop values off
|
|
// the stack without entering the complete phase. If this is a boundary,
|
|
// capture values if possible.
|
|
const next = unwindWork(completedWork, subtreeRenderLanes);
|
|
|
|
// Because this fiber did not complete, don't reset its expiration time.
|
|
|
|
if (next !== null) {
|
|
// If completing this work spawned new work, do that next. We'll come
|
|
// back here again.
|
|
// Since we're restarting, remove anything that is not a host effect
|
|
// from the effect tag.
|
|
next.flags &= HostEffectMask;
|
|
workInProgress = next;
|
|
return;
|
|
}
|
|
|
|
if (
|
|
enableProfilerTimer &&
|
|
(completedWork.mode & ProfileMode) !== NoMode
|
|
) {
|
|
// Record the render duration for the fiber that errored.
|
|
stopProfilerTimerIfRunningAndRecordDelta(completedWork, false);
|
|
|
|
// Include the time spent working on failed children before continuing.
|
|
let actualDuration = completedWork.actualDuration;
|
|
let child = completedWork.child;
|
|
while (child !== null) {
|
|
actualDuration += child.actualDuration;
|
|
child = child.sibling;
|
|
}
|
|
completedWork.actualDuration = actualDuration;
|
|
}
|
|
|
|
if (returnFiber !== null) {
|
|
// Mark the parent fiber as incomplete and clear its subtree flags.
|
|
returnFiber.flags |= Incomplete;
|
|
returnFiber.subtreeFlags = NoFlags;
|
|
returnFiber.deletions = null;
|
|
}
|
|
}
|
|
|
|
const siblingFiber = completedWork.sibling;
|
|
if (siblingFiber !== null) {
|
|
// If there is more work to do in this returnFiber, do that next.
|
|
workInProgress = siblingFiber;
|
|
return;
|
|
}
|
|
// Otherwise, return to the parent
|
|
completedWork = returnFiber;
|
|
// Update the next thing we're working on in case something throws.
|
|
workInProgress = completedWork;
|
|
} while (completedWork !== null);
|
|
|
|
// We've reached the root.
|
|
if (workInProgressRootExitStatus === RootIncomplete) {
|
|
workInProgressRootExitStatus = RootCompleted;
|
|
}
|
|
}
|
|
|
|
function commitRoot(root) {
|
|
// TODO: This no longer makes any sense. We already wrap the mutation and
|
|
// layout phases. Should be able to remove.
|
|
const previousUpdateLanePriority = getCurrentUpdatePriority();
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(DiscreteEventPriority);
|
|
commitRootImpl(root, previousUpdateLanePriority);
|
|
} finally {
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
setCurrentUpdatePriority(previousUpdateLanePriority);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
function commitRootImpl(root, renderPriorityLevel) {
|
|
do {
|
|
// `flushPassiveEffects` will call `flushSyncUpdateQueue` at the end, which
|
|
// means `flushPassiveEffects` will sometimes result in additional
|
|
// passive effects. So we need to keep flushing in a loop until there are
|
|
// no more pending effects.
|
|
// TODO: Might be better if `flushPassiveEffects` did not automatically
|
|
// flush synchronous work at the end, to avoid factoring hazards like this.
|
|
flushPassiveEffects();
|
|
} while (rootWithPendingPassiveEffects !== null);
|
|
flushRenderPhaseStrictModeWarningsInDEV();
|
|
|
|
invariant(
|
|
(executionContext & (RenderContext | CommitContext)) === NoContext,
|
|
'Should not already be working.',
|
|
);
|
|
|
|
const finishedWork = root.finishedWork;
|
|
const lanes = root.finishedLanes;
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logCommitStarted(lanes);
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markCommitStarted(lanes);
|
|
}
|
|
|
|
if (finishedWork === null) {
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logCommitStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markCommitStopped();
|
|
}
|
|
|
|
return null;
|
|
} else {
|
|
if (__DEV__) {
|
|
if (lanes === NoLanes) {
|
|
console.error(
|
|
'root.finishedLanes should not be empty during a commit. This is a ' +
|
|
'bug in React.',
|
|
);
|
|
}
|
|
}
|
|
}
|
|
root.finishedWork = null;
|
|
root.finishedLanes = NoLanes;
|
|
|
|
invariant(
|
|
finishedWork !== root.current,
|
|
'Cannot commit the same tree as before. This error is likely caused by ' +
|
|
'a bug in React. Please file an issue.',
|
|
);
|
|
|
|
// commitRoot never returns a continuation; it always finishes synchronously.
|
|
// So we can clear these now to allow a new callback to be scheduled.
|
|
root.callbackNode = null;
|
|
root.callbackPriority = NoLane;
|
|
|
|
// Update the first and last pending times on this root. The new first
|
|
// pending time is whatever is left on the root fiber.
|
|
let remainingLanes = mergeLanes(finishedWork.lanes, finishedWork.childLanes);
|
|
markRootFinished(root, remainingLanes);
|
|
|
|
if (root === workInProgressRoot) {
|
|
// We can reset these now that they are finished.
|
|
workInProgressRoot = null;
|
|
workInProgress = null;
|
|
workInProgressRootRenderLanes = NoLanes;
|
|
} else {
|
|
// This indicates that the last root we worked on is not the same one that
|
|
// we're committing now. This most commonly happens when a suspended root
|
|
// times out.
|
|
}
|
|
|
|
// If there are pending passive effects, schedule a callback to process them.
|
|
// Do this as early as possible, so it is queued before anything else that
|
|
// might get scheduled in the commit phase. (See #16714.)
|
|
// TODO: Delete all other places that schedule the passive effect callback
|
|
// They're redundant.
|
|
if (
|
|
(finishedWork.subtreeFlags & PassiveMask) !== NoFlags ||
|
|
(finishedWork.flags & PassiveMask) !== NoFlags
|
|
) {
|
|
if (!rootDoesHavePassiveEffects) {
|
|
rootDoesHavePassiveEffects = true;
|
|
scheduleCallback(NormalSchedulerPriority, () => {
|
|
flushPassiveEffects();
|
|
return null;
|
|
});
|
|
}
|
|
}
|
|
|
|
// Check if there are any effects in the whole tree.
|
|
// TODO: This is left over from the effect list implementation, where we had
|
|
// to check for the existence of `firstEffect` to satsify Flow. I think the
|
|
// only other reason this optimization exists is because it affects profiling.
|
|
// Reconsider whether this is necessary.
|
|
const subtreeHasEffects =
|
|
(finishedWork.subtreeFlags &
|
|
(BeforeMutationMask | MutationMask | LayoutMask | PassiveMask)) !==
|
|
NoFlags;
|
|
const rootHasEffect =
|
|
(finishedWork.flags &
|
|
(BeforeMutationMask | MutationMask | LayoutMask | PassiveMask)) !==
|
|
NoFlags;
|
|
|
|
if (subtreeHasEffects || rootHasEffect) {
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
setCurrentUpdatePriority(DiscreteEventPriority);
|
|
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= CommitContext;
|
|
|
|
// Reset this to null before calling lifecycles
|
|
ReactCurrentOwner.current = null;
|
|
|
|
// The commit phase is broken into several sub-phases. We do a separate pass
|
|
// of the effect list for each phase: all mutation effects come before all
|
|
// layout effects, and so on.
