KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use resolveRetryWakeable method in Playwright Internal

Best JavaScript code snippet using playwright-internal

ReactFiberCommitWork.js

Source:ReactFiberCommitWork.js

1/**2 * Copyright (c) Facebook, Inc. and its affiliates.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 * @flow8 */9import type {10  Instance,11  TextInstance,12  SuspenseInstance,13  Container,14  ChildSet,15  UpdatePayload,16} from './ReactFiberHostConfig';17import type {Fiber} from './ReactFiber';18import type {FiberRoot} from './ReactFiberRoot';19import type {ExpirationTime} from './ReactFiberExpirationTime';20import type {SuspenseState} from './ReactFiberSuspenseComponent';21import type {FunctionComponentUpdateQueue} from './ReactFiberHooks';22import type {Wakeable} from 'shared/ReactTypes';23import type {ReactPriorityLevel} from './SchedulerWithReactIntegration';24import {unstable_wrap as Schedule_tracing_wrap} from 'scheduler/tracing';25import {26  deferPassiveEffectCleanupDuringUnmount,27  enableSchedulerTracing,28  enableProfilerTimer,29  enableProfilerCommitHooks,30  enableSuspenseServerRenderer,31  enableDeprecatedFlareAPI,32  enableFundamentalAPI,33  enableSuspenseCallback,34  enableScopeAPI,35  runAllPassiveEffectDestroysBeforeCreates,36  enableUseEventAPI,37} from 'shared/ReactFeatureFlags';38import {39  FunctionComponent,40  ForwardRef,41  ClassComponent,42  HostRoot,43  HostComponent,44  HostText,45  HostPortal,46  Profiler,47  SuspenseComponent,48  DehydratedFragment,49  IncompleteClassComponent,50  MemoComponent,51  SimpleMemoComponent,52  SuspenseListComponent,53  FundamentalComponent,54  ScopeComponent,55  Block,56} from './ReactWorkTags';57import {58  invokeGuardedCallback,59  hasCaughtError,60  clearCaughtError,61} from 'shared/ReactErrorUtils';62import {63  NoEffect,64  ContentReset,65  Placement,66  Snapshot,67  Update,68  Passive,69} from './ReactSideEffectTags';70import getComponentName from 'shared/getComponentName';71import invariant from 'shared/invariant';72import {onCommitUnmount} from './ReactFiberDevToolsHook';73import {getStackByFiberInDevAndProd} from './ReactCurrentFiber';74import {resolveDefaultProps} from './ReactFiberLazyComponent';75import {76  getCommitTime,77  recordLayoutEffectDuration,78  recordPassiveEffectDuration,79  startLayoutEffectTimer,80  startPassiveEffectTimer,81} from './ReactProfilerTimer';82import {ProfileMode} from './ReactTypeOfMode';83import {commitUpdateQueue} from './ReactUpdateQueue';84import {85  getPublicInstance,86  supportsMutation,87  supportsPersistence,88  supportsHydration,89  commitMount,90  commitUpdate,91  resetTextContent,92  commitTextUpdate,93  appendChild,94  appendChildToContainer,95  insertBefore,96  insertInContainerBefore,97  removeChild,98  removeChildFromContainer,99  clearSuspenseBoundary,100  clearSuspenseBoundaryFromContainer,101  replaceContainerChildren,102  createContainerChildSet,103  hideInstance,104  hideTextInstance,105  unhideInstance,106  unhideTextInstance,107  unmountFundamentalComponent,108  updateFundamentalComponent,109  commitHydratedContainer,110  commitHydratedSuspenseInstance,111  beforeRemoveInstance,112} from './ReactFiberHostConfig';113import {114  captureCommitPhaseError,115  resolveRetryWakeable,116  markCommitTimeOfFallback,117  enqueuePendingPassiveHookEffectMount,118  enqueuePendingPassiveHookEffectUnmount,119  enqueuePendingPassiveProfilerEffect,120} from './ReactFiberWorkLoop';121import {122  NoEffect as NoHookEffect,123  HasEffect as HookHasEffect,124  Layout as HookLayout,125  Passive as HookPassive,126} from './ReactHookEffectTags';127import {didWarnAboutReassigningProps} from './ReactFiberBeginWork';128import {runWithPriority, NormalPriority} from './SchedulerWithReactIntegration';129import {130  updateDeprecatedEventListeners,131  unmountDeprecatedResponderListeners,132} from './ReactFiberDeprecatedEvents';133let didWarnAboutUndefinedSnapshotBeforeUpdate: Set<mixed> | null = null;134if (__DEV__) {135  didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();136}137const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;138const callComponentWillUnmountWithTimer = function(current, instance) {139  instance.props = current.memoizedProps;140  instance.state = current.memoizedState;141  if (142    enableProfilerTimer &&143    enableProfilerCommitHooks &&144    current.mode & ProfileMode145  ) {146    try {147      startLayoutEffectTimer();148      instance.componentWillUnmount();149    } finally {150      recordLayoutEffectDuration(current);151    }152  } else {153    instance.componentWillUnmount();154  }155};156// Capture errors so they don't interrupt unmounting.157function safelyCallComponentWillUnmount(current, instance) {158  if (__DEV__) {159    invokeGuardedCallback(160      null,161      callComponentWillUnmountWithTimer,162      null,163      current,164      instance,165    );166    if (hasCaughtError()) {167      const unmountError = clearCaughtError();168      captureCommitPhaseError(current, unmountError);169    }170  } else {171    try {172      callComponentWillUnmountWithTimer(current, instance);173    } catch (unmountError) {174      captureCommitPhaseError(current, unmountError);175    }176  }177}178function safelyDetachRef(current: Fiber) {179  const ref = current.ref;180  if (ref !== null) {181    if (typeof ref === 'function') {182      if (__DEV__) {183        invokeGuardedCallback(null, ref, null, null);184        if (hasCaughtError()) {185          const refError = clearCaughtError();186          captureCommitPhaseError(current, refError);187        }188      } else {189        try {190          ref(null);191        } catch (refError) {192          captureCommitPhaseError(current, refError);193        }194      }195    } else {196      ref.current = null;197    }198  }199}200function safelyCallDestroy(current, destroy) {201  if (__DEV__) {202    invokeGuardedCallback(null, destroy, null);203    if (hasCaughtError()) {204      const error = clearCaughtError();205      captureCommitPhaseError(current, error);206    }207  } else {208    try {209      destroy();210    } catch (error) {211      captureCommitPhaseError(current, error);212    }213  }214}215function commitBeforeMutationLifeCycles(216  current: Fiber | null,217  finishedWork: Fiber,218): void {219  switch (finishedWork.tag) {220    case FunctionComponent:221    case ForwardRef:222    case SimpleMemoComponent:223    case Block: {224      return;225    }226    case ClassComponent: {227      if (finishedWork.effectTag & Snapshot) {228        if (current !== null) {229          const prevProps = current.memoizedProps;230          const prevState = current.memoizedState;231          const instance = finishedWork.stateNode;232          // We could update instance props and state here,233          // but instead we rely on them being set during last render.234          // TODO: revisit this when we implement resuming.235          if (__DEV__) {236            if (237              finishedWork.type === finishedWork.elementType &&238              !didWarnAboutReassigningProps239            ) {240              if (instance.props !== finishedWork.memoizedProps) {241                console.error(242                  'Expected %s props to match memoized props before ' +243                    'getSnapshotBeforeUpdate. ' +244                    'This might either be because of a bug in React, or because ' +245                    'a component reassigns its own `this.props`. ' +246                    'Please file an issue.',247                  getComponentName(finishedWork.type) || 'instance',248                );249              }250              if (instance.state !== finishedWork.memoizedState) {251                console.error(252                  'Expected %s state to match memoized state before ' +253                    'getSnapshotBeforeUpdate. ' +254                    'This might either be because of a bug in React, or because ' +255                    'a component reassigns its own `this.state`. ' +256                    'Please file an issue.',257                  getComponentName(finishedWork.type) || 'instance',258                );259              }260            }261          }262          const snapshot = instance.getSnapshotBeforeUpdate(263            finishedWork.elementType === finishedWork.type264              ? prevProps265              : resolveDefaultProps(finishedWork.type, prevProps),266            prevState,267          );268          if (__DEV__) {269            const didWarnSet = ((didWarnAboutUndefinedSnapshotBeforeUpdate: any): Set<mixed>);270            if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {271              didWarnSet.add(finishedWork.type);272              console.error(273                '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' +274                  'must be returned. You have returned undefined.',275                getComponentName(finishedWork.type),276              );277            }278          }279          instance.__reactInternalSnapshotBeforeUpdate = snapshot;280        }281      }282      return;283    }284    case HostRoot:285    case HostComponent:286    case HostText:287    case HostPortal:288    case IncompleteClassComponent:289      // Nothing to do for these component types290      return;291  }292  invariant(293    false,294    'This unit of work tag should not have side-effects. This error is ' +295      'likely caused by a bug in React. Please file an issue.',296  );297}298function commitHookEffectListUnmount(tag: number, finishedWork: Fiber) {299  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);300  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;301  if (lastEffect !== null) {302    const firstEffect = lastEffect.next;303    let effect = firstEffect;304    do {305      if ((effect.tag & tag) === tag) {306        // Unmount307        const destroy = effect.destroy;308        effect.destroy = undefined;309        if (destroy !== undefined) {310          destroy();311        }312      }313      effect = effect.next;314    } while (effect !== firstEffect);315  }316}317function commitHookEffectListMount(tag: number, finishedWork: Fiber) {318  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);319  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;320  if (lastEffect !== null) {321    const firstEffect = lastEffect.next;322    let effect = firstEffect;323    do {324      if ((effect.tag & tag) === tag) {325        // Mount326        const create = effect.create;327        effect.destroy = create();328        if (__DEV__) {329          const destroy = effect.destroy;330          if (destroy !== undefined && typeof destroy !== 'function') {331            let addendum;332            if (destroy === null) {333              addendum =334                ' You returned null. If your effect does not require clean ' +335                'up, return undefined (or nothing).';336            } else if (typeof destroy.then === 'function') {337              addendum =338                '\n\nIt looks like you wrote useEffect(async () => ...) or returned a Promise. ' +339                'Instead, write the async function inside your effect ' +340                'and call it immediately:\n\n' +341                'useEffect(() => {\n' +342                '  async function fetchData() {\n' +343                '    // You can await here\n' +344                '    const response = await MyAPI.getData(someId);\n' +345                '    // ...\n' +346                '  }\n' +347                '  fetchData();\n' +348                `}, [someId]); // Or [] if effect doesn't need props or state\n\n` +349                'Learn more about data fetching with Hooks: https://fb.me/react-hooks-data-fetching';350            } else {351              addendum = ' You returned: ' + destroy;352            }353            console.error(354              'An effect function must not return anything besides a function, ' +355                'which is used for clean-up.%s%s',356              addendum,357              getStackByFiberInDevAndProd(finishedWork),358            );359          }360        }361      }362      effect = effect.next;363    } while (effect !== firstEffect);364  }365}366function schedulePassiveEffects(finishedWork: Fiber) {367  if (runAllPassiveEffectDestroysBeforeCreates) {368    const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);369    const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;370    if (lastEffect !== null) {371      const firstEffect = lastEffect.next;372      let effect = firstEffect;373      do {374        const {next, tag} = effect;375        if (376          (tag & HookPassive) !== NoHookEffect &&377          (tag & HookHasEffect) !== NoHookEffect378        ) {379          enqueuePendingPassiveHookEffectUnmount(finishedWork, effect);380          enqueuePendingPassiveHookEffectMount(finishedWork, effect);381        }382        effect = next;383      } while (effect !== firstEffect);384    }385  }386}387export function commitPassiveHookEffects(finishedWork: Fiber): void {388  if ((finishedWork.effectTag & Passive) !== NoEffect) {389    switch (finishedWork.tag) {390      case FunctionComponent:391      case ForwardRef:392      case SimpleMemoComponent:393      case Block: {394        // TODO (#17945) We should call all passive destroy functions (for all fibers)395        // before calling any create functions. The current approach only serializes396        // these for a single fiber.397        if (398          enableProfilerTimer &&399          enableProfilerCommitHooks &&400          finishedWork.mode & ProfileMode401        ) {402          try {403            startPassiveEffectTimer();404            commitHookEffectListUnmount(405              HookPassive | HookHasEffect,406              finishedWork,407            );408            commitHookEffectListMount(409              HookPassive | HookHasEffect,410              finishedWork,411            );412          } finally {413            recordPassiveEffectDuration(finishedWork);414          }415        } else {416          commitHookEffectListUnmount(417            HookPassive | HookHasEffect,418            finishedWork,419          );420          commitHookEffectListMount(HookPassive | HookHasEffect, finishedWork);421        }422        break;423      }424      default:425        break;426    }427  }428}429export function commitPassiveEffectDurations(430  finishedRoot: FiberRoot,431  finishedWork: Fiber,432): void {433  if (enableProfilerTimer && enableProfilerCommitHooks) {434    // Only Profilers with work in their subtree will have an Update effect scheduled.435    if ((finishedWork.effectTag & Update) !== NoEffect) {436      switch (finishedWork.tag) {437        case Profiler: {438          const {passiveEffectDuration} = finishedWork.stateNode;439          const {id, onPostCommit} = finishedWork.memoizedProps;440          // This value will still reflect the previous commit phase.441          // It does not get reset until the start of the next commit phase.442          const commitTime = getCommitTime();443          if (typeof onPostCommit === 'function') {444            if (enableSchedulerTracing) {445              onPostCommit(446                id,447                finishedWork.alternate === null ? 'mount' : 'update',448                passiveEffectDuration,449                commitTime,450                finishedRoot.memoizedInteractions,451              );452            } else {453              onPostCommit(454                id,455                finishedWork.alternate === null ? 'mount' : 'update',456                passiveEffectDuration,457                commitTime,458              );459            }460          }461          // Bubble times to the next nearest ancestor Profiler.462          // After we process that Profiler, we'll bubble further up.463          let parentFiber = finishedWork.return;464          while (parentFiber !== null) {465            if (parentFiber.tag === Profiler) {466              const parentStateNode = parentFiber.stateNode;467              parentStateNode.passiveEffectDuration += passiveEffectDuration;468              break;469            }470            parentFiber = parentFiber.return;471          }472          break;473        }474        default:475          break;476      }477    }478  }479}480function commitLifeCycles(481  finishedRoot: FiberRoot,482  current: Fiber | null,483  finishedWork: Fiber,484  committedExpirationTime: ExpirationTime,485): void {486  switch (finishedWork.tag) {487    case FunctionComponent:488    case ForwardRef:489    case SimpleMemoComponent:490    case Block: {491      // At this point layout effects have already been destroyed (during mutation phase).492      // This is done to prevent sibling component effects from interfering with each other,493      // e.g. a destroy function in one component should never override a ref set494      // by a create function in another component during the same commit.495      if (496        enableProfilerTimer &&497        enableProfilerCommitHooks &&498        finishedWork.mode & ProfileMode499      ) {500        try {501          startLayoutEffectTimer();502          commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);503        } finally {504          recordLayoutEffectDuration(finishedWork);505        }506      } else {507        commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);508      }509      if (runAllPassiveEffectDestroysBeforeCreates) {510        schedulePassiveEffects(finishedWork);511      }512      return;513    }514    case ClassComponent: {515      const instance = finishedWork.stateNode;516      if (finishedWork.effectTag & Update) {517        if (current === null) {518          // We could update instance props and state here,519          // but instead we rely on them being set during last render.520          // TODO: revisit this when we implement resuming.521          if (__DEV__) {522            if (523              finishedWork.type === finishedWork.elementType &&524              !didWarnAboutReassigningProps525            ) {526              if (instance.props !== finishedWork.memoizedProps) {527                console.error(528                  'Expected %s props to match memoized props before ' +529                    'componentDidMount. ' +530                    'This might either be because of a bug in React, or because ' +531                    'a component reassigns its own `this.props`. ' +532                    'Please file an issue.',533                  getComponentName(finishedWork.type) || 'instance',534                );535              }536              if (instance.state !== finishedWork.memoizedState) {537                console.error(538                  'Expected %s state to match memoized state before ' +539                    'componentDidMount. ' +540                    'This might either be because of a bug in React, or because ' +541                    'a component reassigns its own `this.state`. ' +542                    'Please file an issue.',543                  getComponentName(finishedWork.type) || 'instance',544                );545              }546            }547          }548          if (549            enableProfilerTimer &&550            enableProfilerCommitHooks &&551            finishedWork.mode & ProfileMode552          ) {553            try {554              startLayoutEffectTimer();555              instance.componentDidMount();556            } finally {557              recordLayoutEffectDuration(finishedWork);558            }559          } else {560            instance.componentDidMount();561          }562        } else {563          const prevProps =564            finishedWork.elementType === finishedWork.type565              ? current.memoizedProps566              : resolveDefaultProps(finishedWork.type, current.memoizedProps);567          const prevState = current.memoizedState;568          // We could update instance props and state here,569          // but instead we rely on them being set during last render.570          // TODO: revisit this when we implement resuming.571          if (__DEV__) {572            if (573              finishedWork.type === finishedWork.elementType &&574              !didWarnAboutReassigningProps575            ) {576              if (instance.props !== finishedWork.memoizedProps) {577                console.error(578                  'Expected %s props to match memoized props before ' +579                    'componentDidUpdate. ' +580                    'This might either be because of a bug in React, or because ' +581                    'a component reassigns its own `this.props`. ' +582                    'Please file an issue.',583                  getComponentName(finishedWork.type) || 'instance',584                );585              }586              if (instance.state !== finishedWork.memoizedState) {587                console.error(588                  'Expected %s state to match memoized state before ' +589                    'componentDidUpdate. ' +590                    'This might either be because of a bug in React, or because ' +591                    'a component reassigns its own `this.state`. ' +592                    'Please file an issue.',593                  getComponentName(finishedWork.type) || 'instance',594                );595              }596            }597          }598          if (599            enableProfilerTimer &&600            enableProfilerCommitHooks &&601            finishedWork.mode & ProfileMode602          ) {603            try {604              startLayoutEffectTimer();605              instance.componentDidUpdate(606                prevProps,607                prevState,608                instance.__reactInternalSnapshotBeforeUpdate,609              );610            } finally {611              recordLayoutEffectDuration(finishedWork);612            }613          } else {614            instance.componentDidUpdate(615              prevProps,616              prevState,617              instance.__reactInternalSnapshotBeforeUpdate,618            );619          }620        }621      }622      const updateQueue = finishedWork.updateQueue;623      if (updateQueue !== null) {624        if (__DEV__) {625          if (626            finishedWork.type === finishedWork.elementType &&627            !didWarnAboutReassigningProps628          ) {629            if (instance.props !== finishedWork.memoizedProps) {630              console.error(631                'Expected %s props to match memoized props before ' +632                  'processing the update queue. ' +633                  'This might either be because of a bug in React, or because ' +634                  'a component reassigns its own `this.props`. ' +635                  'Please file an issue.',636                getComponentName(finishedWork.type) || 'instance',637              );638            }639            if (instance.state !== finishedWork.memoizedState) {640              console.error(641                'Expected %s state to match memoized state before ' +642                  'processing the update queue. ' +643                  'This might either be because of a bug in React, or because ' +644                  'a component reassigns its own `this.state`. ' +645                  'Please file an issue.',646                getComponentName(finishedWork.type) || 'instance',647              );648            }649          }650        }651        // We could update instance props and state here,652        // but instead we rely on them being set during last render.653        // TODO: revisit this when we implement resuming.654        commitUpdateQueue(finishedWork, updateQueue, instance);655      }656      return;657    }658    case HostRoot: {659      const updateQueue = finishedWork.updateQueue;660      if (updateQueue !== null) {661        let instance = null;662        if (finishedWork.child !== null) {663          switch (finishedWork.child.tag) {664            case HostComponent:665              instance = getPublicInstance(finishedWork.child.stateNode);666              break;667            case ClassComponent:668              instance = finishedWork.child.stateNode;669              break;670          }671        }672        commitUpdateQueue(finishedWork, updateQueue, instance);673      }674      return;675    }676    case HostComponent: {677      const instance: Instance = finishedWork.stateNode;678      // Renderers may schedule work to be done after host components are mounted679      // (eg DOM renderer may schedule auto-focus for inputs and form controls).680      // These effects should only be committed when components are first mounted,681      // aka when there is no current/alternate.682      if (current === null && finishedWork.effectTag & Update) {683        const type = finishedWork.type;684        const props = finishedWork.memoizedProps;685        commitMount(instance, type, props, finishedWork);686      }687      return;688    }689    case HostText: {690      // We have no life-cycles associated with text.691      return;692    }693    case HostPortal: {694      // We have no life-cycles associated with portals.695      return;696    }697    case Profiler: {698      if (enableProfilerTimer) {699        const {onCommit, onRender} = finishedWork.memoizedProps;700        const {effectDuration} = finishedWork.stateNode;701        const commitTime = getCommitTime();702        if (typeof onRender === 'function') {703          if (enableSchedulerTracing) {704            onRender(705              finishedWork.memoizedProps.id,706              current === null ? 'mount' : 'update',707              finishedWork.actualDuration,708              finishedWork.treeBaseDuration,709              finishedWork.actualStartTime,710              commitTime,711              finishedRoot.memoizedInteractions,712            );713          } else {714            onRender(715              finishedWork.memoizedProps.id,716              current === null ? 'mount' : 'update',717              finishedWork.actualDuration,718              finishedWork.treeBaseDuration,719              finishedWork.actualStartTime,720              commitTime,721            );722          }723        }724        if (enableProfilerCommitHooks) {725          if (typeof onCommit === 'function') {726            if (enableSchedulerTracing) {727              onCommit(728                finishedWork.memoizedProps.id,729                current === null ? 'mount' : 'update',730                effectDuration,731                commitTime,732                finishedRoot.memoizedInteractions,733              );734            } else {735              onCommit(736                finishedWork.memoizedProps.id,737                current === null ? 'mount' : 'update',738                effectDuration,739                commitTime,740              );741            }742          }743          // Schedule a passive effect for this Profiler to call onPostCommit hooks.744          // This effect should be scheduled even if there is no onPostCommit callback for this Profiler,745          // because the effect is also where times bubble to parent Profilers.746          enqueuePendingPassiveProfilerEffect(finishedWork);747          // Propagate layout effect durations to the next nearest Profiler ancestor.748          // Do not reset these values until the next render so DevTools has a chance to read them first.749          let parentFiber = finishedWork.return;750          while (parentFiber !== null) {751            if (parentFiber.tag === Profiler) {752              const parentStateNode = parentFiber.stateNode;753              parentStateNode.effectDuration += effectDuration;754              break;755            }756            parentFiber = parentFiber.return;757          }758        }759      }760      return;761    }762    case SuspenseComponent: {763      commitSuspenseHydrationCallbacks(finishedRoot, finishedWork);764      return;765    }766    case SuspenseListComponent:767    case IncompleteClassComponent:768    case FundamentalComponent:769    case ScopeComponent:770      return;771  }772  invariant(773    false,774    'This unit of work tag should not have side-effects. This error is ' +775      'likely caused by a bug in React. Please file an issue.',776  );777}778function hideOrUnhideAllChildren(finishedWork, isHidden) {779  if (supportsMutation) {780    // We only have the top Fiber that was inserted but we need to recurse down its781    // children to find all the terminal nodes.782    let node: Fiber = finishedWork;783    while (true) {784      if (node.tag === HostComponent) {785        const instance = node.stateNode;786        if (isHidden) {787          hideInstance(instance);788        } else {789          unhideInstance(node.stateNode, node.memoizedProps);790        }791      } else if (node.tag === HostText) {792        const instance = node.stateNode;793        if (isHidden) {794          hideTextInstance(instance);795        } else {796          unhideTextInstance(instance, node.memoizedProps);797        }798      } else if (799        node.tag === SuspenseComponent &&800        node.memoizedState !== null &&801        node.memoizedState.dehydrated === null802      ) {803        // Found a nested Suspense component that timed out. Skip over the804        // primary child fragment, which should remain hidden.805        const fallbackChildFragment: Fiber = (node.child: any).sibling;806        fallbackChildFragment.return = node;807        node = fallbackChildFragment;808        continue;809      } else if (node.child !== null) {810        node.child.return = node;811        node = node.child;812        continue;813      }814      if (node === finishedWork) {815        return;816      }817      while (node.sibling === null) {818        if (node.return === null || node.return === finishedWork) {819          return;820        }821        node = node.return;822      }823      node.sibling.return = node.return;824      node = node.sibling;825    }826  }827}828function commitAttachRef(finishedWork: Fiber) {829  const ref = finishedWork.ref;830  if (ref !== null) {831    const instance = finishedWork.stateNode;832    let instanceToUse;833    switch (finishedWork.tag) {834      case HostComponent:835        instanceToUse = getPublicInstance(instance);836        break;837      default:838        instanceToUse = instance;839    }840    // Moved outside to ensure DCE works with this flag841    if (enableScopeAPI && finishedWork.tag === ScopeComponent) {842      instanceToUse = instance.methods;843    }844    if (typeof ref === 'function') {845      ref(instanceToUse);846    } else {847      if (__DEV__) {848        if (!ref.hasOwnProperty('current')) {849          console.error(850            'Unexpected ref object provided for %s. ' +851              'Use either a ref-setter function or React.createRef().%s',852            getComponentName(finishedWork.type),853            getStackByFiberInDevAndProd(finishedWork),854          );855        }856      }857      ref.current = instanceToUse;858    }859  }860}861function commitDetachRef(current: Fiber) {862  const currentRef = current.ref;863  if (currentRef !== null) {864    if (typeof currentRef === 'function') {865      currentRef(null);866    } else {867      currentRef.current = null;868    }869  }870}871// User-originating errors (lifecycles and refs) should not interrupt872// deletion, so don't let them throw. Host-originating errors should873// interrupt deletion, so it's okay874function commitUnmount(875  finishedRoot: FiberRoot,876  current: Fiber,877  renderPriorityLevel: ReactPriorityLevel,878): void {879  onCommitUnmount(current);880  switch (current.tag) {881    case FunctionComponent:882    case ForwardRef:883    case MemoComponent:884    case SimpleMemoComponent:885    case Block: {886      const updateQueue: FunctionComponentUpdateQueue | null = (current.updateQueue: any);887      if (updateQueue !== null) {888        const lastEffect = updateQueue.lastEffect;889        if (lastEffect !== null) {890          const firstEffect = lastEffect.next;891          if (892            deferPassiveEffectCleanupDuringUnmount &&893            runAllPassiveEffectDestroysBeforeCreates894          ) {895            let effect = firstEffect;896            do {897              const {destroy, tag} = effect;898              if (destroy !== undefined) {899                if ((tag & HookPassive) !== NoHookEffect) {900                  enqueuePendingPassiveHookEffectUnmount(current, effect);901                } else {902                  if (903                    enableProfilerTimer &&904                    enableProfilerCommitHooks &&905                    current.mode & ProfileMode906                  ) {907                    startLayoutEffectTimer();908                    safelyCallDestroy(current, destroy);909                    recordLayoutEffectDuration(current);910                  } else {911                    safelyCallDestroy(current, destroy);912                  }913                }914              }915              effect = effect.next;916            } while (effect !== firstEffect);917          } else {918            // When the owner fiber is deleted, the destroy function of a passive919            // effect hook is called during the synchronous commit phase. This is920            // a concession to implementation complexity. Calling it in the921            // passive effect phase (like they usually are, when dependencies922            // change during an update) would require either traversing the923            // children of the deleted fiber again, or including unmount effects924            // as part of the fiber effect list.925            //926            // Because this is during the sync commit phase, we need to change927            // the priority.928            //929            // TODO: Reconsider this implementation trade off.930            const priorityLevel =931              renderPriorityLevel > NormalPriority932                ? NormalPriority933                : renderPriorityLevel;934            runWithPriority(priorityLevel, () => {935              let effect = firstEffect;936              do {937                const {destroy, tag} = effect;938                if (destroy !== undefined) {939                  if (940                    enableProfilerTimer &&941                    enableProfilerCommitHooks &&942                    current.mode & ProfileMode943                  ) {944                    if ((tag & HookPassive) !== NoHookEffect) {945                      safelyCallDestroy(current, destroy);946                    } else {947                      startLayoutEffectTimer();948                      safelyCallDestroy(current, destroy);949                      recordLayoutEffectDuration(current);950                    }951                  } else {952                    safelyCallDestroy(current, destroy);953                  }954                }955                effect = effect.next;956              } while (effect !== firstEffect);957            });958          }959        }960      }961      return;962    }963    case ClassComponent: {964      safelyDetachRef(current);965      const instance = current.stateNode;966      if (typeof instance.componentWillUnmount === 'function') {967        safelyCallComponentWillUnmount(current, instance);968      }969      return;970    }971    case HostComponent: {972      if (enableDeprecatedFlareAPI) {973        unmountDeprecatedResponderListeners(current);974      }975      if (enableDeprecatedFlareAPI || enableUseEventAPI) {976        beforeRemoveInstance(current.stateNode);977      }978      safelyDetachRef(current);979      return;980    }981    case HostPortal: {982      // TODO: this is recursive.983      // We are also not using this parent because984      // the portal will get pushed immediately.985      if (supportsMutation) {986        unmountHostComponents(finishedRoot, current, renderPriorityLevel);987      } else if (supportsPersistence) {988        emptyPortalContainer(current);989      }990      return;991    }992    case FundamentalComponent: {993      if (enableFundamentalAPI) {994        const fundamentalInstance = current.stateNode;995        if (fundamentalInstance !== null) {996          unmountFundamentalComponent(fundamentalInstance);997          current.stateNode = null;998        }999      }1000      return;1001    }1002    case DehydratedFragment: {1003      if (enableSuspenseCallback) {1004        const hydrationCallbacks = finishedRoot.hydrationCallbacks;1005        if (hydrationCallbacks !== null) {1006          const onDeleted = hydrationCallbacks.onDeleted;1007          if (onDeleted) {1008            onDeleted((current.stateNode: SuspenseInstance));1009          }1010        }1011      }1012      return;1013    }1014    case ScopeComponent: {1015      if (enableDeprecatedFlareAPI) {1016        unmountDeprecatedResponderListeners(current);1017      }1018      if (enableScopeAPI) {1019        safelyDetachRef(current);1020      }1021      return;1022    }1023  }1024}1025function commitNestedUnmounts(1026  finishedRoot: FiberRoot,1027  root: Fiber,1028  renderPriorityLevel: ReactPriorityLevel,1029): void {1030  // While we're inside a removed host node we don't want to call1031  // removeChild on the inner nodes because they're removed by the top1032  // call anyway. We also want to call componentWillUnmount on all1033  // composites before this host node is removed from the tree. Therefore1034  // we do an inner loop while we're still inside the host node.1035  let node: Fiber = root;1036  while (true) {1037    commitUnmount(finishedRoot, node, renderPriorityLevel);1038    // Visit children because they may contain more composite or host nodes.1039    // Skip portals because commitUnmount() currently visits them recursively.1040    if (1041      node.child !== null &&1042      // If we use mutation we drill down into portals using commitUnmount above.1043      // If we don't use mutation we drill down into portals here instead.1044      (!supportsMutation || node.tag !== HostPortal)1045    ) {1046      node.child.return = node;1047      node = node.child;1048      continue;1049    }1050    if (node === root) {1051      return;1052    }1053    while (node.sibling === null) {1054      if (node.return === null || node.return === root) {1055        return;1056      }1057      node = node.return;1058    }1059    node.sibling.return = node.return;1060    node = node.sibling;1061  }1062}1063function detachFiber(current: Fiber) {1064  const alternate = current.alternate;1065  // Cut off the return pointers to disconnect it from the tree. Ideally, we1066  // should clear the child pointer of the parent alternate to let this1067  // get GC:ed but we don't know which for sure which parent is the current1068  // one so we'll settle for GC:ing the subtree of this child. This child1069  // itself will be GC:ed when the parent updates the next time.1070  current.return = null;1071  current.child = null;1072  current.memoizedState = null;1073  current.updateQueue = null;1074  current.dependencies = null;1075  current.alternate = null;1076  current.firstEffect = null;1077  current.lastEffect = null;1078  current.pendingProps = null;1079  current.memoizedProps = null;1080  current.stateNode = null;1081  if (alternate !== null) {1082    detachFiber(alternate);1083  }1084}1085function emptyPortalContainer(current: Fiber) {1086  if (!supportsPersistence) {1087    return;1088  }1089  const portal: {1090    containerInfo: Container,1091    pendingChildren: ChildSet,1092    ...1093  } = current.stateNode;1094  const {containerInfo} = portal;1095  const emptyChildSet = createContainerChildSet(containerInfo);1096  replaceContainerChildren(containerInfo, emptyChildSet);1097}1098function commitContainer(finishedWork: Fiber) {1099  if (!supportsPersistence) {1100    return;1101  }1102  switch (finishedWork.tag) {1103    case ClassComponent:1104    case HostComponent:1105    case HostText:1106    case FundamentalComponent: {1107      return;1108    }1109    case HostRoot:1110    case HostPortal: {1111      const portalOrRoot: {1112        containerInfo: Container,1113        pendingChildren: ChildSet,1114        ...1115      } = finishedWork.stateNode;1116      const {containerInfo, pendingChildren} = portalOrRoot;1117      replaceContainerChildren(containerInfo, pendingChildren);1118      return;1119    }1120  }1121  invariant(1122    false,1123    'This unit of work tag should not have side-effects. This error is ' +1124      'likely caused by a bug in React. Please file an issue.',1125  );1126}1127function getHostParentFiber(fiber: Fiber): Fiber {1128  let parent = fiber.return;1129  while (parent !== null) {1130    if (isHostParent(parent)) {1131      return parent;1132    }1133    parent = parent.return;1134  }1135  invariant(1136    false,1137    'Expected to find a host parent. This error is likely caused by a bug ' +1138      'in React. Please file an issue.',1139  );1140}1141function isHostParent(fiber: Fiber): boolean {1142  return (1143    fiber.tag === HostComponent ||1144    fiber.tag === HostRoot ||1145    fiber.tag === HostPortal1146  );1147}1148function getHostSibling(fiber: Fiber): ?Instance {1149  // We're going to search forward into the tree until we find a sibling host1150  // node. Unfortunately, if multiple insertions are done in a row we have to1151  // search past them. This leads to exponential search for the next sibling.1152  // TODO: Find a more efficient way to do this.1153  let node: Fiber = fiber;1154  siblings: while (true) {1155    // If we didn't find anything, let's try the next sibling.1156    while (node.sibling === null) {1157      if (node.return === null || isHostParent(node.return)) {1158        // If we pop out of the root or hit the parent the fiber we are the1159        // last sibling.1160        return null;1161      }1162      node = node.return;1163    }1164    node.sibling.return = node.return;1165    node = node.sibling;1166    while (1167      node.tag !== HostComponent &&1168      node.tag !== HostText &&1169      node.tag !