|
|
|
|
// The first phase a "before mutation" phase. We use this phase to read the
|
|
// state of the host tree right before we mutate it. This is where
|
|
// getSnapshotBeforeUpdate is called.
|
|
const shouldFireAfterActiveInstanceBlur = commitBeforeMutationEffects(
|
|
root,
|
|
finishedWork,
|
|
);
|
|
|
|
if (enableProfilerTimer) {
|
|
// Mark the current commit time to be shared by all Profilers in this
|
|
// batch. This enables them to be grouped later.
|
|
recordCommitTime();
|
|
}
|
|
|
|
if (enableProfilerTimer && enableProfilerNestedUpdateScheduledHook) {
|
|
// Track the root here, rather than in commitLayoutEffects(), because of ref setters.
|
|
// Updates scheduled during ref detachment should also be flagged.
|
|
rootCommittingMutationOrLayoutEffects = root;
|
|
}
|
|
|
|
// The next phase is the mutation phase, where we mutate the host tree.
|
|
commitMutationEffects(root, finishedWork, lanes);
|
|
|
|
if (shouldFireAfterActiveInstanceBlur) {
|
|
afterActiveInstanceBlur();
|
|
}
|
|
resetAfterCommit(root.containerInfo);
|
|
|
|
// The work-in-progress tree is now the current tree. This must come after
|
|
// the mutation phase, so that the previous tree is still current during
|
|
// componentWillUnmount, but before the layout phase, so that the finished
|
|
// work is current during componentDidMount/Update.
|
|
root.current = finishedWork;
|
|
|
|
// The next phase is the layout phase, where we call effects that read
|
|
// the host tree after it's been mutated. The idiomatic use case for this is
|
|
// layout, but class component lifecycles also fire here for legacy reasons.
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logLayoutEffectsStarted(lanes);
|
|
}
|
|
}
|
|
if (enableSchedulingProfiler) {
|
|
markLayoutEffectsStarted(lanes);
|
|
}
|
|
commitLayoutEffects(finishedWork, root, lanes);
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logLayoutEffectsStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markLayoutEffectsStopped();
|
|
}
|
|
|
|
if (enableProfilerTimer && enableProfilerNestedUpdateScheduledHook) {
|
|
rootCommittingMutationOrLayoutEffects = null;
|
|
}
|
|
|
|
// Tell Scheduler to yield at the end of the frame, so the browser has an
|
|
// opportunity to paint.
|
|
requestPaint();
|
|
|
|
executionContext = prevExecutionContext;
|
|
|
|
// Reset the priority to the previous non-sync value.
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
} else {
|
|
// No effects.
|
|
root.current = finishedWork;
|
|
// Measure these anyway so the flamegraph explicitly shows that there were
|
|
// no effects.
|
|
// TODO: Maybe there's a better way to report this.
|
|
if (enableProfilerTimer) {
|
|
recordCommitTime();
|
|
}
|
|
}
|
|
|
|
const rootDidHavePassiveEffects = rootDoesHavePassiveEffects;
|
|
|
|
if (rootDoesHavePassiveEffects) {
|
|
// This commit has passive effects. Stash a reference to them. But don't
|
|
// schedule a callback until after flushing layout work.
|
|
rootDoesHavePassiveEffects = false;
|
|
rootWithPendingPassiveEffects = root;
|
|
pendingPassiveEffectsLanes = lanes;
|
|
}
|
|
|
|
// Read this again, since an effect might have updated it
|
|
remainingLanes = root.pendingLanes;
|
|
|
|
// Check if there's remaining work on this root
|
|
if (remainingLanes === NoLanes) {
|
|
// If there's no remaining work, we can clear the set of already failed
|
|
// error boundaries.
|
|
legacyErrorBoundariesThatAlreadyFailed = null;
|
|
}
|
|
|
|
if (__DEV__ && enableStrictEffects) {
|
|
if (!rootDidHavePassiveEffects) {
|
|
commitDoubleInvokeEffectsInDEV(root.current, false);
|
|
}
|
|
}
|
|
|
|
if (includesSomeLane(remainingLanes, (SyncLane: Lane))) {
|
|
if (enableProfilerTimer && enableProfilerNestedUpdatePhase) {
|
|
markNestedUpdateScheduled();
|
|
}
|
|
|
|
// Count the number of times the root synchronously re-renders without
|
|
// finishing. If there are too many, it indicates an infinite update loop.
|
|
if (root === rootWithNestedUpdates) {
|
|
nestedUpdateCount++;
|
|
} else {
|
|
nestedUpdateCount = 0;
|
|
rootWithNestedUpdates = root;
|
|
}
|
|
} else {
|
|
nestedUpdateCount = 0;
|
|
}
|
|
|
|
onCommitRootDevTools(finishedWork.stateNode, renderPriorityLevel);
|
|
|
|
if (enableUpdaterTracking) {
|
|
if (isDevToolsPresent) {
|
|
root.memoizedUpdaters.clear();
|
|
}
|
|
}
|
|
|
|
if (__DEV__) {
|
|
onCommitRootTestSelector();
|
|
}
|
|
|
|
// Always call this before exiting `commitRoot`, to ensure that any
|
|
// additional work on this root is scheduled.
|
|
ensureRootIsScheduled(root, now());
|
|
|
|
if (hasUncaughtError) {
|
|
hasUncaughtError = false;
|
|
const error = firstUncaughtError;
|
|
firstUncaughtError = null;
|
|
throw error;
|
|
}
|
|
|
|
if ((executionContext & LegacyUnbatchedContext) !== NoContext) {
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logCommitStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markCommitStopped();
|
|
}
|
|
|
|
// This is a legacy edge case. We just committed the initial mount of
|
|
// a ReactDOM.render-ed root inside of batchedUpdates. The commit fired
|
|
// synchronously, but layout updates should be deferred until the end
|
|
// of the batch.
|
|
return null;
|
|
}
|
|
|
|
// If the passive effects are the result of a discrete render, flush them
|
|
// synchronously at the end of the current task so that the result is
|
|
// immediately observable. Otherwise, we assume that they are not
|
|
// order-dependent and do not need to be observed by external systems, so we
|
|
// can wait until after paint.
|
|
// TODO: We can optimize this by not scheduling the callback earlier. Since we
|
|
// currently schedule the callback in multiple places, will wait until those
|
|
// are consolidated.
|
|
if (
|
|
includesSomeLane(pendingPassiveEffectsLanes, SyncLane) &&
|
|
root.tag !== LegacyRoot
|
|
) {
|
|
flushPassiveEffects();
|
|
}
|
|
|
|
// If layout work was scheduled, flush it now.
|
|
flushSyncCallbacks();
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logCommitStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markCommitStopped();
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
export function flushPassiveEffects(): boolean {
|
|
// Returns whether passive effects were flushed.