== DehydratedFragment1170    ) {1171      // If it is not host node and, we might have a host node inside it.1172      // Try to search down until we find one.1173      if (node.effectTag & Placement) {1174        // If we don't have a child, try the siblings instead.1175        continue siblings;1176      }1177      // If we don't have a child, try the siblings instead.1178      // We also skip portals because they are not part of this host tree.1179      if (node.child === null || node.tag === HostPortal) {1180        continue siblings;1181      } else {1182        node.child.return = node;1183        node = node.child;1184      }1185    }1186    // Check if this host node is stable or about to be placed.1187    if (!(node.effectTag & Placement)) {1188      // Found it!1189      return node.stateNode;1190    }1191  }1192}1193function commitPlacement(finishedWork: Fiber): void {1194  if (!supportsMutation) {1195    return;1196  }1197  // Recursively insert all host nodes into the parent.1198  const parentFiber = getHostParentFiber(finishedWork);1199  // Note: these two variables *must* always be updated together.1200  let parent;1201  let isContainer;1202  const parentStateNode = parentFiber.stateNode;1203  switch (parentFiber.tag) {1204    case HostComponent:1205      parent = parentStateNode;1206      isContainer = false;1207      break;1208    case HostRoot:1209      parent = parentStateNode.containerInfo;1210      isContainer = true;1211      break;1212    case HostPortal:1213      parent = parentStateNode.containerInfo;1214      isContainer = true;1215      break;1216    case FundamentalComponent:1217      if (enableFundamentalAPI) {1218        parent = parentStateNode.instance;1219        isContainer = false;1220      }1221    // eslint-disable-next-line-no-fallthrough1222    default:1223      invariant(1224        false,1225        'Invalid host parent fiber. This error is likely caused by a bug ' +1226          'in React. Please file an issue.',1227      );1228  }1229  if (parentFiber.effectTag & ContentReset) {1230    // Reset the text content of the parent before doing any insertions1231    resetTextContent(parent);1232    // Clear ContentReset from the effect tag1233    parentFiber.effectTag &= ~ContentReset;1234  }1235  const before = getHostSibling(finishedWork);1236  // We only have the top Fiber that was inserted but we need to recurse down its1237  // children to find all the terminal nodes.1238  if (isContainer) {1239    insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);1240  } else {1241    insertOrAppendPlacementNode(finishedWork, before, parent);1242  }1243}1244function insertOrAppendPlacementNodeIntoContainer(1245  node: Fiber,1246  before: ?Instance,1247  parent: Container,1248): void {1249  const {tag} = node;1250  const isHost = tag === HostComponent || tag === HostText;1251  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1252    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1253    if (before) {1254      insertInContainerBefore(parent, stateNode, before);1255    } else {1256      appendChildToContainer(parent, stateNode);1257    }1258  } else if (tag === HostPortal) {1259    // If the insertion itself is a portal, then we don't want to traverse1260    // down its children. Instead, we'll get insertions from each child in1261    // the portal directly.1262  } else {1263    const child = node.child;1264    if (child !== null) {1265      insertOrAppendPlacementNodeIntoContainer(child, before, parent);1266      let sibling = child.sibling;1267      while (sibling !== null) {1268        insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);1269        sibling = sibling.sibling;1270      }1271    }1272  }1273}1274function insertOrAppendPlacementNode(1275  node: Fiber,1276  before: ?Instance,1277  parent: Instance,1278): void {1279  const {tag} = node;1280  const isHost = tag === HostComponent || tag === HostText;1281  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1282    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1283    if (before) {1284      insertBefore(parent, stateNode, before);1285    } else {1286      appendChild(parent, stateNode);1287    }1288  } else if (tag === HostPortal) {1289    // If the insertion itself is a portal, then we don't want to traverse1290    // down its children. Instead, we'll get insertions from each child in1291    // the portal directly.1292  } else {1293    const child = node.child;1294    if (child !== null) {1295      insertOrAppendPlacementNode(child, before, parent);1296      let sibling = child.sibling;1297      while (sibling !== null) {1298        insertOrAppendPlacementNode(sibling, before, parent);1299        sibling = sibling.sibling;1300      }1301    }1302  }1303}1304function unmountHostComponents(1305  finishedRoot,1306  current,1307  renderPriorityLevel,1308): void {1309  // We only have the top Fiber that was deleted but we need to recurse down its1310  // children to find all the terminal nodes.1311  let node: Fiber = current;1312  // Each iteration, currentParent is populated with node's host parent if not1313  // currentParentIsValid.1314  let currentParentIsValid = false;1315  // Note: these two variables *must* always be updated together.1316  let currentParent;1317  let currentParentIsContainer;1318  while (true) {1319    if (!currentParentIsValid) {1320      let parent = node.return;1321      findParent: while (true) {1322        invariant(1323          parent !== null,1324          'Expected to find a host parent. This error is likely caused by ' +1325            'a bug in React. Please file an issue.',1326        );1327        const parentStateNode = parent.stateNode;1328        switch (parent.tag) {1329          case HostComponent:1330            currentParent = parentStateNode;1331            currentParentIsContainer = false;1332            break findParent;1333          case HostRoot:1334            currentParent = parentStateNode.containerInfo;1335            currentParentIsContainer = true;1336            break findParent;1337          case HostPortal:1338            currentParent = parentStateNode.containerInfo;1339            currentParentIsContainer = true;1340            break findParent;1341          case FundamentalComponent:1342            if (enableFundamentalAPI) {1343              currentParent = parentStateNode.instance;1344              currentParentIsContainer = false;1345            }1346        }1347        parent = parent.return;1348      }1349      currentParentIsValid = true;1350    }1351    if (node.tag === HostComponent || node.tag === HostText) {1352      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1353      // After all the children have unmounted, it is now safe to remove the1354      // node from the tree.1355      if (currentParentIsContainer) {1356        removeChildFromContainer(1357          ((currentParent: any): Container),1358          (node.stateNode: Instance | TextInstance),1359        );1360      } else {1361        removeChild(1362          ((currentParent: any): Instance),1363          (node.stateNode: Instance | TextInstance),1364        );1365      }1366      // Don't visit children because we already visited them.1367    } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {1368      const fundamentalNode = node.stateNode.instance;1369      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1370      // After all the children have unmounted, it is now safe to remove the1371      // node from the tree.1372      if (currentParentIsContainer) {1373        removeChildFromContainer(1374          ((currentParent: any): Container),1375          (fundamentalNode: Instance),1376        );1377      } else {1378        removeChild(1379          ((currentParent: any): Instance),1380          (fundamentalNode: Instance),1381        );1382      }1383    } else if (1384      enableSuspenseServerRenderer &&1385      node.tag === DehydratedFragment1386    ) {1387      if (enableSuspenseCallback) {1388        const hydrationCallbacks = finishedRoot.hydrationCallbacks;1389        if (hydrationCallbacks !== null) {1390          const onDeleted = hydrationCallbacks.onDeleted;1391          if (onDeleted) {1392            onDeleted((node.stateNode: SuspenseInstance));1393          }1394        }1395      }1396      // Delete the dehydrated suspense boundary and all of its content.1397      if (currentParentIsContainer) {1398        clearSuspenseBoundaryFromContainer(1399          ((currentParent: any): Container),1400          (node.stateNode: SuspenseInstance),1401        );1402      } else {1403        clearSuspenseBoundary(1404          ((currentParent: any): Instance),1405          (node.stateNode: SuspenseInstance),1406        );1407      }1408    } else if (node.tag === HostPortal) {1409      if (node.child !== null) {1410        // When we go into a portal, it becomes the parent to remove from.1411        // We will reassign it back when we pop the portal on the way up.1412        currentParent = node.stateNode.containerInfo;1413        currentParentIsContainer = true;1414        // Visit children because portals might contain host components.1415        node.child.return = node;1416        node = node.child;1417        continue;1418      }1419    } else {1420      commitUnmount(finishedRoot, node, renderPriorityLevel);1421      // Visit children because we may find more host components below.1422      if (node.child !== null) {1423        node.child.return = node;1424        node = node.child;1425        continue;1426      }1427    }1428    if (node === current) {1429      return;1430    }1431    while (node.sibling === null) {1432      if (node.return === null || node.return === current) {1433        return;1434      }1435      node = node.return;1436      if (node.tag === HostPortal) {1437        // When we go out of the portal, we need to restore the parent.1438        // Since we don't keep a stack of them, we will search for it.1439        currentParentIsValid = false;1440      }1441    }1442    node.sibling.return = node.return;1443    node = node.sibling;1444  }1445}1446function commitDeletion(1447  finishedRoot: FiberRoot,1448  current: Fiber,1449  renderPriorityLevel: ReactPriorityLevel,1450): void {1451  if (supportsMutation) {1452    // Recursively delete all host nodes from the parent.1453    // Detach refs and call componentWillUnmount() on the whole subtree.1454    unmountHostComponents(finishedRoot, current, renderPriorityLevel);1455  } else {1456    // Detach refs and call componentWillUnmount() on the whole subtree.1457    commitNestedUnmounts(finishedRoot, current, renderPriorityLevel);1458  }1459  detachFiber(current);1460}1461function commitWork(current: Fiber | null, finishedWork: Fiber): void {1462  if (!supportsMutation) {1463    switch (finishedWork.tag) {1464      case FunctionComponent:1465      case ForwardRef:1466      case MemoComponent:1467      case SimpleMemoComponent:1468      case Block: {1469        // Layout effects are destroyed during the mutation phase so that all1470        // destroy functions for all fibers are called before any create functions.1471        // This prevents sibling component effects from interfering with each other,1472        // e.g. a destroy function in one component should never override a ref set1473        // by a create function in another component during the same commit.1474        if (1475          enableProfilerTimer &&1476          enableProfilerCommitHooks &&1477          finishedWork.mode & ProfileMode1478        ) {1479          try {1480            startLayoutEffectTimer();1481            commitHookEffectListUnmount(1482              HookLayout | HookHasEffect,1483              finishedWork,1484            );1485          } finally {1486            recordLayoutEffectDuration(finishedWork);1487          }1488        } else {1489          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1490        }1491        return;1492      }1493      case Profiler: {1494        return;1495      }1496      case SuspenseComponent: {1497        commitSuspenseComponent(finishedWork);1498        attachSuspenseRetryListeners(finishedWork);1499        return;1500      }1501      case SuspenseListComponent: {1502        attachSuspenseRetryListeners(finishedWork);1503        return;1504      }1505      case HostRoot: {1506        if (supportsHydration) {1507          const root: FiberRoot = finishedWork.stateNode;1508          if (root.hydrate) {1509            // We've just hydrated. No need to hydrate again.1510            root.hydrate = false;1511            commitHydratedContainer(root.containerInfo);1512          }1513        }1514        break;1515      }1516    }1517    commitContainer(finishedWork);1518    return;1519  }1520  switch (finishedWork.tag) {1521    case FunctionComponent:1522    case ForwardRef:1523    case MemoComponent:1524    case SimpleMemoComponent:1525    case Block: {1526      // Layout effects are destroyed during the mutation phase so that all1527      // destroy functions for all fibers are called before any create functions.1528      // This prevents sibling component effects from interfering with each other,1529      // e.g. a destroy function in one component should never override a ref set1530      // by a create function in another component during the same commit.1531      if (1532        enableProfilerTimer &&1533        enableProfilerCommitHooks &&1534        finishedWork.mode & ProfileMode1535      ) {1536        try {1537          startLayoutEffectTimer();1538          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1539        } finally {1540          recordLayoutEffectDuration(finishedWork);1541        }1542      } else {1543        commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1544      }1545      return;1546    }1547    case ClassComponent: {1548      return;1549    }1550    case HostComponent: {1551      const instance: Instance = finishedWork.stateNode;1552      if (instance != null) {1553        // Commit the work prepared earlier.1554        const newProps = finishedWork.memoizedProps;1555        // For hydration we reuse the update path but we treat the oldProps1556        // as the newProps. The updatePayload will contain the real change in1557        // this case.1558        const oldProps = current !== null ? current.memoizedProps : newProps;1559        const type = finishedWork.type;1560        // TODO: Type the updateQueue to be specific to host components.1561        const updatePayload: null | UpdatePayload = (finishedWork.updateQueue: any);1562        finishedWork.updateQueue = null;1563        if (updatePayload !== null) {1564          commitUpdate(1565            instance,1566            updatePayload,1567            type,1568            oldProps,1569            newProps,1570            finishedWork,1571          );1572        }1573        if (enableDeprecatedFlareAPI) {1574          const prevListeners = oldProps.DEPRECATED_flareListeners;1575          const nextListeners = newProps.DEPRECATED_flareListeners;1576          if (prevListeners !== nextListeners) {1577            updateDeprecatedEventListeners(nextListeners, finishedWork, null);1578          }1579        }1580      }1581      return;1582    }1583    case HostText: {1584      invariant(1585        finishedWork.stateNode !== null,1586        'This should have a text node initialized. This error is likely ' +1587          'caused by a bug in React. Please file an issue.',1588      );1589      const textInstance: TextInstance = finishedWork.stateNode;1590      const newText: string = finishedWork.memoizedProps;1591      // For hydration we reuse the update path but we treat the oldProps1592      // as the newProps. The updatePayload will contain the real change in1593      // this case.1594      const oldText: string =1595        current !== null ? current.memoizedProps : newText;1596      commitTextUpdate(textInstance, oldText, newText);1597      return;1598    }1599    case HostRoot: {1600      if (supportsHydration) {1601        const root: FiberRoot = finishedWork.stateNode;1602        if (root.hydrate) {1603          // We've just hydrated. No need to hydrate again.1604          root.hydrate = false;1605          commitHydratedContainer(root.containerInfo);1606        }1607      }1608      return;1609    }1610    case Profiler: {1611      return;1612    }1613    case SuspenseComponent: {1614      commitSuspenseComponent(finishedWork);1615      attachSuspenseRetryListeners(finishedWork);1616      return;1617    }1618    case SuspenseListComponent: {1619      attachSuspenseRetryListeners(finishedWork);1620      return;1621    }1622    case IncompleteClassComponent: {1623      return;1624    }1625    case FundamentalComponent: {1626      if (enableFundamentalAPI) {1627        const fundamentalInstance = finishedWork.stateNode;1628        updateFundamentalComponent(fundamentalInstance);1629        return;1630      }1631      break;1632    }1633    case ScopeComponent: {1634      if (enableScopeAPI) {1635        const scopeInstance = finishedWork.stateNode;1636        scopeInstance.fiber = finishedWork;1637        if (enableDeprecatedFlareAPI) {1638          const newProps = finishedWork.memoizedProps;1639          const oldProps = current !== null ? current.memoizedProps : newProps;1640          const prevListeners = oldProps.DEPRECATED_flareListeners;1641          const nextListeners = newProps.DEPRECATED_flareListeners;1642          if (prevListeners !== nextListeners || current === null) {1643            updateDeprecatedEventListeners(nextListeners, finishedWork, null);1644          }1645        }1646        return;1647      }1648      break;1649    }1650  }1651  invariant(1652    false,1653    'This unit of work tag should not have side-effects. This error is ' +1654      'likely caused by a bug in React. Please file an issue.',1655  );1656}1657function commitSuspenseComponent(finishedWork: Fiber) {1658  const newState: SuspenseState | null = finishedWork.memoizedState;1659  let newDidTimeout;1660  let primaryChildParent = finishedWork;1661  if (newState === null) {1662    newDidTimeout = false;1663  } else {1664    newDidTimeout = true;1665    primaryChildParent = finishedWork.child;1666    markCommitTimeOfFallback();1667  }1668  if (supportsMutation && primaryChildParent !== null) {1669    hideOrUnhideAllChildren(primaryChildParent, newDidTimeout);1670  }1671  if (enableSuspenseCallback && newState !== null) {1672    const suspenseCallback = finishedWork.memoizedProps.suspenseCallback;1673    if (typeof suspenseCallback === 'function') {1674      const wakeables: Set<Wakeable> | null = (finishedWork.updateQueue: any);1675      if (wakeables !== null) {1676        suspenseCallback(new Set(wakeables));1677      }1678    } else if (__DEV__) {1679      if (suspenseCallback !== undefined) {1680        console.error('Unexpected type for suspenseCallback.');1681      }1682    }1683  }1684}1685function commitSuspenseHydrationCallbacks(1686  finishedRoot: FiberRoot,1687  finishedWork: Fiber,1688) {1689  if (!supportsHydration) {1690    return;1691  }1692  const newState: SuspenseState | null = finishedWork.memoizedState;1693  if (newState === null) {1694    const current = finishedWork.alternate;1695    if (current !== null) {1696      const prevState: SuspenseState | null = current.memoizedState;1697      if (prevState !== null) {1698        const suspenseInstance = prevState.dehydrated;1699        if (suspenseInstance !== null) {1700          commitHydratedSuspenseInstance(suspenseInstance);1701          if (enableSuspenseCallback) {1702            const hydrationCallbacks = finishedRoot.hydrationCallbacks;1703            if (hydrationCallbacks !== null) {1704              const onHydrated = hydrationCallbacks.onHydrated;1705              if (onHydrated) {1706                onHydrated(suspenseInstance);1707              }1708            }1709          }1710        }1711      }1712    }1713  }1714}1715function attachSuspenseRetryListeners(finishedWork: Fiber) {1716  // If this boundary just timed out, then it will have a set of wakeables.1717  // For each wakeable, attach a listener so that when it resolves, React1718  // attempts to re-render the boundary in the primary (pre-timeout) state.1719  const wakeables: Set<Wakeable> | null = (finishedWork.updateQueue: any);1720  if (wakeables !== null) {1721    finishedWork.updateQueue = null;1722    let retryCache = finishedWork.stateNode;1723    if (retryCache === null) {1724      retryCache = finishedWork.stateNode = new PossiblyWeakSet();1725    }1726    wakeables.forEach(wakeable => {1727      // Memoize using the boundary fiber to prevent redundant listeners.1728      let retry = resolveRetryWakeable.bind(null, finishedWork, wakeable);1729      if (!retryCache.has(wakeable)) {1730        if (enableSchedulerTracing) {1731          if (wakeable.__reactDoNotTraceInteractions !== true) {1732            retry = Schedule_tracing_wrap(retry);1733          }1734        }1735        retryCache.add(wakeable);1736        wakeable.then(retry, retry);1737      }1738    });1739  }1740}1741function commitResetTextContent(current: Fiber) {1742  if (!supportsMutation) {1743    return;1744  }1745  resetTextContent(current.stateNode);1746}1747export {1748  commitBeforeMutationLifeCycles,1749  commitResetTextContent,1750  commitPlacement,1751  commitDeletion,1752  commitWork,1753  commitLifeCycles,1754  commitAttachRef,1755  commitDetachRef,...

ReactFiberCommitWork.new.js

Source:ReactFiberCommitWork.new.js

1/**2 * Copyright (c) Facebook, Inc. and its affiliates.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 * @flow8 */9import type {10  Instance,11  TextInstance,12  SuspenseInstance,13  Container,14  ChildSet,15  UpdatePayload,16} from './ReactFiberHostConfig';17import type {Fiber} from './ReactInternalTypes';18import type {FiberRoot} from './ReactInternalTypes';19import type {Lanes} from './ReactFiberLane.new';20import type {SuspenseState} from './ReactFiberSuspenseComponent.new';21import type {UpdateQueue} from './ReactUpdateQueue.new';22import type {FunctionComponentUpdateQueue} from './ReactFiberHooks.new';23import type {Wakeable} from 'shared/ReactTypes';24import type {ReactPriorityLevel} from './ReactInternalTypes';25import type {OffscreenState} from './ReactFiberOffscreenComponent';26import {unstable_wrap as Schedule_tracing_wrap} from 'scheduler/tracing';27import {28  enableSchedulerTracing,29  enableProfilerTimer,30  enableProfilerCommitHooks,31  enableProfilerNestedUpdatePhase,32  enableSuspenseServerRenderer,33  enableFundamentalAPI,34  enableSuspenseCallback,35  enableScopeAPI,36} from 'shared/ReactFeatureFlags';37import {38  FunctionComponent,39  ForwardRef,40  ClassComponent,41  HostRoot,42  HostComponent,43  HostText,44  HostPortal,45  Profiler,46  SuspenseComponent,47  DehydratedFragment,48  IncompleteClassComponent,49  MemoComponent,50  SimpleMemoComponent,51  SuspenseListComponent,52  FundamentalComponent,53  ScopeComponent,54  OffscreenComponent,55  LegacyHiddenComponent,56} from './ReactWorkTags';57import {58  invokeGuardedCallback,59  hasCaughtError,60  clearCaughtError,61} from 'shared/ReactErrorUtils';62import {63  NoFlags,64  ContentReset,65  Placement,66  Snapshot,67  Update,68} from './ReactFiberFlags';69import getComponentName from 'shared/getComponentName';70import invariant from 'shared/invariant';71import {onCommitUnmount} from './ReactFiberDevToolsHook.new';72import {resolveDefaultProps} from './ReactFiberLazyComponent.new';73import {74  isCurrentUpdateNested,75  getCommitTime,76  recordLayoutEffectDuration,77  startLayoutEffectTimer,78} from './ReactProfilerTimer.new';79import {ProfileMode} from './ReactTypeOfMode';80import {commitUpdateQueue} from './ReactUpdateQueue.new';81import {82  getPublicInstance,83  supportsMutation,84  supportsPersistence,85  supportsHydration,86  commitMount,87  commitUpdate,88  resetTextContent,89  commitTextUpdate,90  appendChild,91  appendChildToContainer,92  insertBefore,93  insertInContainerBefore,94  removeChild,95  removeChildFromContainer,96  clearSuspenseBoundary,97  clearSuspenseBoundaryFromContainer,98  replaceContainerChildren,99  createContainerChildSet,100  hideInstance,101  hideTextInstance,102  unhideInstance,103  unhideTextInstance,104  unmountFundamentalComponent,105  updateFundamentalComponent,106  commitHydratedContainer,107  commitHydratedSuspenseInstance,108  clearContainer,109  prepareScopeUpdate,110} from './ReactFiberHostConfig';111import {112  captureCommitPhaseError,113  resolveRetryWakeable,114  markCommitTimeOfFallback,115  enqueuePendingPassiveHookEffectMount,116  enqueuePendingPassiveHookEffectUnmount,117  enqueuePendingPassiveProfilerEffect,118} from './ReactFiberWorkLoop.new';119import {120  NoFlags as NoHookEffect,121  HasEffect as HookHasEffect,122  Layout as HookLayout,123  Passive as HookPassive,124} from './ReactHookEffectTags';125import {didWarnAboutReassigningProps} from './ReactFiberBeginWork.new';126let didWarnAboutUndefinedSnapshotBeforeUpdate: Set<mixed> | null = null;127if (__DEV__) {128  didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();129}130const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;131const callComponentWillUnmountWithTimer = function(current, instance) {132  instance.props = current.memoizedProps;133  instance.state = current.memoizedState;134  if (135    enableProfilerTimer &&136    enableProfilerCommitHooks &&137    current.mode & ProfileMode138  ) {139    try {140      startLayoutEffectTimer();141      instance.componentWillUnmount();142    } finally {143      recordLayoutEffectDuration(current);144    }145  } else {146    instance.componentWillUnmount();147  }148};149// Capture errors so they don't interrupt unmounting.150function safelyCallComponentWillUnmount(current: Fiber, instance: any) {151  if (__DEV__) {152    invokeGuardedCallback(153      null,154      callComponentWillUnmountWithTimer,155      null,156      current,157      instance,158    );159    if (hasCaughtError()) {160      const unmountError = clearCaughtError();161      captureCommitPhaseError(current, unmountError);162    }163  } else {164    try {165      callComponentWillUnmountWithTimer(current, instance);166    } catch (unmountError) {167      captureCommitPhaseError(current, unmountError);168    }169  }170}171function safelyDetachRef(current: Fiber) {172  const ref = current.ref;173  if (ref !== null) {174    if (typeof ref === 'function') {175      if (__DEV__) {176        if (177          enableProfilerTimer &&178          enableProfilerCommitHooks &&179          current.mode & ProfileMode180        ) {181          startLayoutEffectTimer();182          invokeGuardedCallback(null, ref, null, null);183          recordLayoutEffectDuration(current);184        } else {185          invokeGuardedCallback(null, ref, null, null);186        }187        if (hasCaughtError()) {188          const refError = clearCaughtError();189          captureCommitPhaseError(current, refError);190        }191      } else {192        try {193          if (194            enableProfilerTimer &&195            enableProfilerCommitHooks &&196            current.mode & ProfileMode197          ) {198            try {199              startLayoutEffectTimer();200              ref(null);201            } finally {202              recordLayoutEffectDuration(current);203            }204          } else {205            ref(null);206          }207        } catch (refError) {208          captureCommitPhaseError(current, refError);209        }210      }211    } else {212      ref.current = null;213    }214  }215}216function safelyCallDestroy(current: Fiber, destroy: () => void) {217  if (__DEV__) {218    invokeGuardedCallback(null, destroy, null);219    if (hasCaughtError()) {220      const error = clearCaughtError();221      captureCommitPhaseError(current, error);222    }223  } else {224    try {225      destroy();226    } catch (error) {227      captureCommitPhaseError(current, error);228    }229  }230}231function commitBeforeMutationLifeCycles(232  current: Fiber | null,233  finishedWork: Fiber,234): void {235  switch (finishedWork.tag) {236    case FunctionComponent:237    case ForwardRef:238    case SimpleMemoComponent: {239      return;240    }241    case ClassComponent: {242      if (finishedWork.flags & Snapshot) {243        if (current !== null) {244          const prevProps = current.memoizedProps;245          const prevState = current.memoizedState;246          const instance = finishedWork.stateNode;247          // We could update instance props and state here,248          // but instead we rely on them being set during last render.249          // TODO: revisit this when we implement resuming.250          if (__DEV__) {251            if (252              finishedWork.type === finishedWork.elementType &&253              !didWarnAboutReassigningProps254            ) {255              if (instance.props !== finishedWork.memoizedProps) {256                console.error(257                  'Expected %s props to match memoized props before ' +258                    'getSnapshotBeforeUpdate. ' +259                    'This might either be because of a bug in React, or because ' +260                    'a component reassigns its own `this.props`. ' +261                    'Please file an issue.',262                  getComponentName(finishedWork.type) || 'instance',263                );264              }265              if (instance.state !== finishedWork.memoizedState) {266                console.error(267                  'Expected %s state to match memoized state before ' +268                    'getSnapshotBeforeUpdate. ' +269                    'This might either be because of a bug in React, or because ' +270                    'a component reassigns its own `this.state`. ' +271                    'Please file an issue.',272                  getComponentName(finishedWork.type) || 'instance',273                );274              }275            }276          }277          const snapshot = instance.getSnapshotBeforeUpdate(278            finishedWork.elementType === finishedWork.type279              ? prevProps280              : resolveDefaultProps(finishedWork.type, prevProps),281            prevState,282          );283          if (__DEV__) {284            const didWarnSet = ((didWarnAboutUndefinedSnapshotBeforeUpdate: any): Set<mixed>);285            if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {286              didWarnSet.add(finishedWork.type);287              console.error(288                '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' +289                  'must be returned. You have returned undefined.',290                getComponentName(finishedWork.type),291              );292            }293          }294          instance.__reactInternalSnapshotBeforeUpdate = snapshot;295        }296      }297      return;298    }299    case HostRoot: {300      if (supportsMutation) {301        if (finishedWork.flags & Snapshot) {302          const root = finishedWork.stateNode;303          clearContainer(root.containerInfo);304        }305      }306      return;307    }308    case HostComponent:309    case HostText:310    case HostPortal:311    case IncompleteClassComponent:312      // Nothing to do for these component types313      return;314  }315  invariant(316    false,317    'This unit of work tag should not have side-effects. This error is ' +318      'likely caused by a bug in React. Please file an issue.',319  );320}321function commitHookEffectListUnmount(tag: number, finishedWork: Fiber) {322  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);323  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;324  if (lastEffect !== null) {325    const firstEffect = lastEffect.next;326    let effect = firstEffect;327    do {328      if ((effect.tag & tag) === tag) {329        // Unmount330        const destroy = effect.destroy;331        effect.destroy = undefined;332        if (destroy !== undefined) {333          destroy();334        }335      }336      effect = effect.next;337    } while (effect !== firstEffect);338  }339}340function commitHookEffectListMount(tag: number, finishedWork: Fiber) {341  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);342  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;343  if (lastEffect !== null) {344    const firstEffect = lastEffect.next;345    let effect = firstEffect;346    do {347      if ((effect.tag & tag) === tag) {348        // Mount349        const create = effect.create;350        effect.destroy = create();351        if (__DEV__) {352          const destroy = effect.destroy;353          if (destroy !== undefined && typeof destroy !== 'function') {354            let addendum;355            if (destroy === null) {356              addendum =357                ' You returned null. If your effect does not require clean ' +358                'up, return undefined (or nothing).';359            } else if (typeof destroy.then === 'function') {360              addendum =361                '\n\nIt looks like you wrote useEffect(async () => ...) or returned a Promise. ' +362                'Instead, write the async function inside your effect ' +363                'and call it immediately:\n\n' +364                'useEffect(() => {\n' +365                '  async function fetchData() {\n' +366                '    // You can await here\n' +367                '    const response = await MyAPI.getData(someId);\n' +368                '    // ...\n' +369                '  }\n' +370                '  fetchData();\n' +371                `}, [someId]); // Or [] if effect doesn't need props or state\n\n` +372                'Learn more about data fetching with Hooks: https://reactjs.org/link/hooks-data-fetching';373            } else {374              addendum = ' You returned: ' + destroy;375            }376            console.error(377              'An effect function must not return anything besides a function, ' +378                'which is used for clean-up.%s',379              addendum,380            );381          }382        }383      }384      effect = effect.next;385    } while (effect !== firstEffect);386  }387}388function schedulePassiveEffects(finishedWork: Fiber) {389  const updateQueue: FunctionComponentUpdateQueue | null = (finishedWork.updateQueue: any);390  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;391  if (lastEffect !== null) {392    const firstEffect = lastEffect.next;393    let effect = firstEffect;394    do {395      const {next, tag} = effect;396      if (397        (tag & HookPassive) !== NoHookEffect &&398        (tag & HookHasEffect) !== NoHookEffect399      ) {400        enqueuePendingPassiveHookEffectUnmount(finishedWork, effect);401        enqueuePendingPassiveHookEffectMount(finishedWork, effect);402      }403      effect = next;404    } while (effect !== firstEffect);405  }406}407export function commitPassiveEffectDurations(408  finishedRoot: FiberRoot,409  finishedWork: Fiber,410): void {411  if (enableProfilerTimer && enableProfilerCommitHooks) {412    // Only Profilers with work in their subtree will have an Update effect scheduled.413    if ((finishedWork.flags & Update) !== NoFlags) {414      switch (finishedWork.tag) {415        case Profiler: {416          const {passiveEffectDuration} = finishedWork.stateNode;417          const {id, onPostCommit} = finishedWork.memoizedProps;418          // This value will still reflect the previous commit phase.419          // It does not get reset until the start of the next commit phase.420          const commitTime = getCommitTime();421          let phase = finishedWork.alternate === null ? 'mount' : 'update';422          if (enableProfilerNestedUpdatePhase) {423            if (isCurrentUpdateNested()) {424              phase = 'nested-update';425            }426          }427          if (typeof onPostCommit === 'function') {428            if (enableSchedulerTracing) {429              onPostCommit(430                id,431                phase,432                passiveEffectDuration,433                commitTime,434                finishedRoot.memoizedInteractions,435              );436            } else {437              onPostCommit(id, phase, passiveEffectDuration, commitTime);438            }439          }440          // Bubble times to the next nearest ancestor Profiler.441          // After we process that Profiler, we'll bubble further up.442          let parentFiber = finishedWork.return;443          while (parentFiber !== null) {444            if (parentFiber.tag === Profiler) {445              const parentStateNode = parentFiber.stateNode;446              parentStateNode.passiveEffectDuration += passiveEffectDuration;447              break;448            }449            parentFiber = parentFiber.return;450          }451          break;452        }453        default:454          break;455      }456    }457  }458}459function commitLifeCycles(460  finishedRoot: FiberRoot,461  current: Fiber | null,462  finishedWork: Fiber,463  committedLanes: Lanes,464): void {465  switch (finishedWork.tag) {466    case FunctionComponent:467    case ForwardRef:468    case SimpleMemoComponent: {469      // At this point layout effects have already been destroyed (during mutation phase).470      // This is done to prevent sibling component effects from interfering with each other,471      // e.g. a destroy function in one component should never override a ref set472      // by a create function in another component during the same commit.473      if (474        enableProfilerTimer &&475        enableProfilerCommitHooks &&476        finishedWork.mode & ProfileMode477      ) {478        try {479          startLayoutEffectTimer();480          commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);481        } finally {482          recordLayoutEffectDuration(finishedWork);483        }484      } else {485        commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);486      }487      schedulePassiveEffects(finishedWork);488      return;489    }490    case ClassComponent: {491      const instance = finishedWork.stateNode;492      if (finishedWork.flags & Update) {493        if (current === null) {494          // We could update instance props and state here,495          // but instead we rely on them being set during last render.496          // TODO: revisit this when we implement resuming.497          if (__DEV__) {498            if (499              finishedWork.type === finishedWork.elementType &&500              !didWarnAboutReassigningProps501            ) {502              if (instance.props !== finishedWork.memoizedProps) {503                console.error(504                  'Expected %s props to match memoized props before ' +505                    'componentDidMount. ' +506                    'This might either be because of a bug in React, or because ' +507                    'a component reassigns its own `this.props`. ' +508                    'Please file an issue.',509                  getComponentName(finishedWork.type) || 'instance',510                );511              }512              if (instance.state !== finishedWork.memoizedState) {513                console.error(514                  'Expected %s state to match memoized state before ' +515                    'componentDidMount. ' +516                    'This might either be because of a bug in React, or because ' +517                    'a component reassigns its own `this.state`. ' +518                    'Please file an issue.',519                  getComponentName(finishedWork.type) || 'instance',520                );521              }522            }523          }524          if (525            enableProfilerTimer &&526            enableProfilerCommitHooks &&527            finishedWork.mode & ProfileMode528          ) {529            try {530              startLayoutEffectTimer();531              instance.componentDidMount();532            } finally {533              recordLayoutEffectDuration(finishedWork);534            }535          } else {536            instance.componentDidMount();537          }538        } else {539          const prevProps =540            finishedWork.elementType === finishedWork.type541              ? current.memoizedProps542              : resolveDefaultProps(finishedWork.type, current.memoizedProps);543          const prevState = current.memoizedState;544          // We could update instance props and state here,545          // but instead we rely on them being set during last render.546          // TODO: revisit this when we implement resuming.547          if (__DEV__) {548            if (549              finishedWork.type === finishedWork.elementType &&550              !didWarnAboutReassigningProps551            ) {552              if (instance.props !== finishedWork.memoizedProps) {553                console.error(554                  'Expected %s props to match memoized props before ' +555                    'componentDidUpdate. ' +556                    'This might either be because of a bug in React, or because ' +557                    'a component reassigns its own `this.props`. ' +558                    'Please file an issue.',559                  getComponentName(finishedWork.type) || 'instance',560                );561              }562              if (instance.state !== finishedWork.memoizedState) {563                console.error(564                  'Expected %s state to match memoized state before ' +565                    'componentDidUpdate. ' +566                    'This might either be because of a bug in React, or because ' +567                    'a component reassigns its own `this.state`. ' +568                    'Please file an issue.',569                  getComponentName(finishedWork.type) || 'instance',570                );571              }572            }573          }574          if (575            enableProfilerTimer &&576            enableProfilerCommitHooks &&577            finishedWork.mode & ProfileMode578          ) {579            try {580              startLayoutEffectTimer();581              instance.componentDidUpdate(582                prevProps,583                prevState,584                instance.