|
|
// TODO: Combine this check with the one in flushPassiveEFfectsImpl. We should
|
|
// probably just combine the two functions. I believe they were only separate
|
|
// in the first place because we used to wrap it with
|
|
// `Scheduler.runWithPriority`, which accepts a function. But now we track the
|
|
// priority within React itself, so we can mutate the variable directly.
|
|
if (rootWithPendingPassiveEffects !== null) {
|
|
const renderPriority = lanesToEventPriority(pendingPassiveEffectsLanes);
|
|
const priority = lowerEventPriority(DefaultEventPriority, renderPriority);
|
|
const prevTransition = ReactCurrentBatchConfig.transition;
|
|
const previousPriority = getCurrentUpdatePriority();
|
|
try {
|
|
ReactCurrentBatchConfig.transition = 0;
|
|
setCurrentUpdatePriority(priority);
|
|
return flushPassiveEffectsImpl();
|
|
} finally {
|
|
setCurrentUpdatePriority(previousPriority);
|
|
ReactCurrentBatchConfig.transition = prevTransition;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
export function enqueuePendingPassiveProfilerEffect(fiber: Fiber): void {
|
|
if (enableProfilerTimer && enableProfilerCommitHooks) {
|
|
pendingPassiveProfilerEffects.push(fiber);
|
|
if (!rootDoesHavePassiveEffects) {
|
|
rootDoesHavePassiveEffects = true;
|
|
scheduleCallback(NormalSchedulerPriority, () => {
|
|
flushPassiveEffects();
|
|
return null;
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
function flushPassiveEffectsImpl() {
|
|
if (rootWithPendingPassiveEffects === null) {
|
|
return false;
|
|
}
|
|
|
|
const root = rootWithPendingPassiveEffects;
|
|
const lanes = pendingPassiveEffectsLanes;
|
|
rootWithPendingPassiveEffects = null;
|
|
// TODO: This is sometimes out of sync with rootWithPendingPassiveEffects.
|
|
// Figure out why and fix it. It's not causing any known issues (probably
|
|
// because it's only used for profiling), but it's a refactor hazard.
|
|
pendingPassiveEffectsLanes = NoLanes;
|
|
|
|
invariant(
|
|
(executionContext & (RenderContext | CommitContext)) === NoContext,
|
|
'Cannot flush passive effects while already rendering.',
|
|
);
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logPassiveEffectsStarted(lanes);
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markPassiveEffectsStarted(lanes);
|
|
}
|
|
|
|
if (__DEV__) {
|
|
isFlushingPassiveEffects = true;
|
|
}
|
|
|
|
const prevExecutionContext = executionContext;
|
|
executionContext |= CommitContext;
|
|
|
|
commitPassiveUnmountEffects(root.current);
|
|
commitPassiveMountEffects(root, root.current);
|
|
|
|
// TODO: Move to commitPassiveMountEffects
|
|
if (enableProfilerTimer && enableProfilerCommitHooks) {
|
|
const profilerEffects = pendingPassiveProfilerEffects;
|
|
pendingPassiveProfilerEffects = [];
|
|
for (let i = 0; i < profilerEffects.length; i++) {
|
|
const fiber = ((profilerEffects[i]: any): Fiber);
|
|
commitPassiveEffectDurations(root, fiber);
|
|
}
|
|
}
|
|
|
|
if (__DEV__) {
|
|
isFlushingPassiveEffects = false;
|
|
}
|
|
|
|
if (__DEV__) {
|
|
if (enableDebugTracing) {
|
|
logPassiveEffectsStopped();
|
|
}
|
|
}
|
|
|
|
if (enableSchedulingProfiler) {
|
|
markPassiveEffectsStopped();
|
|
}
|
|
|
|
if (__DEV__ && enableStrictEffects) {
|
|
commitDoubleInvokeEffectsInDEV(root.current, true);
|
|
}
|
|
|
|
executionContext = prevExecutionContext;
|
|
|
|
flushSyncCallbacks();
|
|
|
|
// If additional passive effects were scheduled, increment a counter. If this
|
|
// exceeds the limit, we'll fire a warning.
|
|
nestedPassiveUpdateCount =
|
|
rootWithPendingPassiveEffects === null ? 0 : nestedPassiveUpdateCount + 1;
|
|
|
|
// TODO: Move to commitPassiveMountEffects
|
|
onPostCommitRootDevTools(root);
|
|
if (enableProfilerTimer && enableProfilerCommitHooks) {
|
|
const stateNode = root.current.stateNode;
|
|
stateNode.effectDuration = 0;
|
|
stateNode.passiveEffectDuration = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
export function isAlreadyFailedLegacyErrorBoundary(instance: mixed): boolean {
|
|
return (
|
|
legacyErrorBoundariesThatAlreadyFailed !== null &&
|
|
legacyErrorBoundariesThatAlreadyFailed.has(instance)
|
|
);
|
|
}
|
|
|
|
export function markLegacyErrorBoundaryAsFailed(instance: mixed) {
|
|
if (legacyErrorBoundariesThatAlreadyFailed === null) {
|
|
legacyErrorBoundariesThatAlreadyFailed = new Set([instance]);
|
|
} else {
|
|
legacyErrorBoundariesThatAlreadyFailed.add(instance);
|
|
}
|
|
}
|
|
|
|
function prepareToThrowUncaughtError(error: mixed) {
|
|
if (!hasUncaughtError) {
|
|
hasUncaughtError = true;
|
|
firstUncaughtError = error;
|
|
}
|
|
}
|
|
export const onUncaughtError = prepareToThrowUncaughtError;
|
|
|
|
function captureCommitPhaseErrorOnRoot(
|
|
rootFiber: Fiber,
|
|
sourceFiber: Fiber,
|
|
error: mixed,
|
|
) {
|
|
const errorInfo = createCapturedValue(error, sourceFiber);
|
|
const update = createRootErrorUpdate(rootFiber, errorInfo, (SyncLane: Lane));
|
|
enqueueUpdate(rootFiber, update, (SyncLane: Lane));
|
|
const eventTime = requestEventTime();
|
|
const root = markUpdateLaneFromFiberToRoot(rootFiber, (SyncLane: Lane));
|
|
if (root !== null) {
|
|
markRootUpdated(root, SyncLane, eventTime);
|
|
ensureRootIsScheduled(root, eventTime);
|
|
}
|
|
}
|
|
|
|
export function captureCommitPhaseError(
|
|
sourceFiber: Fiber,
|
|
nearestMountedAncestor: Fiber | null,
|
|
error: mixed,
|
|
) {
|
|
if (sourceFiber.tag === HostRoot) {
|
|
// Error was thrown at the root. There is no parent, so the root
|
|
// itself should capture it.