__reactInternalSnapshotBeforeUpdate,585              );586            } finally {587              recordLayoutEffectDuration(finishedWork);588            }589          } else {590            instance.componentDidUpdate(591              prevProps,592              prevState,593              instance.__reactInternalSnapshotBeforeUpdate,594            );595          }596        }597      }598      // TODO: I think this is now always non-null by the time it reaches the599      // commit phase. Consider removing the type check.600      const updateQueue: UpdateQueue<601        *,602      > | null = (finishedWork.updateQueue: any);603      if (updateQueue !== null) {604        if (__DEV__) {605          if (606            finishedWork.type === finishedWork.elementType &&607            !didWarnAboutReassigningProps608          ) {609            if (instance.props !== finishedWork.memoizedProps) {610              console.error(611                'Expected %s props to match memoized props before ' +612                  'processing the update queue. ' +613                  'This might either be because of a bug in React, or because ' +614                  'a component reassigns its own `this.props`. ' +615                  'Please file an issue.',616                getComponentName(finishedWork.type) || 'instance',617              );618            }619            if (instance.state !== finishedWork.memoizedState) {620              console.error(621                'Expected %s state to match memoized state before ' +622                  'processing the update queue. ' +623                  'This might either be because of a bug in React, or because ' +624                  'a component reassigns its own `this.state`. ' +625                  'Please file an issue.',626                getComponentName(finishedWork.type) || 'instance',627              );628            }629          }630        }631        // We could update instance props and state here,632        // but instead we rely on them being set during last render.633        // TODO: revisit this when we implement resuming.634        commitUpdateQueue(finishedWork, updateQueue, instance);635      }636      return;637    }638    case HostRoot: {639      // TODO: I think this is now always non-null by the time it reaches the640      // commit phase. Consider removing the type check.641      const updateQueue: UpdateQueue<642        *,643      > | null = (finishedWork.updateQueue: any);644      if (updateQueue !== null) {645        let instance = null;646        if (finishedWork.child !== null) {647          switch (finishedWork.child.tag) {648            case HostComponent:649              instance = getPublicInstance(finishedWork.child.stateNode);650              break;651            case ClassComponent:652              instance = finishedWork.child.stateNode;653              break;654          }655        }656        commitUpdateQueue(finishedWork, updateQueue, instance);657      }658      return;659    }660    case HostComponent: {661      const instance: Instance = finishedWork.stateNode;662      // Renderers may schedule work to be done after host components are mounted663      // (eg DOM renderer may schedule auto-focus for inputs and form controls).664      // These effects should only be committed when components are first mounted,665      // aka when there is no current/alternate.666      if (current === null && finishedWork.flags & Update) {667        const type = finishedWork.type;668        const props = finishedWork.memoizedProps;669        commitMount(instance, type, props, finishedWork);670      }671      return;672    }673    case HostText: {674      // We have no life-cycles associated with text.675      return;676    }677    case HostPortal: {678      // We have no life-cycles associated with portals.679      return;680    }681    case Profiler: {682      if (enableProfilerTimer) {683        const {onCommit, onRender} = finishedWork.memoizedProps;684        const {effectDuration} = finishedWork.stateNode;685        const commitTime = getCommitTime();686        let phase = current === null ? 'mount' : 'update';687        if (enableProfilerNestedUpdatePhase) {688          if (isCurrentUpdateNested()) {689            phase = 'nested-update';690          }691        }692        if (typeof onRender === 'function') {693          if (enableSchedulerTracing) {694            onRender(695              finishedWork.memoizedProps.id,696              phase,697              finishedWork.actualDuration,698              finishedWork.treeBaseDuration,699              finishedWork.actualStartTime,700              commitTime,701              finishedRoot.memoizedInteractions,702            );703          } else {704            onRender(705              finishedWork.memoizedProps.id,706              phase,707              finishedWork.actualDuration,708              finishedWork.treeBaseDuration,709              finishedWork.actualStartTime,710              commitTime,711            );712          }713        }714        if (enableProfilerCommitHooks) {715          if (typeof onCommit === 'function') {716            if (enableSchedulerTracing) {717              onCommit(718                finishedWork.memoizedProps.id,719                phase,720                effectDuration,721                commitTime,722                finishedRoot.memoizedInteractions,723              );724            } else {725              onCommit(726                finishedWork.memoizedProps.id,727                phase,728                effectDuration,729                commitTime,730              );731            }732          }733          // Schedule a passive effect for this Profiler to call onPostCommit hooks.734          // This effect should be scheduled even if there is no onPostCommit callback for this Profiler,735          // because the effect is also where times bubble to parent Profilers.736          enqueuePendingPassiveProfilerEffect(finishedWork);737          // Propagate layout effect durations to the next nearest Profiler ancestor.738          // Do not reset these values until the next render so DevTools has a chance to read them first.739          let parentFiber = finishedWork.return;740          while (parentFiber !== null) {741            if (parentFiber.tag === Profiler) {742              const parentStateNode = parentFiber.stateNode;743              parentStateNode.effectDuration += effectDuration;744              break;745            }746            parentFiber = parentFiber.return;747          }748        }749      }750      return;751    }752    case SuspenseComponent: {753      commitSuspenseHydrationCallbacks(finishedRoot, finishedWork);754      return;755    }756    case SuspenseListComponent:757    case IncompleteClassComponent:758    case FundamentalComponent:759    case ScopeComponent:760    case OffscreenComponent:761    case LegacyHiddenComponent:762      return;763  }764  invariant(765    false,766    'This unit of work tag should not have side-effects. This error is ' +767      'likely caused by a bug in React. Please file an issue.',768  );769}770function hideOrUnhideAllChildren(finishedWork, isHidden) {771  if (supportsMutation) {772    // We only have the top Fiber that was inserted but we need to recurse down its773    // children to find all the terminal nodes.774    let node: Fiber = finishedWork;775    while (true) {776      if (node.tag === HostComponent) {777        const instance = node.stateNode;778        if (isHidden) {779          hideInstance(instance);780        } else {781          unhideInstance(node.stateNode, node.memoizedProps);782        }783      } else if (node.tag === HostText) {784        const instance = node.stateNode;785        if (isHidden) {786          hideTextInstance(instance);787        } else {788          unhideTextInstance(instance, node.memoizedProps);789        }790      } else if (791        (node.tag === OffscreenComponent ||792          node.tag === LegacyHiddenComponent) &&793        (node.memoizedState: OffscreenState) !== null &&794        node !== finishedWork795      ) {796        // Found a nested Offscreen component that is hidden. Don't search797        // any deeper. This tree should remain hidden.798      } else if (node.child !== null) {799        node.child.return = node;800        node = node.child;801        continue;802      }803      if (node === finishedWork) {804        return;805      }806      while (node.sibling === null) {807        if (node.return === null || node.return === finishedWork) {808          return;809        }810        node = node.return;811      }812      node.sibling.return = node.return;813      node = node.sibling;814    }815  }816}817function commitAttachRef(finishedWork: Fiber) {818  const ref = finishedWork.ref;819  if (ref !== null) {820    const instance = finishedWork.stateNode;821    let instanceToUse;822    switch (finishedWork.tag) {823      case HostComponent:824        instanceToUse = getPublicInstance(instance);825        break;826      default:827        instanceToUse = instance;828    }829    // Moved outside to ensure DCE works with this flag830    if (enableScopeAPI && finishedWork.tag === ScopeComponent) {831      instanceToUse = instance;832    }833    if (typeof ref === 'function') {834      if (835        enableProfilerTimer &&836        enableProfilerCommitHooks &&837        finishedWork.mode & ProfileMode838      ) {839        try {840          startLayoutEffectTimer();841          ref(instanceToUse);842        } finally {843          recordLayoutEffectDuration(finishedWork);844        }845      } else {846        ref(instanceToUse);847      }848    } else {849      if (__DEV__) {850        if (!ref.hasOwnProperty('current')) {851          console.error(852            'Unexpected ref object provided for %s. ' +853              'Use either a ref-setter function or React.createRef().',854            getComponentName(finishedWork.type),855          );856        }857      }858      ref.current = instanceToUse;859    }860  }861}862function commitDetachRef(current: Fiber) {863  const currentRef = current.ref;864  if (currentRef !== null) {865    if (typeof currentRef === 'function') {866      if (867        enableProfilerTimer &&868        enableProfilerCommitHooks &&869        current.mode & ProfileMode870      ) {871        try {872          startLayoutEffectTimer();873          currentRef(null);874        } finally {875          recordLayoutEffectDuration(current);876        }877      } else {878        currentRef(null);879      }880    } else {881      currentRef.current = null;882    }883  }884}885// User-originating errors (lifecycles and refs) should not interrupt886// deletion, so don't let them throw. Host-originating errors should887// interrupt deletion, so it's okay888function commitUnmount(889  finishedRoot: FiberRoot,890  current: Fiber,891  renderPriorityLevel: ReactPriorityLevel,892): void {893  onCommitUnmount(current);894  switch (current.tag) {895    case FunctionComponent:896    case ForwardRef:897    case MemoComponent:898    case SimpleMemoComponent: {899      const updateQueue: FunctionComponentUpdateQueue | null = (current.updateQueue: any);900      if (updateQueue !== null) {901        const lastEffect = updateQueue.lastEffect;902        if (lastEffect !== null) {903          const firstEffect = lastEffect.next;904          let effect = firstEffect;905          do {906            const {destroy, tag} = effect;907            if (destroy !== undefined) {908              if ((tag & HookPassive) !== NoHookEffect) {909                enqueuePendingPassiveHookEffectUnmount(current, effect);910              } else {911                if (912                  enableProfilerTimer &&913                  enableProfilerCommitHooks &&914                  current.mode & ProfileMode915                ) {916                  startLayoutEffectTimer();917                  safelyCallDestroy(current, destroy);918                  recordLayoutEffectDuration(current);919                } else {920                  safelyCallDestroy(current, destroy);921                }922              }923            }924            effect = effect.next;925          } while (effect !== firstEffect);926        }927      }928      return;929    }930    case ClassComponent: {931      safelyDetachRef(current);932      const instance = current.stateNode;933      if (typeof instance.componentWillUnmount === 'function') {934        safelyCallComponentWillUnmount(current, instance);935      }936      return;937    }938    case HostComponent: {939      safelyDetachRef(current);940      return;941    }942    case HostPortal: {943      // TODO: this is recursive.944      // We are also not using this parent because945      // the portal will get pushed immediately.946      if (supportsMutation) {947        unmountHostComponents(finishedRoot, current, renderPriorityLevel);948      } else if (supportsPersistence) {949        emptyPortalContainer(current);950      }951      return;952    }953    case FundamentalComponent: {954      if (enableFundamentalAPI) {955        const fundamentalInstance = current.stateNode;956        if (fundamentalInstance !== null) {957          unmountFundamentalComponent(fundamentalInstance);958          current.stateNode = null;959        }960      }961      return;962    }963    case DehydratedFragment: {964      if (enableSuspenseCallback) {965        const hydrationCallbacks = finishedRoot.hydrationCallbacks;966        if (hydrationCallbacks !== null) {967          const onDeleted = hydrationCallbacks.onDeleted;968          if (onDeleted) {969            onDeleted((current.stateNode: SuspenseInstance));970          }971        }972      }973      return;974    }975    case ScopeComponent: {976      if (enableScopeAPI) {977        safelyDetachRef(current);978      }979      return;980    }981  }982}983function commitNestedUnmounts(984  finishedRoot: FiberRoot,985  root: Fiber,986  renderPriorityLevel: ReactPriorityLevel,987): void {988  // While we're inside a removed host node we don't want to call989  // removeChild on the inner nodes because they're removed by the top990  // call anyway. We also want to call componentWillUnmount on all991  // composites before this host node is removed from the tree. Therefore992  // we do an inner loop while we're still inside the host node.993  let node: Fiber = root;994  while (true) {995    commitUnmount(finishedRoot, node, renderPriorityLevel);996    // Visit children because they may contain more composite or host nodes.997    // Skip portals because commitUnmount() currently visits them recursively.998    if (999      node.child !== null &&1000      // If we use mutation we drill down into portals using commitUnmount above.1001      // If we don't use mutation we drill down into portals here instead.1002      (!supportsMutation || node.tag !== HostPortal)1003    ) {1004      node.child.return = node;1005      node = node.child;1006      continue;1007    }1008    if (node === root) {1009      return;1010    }1011    while (node.sibling === null) {1012      if (node.return === null || node.return === root) {1013        return;1014      }1015      node = node.return;1016    }1017    node.sibling.return = node.return;1018    node = node.sibling;1019  }1020}1021function detachFiberMutation(fiber: Fiber) {1022  // Cut off the return pointers to disconnect it from the tree. Ideally, we1023  // should clear the child pointer of the parent alternate to let this1024  // get GC:ed but we don't know which for sure which parent is the current1025  // one so we'll settle for GC:ing the subtree of this child. This child1026  // itself will be GC:ed when the parent updates the next time.1027  // Note: we cannot null out sibling here, otherwise it can cause issues1028  // with findDOMNode and how it requires the sibling field to carry out1029  // traversal in a later effect. See PR #16820. We now clear the sibling1030  // field after effects, see: detachFiberAfterEffects.1031  //1032  // Don't disconnect stateNode now; it will be detached in detachFiberAfterEffects.1033  // It may be required if the current component is an error boundary,1034  // and one of its descendants throws while unmounting a passive effect.1035  fiber.alternate = null;1036  fiber.child = null;1037  fiber.dependencies = null;1038  fiber.firstEffect = null;1039  fiber.lastEffect = null;1040  fiber.memoizedProps = null;1041  fiber.memoizedState = null;1042  fiber.pendingProps = null;1043  fiber.return = null;1044  fiber.updateQueue = null;1045  if (__DEV__) {1046    fiber._debugOwner = null;1047  }1048}1049function emptyPortalContainer(current: Fiber) {1050  if (!supportsPersistence) {1051    return;1052  }1053  const portal: {1054    containerInfo: Container,1055    pendingChildren: ChildSet,1056    ...1057  } = current.stateNode;1058  const {containerInfo} = portal;1059  const emptyChildSet = createContainerChildSet(containerInfo);1060  replaceContainerChildren(containerInfo, emptyChildSet);1061}1062function commitContainer(finishedWork: Fiber) {1063  if (!supportsPersistence) {1064    return;1065  }1066  switch (finishedWork.tag) {1067    case ClassComponent:1068    case HostComponent:1069    case HostText:1070    case FundamentalComponent: {1071      return;1072    }1073    case HostRoot:1074    case HostPortal: {1075      const portalOrRoot: {1076        containerInfo: Container,1077        pendingChildren: ChildSet,1078        ...1079      } = finishedWork.stateNode;1080      const {containerInfo, pendingChildren} = portalOrRoot;1081      replaceContainerChildren(containerInfo, pendingChildren);1082      return;1083    }1084  }1085  invariant(1086    false,1087    'This unit of work tag should not have side-effects. This error is ' +1088      'likely caused by a bug in React. Please file an issue.',1089  );1090}1091function getHostParentFiber(fiber: Fiber): Fiber {1092  let parent = fiber.return;1093  while (parent !== null) {1094    if (isHostParent(parent)) {1095      return parent;1096    }1097    parent = parent.return;1098  }1099  invariant(1100    false,1101    'Expected to find a host parent. This error is likely caused by a bug ' +1102      'in React. Please file an issue.',1103  );1104}1105function isHostParent(fiber: Fiber): boolean {1106  return (1107    fiber.tag === HostComponent ||1108    fiber.tag === HostRoot ||1109    fiber.tag === HostPortal1110  );1111}1112function getHostSibling(fiber: Fiber): ?Instance {1113  // We're going to search forward into the tree until we find a sibling host1114  // node. Unfortunately, if multiple insertions are done in a row we have to1115  // search past them. This leads to exponential search for the next sibling.1116  // TODO: Find a more efficient way to do this.1117  let node: Fiber = fiber;1118  siblings: while (true) {1119    // If we didn't find anything, let's try the next sibling.1120    while (node.sibling === null) {1121      if (node.return === null || isHostParent(node.return)) {1122        // If we pop out of the root or hit the parent the fiber we are the1123        // last sibling.1124        return null;1125      }1126      node = node.return;1127    }1128    node.sibling.return = node.return;1129    node = node.sibling;1130    while (1131      node.tag !== HostComponent &&1132      node.tag !== HostText &&1133      node.tag !== DehydratedFragment1134    ) {1135      // If it is not host node and, we might have a host node inside it.1136      // Try to search down until we find one.1137      if (node.flags & Placement) {1138        // If we don't have a child, try the siblings instead.1139        continue siblings;1140      }1141      // If we don't have a child, try the siblings instead.1142      // We also skip portals because they are not part of this host tree.1143      if (node.child === null || node.tag === HostPortal) {1144        continue siblings;1145      } else {1146        node.child.return = node;1147        node = node.child;1148      }1149    }1150    // Check if this host node is stable or about to be placed.1151    if (!