|
|
captureCommitPhaseErrorOnRoot(sourceFiber, sourceFiber, error);
|
|
return;
|
|
}
|
|
|
|
let fiber = null;
|
|
if (skipUnmountedBoundaries) {
|
|
fiber = nearestMountedAncestor;
|
|
} else {
|
|
fiber = sourceFiber.return;
|
|
}
|
|
|
|
while (fiber !== null) {
|
|
if (fiber.tag === HostRoot) {
|
|
captureCommitPhaseErrorOnRoot(fiber, sourceFiber, error);
|
|
return;
|
|
} else if (fiber.tag === ClassComponent) {
|
|
const ctor = fiber.type;
|
|
const instance = fiber.stateNode;
|
|
if (
|
|
typeof ctor.getDerivedStateFromError === 'function' ||
|
|
(typeof instance.componentDidCatch === 'function' &&
|
|
!isAlreadyFailedLegacyErrorBoundary(instance))
|
|
) {
|
|
const errorInfo = createCapturedValue(error, sourceFiber);
|
|
const update = createClassErrorUpdate(
|
|
fiber,
|
|
errorInfo,
|
|
(SyncLane: Lane),
|
|
);
|
|
enqueueUpdate(fiber, update, (SyncLane: Lane));
|
|
const eventTime = requestEventTime();
|
|
const root = markUpdateLaneFromFiberToRoot(fiber, (SyncLane: Lane));
|
|
if (root !== null) {
|
|
markRootUpdated(root, SyncLane, eventTime);
|
|
ensureRootIsScheduled(root, eventTime);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
fiber = fiber.return;
|
|
}
|
|
|
|
if (__DEV__) {
|
|
// TODO: Until we re-land skipUnmountedBoundaries (see #20147), this warning
|
|
// will fire for errors that are thrown by destroy functions inside deleted
|
|
// trees. What it should instead do is propagate the error to the parent of
|
|
// the deleted tree. In the meantime, do not add this warning to the
|
|
// allowlist; this is only for our internal use.
|
|
console.error(
|
|
'Internal React error: Attempted to capture a commit phase error ' +
|
|
'inside a detached tree. This indicates a bug in React. Likely ' +
|
|
'causes include deleting the same fiber more than once, committing an ' +
|
|
'already-finished tree, or an inconsistent return pointer.\n\n' +
|
|
'Error message:\n\n%s',
|
|
error,
|
|
);
|
|
}
|
|
}
|
|
|
|
export function pingSuspendedRoot(
|
|
root: FiberRoot,
|
|
wakeable: Wakeable,
|
|
pingedLanes: Lanes,
|
|
) {
|
|
const pingCache = root.pingCache;
|
|
if (pingCache !== null) {
|
|
// The wakeable resolved, so we no longer need to memoize, because it will
|
|
// never be thrown again.
|
|
pingCache.delete(wakeable);
|
|
}
|
|
|
|
const eventTime = requestEventTime();
|
|
markRootPinged(root, pingedLanes, eventTime);
|
|
|
|
if (
|
|
workInProgressRoot === root &&
|
|
isSubsetOfLanes(workInProgressRootRenderLanes, pingedLanes)
|
|
) {
|
|
// Received a ping at the same priority level at which we're currently
|
|
// rendering. We might want to restart this render. This should mirror
|
|
// the logic of whether or not a root suspends once it completes.
|
|
|
|
// TODO: If we're rendering sync either due to Sync, Batched or expired,
|
|
// we should probably never restart.
|
|
|
|
// If we're suspended with delay, or if it's a retry, we'll always suspend
|
|
// so we can always restart.
|
|
if (
|
|
workInProgressRootExitStatus === RootSuspendedWithDelay ||
|
|
(workInProgressRootExitStatus === RootSuspended &&
|
|
includesOnlyRetries(workInProgressRootRenderLanes) &&
|
|
now() - globalMostRecentFallbackTime < FALLBACK_THROTTLE_MS)
|
|
) {
|
|
// Restart from the root.
|
|
prepareFreshStack(root, NoLanes);
|
|
} else {
|
|
// Even though we can't restart right now, we might get an
|
|
// opportunity later. So we mark this render as having a ping.
|
|
workInProgressRootPingedLanes = mergeLanes(
|
|
workInProgressRootPingedLanes,
|
|
pingedLanes,
|
|
);
|
|
}
|
|
}
|
|
|
|
ensureRootIsScheduled(root, eventTime);
|
|
}
|
|
|
|
function retryTimedOutBoundary(boundaryFiber: Fiber, retryLane: Lane) {
|
|
// The boundary fiber (a Suspense component or SuspenseList component)
|
|
// previously was rendered in its fallback state. One of the promises that
|
|
// suspended it has resolved, which means at least part of the tree was
|
|
// likely unblocked. Try rendering again, at a new expiration time.
|
|
if (retryLane === NoLane) {
|
|
// TODO: Assign this to `suspenseState.retryLane`? to avoid
|
|
// unnecessary entanglement?
|
|
retryLane = requestRetryLane(boundaryFiber);
|
|
}
|
|
// TODO: Special case idle priority?
|
|
const eventTime = requestEventTime();
|
|
const root = markUpdateLaneFromFiberToRoot(boundaryFiber, retryLane);
|
|
if (root !== null) {
|
|
markRootUpdated(root, retryLane, eventTime);
|
|
ensureRootIsScheduled(root, eventTime);
|
|
}
|
|
}
|
|
|
|
export function retryDehydratedSuspenseBoundary(boundaryFiber: Fiber) {
|
|
const suspenseState: null | SuspenseState = boundaryFiber.memoizedState;
|
|
let retryLane = NoLane;
|
|
if (suspenseState !== null) {
|
|
retryLane = suspenseState.retryLane;
|
|
}
|
|
retryTimedOutBoundary(boundaryFiber, retryLane);
|
|
}
|
|
|
|
export function resolveRetryWakeable(boundaryFiber: Fiber, wakeable: Wakeable) {
|
|
let retryLane = NoLane; // Default
|
|
let retryCache: WeakSet<Wakeable> | Set<Wakeable> | null;
|
|
if (enableSuspenseServerRenderer) {
|
|
switch (boundaryFiber.tag) {
|
|
case SuspenseComponent:
|
|
retryCache = boundaryFiber.stateNode;
|
|
const suspenseState: null | SuspenseState = boundaryFiber.memoizedState;
|
|
if (suspenseState !== null) {
|
|
retryLane = suspenseState.retryLane;
|
|
}
|
|
break;
|
|
case SuspenseListComponent:
|
|
retryCache = boundaryFiber.stateNode;
|
|
break;
|
|
default:
|
|
invariant(
|
|
false,
|
|
'Pinged unknown suspense boundary type. ' +
|
|
'This is probably a bug in React.',
|
|
);
|
|
}
|
|
} else {
|
|
retryCache = boundaryFiber.stateNode;
|
|
}
|
|
|
|
if (retryCache !== null) {
|
|
// The wakeable resolved, so we no longer need to memoize, because it will
|
|
// never be thrown again.
|
|
retryCache.delete(wakeable);
|
|
}
|
|
|
|
retryTimedOutBoundary(boundaryFiber, retryLane);
|
|
}
|
|
|
|
// Computes the next Just Noticeable Difference (JND) boundary.
|
|
// The theory is that a person can't tell the difference between small differences in time.
|
|
// Therefore, if we wait a bit longer than necessary that won't translate to a noticeable
|
|
// difference in the experience. However, waiting for longer might mean that we can avoid
|
|
// showing an intermediate loading state. The longer we have already waited, the harder it
|
|
// is to tell small differences in time. Therefore, the longer we've already waited,
|
|
// the longer we can wait additionally. At some point we have to give up though.