(node.flags & Placement)) {1152      // Found it!1153      return node.stateNode;1154    }1155  }1156}1157function commitPlacement(finishedWork: Fiber): void {1158  if (!supportsMutation) {1159    return;1160  }1161  // Recursively insert all host nodes into the parent.1162  const parentFiber = getHostParentFiber(finishedWork);1163  // Note: these two variables *must* always be updated together.1164  let parent;1165  let isContainer;1166  const parentStateNode = parentFiber.stateNode;1167  switch (parentFiber.tag) {1168    case HostComponent:1169      parent = parentStateNode;1170      isContainer = false;1171      break;1172    case HostRoot:1173      parent = parentStateNode.containerInfo;1174      isContainer = true;1175      break;1176    case HostPortal:1177      parent = parentStateNode.containerInfo;1178      isContainer = true;1179      break;1180    case FundamentalComponent:1181      if (enableFundamentalAPI) {1182        parent = parentStateNode.instance;1183        isContainer = false;1184      }1185    // eslint-disable-next-line-no-fallthrough1186    default:1187      invariant(1188        false,1189        'Invalid host parent fiber. This error is likely caused by a bug ' +1190          'in React. Please file an issue.',1191      );1192  }1193  if (parentFiber.flags & ContentReset) {1194    // Reset the text content of the parent before doing any insertions1195    resetTextContent(parent);1196    // Clear ContentReset from the effect tag1197    parentFiber.flags &= ~ContentReset;1198  }1199  const before = getHostSibling(finishedWork);1200  // We only have the top Fiber that was inserted but we need to recurse down its1201  // children to find all the terminal nodes.1202  if (isContainer) {1203    insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);1204  } else {1205    insertOrAppendPlacementNode(finishedWork, before, parent);1206  }1207}1208function insertOrAppendPlacementNodeIntoContainer(1209  node: Fiber,1210  before: ?Instance,1211  parent: Container,1212): void {1213  const {tag} = node;1214  const isHost = tag === HostComponent || tag === HostText;1215  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1216    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1217    if (before) {1218      insertInContainerBefore(parent, stateNode, before);1219    } else {1220      appendChildToContainer(parent, stateNode);1221    }1222  } else if (tag === HostPortal) {1223    // If the insertion itself is a portal, then we don't want to traverse1224    // down its children. Instead, we'll get insertions from each child in1225    // the portal directly.1226  } else {1227    const child = node.child;1228    if (child !== null) {1229      insertOrAppendPlacementNodeIntoContainer(child, before, parent);1230      let sibling = child.sibling;1231      while (sibling !== null) {1232        insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);1233        sibling = sibling.sibling;1234      }1235    }1236  }1237}1238function insertOrAppendPlacementNode(1239  node: Fiber,1240  before: ?Instance,1241  parent: Instance,1242): void {1243  const {tag} = node;1244  const isHost = tag === HostComponent || tag === HostText;1245  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1246    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1247    if (before) {1248      insertBefore(parent, stateNode, before);1249    } else {1250      appendChild(parent, stateNode);1251    }1252  } else if (tag === HostPortal) {1253    // If the insertion itself is a portal, then we don't want to traverse1254    // down its children. Instead, we'll get insertions from each child in1255    // the portal directly.1256  } else {1257    const child = node.child;1258    if (child !== null) {1259      insertOrAppendPlacementNode(child, before, parent);1260      let sibling = child.sibling;1261      while (sibling !== null) {1262        insertOrAppendPlacementNode(sibling, before, parent);1263        sibling = sibling.sibling;1264      }1265    }1266  }1267}1268function unmountHostComponents(1269  finishedRoot: FiberRoot,1270  current: Fiber,1271  renderPriorityLevel: ReactPriorityLevel,1272): void {1273  // We only have the top Fiber that was deleted but we need to recurse down its1274  // children to find all the terminal nodes.1275  let node: Fiber = current;1276  // Each iteration, currentParent is populated with node's host parent if not1277  // currentParentIsValid.1278  let currentParentIsValid = false;1279  // Note: these two variables *must* always be updated together.1280  let currentParent;1281  let currentParentIsContainer;1282  while (true) {1283    if (!currentParentIsValid) {1284      let parent = node.return;1285      findParent: while (true) {1286        invariant(1287          parent !== null,1288          'Expected to find a host parent. This error is likely caused by ' +1289            'a bug in React. Please file an issue.',1290        );1291        const parentStateNode = parent.stateNode;1292        switch (parent.tag) {1293          case HostComponent:1294            currentParent = parentStateNode;1295            currentParentIsContainer = false;1296            break findParent;1297          case HostRoot:1298            currentParent = parentStateNode.containerInfo;1299            currentParentIsContainer = true;1300            break findParent;1301          case HostPortal:1302            currentParent = parentStateNode.containerInfo;1303            currentParentIsContainer = true;1304            break findParent;1305          case FundamentalComponent:1306            if (enableFundamentalAPI) {1307              currentParent = parentStateNode.instance;1308              currentParentIsContainer = false;1309            }1310        }1311        parent = parent.return;1312      }1313      currentParentIsValid = true;1314    }1315    if (node.tag === HostComponent || node.tag === HostText) {1316      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1317      // After all the children have unmounted, it is now safe to remove the1318      // node from the tree.1319      if (currentParentIsContainer) {1320        removeChildFromContainer(1321          ((currentParent: any): Container),1322          (node.stateNode: Instance | TextInstance),1323        );1324      } else {1325        removeChild(1326          ((currentParent: any): Instance),1327          (node.stateNode: Instance | TextInstance),1328        );1329      }1330      // Don't visit children because we already visited them.1331    } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {1332      const fundamentalNode = node.stateNode.instance;1333      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1334      // After all the children have unmounted, it is now safe to remove the1335      // node from the tree.1336      if (currentParentIsContainer) {1337        removeChildFromContainer(1338          ((currentParent: any): Container),1339          (fundamentalNode: Instance),1340        );1341      } else {1342        removeChild(1343          ((currentParent: any): Instance),1344          (fundamentalNode: Instance),1345        );1346      }1347    } else if (1348      enableSuspenseServerRenderer &&1349      node.tag === DehydratedFragment1350    ) {1351      if (enableSuspenseCallback) {1352        const hydrationCallbacks = finishedRoot.hydrationCallbacks;1353        if (hydrationCallbacks !== null) {1354          const onDeleted = hydrationCallbacks.onDeleted;1355          if (onDeleted) {1356            onDeleted((node.stateNode: SuspenseInstance));1357          }1358        }1359      }1360      // Delete the dehydrated suspense boundary and all of its content.1361      if (currentParentIsContainer) {1362        clearSuspenseBoundaryFromContainer(1363          ((currentParent: any): Container),1364          (node.stateNode: SuspenseInstance),1365        );1366      } else {1367        clearSuspenseBoundary(1368          ((currentParent: any): Instance),1369          (node.stateNode: SuspenseInstance),1370        );1371      }1372    } else if (node.tag === HostPortal) {1373      if (node.child !== null) {1374        // When we go into a portal, it becomes the parent to remove from.1375        // We will reassign it back when we pop the portal on the way up.1376        currentParent = node.stateNode.containerInfo;1377        currentParentIsContainer = true;1378        // Visit children because portals might contain host components.1379        node.child.return = node;1380        node = node.child;1381        continue;1382      }1383    } else {1384      commitUnmount(finishedRoot, node, renderPriorityLevel);1385      // Visit children because we may find more host components below.1386      if (node.child !== null) {1387        node.child.return = node;1388        node = node.child;1389        continue;1390      }1391    }1392    if (node === current) {1393      return;1394    }1395    while (node.sibling === null) {1396      if (node.return === null || node.return === current) {1397        return;1398      }1399      node = node.return;1400      if (node.tag === HostPortal) {1401        // When we go out of the portal, we need to restore the parent.1402        // Since we don't keep a stack of them, we will search for it.1403        currentParentIsValid = false;1404      }1405    }1406    node.sibling.return = node.return;1407    node = node.sibling;1408  }1409}1410function commitDeletion(1411  finishedRoot: FiberRoot,1412  current: Fiber,1413  renderPriorityLevel: ReactPriorityLevel,1414): void {1415  if (supportsMutation) {1416    // Recursively delete all host nodes from the parent.1417    // Detach refs and call componentWillUnmount() on the whole subtree.1418    unmountHostComponents(finishedRoot, current, renderPriorityLevel);1419  } else {1420    // Detach refs and call componentWillUnmount() on the whole subtree.1421    commitNestedUnmounts(finishedRoot, current, renderPriorityLevel);1422  }1423  const alternate = current.alternate;1424  detachFiberMutation(current);1425  if (alternate !== null) {1426    detachFiberMutation(alternate);1427  }1428}1429function commitWork(current: Fiber | null, finishedWork: Fiber): void {1430  if (!supportsMutation) {1431    switch (finishedWork.tag) {1432      case FunctionComponent:1433      case ForwardRef:1434      case MemoComponent:1435      case SimpleMemoComponent: {1436        // Layout effects are destroyed during the mutation phase so that all1437        // destroy functions for all fibers are called before any create functions.1438        // This prevents sibling component effects from interfering with each other,1439        // e.g. a destroy function in one component should never override a ref set1440        // by a create function in another component during the same commit.1441        if (1442          enableProfilerTimer &&1443          enableProfilerCommitHooks &&1444          finishedWork.mode & ProfileMode1445        ) {1446          try {1447            startLayoutEffectTimer();1448            commitHookEffectListUnmount(1449              HookLayout | HookHasEffect,1450              finishedWork,1451            );1452          } finally {1453            recordLayoutEffectDuration(finishedWork);1454          }1455        } else {1456          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1457        }1458        return;1459      }1460      case Profiler: {1461        return;1462      }1463      case SuspenseComponent: {1464        commitSuspenseComponent(finishedWork);1465        attachSuspenseRetryListeners(finishedWork);1466        return;1467      }1468      case SuspenseListComponent: {1469        attachSuspenseRetryListeners(finishedWork);1470        return;1471      }1472      case HostRoot: {1473        if (supportsHydration) {1474          const root: FiberRoot = finishedWork.stateNode;1475          if (root.hydrate) {1476            // We've just hydrated. No need to hydrate again.1477            root.hydrate = false;1478            commitHydratedContainer(root.containerInfo);1479          }1480        }1481        break;1482      }1483      case OffscreenComponent:1484      case LegacyHiddenComponent: {1485        return;1486      }1487    }1488    commitContainer(finishedWork);1489    return;1490  }1491  switch (finishedWork.tag) {1492    case FunctionComponent:1493    case ForwardRef:1494    case MemoComponent:1495    case SimpleMemoComponent: {1496      // Layout effects are destroyed during the mutation phase so that all1497      // destroy functions for all fibers are called before any create functions.1498      // This prevents sibling component effects from interfering with each other,1499      // e.g. a destroy function in one component should never override a ref set1500      // by a create function in another component during the same commit.1501      if (1502        enableProfilerTimer &&1503        enableProfilerCommitHooks &&1504        finishedWork.mode & ProfileMode1505      ) {1506        try {1507          startLayoutEffectTimer();1508          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1509        } finally {1510          recordLayoutEffectDuration(finishedWork);1511        }1512      } else {1513        commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1514      }1515      return;1516    }1517    case ClassComponent: {1518      return;1519    }1520    case HostComponent: {1521      const instance: Instance = finishedWork.stateNode;1522      if (instance != null) {1523        // Commit the work prepared earlier.1524        const newProps = finishedWork.memoizedProps;1525        // For hydration we reuse the update path but we treat the oldProps1526        // as the newProps. The updatePayload will contain the real change in1527        // this case.1528        const oldProps = current !== null ? current.memoizedProps : newProps;1529        const type = finishedWork.type;1530        // TODO: Type the updateQueue to be specific to host components.1531        const updatePayload: null | UpdatePayload = (finishedWork.updateQueue: any);1532        finishedWork.updateQueue = null;1533        if (updatePayload !== null) {1534          commitUpdate(1535            instance,1536            updatePayload,1537            type,1538            oldProps,1539            newProps,1540            finishedWork,1541          );1542        }1543      }1544      return;1545    }1546    case HostText: {1547      invariant(1548        finishedWork.stateNode !== null,1549        'This should have a text node initialized. This error is likely ' +1550          'caused by a bug in React. Please file an issue.',1551      );1552      const textInstance: TextInstance = finishedWork.stateNode;1553      const newText: string = finishedWork.memoizedProps;1554      // For hydration we reuse the update path but we treat the oldProps1555      // as the newProps. The updatePayload will contain the real change in1556      // this case.1557      const oldText: string =1558        current !== null ? current.memoizedProps : newText;1559      commitTextUpdate(textInstance, oldText, newText);1560      return;1561    }1562    case HostRoot: {1563      if (supportsHydration) {1564        const root: FiberRoot = finishedWork.stateNode;1565        if (root.hydrate) {1566          // We've just hydrated. No need to hydrate again.1567          root.hydrate = false;1568          commitHydratedContainer(root.containerInfo);1569        }1570      }1571      return;1572    }1573    case Profiler: {1574      return;1575    }1576    case SuspenseComponent: {1577      commitSuspenseComponent(finishedWork);1578      attachSuspenseRetryListeners(finishedWork);1579      return;1580    }1581    case SuspenseListComponent: {1582      attachSuspenseRetryListeners(finishedWork);1583      return;1584    }1585    case IncompleteClassComponent: {1586      return;1587    }1588    case FundamentalComponent: {1589      if (enableFundamentalAPI) {1590        const fundamentalInstance = finishedWork.stateNode;1591        updateFundamentalComponent(fundamentalInstance);1592        return;1593      }1594      break;1595    }1596    case ScopeComponent: {1597      if (enableScopeAPI) {1598        const scopeInstance = finishedWork.stateNode;1599        prepareScopeUpdate(scopeInstance, finishedWork);1600        return;1601      }1602      break;1603    }1604    case OffscreenComponent:1605    case LegacyHiddenComponent: {1606      const newState: OffscreenState | null = finishedWork.memoizedState;1607      const isHidden = newState !== null;1608      hideOrUnhideAllChildren(finishedWork, isHidden);1609      return;1610    }1611  }1612  invariant(1613    false,1614    'This unit of work tag should not have side-effects. This error is ' +1615      'likely caused by a bug in React. Please file an issue.',1616  );1617}1618function commitSuspenseComponent(finishedWork: Fiber) {1619  const newState: SuspenseState | null = finishedWork.memoizedState;1620  if (newState !== null) {1621    markCommitTimeOfFallback();1622    if (supportsMutation) {1623      // Hide the Offscreen component that contains the primary children. TODO:1624      // Ideally, this effect would have been scheduled on the Offscreen fiber1625      // itself. That's how unhiding works: the Offscreen component schedules an1626      // effect on itself. However, in this case, the component didn't complete,1627      // so the fiber was never added to the effect list in the normal path. We1628      // could have appended it to the effect list in the Suspense component's1629      // second pass, but doing it this way is less complicated. This would be1630      // simpler if we got rid of the effect list and traversed the tree, like1631      // we're planning to do.1632      const primaryChildParent: Fiber = (finishedWork.child: any);1633      hideOrUnhideAllChildren(primaryChildParent, true);1634    }1635  }1636  if (enableSuspenseCallback && newState !== null) {1637    const suspenseCallback = finishedWork.memoizedProps.suspenseCallback;1638    if (typeof suspenseCallback === 'function') {1639      const wakeables: Set<Wakeable> | null = (finishedWork.updateQueue: any);1640      if (wakeables !== null) {1641        suspenseCallback(new Set(wakeables));1642      }1643    } else if (__DEV__) {1644      if (suspenseCallback !== undefined) {1645        console.error('Unexpected type for suspenseCallback.');1646      }1647    }1648  }1649}1650function commitSuspenseHydrationCallbacks(1651  finishedRoot: FiberRoot,1652  finishedWork: Fiber,1653) {1654  if (!supportsHydration) {1655    return;1656  }1657  const newState: SuspenseState | null = finishedWork.memoizedState;1658  if (newState === null) {1659    const current = finishedWork.alternate;1660    if (current !== null) {1661      const prevState: SuspenseState | null = current.memoizedState;1662      if (prevState !== null) {1663        const suspenseInstance = prevState.dehydrated;1664        if (suspenseInstance !== null) {1665          commitHydratedSuspenseInstance(suspenseInstance);1666          if (enableSuspenseCallback) {1667            const hydrationCallbacks = finishedRoot.hydrationCallbacks;1668            if (hydrationCallbacks !== null) {1669              const onHydrated = hydrationCallbacks.onHydrated;1670              if (onHydrated) {1671                onHydrated(suspenseInstance);1672              }1673            }1674          }1675        }1676      }1677    }1678  }1679}1680function attachSuspenseRetryListeners(finishedWork: Fiber) {1681  // If this boundary just timed out, then it will have a set of wakeables.1682  // For each wakeable, attach a listener so that when it resolves, React1683  // attempts to re-render the boundary in the primary (pre-timeout) state.1684  const wakeables: Set<Wakeable> | null = (finishedWork.updateQueue: any);1685  if (wakeables !== null) {1686    finishedWork.updateQueue = null;1687    let retryCache = finishedWork.stateNode;1688    if (retryCache === null) {1689      retryCache = finishedWork.stateNode = new PossiblyWeakSet();1690    }1691    wakeables.forEach(wakeable => {1692      // Memoize using the boundary fiber to prevent redundant listeners.1693      let retry = resolveRetryWakeable.bind(null, finishedWork, wakeable);1694      if (!retryCache.has(wakeable)) {1695        if (enableSchedulerTracing) {1696          if (wakeable.__reactDoNotTraceInteractions !== true) {1697            retry = Schedule_tracing_wrap(retry);1698          }1699        }1700        retryCache.add(wakeable);1701        wakeable.then(retry, retry);1702      }1703    });1704  }1705}1706// This function detects when a Suspense boundary goes from visible to hidden.1707// It returns false if the boundary is already hidden.1708// TODO: Use an effect tag.1709export function isSuspenseBoundaryBeingHidden(1710  current: Fiber | null,1711  finishedWork: Fiber,1712): boolean {1713  if (current !== null) {1714    const oldState: SuspenseState | null = current.memoizedState;1715    if (oldState === null || oldState.dehydrated !== null) {1716      const newState: SuspenseState | null = finishedWork.memoizedState;1717      return newState !== null && newState.dehydrated === null;1718    }1719  }1720  return false;1721}1722function commitResetTextContent(current: Fiber) {1723  if (!supportsMutation) {1724    return;1725  }1726  resetTextContent(current.stateNode);1727}1728export {1729  commitBeforeMutationLifeCycles,1730  commitResetTextContent,1731  commitPlacement,1732  commitDeletion,1733  commitWork,1734  commitLifeCycles,1735  commitAttachRef,1736  commitDetachRef,...

ReactFiberCommitWork.old.js

Source:ReactFiberCommitWork.old.js

1/**2 * Copyright (c) Facebook, Inc. and its affiliates.3 *4 * This source code is licensed under the MIT license found in the5 * LICENSE file in the root directory of this source tree.6 *7 *      8 */9             10           11               12                   13            14           15                16                                17                                                18                                                    19                                            20                                                                     21                                                        22                                                                        23                                                24                                                             25                                                                   26import {unstable_wrap as Schedule_tracing_wrap} from 'scheduler/tracing';27import {28  enableSchedulerTracing,29  enableProfilerTimer,30  enableProfilerCommitHooks,31  enableSuspenseServerRenderer,32  enableFundamentalAPI,33  enableSuspenseCallback,34  enableScopeAPI,35} from 'shared/ReactFeatureFlags';36import {37  FunctionComponent,38  ForwardRef,39  ClassComponent,40  HostRoot,41  HostComponent,42  HostText,43  HostPortal,44  Profiler,45  SuspenseComponent,46  DehydratedFragment,47  IncompleteClassComponent,48  MemoComponent,49  SimpleMemoComponent,50  SuspenseListComponent,51  FundamentalComponent,52  ScopeComponent,53  Block,54  OffscreenComponent,55  LegacyHiddenComponent,56} from './ReactWorkTags';57import {58  invokeGuardedCallback,59  hasCaughtError,60  clearCaughtError,61} from 'shared/ReactErrorUtils';62import {63  NoFlags,64  ContentReset,65  Placement,66  Snapshot,67  Update,68} from './ReactFiberFlags';69import getComponentName from 'shared/getComponentName';70import invariant from 'shared/invariant';71import {onCommitUnmount} from './ReactFiberDevToolsHook.old';72import {resolveDefaultProps} from './ReactFiberLazyComponent.old';73import {74  getCommitTime,75  recordLayoutEffectDuration,76  startLayoutEffectTimer,77} from './ReactProfilerTimer.old';78import {ProfileMode} from './ReactTypeOfMode';79import {commitUpdateQueue} from './ReactUpdateQueue.old';80import {81  getPublicInstance,82  supportsMutation,83  supportsPersistence,84  supportsHydration,85  commitMount,86  commitUpdate,87  resetTextContent,88  commitTextUpdate,89  appendChild,90  appendChildToContainer,91  insertBefore,92  insertInContainerBefore,93  removeChild,94  removeChildFromContainer,95  clearSuspenseBoundary,96  clearSuspenseBoundaryFromContainer,97  replaceContainerChildren,98  createContainerChildSet,99  hideInstance,100  hideTextInstance,101  unhideInstance,102  unhideTextInstance,103  unmountFundamentalComponent,104  updateFundamentalComponent,105  commitHydratedContainer,106  commitHydratedSuspenseInstance,107  clearContainer,108  prepareScopeUpdate,109} from './ReactFiberHostConfig';110import {111  captureCommitPhaseError,112  resolveRetryWakeable,113  markCommitTimeOfFallback,114  enqueuePendingPassiveHookEffectMount,115  enqueuePendingPassiveHookEffectUnmount,116  enqueuePendingPassiveProfilerEffect,117} from './ReactFiberWorkLoop.old';118import {119  NoFlags as NoHookEffect,120  HasEffect as HookHasEffect,121  Layout as HookLayout,122  Passive as HookPassive,123} from './ReactHookEffectTags';124import {didWarnAboutReassigningProps} from './ReactFiberBeginWork.old';125let didWarnAboutUndefinedSnapshotBeforeUpdate                    = null;126if (__DEV__) {127  didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();128}129const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;130const callComponentWillUnmountWithTimer = function(current, instance) {131  instance.props = current.memoizedProps;132  instance.state = current.memoizedState;133  if (134    enableProfilerTimer &&135    enableProfilerCommitHooks &&136    current.mode & ProfileMode137  ) {138    try {139      startLayoutEffectTimer();140      instance.componentWillUnmount();141    } finally {142      recordLayoutEffectDuration(current);143    }144  } else {145    instance.componentWillUnmount();146  }147};148// Capture errors so they don't interrupt unmounting.149function safelyCallComponentWillUnmount(current       , instance     ) {150  if (__DEV__) {151    invokeGuardedCallback(152      null,153      callComponentWillUnmountWithTimer,154      null,155      current,156      instance,157    );158    if (hasCaughtError()) {159      const unmountError = clearCaughtError();160      captureCommitPhaseError(current, unmountError);161    }162  } else {163    try {164      callComponentWillUnmountWithTimer(current, instance);165    } catch (unmountError) {166      captureCommitPhaseError(current, unmountError);167    }168  }169}170function safelyDetachRef(current       ) {171  const ref = current.ref;172  if (ref !== null) {173    if (typeof ref === 'function') {174      if (__DEV__) {175        invokeGuardedCallback(null, ref, null, null);176        if (hasCaughtError()) {177          const refError = clearCaughtError();178          captureCommitPhaseError(current, refError);179        }180      } else {181        try {182          ref(null);183        } catch (refError) {184          captureCommitPhaseError(current, refError);185        }186      }187    } else {188      ref.current = null;189    }190  }191}192function safelyCallDestroy(current       , destroy            ) {193  if (__DEV__) {194    invokeGuardedCallback(null, destroy, null);195    if (hasCaughtError()) {196      const error = clearCaughtError();197      captureCommitPhaseError(current, error);198    }199  } else {200    try {201      destroy();202    } catch (error) {203      captureCommitPhaseError(current, error);204    }205  }206}207function commitBeforeMutationLifeCycles(208  current              ,209  finishedWork       ,210)       {211  switch (finishedWork.tag) {212    case FunctionComponent:213    case ForwardRef:214    case SimpleMemoComponent:215    case Block: {216      return;217    }218    case ClassComponent: {219      if (finishedWork.flags & Snapshot) {220        if (current !== null) {221          const prevProps = current.memoizedProps;222          const prevState = current.memoizedState;223          const instance = finishedWork.stateNode;224          // We could update instance props and state here,225          // but instead we rely on them being set during last render.226          // TODO: revisit this when we implement resuming.227          if (__DEV__) {228            if (229              finishedWork.type === finishedWork.elementType &&230              !didWarnAboutReassigningProps231            ) {232              if (instance.props !== finishedWork.memoizedProps) {233                console.error(234                  'Expected %s props to match memoized props before ' +235                    'getSnapshotBeforeUpdate. ' +236                    'This might either be because of a bug in React, or because ' +237                    'a component reassigns its own `this.props`. ' +238                    'Please file an issue.',239                  getComponentName(finishedWork.type) || 'instance',240                );241              }242              if (instance.state !== finishedWork.memoizedState) {243                console.error(244                  'Expected %s state to match memoized state before ' +245                    'getSnapshotBeforeUpdate. ' +246                    'This might either be because of a bug in React, or because ' +247                    'a component reassigns its own `this.state`. ' +248                    'Please file an issue.',249                  getComponentName(finishedWork.type) || 'instance',250                );251              }252            }253          }254          const snapshot = instance.getSnapshotBeforeUpdate(255            finishedWork.elementType === finishedWork.type256              ? prevProps257              : resolveDefaultProps(finishedWork.type, prevProps),258            prevState,259          );260          if (__DEV__) {261            const didWarnSet = ((didWarnAboutUndefinedSnapshotBeforeUpdate     )            );262            if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {263              didWarnSet.add(finishedWork.type);264              console.error(265                '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' +266                  'must be returned. You have returned undefined.',267                getComponentName(finishedWork.type),268              );269            }270          }271          instance.__reactInternalSnapshotBeforeUpdate = snapshot;272        }273      }274      return;275    }276    case HostRoot: {277      if (supportsMutation) {278        if (finishedWork.flags & Snapshot) {279          const root = finishedWork.stateNode;280          clearContainer(root.containerInfo);281        }282      }283      return;284    }285    case HostComponent:286    case HostText:287    case HostPortal:288    case IncompleteClassComponent:289      // Nothing to do for these component types290      return;291  }292  invariant(293    false,294    'This unit of work tag should not have side-effects. This error is ' +295      'likely caused by a bug in React. Please file an issue.',296  );297}298function commitHookEffectListUnmount(tag        , finishedWork       ) {299  const updateQueue                                      = (finishedWork.updateQueue     );300  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;301  if (lastEffect !== null) {302    const firstEffect = lastEffect.next;303    let effect = firstEffect;304    do {305      if ((effect.tag & tag) === tag) {306        // Unmount307        const destroy = effect.destroy;308        effect.destroy = undefined;309        if (destroy !== undefined) {310          destroy();311        }312      }313      effect = effect.next;314    } while (effect !== firstEffect);315  }316}317function commitHookEffectListMount(tag        , finishedWork       ) {318  const updateQueue                                      = (finishedWork.updateQueue     );319  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;320  if (lastEffect !== null) {321    const firstEffect = lastEffect.next;322    let effect = firstEffect;323    do {324      if ((effect.tag & tag) === tag) {325        // Mount326        const create = effect.create;327        effect.destroy = create();328        if (__DEV__) {329          const destroy = effect.destroy;330          if (destroy !== undefined && typeof destroy !== 'function') {331            let addendum;332            if (destroy === null) {333              addendum =334                ' You returned null. If your effect does not require clean ' +335                'up, return undefined (or nothing).';336            } else if (typeof destroy.then === 'function') {337              addendum =338                '\n\nIt looks like you wrote useEffect(async () => ...) or returned a Promise. ' +339                'Instead, write the async function inside your effect ' +340                'and call it immediately:\n\n' +341                'useEffect(() => {\n' +342                '  async function fetchData() {\n' +343                '    // You can await here\n' +344                '    const response = await MyAPI.getData(someId);\n' +345                '    // ...\n' +346                '  }\n' +347                '  fetchData();\n' +348                `}, [someId]); // Or [] if effect doesn't need props or state\n\n` +349                'Learn more about data fetching with Hooks: https://reactjs.org/link/hooks-data-fetching';350            } else {351              addendum = ' You returned: ' + destroy;352            }353            console.error(354              'An effect function must not return anything besides a function, ' +355                'which is used for clean-up.%s',356              addendum,357            );358          }359        }360      }361      effect = effect.next;362    } while (effect !== firstEffect);363  }364}365function schedulePassiveEffects(finishedWork       ) {366  const updateQueue                                      = (finishedWork.updateQueue     );367  const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;368  if (lastEffect !== null) {369    const firstEffect = lastEffect.next;370    let effect = firstEffect;371    do {372      const {next, tag} = effect;373      if (374        (tag & HookPassive) !== NoHookEffect &&375        (tag & HookHasEffect) !== NoHookEffect376      ) {377        enqueuePendingPassiveHookEffectUnmount(finishedWork, effect);378        enqueuePendingPassiveHookEffectMount(finishedWork, effect);379      }380      effect = next;381    } while (effect !== firstEffect);382  }383}384export function commitPassiveEffectDurations(385  finishedRoot           ,386  finishedWork       ,387)       {388  if (enableProfilerTimer && enableProfilerCommitHooks) {389    // Only Profilers with work in their subtree will have an Update effect scheduled.390    if ((finishedWork.flags & Update) !== NoFlags) {391      switch (finishedWork.tag) {392        case Profiler: {393          const {passiveEffectDuration} = finishedWork.stateNode;394          const {id, onPostCommit} = finishedWork.memoizedProps;395          // This value will still reflect the previous commit phase.396          // It does not get reset until the start of the next commit phase.397          const commitTime = getCommitTime();398          if (typeof onPostCommit === 'function') {399            if (enableSchedulerTracing) {400              onPostCommit(401                id,402                finishedWork.alternate === null ? 'mount' : 'update',403                passiveEffectDuration,404                commitTime,405                finishedRoot.memoizedInteractions,406              );407            } else {408              onPostCommit(409                id,410                finishedWork.alternate === null ? 'mount' : 'update',411                passiveEffectDuration,412                commitTime,413              );414            }415          }416          // Bubble times to the next nearest ancestor Profiler.417          // After we process that Profiler, we'll bubble further up.418          let parentFiber = finishedWork.return;419          while (parentFiber !== null) {420            if (parentFiber.tag === Profiler) {421              const parentStateNode = parentFiber.stateNode;422              parentStateNode.passiveEffectDuration += passiveEffectDuration;423              break;424            }425            parentFiber = parentFiber.return;426          }427          break;428        }429        default:430          break;431      }432    }433  }434}435function commitLifeCycles(436  finishedRoot           ,437  current              ,438  finishedWork       ,439  committedLanes       ,440)       {441  switch (finishedWork.tag) {442    case FunctionComponent:443    case ForwardRef:444    case SimpleMemoComponent:445    case Block: {446      // At this point layout effects have already been destroyed (during mutation phase).447      // This is done to prevent sibling component effects from interfering with each other,448      // e.g. a destroy function in one component should never override a ref set449      // by a create function in another component during the same commit.450      if (451        enableProfilerTimer &&452        enableProfilerCommitHooks &&453        finishedWork.mode & ProfileMode454      ) {455        try {456          startLayoutEffectTimer();457          commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);458        } finally {459          recordLayoutEffectDuration(finishedWork);460        }461      } else {462        commitHookEffectListMount(HookLayout | HookHasEffect, finishedWork);463      }464      schedulePassiveEffects(finishedWork);465      return;466    }467    case ClassComponent: {468      const instance = finishedWork.stateNode;469      if (finishedWork.flags & Update) {470        if (current === null) {471          // We could update instance props and state here,472          // but instead we rely on them being set during last render.473          // TODO: revisit this when we implement resuming.474          if (__DEV__) {475            if (476              finishedWork.type === finishedWork.elementType &&477              !didWarnAboutReassigningProps478            ) {479              if (instance.props !== finishedWork.memoizedProps) {480                console.error(481                  'Expected %s props to match memoized props before ' +482                    'componentDidMount. ' +483                    'This might either be because of a bug in React, or because ' +484                    'a component reassigns its own `this.props`. ' +485                    'Please file an issue.',486                  getComponentName(finishedWork.type) || 'instance',487                );488              }489              if (instance.state !== finishedWork.memoizedState) {490                console.error(491                  'Expected %s state to match memoized state before ' +492                    'componentDidMount. ' +493                    'This might either be because of a bug in React, or because ' +494                    'a component reassigns its own `this.state`. ' +495                    'Please file an issue.',496                  getComponentName(finishedWork.type) || 'instance',497                );498              }499            }500          }501          if (502            enableProfilerTimer &&503            enableProfilerCommitHooks &&504            finishedWork.mode & ProfileMode505          ) {506            try {507              startLayoutEffectTimer();508              instance.componentDidMount();509            } finally {510              recordLayoutEffectDuration(finishedWork);511            }512          } else {513            instance.componentDidMount();514          }515        } else {516          const prevProps =517            finishedWork.elementType === finishedWork.type518              ? current.memoizedProps519              : resolveDefaultProps(finishedWork.type, current.memoizedProps);520          const prevState = current.memoizedState;521          // We could update instance props and state here,522          // but instead we rely on them being set during last render.523          // TODO: revisit this when we implement resuming.524          if (__DEV__) {525            if (526              finishedWork.type === finishedWork.elementType &&527              !didWarnAboutReassigningProps528            ) {529              if (instance.props !== finishedWork.memoizedProps) {530                console.error(531                  'Expected %s props to match memoized props before ' +532                    'componentDidUpdate. ' +533                    'This might either be because of a bug in React, or because ' +534                    'a component reassigns its own `this.props`. ' +535                    'Please file an issue.',536                  getComponentName(finishedWork.type) || 'instance',537                );538              }539              if (instance.state !== finishedWork.memoizedState) {540                console.error(541                  'Expected %s state to match memoized state before ' +542                    'componentDidUpdate. ' +543                    'This might either be because of a bug in React, or because ' +544                    'a component reassigns its own `this.state`. ' +545                    'Please file an issue.',546                  getComponentName(finishedWork.type) || 'instance',547                );548              }549            }550          }551          if (552            enableProfilerTimer &&553            enableProfilerCommitHooks &&554            finishedWork.mode & ProfileMode555          ) {556            try {557              startLayoutEffectTimer();558              instance.componentDidUpdate(559                prevProps,560                prevState,561                instance.__reactInternalSnapshotBeforeUpdate,562              );563            } finally {564              recordLayoutEffectDuration(finishedWork);565            }566          } else {567            instance.componentDidUpdate(568              prevProps,569              prevState,570              instance.__reactInternalSnapshotBeforeUpdate,571            );572          }573        }574      }575      // TODO: I think this is now always non-null by the time it reaches the576      // commit phase. Consider removing the type check.577      const updateQueue              578          579               = (finishedWork.updateQueue     );580      if (updateQueue !== null) {581        if (__DEV__) {582          if (583            finishedWork.type === finishedWork.elementType &&584            !didWarnAboutReassigningProps585          ) {586            if (instance.props !== finishedWork.memoizedProps) {587              console.error(588                'Expected %s props to match memoized props before ' +589                  'processing the update queue. ' +590                  'This might either be because of a bug in React, or because ' +591                  'a component reassigns its own `this.props`. ' +592                  'Please file an issue.',593                getComponentName(finishedWork.type) || 'instance',594              );595            }596            if (instance.state !== finishedWork.memoizedState) {597              console.error(598                'Expected %s state to match memoized state before ' +599                  'processing the update queue. ' +600                  'This might either be because of a bug in React, or because ' +601                  'a component reassigns its own `this.state`. ' +602                  'Please file an issue.',603                getComponentName(finishedWork.type) || 'instance',604              );605            }606          }607        }608        // We could update instance props and state here,609        // but instead we rely on them being set during last render.610        // TODO: revisit this when we implement resuming.611        commitUpdateQueue(finishedWork, updateQueue, instance);612      }613      return;614    }615    case HostRoot: {616      // TODO: I think this is now always non-null by the time it reaches the617      // commit phase. Consider removing the type check.618      const updateQueue              619          620               = (finishedWork.updateQueue     );621      if (updateQueue !== null) {622        let instance = null;623        if (finishedWork.child !== null) {624          switch (finishedWork.child.tag) {625            case HostComponent:626              instance = getPublicInstance(finishedWork.child.stateNode);627              break;628            case ClassComponent:629              instance = finishedWork.child.stateNode;630              break;631          }632        }633        commitUpdateQueue(finishedWork, updateQueue, instance);634      }635      return;636    }637    case HostComponent: {638      const instance           = finishedWork.stateNode;639      // Renderers may schedule work to be done after host components are mounted640      // (eg DOM renderer may schedule auto-focus for inputs and form controls).641      // These effects should only be committed when components are first mounted,642      // aka when there is no current/alternate.643      if (current === null && finishedWork.flags & Update) {644        const type = finishedWork.type;645        const props = finishedWork.memoizedProps;646        commitMount(instance, type, props, finishedWork);647      }648      return;649    }650    case HostText: {651      // We have no life-cycles associated with text.652      return;653    }654    case HostPortal: {655      // We have no life-cycles associated with portals.656      return;657    }658    case Profiler: {659      if (enableProfilerTimer) {660        const {onCommit, onRender} = finishedWork.memoizedProps;661        const {effectDuration} = finishedWork.stateNode;662        const commitTime = getCommitTime();663        if (typeof onRender === 'function') {664          if (enableSchedulerTracing) {665            onRender(666              finishedWork.memoizedProps.id,667              current === null ? 'mount' : 'update',668              finishedWork.actualDuration,669              finishedWork.treeBaseDuration,670              finishedWork.actualStartTime,671              commitTime,672              finishedRoot.memoizedInteractions,673            );674          } else {675            onRender(676              finishedWork.memoizedProps.id,677              current === null ? 