|
|
// We pick a train model where the next boundary commits at a consistent schedule.
|
|
// These particular numbers are vague estimates. We expect to adjust them based on research.
|
|
function jnd(timeElapsed: number) {
|
|
return timeElapsed < 120
|
|
? 120
|
|
: timeElapsed < 480
|
|
? 480
|
|
: timeElapsed < 1080
|
|
? 1080
|
|
: timeElapsed < 1920
|
|
? 1920
|
|
: timeElapsed < 3000
|
|
? 3000
|
|
: timeElapsed < 4320
|
|
? 4320
|
|
: ceil(timeElapsed / 1960) * 1960;
|
|
}
|
|
|
|
function checkForNestedUpdates() {
|
|
if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
|
|
nestedUpdateCount = 0;
|
|
rootWithNestedUpdates = null;
|
|
invariant(
|
|
false,
|
|
'Maximum update depth exceeded. This can happen when a component ' +
|
|
'repeatedly calls setState inside componentWillUpdate or ' +
|
|
'componentDidUpdate. React limits the number of nested updates to ' +
|
|
'prevent infinite loops.',
|
|
);
|
|
}
|
|
|
|
if (__DEV__) {
|
|
if (nestedPassiveUpdateCount > NESTED_PASSIVE_UPDATE_LIMIT) {
|
|
nestedPassiveUpdateCount = 0;
|
|
console.error(
|
|
'Maximum update depth exceeded. This can happen when a component ' +
|
|
"calls setState inside useEffect, but useEffect either doesn't " +
|
|
'have a dependency array, or one of the dependencies changes on ' +
|
|
'every render.',
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
function flushRenderPhaseStrictModeWarningsInDEV() {
|
|
if (__DEV__) {
|
|
ReactStrictModeWarnings.flushLegacyContextWarning();
|
|
|
|
if (warnAboutDeprecatedLifecycles) {
|
|
ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings();
|
|
}
|
|
}
|
|
}
|
|
|
|
function commitDoubleInvokeEffectsInDEV(
|
|
fiber: Fiber,
|
|
hasPassiveEffects: boolean,
|
|
) {
|
|
if (__DEV__ && enableStrictEffects) {
|
|
// TODO (StrictEffects) Should we set a marker on the root if it contains strict effects
|
|
// so we don't traverse unnecessarily? similar to subtreeFlags but just at the root level.
|
|
// Maybe not a big deal since this is DEV only behavior.
|
|
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
invokeEffectsInDev(fiber, MountLayoutDev, invokeLayoutEffectUnmountInDEV);
|
|
if (hasPassiveEffects) {
|
|
invokeEffectsInDev(
|
|
fiber,
|
|
MountPassiveDev,
|
|
invokePassiveEffectUnmountInDEV,
|
|
);
|
|
}
|
|
|
|
invokeEffectsInDev(fiber, MountLayoutDev, invokeLayoutEffectMountInDEV);
|
|
if (hasPassiveEffects) {
|
|
invokeEffectsInDev(fiber, MountPassiveDev, invokePassiveEffectMountInDEV);
|
|
}
|
|
resetCurrentDebugFiberInDEV();
|
|
}
|
|
}
|
|
|
|
function invokeEffectsInDev(
|
|
firstChild: Fiber,
|
|
fiberFlags: Flags,
|
|
invokeEffectFn: (fiber: Fiber) => void,
|
|
): void {
|
|
if (__DEV__ && enableStrictEffects) {
|
|
// We don't need to re-check StrictEffectsMode here.
|
|
// This function is only called if that check has already passed.
|
|
|
|
let current = firstChild;
|
|
let subtreeRoot = null;
|
|
while (current !== null) {
|
|
const primarySubtreeFlag = current.subtreeFlags & fiberFlags;
|
|
if (
|
|
current !== subtreeRoot &&
|
|
current.child !== null &&
|
|
primarySubtreeFlag !== NoFlags
|
|
) {
|
|
current = current.child;
|
|
} else {
|
|
if ((current.flags & fiberFlags) !== NoFlags) {
|
|
invokeEffectFn(current);
|
|
}
|
|
|
|
if (current.sibling !== null) {
|
|
current = current.sibling;
|
|
} else {
|
|
current = subtreeRoot = current.return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let didWarnStateUpdateForNotYetMountedComponent: Set<string> | null = null;
|
|
function warnAboutUpdateOnNotYetMountedFiberInDEV(fiber) {
|
|
if (__DEV__) {
|
|
if ((executionContext & RenderContext) !== NoContext) {
|
|
// We let the other warning about render phase updates deal with this one.
|
|
return;
|
|
}
|
|
|
|
if (!(fiber.mode & ConcurrentMode)) {
|
|
return;
|
|
}
|
|
|
|
const tag = fiber.tag;
|
|
if (
|
|
tag !== IndeterminateComponent &&
|
|
tag !== HostRoot &&
|
|
tag !== ClassComponent &&
|
|
tag !== FunctionComponent &&
|
|
tag !== ForwardRef &&
|
|
tag !== MemoComponent &&
|
|
tag !== SimpleMemoComponent
|
|
) {
|
|
// Only warn for user-defined components, not internal ones like Suspense.
|
|
return;
|
|
}
|
|
|
|
// We show the whole stack but dedupe on the top component's name because
|
|
// the problematic code almost always lies inside that component.
|
|
const componentName = getComponentNameFromFiber(fiber) || 'ReactComponent';
|
|
if (didWarnStateUpdateForNotYetMountedComponent !== null) {
|
|
if (didWarnStateUpdateForNotYetMountedComponent.has(componentName)) {
|
|
return;
|
|
}
|
|
didWarnStateUpdateForNotYetMountedComponent.add(componentName);
|
|
} else {
|
|
didWarnStateUpdateForNotYetMountedComponent = new Set([componentName]);
|
|
}
|
|
|
|
const previousFiber = ReactCurrentFiberCurrent;
|
|
try {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
console.error(
|
|
"Can't perform a React state update on a component that hasn't mounted yet. " +
|
|
'This indicates that you have a side-effect in your render function that ' +
|
|
'asynchronously later calls tries to update the component. Move this work to ' +
|
|
'useEffect instead.',
|
|
);
|
|
} finally {
|
|
if (previousFiber) {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
} else {
|
|
resetCurrentDebugFiberInDEV();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let didWarnStateUpdateForUnmountedComponent: Set<string> | null = null;
|
|
function warnAboutUpdateOnUnmountedFiberInDEV(fiber) {
|
|
if (__DEV__) {
|
|
const tag = fiber.tag;
|
|
if (
|
|
tag !== HostRoot &&
|
|
tag !== ClassComponent &&
|
|
tag !== FunctionComponent &&
|
|
tag !== ForwardRef &&
|
|
tag !== MemoComponent &&
|
|
tag !== SimpleMemoComponent
|
|
) {
|
|
// Only warn for user-defined components, not internal ones like Suspense.
|
|
return;
|
|
}
|
|
|
|
if ((fiber.flags & PassiveStatic) !== NoFlags) {
|
|
const updateQueue: FunctionComponentUpdateQueue | null = (fiber.updateQueue: any);
|
|
if (updateQueue !== null) {
|
|
const lastEffect = updateQueue.lastEffect;
|
|
if (lastEffect !== null) {
|
|
const firstEffect = lastEffect.next;
|
|
|
|
let effect = firstEffect;
|
|
do {
|
|
if (effect.destroy !== undefined) {
|
|
if ((effect.tag & HookPassive) !== NoHookEffect) {
|
|
return;
|
|
}
|
|
}
|
|
effect = effect.next;
|
|
} while (effect !== firstEffect);
|
|
}
|
|
}
|
|
}
|
|
// We show the whole stack but dedupe on the top component's name because
|
|
// the problematic code almost always lies inside that component.
|
|
const componentName = getComponentNameFromFiber(fiber) || 'ReactComponent';
|
|
if (didWarnStateUpdateForUnmountedComponent !== null) {
|
|
if (didWarnStateUpdateForUnmountedComponent.has(componentName)) {
|
|
return;
|
|
}
|
|
didWarnStateUpdateForUnmountedComponent.add(componentName);
|
|
} else {
|
|
didWarnStateUpdateForUnmountedComponent = new Set([componentName]);
|
|
}
|
|
|
|
if (isFlushingPassiveEffects) {
|
|
// Do not warn if we are currently flushing passive effects!
|
|
//
|
|
// React can't directly detect a memory leak, but there are some clues that warn about one.
|
|
// One of these clues is when an unmounted React component tries to update its state.
|
|
// For example, if a component forgets to remove an event listener when unmounting,
|
|
// that listener may be called later and try to update state,
|
|
// at which point React would warn about the potential leak.
|
|
//
|
|
// Warning signals are the most useful when they're strong.
|
|
// (So we should avoid false positive warnings.)
|
|
// Updating state from within an effect cleanup function is sometimes a necessary pattern, e.g.:
|
|
// 1. Updating an ancestor that a component had registered itself with on mount.
|
|
// 2. Resetting state when a component is hidden after going offscreen.
|
|
} else {
|
|
const previousFiber = ReactCurrentFiberCurrent;
|
|
try {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
console.error(
|
|
"Can't perform a React state update on an unmounted component. This " +
|
|
'is a no-op, but it indicates a memory leak in your application. To ' +
|
|
'fix, cancel all subscriptions and asynchronous tasks in %s.',
|
|
tag === ClassComponent
|
|
? 'the componentWillUnmount method'
|
|
: 'a useEffect cleanup function',
|
|
);
|
|
} finally {
|
|
if (previousFiber) {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
} else {
|
|
resetCurrentDebugFiberInDEV();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let beginWork;
|
|
if (__DEV__ && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
|
|
const dummyFiber = null;
|
|
beginWork = (current, unitOfWork, lanes) => {
|
|
// If a component throws an error, we replay it again in a synchronously
|
|
// dispatched event, so that the debugger will treat it as an uncaught
|
|
// error See ReactErrorUtils for more information.
|
|
|
|
// Before entering the begin phase, copy the work-in-progress onto a dummy
|
|
// fiber. If beginWork throws, we'll use this to reset the state.
|
|
const originalWorkInProgressCopy = assignFiberPropertiesInDEV(
|
|
dummyFiber,
|
|
unitOfWork,
|
|
);
|
|
try {
|
|
return originalBeginWork(current, unitOfWork, lanes);
|
|
} catch (originalError) {
|
|
if (
|
|
originalError !== null &&
|
|
typeof originalError === 'object' &&
|
|
typeof originalError.then === 'function'
|
|
) {
|
|
// Don't replay promises. Treat everything else like an error.
|
|
throw originalError;
|
|
}
|
|
|
|
// Keep this code in sync with handleError; any changes here must have
|
|
// corresponding changes there.
|
|
resetContextDependencies();
|
|
resetHooksAfterThrow();
|
|
// Don't reset current debug fiber, since we're about to work on the
|
|
// same fiber again.
|
|
|
|
// Unwind the failed stack frame
|
|
unwindInterruptedWork(unitOfWork, workInProgressRootRenderLanes);
|
|
|
|
// Restore the original properties of the fiber.
|
|
assignFiberPropertiesInDEV(unitOfWork, originalWorkInProgressCopy);
|
|
|
|
if (enableProfilerTimer && unitOfWork.mode & ProfileMode) {
|
|
// Reset the profiler timer.
|
|
startProfilerTimer(unitOfWork);
|
|
}
|
|
|
|
// Run beginWork again.
|
|
invokeGuardedCallback(
|
|
null,
|
|
originalBeginWork,
|
|
null,
|
|
current,
|
|
unitOfWork,
|
|
lanes,
|
|
);
|
|
|
|
if (hasCaughtError()) {
|
|
const replayError = clearCaughtError();
|
|
if (
|
|
typeof replayError === 'object' &&
|
|
replayError !== null &&
|
|
replayError._suppressLogging &&
|
|
typeof originalError === 'object' &&
|
|
originalError !== null &&
|
|
!originalError._suppressLogging
|
|
) {
|
|
// If suppressed, let the flag carry over to the original error which is the one we'll rethrow.
|
|
originalError._suppressLogging = true;
|
|
}
|
|
}
|
|
// We always throw the original error in case the second render pass is not idempotent.
|
|
// This can happen if a memoized function or CommonJS module doesn't throw after first invokation.
|
|
throw originalError;
|
|
}
|
|
};
|
|
} else {
|
|
beginWork = originalBeginWork;
|
|
}
|
|
|
|
let didWarnAboutUpdateInRender = false;
|
|
let didWarnAboutUpdateInRenderForAnotherComponent;
|
|
if (__DEV__) {
|
|
didWarnAboutUpdateInRenderForAnotherComponent = new Set();
|
|
}
|
|
|
|
function warnAboutRenderPhaseUpdatesInDEV(fiber) {
|
|
if (__DEV__) {
|
|
if (
|
|
ReactCurrentDebugFiberIsRenderingInDEV &&
|
|
(executionContext & RenderContext) !== NoContext &&
|
|
!getIsUpdatingOpaqueValueInRenderPhaseInDEV()
|
|
) {
|
|
switch (fiber.tag) {
|
|
case FunctionComponent:
|
|
case ForwardRef:
|
|
case SimpleMemoComponent: {
|
|
const renderingComponentName =
|
|
(workInProgress && getComponentNameFromFiber(workInProgress)) ||
|
|
'Unknown';
|
|
// Dedupe by the rendering component because it's the one that needs to be fixed.
|
|
const dedupeKey = renderingComponentName;
|
|
if (!didWarnAboutUpdateInRenderForAnotherComponent.has(dedupeKey)) {
|
|
didWarnAboutUpdateInRenderForAnotherComponent.add(dedupeKey);
|
|
const setStateComponentName =
|
|
getComponentNameFromFiber(fiber) || 'Unknown';
|
|
console.error(
|
|
'Cannot update a component (`%s`) while rendering a ' +
|
|
'different component (`%s`). To locate the bad setState() call inside `%s`, ' +
|
|
'follow the stack trace as described in https://reactjs.org/link/setstate-in-render',
|
|
setStateComponentName,
|
|
renderingComponentName,
|
|
renderingComponentName,
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
case ClassComponent: {
|
|
if (!didWarnAboutUpdateInRender) {
|
|
console.error(
|
|
'Cannot update during an existing state transition (such as ' +
|
|
'within `render`). Render methods should be a pure ' +
|
|
'function of props and state.',
|
|
);
|
|
didWarnAboutUpdateInRender = true;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// a 'shared' variable that changes when act() opens/closes in tests.
|
|
export const IsThisRendererActing = {current: (false: boolean)};
|
|
|
|
export function restorePendingUpdaters(root: FiberRoot, lanes: Lanes): void {
|
|
if (enableUpdaterTracking) {
|
|
if (isDevToolsPresent) {
|
|
const memoizedUpdaters = root.memoizedUpdaters;
|
|
memoizedUpdaters.forEach(schedulingFiber => {
|
|
addFiberToLanesMap(root, schedulingFiber, lanes);
|
|
});
|
|
|
|
// This function intentionally does not clear memoized updaters.
|
|
// Those may still be relevant to the current commit
|
|
// and a future one (e.g. Suspense).
|
|
}
|
|
}
|
|
}
|
|
|
|
export function warnIfNotScopedWithMatchingAct(fiber: Fiber): void {
|
|
if (__DEV__) {
|
|
if (
|
|
warnsIfNotActing === true &&
|
|
IsSomeRendererActing.current === true &&
|
|
IsThisRendererActing.current !== true
|
|
) {
|
|
const previousFiber = ReactCurrentFiberCurrent;
|
|
try {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
console.error(
|
|
"It looks like you're using the wrong act() around your test interactions.\n" +
|
|
'Be sure to use the matching version of act() corresponding to your renderer:\n\n' +
|
|
'// for react-dom:\n' +
|
|
// Break up imports to avoid accidentally parsing them as dependencies.
|
|
'import {act} fr' +
|
|
"om 'react-dom/test-utils';\n" +
|
|
'// ...\n' +
|
|
'act(() => ...);\n\n' +
|
|
'// for react-test-renderer:\n' +
|
|
// Break up imports to avoid accidentally parsing them as dependencies.
|
|
'import TestRenderer fr' +
|
|
"om 'react-test-renderer';\n" +
|
|
'const {act} = TestRenderer;\n' +
|
|
'// ...\n' +
|
|
'act(() => ...);',
|
|
);
|
|
} finally {
|
|
if (previousFiber) {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
} else {
|
|
resetCurrentDebugFiberInDEV();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
export function warnIfNotCurrentlyActingEffectsInDEV(fiber: Fiber): void {
|
|
if (__DEV__) {
|
|
if (
|
|
warnsIfNotActing === true &&
|
|
(fiber.mode & StrictLegacyMode) !== NoMode &&
|
|
IsSomeRendererActing.current === false &&
|
|
IsThisRendererActing.current === false
|
|
) {
|
|
console.error(
|
|
'An update to %s ran an effect, but was not wrapped in act(...).\n\n' +
|
|
'When testing, code that causes React state updates should be ' +
|
|
'wrapped into act(...):\n\n' +
|
|
'act(() => {\n' +
|
|
' /* fire events that update state */\n' +
|
|
'});\n' +
|
|
'/* assert on the output */\n\n' +
|
|
"This ensures that you're testing the behavior the user would see " +
|
|
'in the browser.' +
|
|
' Learn more at https://reactjs.org/link/wrap-tests-with-act',
|
|
getComponentNameFromFiber(fiber),
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
function warnIfNotCurrentlyActingUpdatesInDEV(fiber: Fiber): void {
|
|
if (__DEV__) {
|
|
if (
|
|
warnsIfNotActing === true &&
|
|
executionContext === NoContext &&
|
|
IsSomeRendererActing.current === false &&
|
|
IsThisRendererActing.current === false
|
|
) {
|
|
const previousFiber = ReactCurrentFiberCurrent;
|
|
try {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
console.error(
|
|
'An update to %s inside a test was not wrapped in act(...).\n\n' +
|
|
'When testing, code that causes React state updates should be ' +
|
|
'wrapped into act(...):\n\n' +
|
|
'act(() => {\n' +
|
|
' /* fire events that update state */\n' +
|
|
'});\n' +
|
|
'/* assert on the output */\n\n' +
|
|
"This ensures that you're testing the behavior the user would see " +
|
|
'in the browser.' +
|
|
' Learn more at https://reactjs.org/link/wrap-tests-with-act',
|
|
getComponentNameFromFiber(fiber),
|
|
);
|
|
} finally {
|
|
if (previousFiber) {
|
|
setCurrentDebugFiberInDEV(fiber);
|
|
} else {
|
|
resetCurrentDebugFiberInDEV();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
export const warnIfNotCurrentlyActingUpdatesInDev = warnIfNotCurrentlyActingUpdatesInDEV;
|
|
|
|
// In tests, we want to enforce a mocked scheduler.
|
|
let didWarnAboutUnmockedScheduler = false;
|
|
// TODO Before we release concurrent mode, revisit this and decide whether a mocked
|
|
// scheduler is the actual recommendation. The alternative could be a testing build,
|
|
// a new lib, or whatever; we dunno just yet. This message is for early adopters
|
|
// to get their tests right.
|
|
|
|
export function warnIfUnmockedScheduler(fiber: Fiber) {
|
|
if (__DEV__) {
|
|
if (
|
|
didWarnAboutUnmockedScheduler === false &&
|
|
Scheduler.unstable_flushAllWithoutAsserting === undefined
|
|
) {
|
|
if (fiber.mode & ConcurrentMode) {
|
|
didWarnAboutUnmockedScheduler = true;
|
|
console.error(
|
|
'In Concurrent or Sync modes, the "scheduler" module needs to be mocked ' +
|
|
'to guarantee consistent behaviour across tests and browsers. ' +
|
|
'For example, with jest: \n' +
|
|
// Break up requires to avoid accidentally parsing them as dependencies.
|
|
"jest.mock('scheduler', () => require" +
|
|
"('scheduler/unstable_mock'));\n\n" +
|
|
'For more info, visit https://reactjs.org/link/mock-scheduler',
|
|
);
|
|
} else if (warnAboutUnmockedScheduler === true) {
|
|
didWarnAboutUnmockedScheduler = true;
|
|
console.error(
|
|
'Starting from React v18, the "scheduler" module will need to be mocked ' +
|
|
'to guarantee consistent behaviour across tests and browsers. ' +
|
|
'For example, with jest: \n' +
|
|
// Break up requires to avoid accidentally parsing them as dependencies.
|
|
"jest.mock('scheduler', () => require" +
|
|
"('scheduler/unstable_mock'));\n\n" +
|
|
'For more info, visit https://reactjs.org/link/mock-scheduler',
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// `act` testing API
|
|
//
|
|
// TODO: This is mostly a copy-paste from the legacy `act`, which does not have
|
|
// access to the same internals that we do here. Some trade offs in the
|
|
// implementation no longer make sense.
|
|
|
|
let isFlushingAct = false;
|
|
let isInsideThisAct = false;
|
|
|
|
function shouldForceFlushFallbacksInDEV() {
|
|
// Never force flush in production. This function should get stripped out.
|
|
return __DEV__ && actingUpdatesScopeDepth > 0;
|
|
}
|
|
|
|
const flushMockScheduler = Scheduler.unstable_flushAllWithoutAsserting;
|
|
const isSchedulerMocked = typeof flushMockScheduler === 'function';
|
|
|
|
// Returns whether additional work was scheduled. Caller should keep flushing
|
|
// until there's no work left.
|
|
function flushActWork(): boolean {
|
|
if (flushMockScheduler !== undefined) {
|
|
const prevIsFlushing = isFlushingAct;
|
|
isFlushingAct = true;
|
|
try {
|
|
return flushMockScheduler();
|
|
} finally {
|
|
isFlushingAct = prevIsFlushing;
|
|
}
|
|
} else {
|
|
// No mock scheduler available. However, the only type of pending work is
|
|
// passive effects, which we control. So we can flush that.
|
|
const prevIsFlushing = isFlushingAct;
|
|
isFlushingAct = true;
|
|
try {
|
|
let didFlushWork = false;
|
|
while (flushPassiveEffects()) {
|
|
didFlushWork = true;
|
|
}
|
|
return didFlushWork;
|
|
} finally {
|
|
isFlushingAct = prevIsFlushing;
|
|
}
|
|
}
|
|
}
|
|
|
|
function flushWorkAndMicroTasks(onDone: (err: ?Error) => void) {
|
|
try {
|
|
flushActWork();
|
|
enqueueTask(() => {
|
|
if (flushActWork()) {
|
|
flushWorkAndMicroTasks(onDone);
|
|
} else {
|
|
onDone();
|
|
}
|
|
});
|
|
} catch (err) {
|
|
onDone(err);
|
|
}
|
|
}
|
|
|
|
// we track the 'depth' of the act() calls with this counter,
|
|
// so we can tell if any async act() calls try to run in parallel.
|
|
|
|
let actingUpdatesScopeDepth = 0;
|
|
let didWarnAboutUsingActInProd = false;
|
|
|
|
export function act(callback: () => Thenable<mixed>): Thenable<void> {
|
|
if (!__DEV__) {
|
|
if (didWarnAboutUsingActInProd === false) {
|
|
didWarnAboutUsingActInProd = true;
|
|
// eslint-disable-next-line react-internal/no-production-logging
|
|
console.error(
|
|
'act(...) is not supported in production builds of React, and might not behave as expected.',
|
|
);
|
|
}
|
|
}
|
|
|
|
const previousActingUpdatesScopeDepth = actingUpdatesScopeDepth;
|
|
actingUpdatesScopeDepth++;
|
|
|
|
const previousIsSomeRendererActing = IsSomeRendererActing.current;
|
|
const previousIsThisRendererActing = IsThisRendererActing.current;
|
|
const previousIsInsideThisAct = isInsideThisAct;
|
|
IsSomeRendererActing.current = true;
|
|
IsThisRendererActing.current = true;
|
|
isInsideThisAct = true;
|
|
|
|
function onDone() {
|
|
actingUpdatesScopeDepth--;
|
|
IsSomeRendererActing.current = previousIsSomeRendererActing;
|
|
IsThisRendererActing.current = previousIsThisRendererActing;
|
|
isInsideThisAct = previousIsInsideThisAct;
|
|
if (__DEV__) {
|
|
if (actingUpdatesScopeDepth > previousActingUpdatesScopeDepth) {
|
|
// if it's _less than_ previousActingUpdatesScopeDepth, then we can assume the 'other' one has warned
|
|
console.error(
|
|
'You seem to have overlapping act() calls, this is not supported. ' +
|
|
'Be sure to await previous act() calls before making a new one. ',
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
let result;
|
|
try {
|
|
result = batchedUpdates(callback);
|
|
} catch (error) {
|
|
// on sync errors, we still want to 'cleanup' and decrement actingUpdatesScopeDepth
|
|
onDone();
|
|
throw error;
|
|
}
|
|
|
|
if (
|
|
result !== null &&
|
|
typeof result === 'object' &&
|
|
typeof result.then === 'function'
|
|
) {
|
|
// setup a boolean that gets set to true only
|
|
// once this act() call is await-ed
|
|
let called = false;
|
|
if (__DEV__) {
|
|
if (typeof Promise !== 'undefined') {
|
|
//eslint-disable-next-line no-undef
|
|
Promise.resolve()
|
|
.then(() => {})
|
|
.then(() => {
|
|
if (called === false) {
|
|
console.error(
|
|
'You called act(async () => ...) without await. ' +
|
|
'This could lead to unexpected testing behaviour, interleaving multiple act ' +
|
|
'calls and mixing their scopes. You should - await act(async () => ...);',
|
|
);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
// in the async case, the returned thenable runs the callback, flushes
|
|
// effects and microtasks in a loop until flushPassiveEffects() === false,
|
|
// and cleans up
|
|
return {
|
|
then(resolve, reject) {
|
|
called = true;
|
|
result.then(
|
|
() => {
|
|
if (
|
|
actingUpdatesScopeDepth > 1 ||
|
|
(isSchedulerMocked === true &&
|
|
previousIsSomeRendererActing === true)
|
|
) {
|
|
onDone();
|
|
resolve();
|
|
return;
|
|
}
|
|
// we're about to exit the act() scope,
|
|
// now's the time to flush tasks/effects
|
|
flushWorkAndMicroTasks((err: ?Error) => {
|
|
onDone();
|
|
if (err) {
|
|
reject(err);
|
|
} else {
|
|
resolve();
|
|
}
|
|
});
|
|
},
|
|
err => {
|
|
onDone();
|
|
reject(err);
|
|
},
|
|
);
|
|
},
|
|
};
|
|
} else {
|
|
if (__DEV__) {
|
|
if (result !== undefined) {
|
|
console.error(
|
|
'The callback passed to act(...) function ' +
|
|
'must return undefined, or a Promise. You returned %s',
|
|
result,
|
|
);
|
|
}
|
|
}
|
|
|
|
// flush effects until none remain, and cleanup
|
|
try {
|
|
if (
|
|
actingUpdatesScopeDepth === 1 &&
|
|
(isSchedulerMocked === false || previousIsSomeRendererActing === false)
|
|
) {
|
|
// we're about to exit the act() scope,
|
|
// now's the time to flush effects
|
|
flushActWork();
|
|
}
|
|
onDone();
|
|
} catch (err) {
|
|
onDone();
|
|
throw err;
|
|
}
|
|
|
|
// in the sync case, the returned thenable only warns *if* await-ed
|
|
return {
|
|
then(resolve) {
|
|
if (__DEV__) {
|
|
console.error(
|
|
'Do not await the result of calling act(...) with sync logic, it is not a Promise.',
|
|
);
|
|
}
|
|
resolve();
|
|
},
|
|
};
|
|
}
|
|
}
|