'mount' : 'update',678              finishedWork.actualDuration,679              finishedWork.treeBaseDuration,680              finishedWork.actualStartTime,681              commitTime,682            );683          }684        }685        if (enableProfilerCommitHooks) {686          if (typeof onCommit === 'function') {687            if (enableSchedulerTracing) {688              onCommit(689                finishedWork.memoizedProps.id,690                current === null ? 'mount' : 'update',691                effectDuration,692                commitTime,693                finishedRoot.memoizedInteractions,694              );695            } else {696              onCommit(697                finishedWork.memoizedProps.id,698                current === null ? 'mount' : 'update',699                effectDuration,700                commitTime,701              );702            }703          }704          // Schedule a passive effect for this Profiler to call onPostCommit hooks.705          // This effect should be scheduled even if there is no onPostCommit callback for this Profiler,706          // because the effect is also where times bubble to parent Profilers.707          enqueuePendingPassiveProfilerEffect(finishedWork);708          // Propagate layout effect durations to the next nearest Profiler ancestor.709          // Do not reset these values until the next render so DevTools has a chance to read them first.710          let parentFiber = finishedWork.return;711          while (parentFiber !== null) {712            if (parentFiber.tag === Profiler) {713              const parentStateNode = parentFiber.stateNode;714              parentStateNode.effectDuration += effectDuration;715              break;716            }717            parentFiber = parentFiber.return;718          }719        }720      }721      return;722    }723    case SuspenseComponent: {724      commitSuspenseHydrationCallbacks(finishedRoot, finishedWork);725      return;726    }727    case SuspenseListComponent:728    case IncompleteClassComponent:729    case FundamentalComponent:730    case ScopeComponent:731    case OffscreenComponent:732    case LegacyHiddenComponent:733      return;734  }735  invariant(736    false,737    'This unit of work tag should not have side-effects. This error is ' +738      'likely caused by a bug in React. Please file an issue.',739  );740}741function hideOrUnhideAllChildren(finishedWork, isHidden) {742  if (supportsMutation) {743    // We only have the top Fiber that was inserted but we need to recurse down its744    // children to find all the terminal nodes.745    let node        = finishedWork;746    while (true) {747      if (node.tag === HostComponent) {748        const instance = node.stateNode;749        if (isHidden) {750          hideInstance(instance);751        } else {752          unhideInstance(node.stateNode, node.memoizedProps);753        }754      } else if (node.tag === HostText) {755        const instance = node.stateNode;756        if (isHidden) {757          hideTextInstance(instance);758        } else {759          unhideTextInstance(instance, node.memoizedProps);760        }761      } else if (762        (node.tag === OffscreenComponent ||763          node.tag === LegacyHiddenComponent) &&764        (node.memoizedState                ) !== null &&765        node !== finishedWork766      ) {767        // Found a nested Offscreen component that is hidden. Don't search768        // any deeper. This tree should remain hidden.769      } else if (node.child !== null) {770        node.child.return = node;771        node = node.child;772        continue;773      }774      if (node === finishedWork) {775        return;776      }777      while (node.sibling === null) {778        if (node.return === null || node.return === finishedWork) {779          return;780        }781        node = node.return;782      }783      node.sibling.return = node.return;784      node = node.sibling;785    }786  }787}788function commitAttachRef(finishedWork       ) {789  const ref = finishedWork.ref;790  if (ref !== null) {791    const instance = finishedWork.stateNode;792    let instanceToUse;793    switch (finishedWork.tag) {794      case HostComponent:795        instanceToUse = getPublicInstance(instance);796        break;797      default:798        instanceToUse = instance;799    }800    // Moved outside to ensure DCE works with this flag801    if (enableScopeAPI && finishedWork.tag === ScopeComponent) {802      instanceToUse = instance;803    }804    if (typeof ref === 'function') {805      ref(instanceToUse);806    } else {807      if (__DEV__) {808        if (!ref.hasOwnProperty('current')) {809          console.error(810            'Unexpected ref object provided for %s. ' +811              'Use either a ref-setter function or React.createRef().',812            getComponentName(finishedWork.type),813          );814        }815      }816      ref.current = instanceToUse;817    }818  }819}820function commitDetachRef(current       ) {821  const currentRef = current.ref;822  if (currentRef !== null) {823    if (typeof currentRef === 'function') {824      currentRef(null);825    } else {826      currentRef.current = null;827    }828  }829}830// User-originating errors (lifecycles and refs) should not interrupt831// deletion, so don't let them throw. Host-originating errors should832// interrupt deletion, so it's okay833function commitUnmount(834  finishedRoot           ,835  current       ,836  renderPriorityLevel                    ,837)       {838  onCommitUnmount(current);839  switch (current.tag) {840    case FunctionComponent:841    case ForwardRef:842    case MemoComponent:843    case SimpleMemoComponent:844    case Block: {845      const updateQueue                                      = (current.updateQueue     );846      if (updateQueue !== null) {847        const lastEffect = updateQueue.lastEffect;848        if (lastEffect !== null) {849          const firstEffect = lastEffect.next;850          let effect = firstEffect;851          do {852            const {destroy, tag} = effect;853            if (destroy !== undefined) {854              if ((tag & HookPassive) !== NoHookEffect) {855                enqueuePendingPassiveHookEffectUnmount(current, effect);856              } else {857                if (858                  enableProfilerTimer &&859                  enableProfilerCommitHooks &&860                  current.mode & ProfileMode861                ) {862                  startLayoutEffectTimer();863                  safelyCallDestroy(current, destroy);864                  recordLayoutEffectDuration(current);865                } else {866                  safelyCallDestroy(current, destroy);867                }868              }869            }870            effect = effect.next;871          } while (effect !== firstEffect);872        }873      }874      return;875    }876    case ClassComponent: {877      safelyDetachRef(current);878      const instance = current.stateNode;879      if (typeof instance.componentWillUnmount === 'function') {880        safelyCallComponentWillUnmount(current, instance);881      }882      return;883    }884    case HostComponent: {885      safelyDetachRef(current);886      return;887    }888    case HostPortal: {889      // TODO: this is recursive.890      // We are also not using this parent because891      // the portal will get pushed immediately.892      if (supportsMutation) {893        unmountHostComponents(finishedRoot, current, renderPriorityLevel);894      } else if (supportsPersistence) {895        emptyPortalContainer(current);896      }897      return;898    }899    case FundamentalComponent: {900      if (enableFundamentalAPI) {901        const fundamentalInstance = current.stateNode;902        if (fundamentalInstance !== null) {903          unmountFundamentalComponent(fundamentalInstance);904          current.stateNode = null;905        }906      }907      return;908    }909    case DehydratedFragment: {910      if (enableSuspenseCallback) {911        const hydrationCallbacks = finishedRoot.hydrationCallbacks;912        if (hydrationCallbacks !== null) {913          const onDeleted = hydrationCallbacks.onDeleted;914          if (onDeleted) {915            onDeleted((current.stateNode                  ));916          }917        }918      }919      return;920    }921    case ScopeComponent: {922      if (enableScopeAPI) {923        safelyDetachRef(current);924      }925      return;926    }927  }928}929function commitNestedUnmounts(930  finishedRoot           ,931  root       ,932  renderPriorityLevel                    ,933)       {934  // While we're inside a removed host node we don't want to call935  // removeChild on the inner nodes because they're removed by the top936  // call anyway. We also want to call componentWillUnmount on all937  // composites before this host node is removed from the tree. Therefore938  // we do an inner loop while we're still inside the host node.939  let node        = root;940  while (true) {941    commitUnmount(finishedRoot, node, renderPriorityLevel);942    // Visit children because they may contain more composite or host nodes.943    // Skip portals because commitUnmount() currently visits them recursively.944    if (945      node.child !== null &&946      // If we use mutation we drill down into portals using commitUnmount above.947      // If we don't use mutation we drill down into portals here instead.948      (!supportsMutation || node.tag !== HostPortal)949    ) {950      node.child.return = node;951      node = node.child;952      continue;953    }954    if (node === root) {955      return;956    }957    while (node.sibling === null) {958      if (node.return === null || node.return === root) {959        return;960      }961      node = node.return;962    }963    node.sibling.return = node.return;964    node = node.sibling;965  }966}967function detachFiberMutation(fiber       ) {968  // Cut off the return pointers to disconnect it from the tree. Ideally, we969  // should clear the child pointer of the parent alternate to let this970  // get GC:ed but we don't know which for sure which parent is the current971  // one so we'll settle for GC:ing the subtree of this child. This child972  // itself will be GC:ed when the parent updates the next time.973  // Note: we cannot null out sibling here, otherwise it can cause issues974  // with findDOMNode and how it requires the sibling field to carry out975  // traversal in a later effect. See PR #16820. We now clear the sibling976  // field after effects, see: detachFiberAfterEffects.977  //978  // Don't disconnect stateNode now; it will be detached in detachFiberAfterEffects.979  // It may be required if the current component is an error boundary,980  // and one of its descendants throws while unmounting a passive effect.981  fiber.alternate = null;982  fiber.child = null;983  fiber.dependencies = null;984  fiber.firstEffect = null;985  fiber.lastEffect = null;986  fiber.memoizedProps = null;987  fiber.memoizedState = null;988  fiber.pendingProps = null;989  fiber.return = null;990  fiber.updateQueue = null;991  if (__DEV__) {992    fiber._debugOwner = null;993  }994}995function emptyPortalContainer(current       ) {996  if (!supportsPersistence) {997    return;998  }999  const portal   1000                             1001                              1002       1003    = current.stateNode;1004  const {containerInfo} = portal;1005  const emptyChildSet = createContainerChildSet(containerInfo);1006  replaceContainerChildren(containerInfo, emptyChildSet);1007}1008function commitContainer(finishedWork       ) {1009  if (!supportsPersistence) {1010    return;1011  }1012  switch (finishedWork.tag) {1013    case ClassComponent:1014    case HostComponent:1015    case HostText:1016    case FundamentalComponent: {1017      return;1018    }1019    case HostRoot:1020    case HostPortal: {1021      const portalOrRoot   1022                                 1023                                  1024           1025        = finishedWork.stateNode;1026      const {containerInfo, pendingChildren} = portalOrRoot;1027      replaceContainerChildren(containerInfo, pendingChildren);1028      return;1029    }1030  }1031  invariant(1032    false,1033    'This unit of work tag should not have side-effects. This error is ' +1034      'likely caused by a bug in React. Please file an issue.',1035  );1036}1037function getHostParentFiber(fiber       )        {1038  let parent = fiber.return;1039  while (parent !== null) {1040    if (isHostParent(parent)) {1041      return parent;1042    }1043    parent = parent.return;1044  }1045  invariant(1046    false,1047    'Expected to find a host parent. This error is likely caused by a bug ' +1048      'in React. Please file an issue.',1049  );1050}1051function isHostParent(fiber       )          {1052  return (1053    fiber.tag === HostComponent ||1054    fiber.tag === HostRoot ||1055    fiber.tag === HostPortal1056  );1057}1058function getHostSibling(fiber       )            {1059  // We're going to search forward into the tree until we find a sibling host1060  // node. Unfortunately, if multiple insertions are done in a row we have to1061  // search past them. This leads to exponential search for the next sibling.1062  // TODO: Find a more efficient way to do this.1063  let node        = fiber;1064  siblings: while (true) {1065    // If we didn't find anything, let's try the next sibling.1066    while (node.sibling === null) {1067      if (node.return === null || isHostParent(node.return)) {1068        // If we pop out of the root or hit the parent the fiber we are the1069        // last sibling.1070        return null;1071      }1072      node = node.return;1073    }1074    node.sibling.return = node.return;1075    node = node.sibling;1076    while (1077      node.tag !== HostComponent &&1078      node.tag !== HostText &&1079      node.tag !== DehydratedFragment1080    ) {1081      // If it is not host node and, we might have a host node inside it.1082      // Try to search down until we find one.1083      if (node.flags & Placement) {1084        // If we don't have a child, try the siblings instead.1085        continue siblings;1086      }1087      // If we don't have a child, try the siblings instead.1088      // We also skip portals because they are not part of this host tree.1089      if (node.child === null || node.tag === HostPortal) {1090        continue siblings;1091      } else {1092        node.child.return = node;1093        node = node.child;1094      }1095    }1096    // Check if this host node is stable or about to be placed.1097    if (!(node.flags & Placement)) {1098      // Found it!1099      return node.stateNode;1100    }1101  }1102}1103function commitPlacement(finishedWork       )       {1104  if (!supportsMutation) {1105    return;1106  }1107  // Recursively insert all host nodes into the parent.1108  const parentFiber = getHostParentFiber(finishedWork);1109  // Note: these two variables *must* always be updated together.1110  let parent;1111  let isContainer;1112  const parentStateNode = parentFiber.stateNode;1113  switch (parentFiber.tag) {1114    case HostComponent:1115      parent = parentStateNode;1116      isContainer = false;1117      break;1118    case HostRoot:1119      parent = parentStateNode.containerInfo;1120      isContainer = true;1121      break;1122    case HostPortal:1123      parent = parentStateNode.containerInfo;1124      isContainer = true;1125      break;1126    case FundamentalComponent:1127      if (enableFundamentalAPI) {1128        parent = parentStateNode.instance;1129        isContainer = false;1130      }1131    // eslint-disable-next-line-no-fallthrough1132    default:1133      invariant(1134        false,1135        'Invalid host parent fiber. This error is likely caused by a bug ' +1136          'in React. Please file an issue.',1137      );1138  }1139  if (parentFiber.flags & ContentReset) {1140    // Reset the text content of the parent before doing any insertions1141    resetTextContent(parent);1142    // Clear ContentReset from the effect tag1143    parentFiber.flags &= ~ContentReset;1144  }1145  const before = getHostSibling(finishedWork);1146  // We only have the top Fiber that was inserted but we need to recurse down its1147  // children to find all the terminal nodes.1148  if (isContainer) {1149    insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);1150  } else {1151    insertOrAppendPlacementNode(finishedWork, before, parent);1152  }1153}1154function insertOrAppendPlacementNodeIntoContainer(1155  node       ,1156  before           ,1157  parent           ,1158)       {1159  const {tag} = node;1160  const isHost = tag === HostComponent || tag === HostText;1161  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1162    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1163    if (before) {1164      insertInContainerBefore(parent, stateNode, before);1165    } else {1166      appendChildToContainer(parent, stateNode);1167    }1168  } else if (tag === HostPortal) {1169    // If the insertion itself is a portal, then we don't want to traverse1170    // down its children. Instead, we'll get insertions from each child in1171    // the portal directly.1172  } else {1173    const child = node.child;1174    if (child !== null) {1175      insertOrAppendPlacementNodeIntoContainer(child, before, parent);1176      let sibling = child.sibling;1177      while (sibling !== null) {1178        insertOrAppendPlacementNodeIntoContainer(sibling, before, parent);1179        sibling = sibling.sibling;1180      }1181    }1182  }1183}1184function insertOrAppendPlacementNode(1185  node       ,1186  before           ,1187  parent          ,1188)       {1189  const {tag} = node;1190  const isHost = tag === HostComponent || tag === HostText;1191  if (isHost || (enableFundamentalAPI && tag === FundamentalComponent)) {1192    const stateNode = isHost ? node.stateNode : node.stateNode.instance;1193    if (before) {1194      insertBefore(parent, stateNode, before);1195    } else {1196      appendChild(parent, stateNode);1197    }1198  } else if (tag === HostPortal) {1199    // If the insertion itself is a portal, then we don't want to traverse1200    // down its children. Instead, we'll get insertions from each child in1201    // the portal directly.1202  } else {1203    const child = node.child;1204    if (child !== null) {1205      insertOrAppendPlacementNode(child, before, parent);1206      let sibling = child.sibling;1207      while (sibling !== null) {1208        insertOrAppendPlacementNode(sibling, before, parent);1209        sibling = sibling.sibling;1210      }1211    }1212  }1213}1214function unmountHostComponents(1215  finishedRoot           ,1216  current       ,1217  renderPriorityLevel                    ,1218)       {1219  // We only have the top Fiber that was deleted but we need to recurse down its1220  // children to find all the terminal nodes.1221  let node        = current;1222  // Each iteration, currentParent is populated with node's host parent if not1223  // currentParentIsValid.1224  let currentParentIsValid = false;1225  // Note: these two variables *must* always be updated together.1226  let currentParent;1227  let currentParentIsContainer;1228  while (true) {1229    if (!currentParentIsValid) {1230      let parent = node.return;1231      findParent: while (true) {1232        invariant(1233          parent !== null,1234          'Expected to find a host parent. This error is likely caused by ' +1235            'a bug in React. Please file an issue.',1236        );1237        const parentStateNode = parent.stateNode;1238        switch (parent.tag) {1239          case HostComponent:1240            currentParent = parentStateNode;1241            currentParentIsContainer = false;1242            break findParent;1243          case HostRoot:1244            currentParent = parentStateNode.containerInfo;1245            currentParentIsContainer = true;1246            break findParent;1247          case HostPortal:1248            currentParent = parentStateNode.containerInfo;1249            currentParentIsContainer = true;1250            break findParent;1251          case FundamentalComponent:1252            if (enableFundamentalAPI) {1253              currentParent = parentStateNode.instance;1254              currentParentIsContainer = false;1255            }1256        }1257        parent = parent.return;1258      }1259      currentParentIsValid = true;1260    }1261    if (node.tag === HostComponent || node.tag === HostText) {1262      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1263      // After all the children have unmounted, it is now safe to remove the1264      // node from the tree.1265      if (currentParentIsContainer) {1266        removeChildFromContainer(1267          ((currentParent     )           ),1268          (node.stateNode                         ),1269        );1270      } else {1271        removeChild(1272          ((currentParent     )          ),1273          (node.stateNode                         ),1274        );1275      }1276      // Don't visit children because we already visited them.1277    } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {1278      const fundamentalNode = node.stateNode.instance;1279      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel);1280      // After all the children have unmounted, it is now safe to remove the1281      // node from the tree.1282      if (currentParentIsContainer) {1283        removeChildFromContainer(1284          ((currentParent     )           ),1285          (fundamentalNode          ),1286        );1287      } else {1288        removeChild(1289          ((currentParent     )          ),1290          (fundamentalNode          ),1291        );1292      }1293    } else if (1294      enableSuspenseServerRenderer &&1295      node.tag === DehydratedFragment1296    ) {1297      if (enableSuspenseCallback) {1298        const hydrationCallbacks = finishedRoot.hydrationCallbacks;1299        if (hydrationCallbacks !== null) {1300          const onDeleted = hydrationCallbacks.onDeleted;1301          if (onDeleted) {1302            onDeleted((node.stateNode                  ));1303          }1304        }1305      }1306      // Delete the dehydrated suspense boundary and all of its content.1307      if (currentParentIsContainer) {1308        clearSuspenseBoundaryFromContainer(1309          ((currentParent     )           ),1310          (node.stateNode                  ),1311        );1312      } else {1313        clearSuspenseBoundary(1314          ((currentParent     )          ),1315          (node.stateNode                  ),1316        );1317      }1318    } else if (node.tag === HostPortal) {1319      if (node.child !== null) {1320        // When we go into a portal, it becomes the parent to remove from.1321        // We will reassign it back when we pop the portal on the way up.1322        currentParent = node.stateNode.containerInfo;1323        currentParentIsContainer = true;1324        // Visit children because portals might contain host components.1325        node.child.return = node;1326        node = node.child;1327        continue;1328      }1329    } else {1330      commitUnmount(finishedRoot, node, renderPriorityLevel);1331      // Visit children because we may find more host components below.1332      if (node.child !== null) {1333        node.child.return = node;1334        node = node.child;1335        continue;1336      }1337    }1338    if (node === current) {1339      return;1340    }1341    while (node.sibling === null) {1342      if (node.return === null || node.return === current) {1343        return;1344      }1345      node = node.return;1346      if (node.tag === HostPortal) {1347        // When we go out of the portal, we need to restore the parent.1348        // Since we don't keep a stack of them, we will search for it.1349        currentParentIsValid = false;1350      }1351    }1352    node.sibling.return = node.return;1353    node = node.sibling;1354  }1355}1356function commitDeletion(1357  finishedRoot           ,1358  current       ,1359  renderPriorityLevel                    ,1360)       {1361  if (supportsMutation) {1362    // Recursively delete all host nodes from the parent.1363    // Detach refs and call componentWillUnmount() on the whole subtree.1364    unmountHostComponents(finishedRoot, current, renderPriorityLevel);1365  } else {1366    // Detach refs and call componentWillUnmount() on the whole subtree.1367    commitNestedUnmounts(finishedRoot, current, renderPriorityLevel);1368  }1369  const alternate = current.alternate;1370  detachFiberMutation(current);1371  if (alternate !== null) {1372    detachFiberMutation(alternate);1373  }1374}1375function commitWork(current              , finishedWork       )       {1376  if (!supportsMutation) {1377    switch (finishedWork.tag) {1378      case FunctionComponent:1379      case ForwardRef:1380      case MemoComponent:1381      case SimpleMemoComponent:1382      case Block: {1383        // Layout effects are destroyed during the mutation phase so that all1384        // destroy functions for all fibers are called before any create functions.1385        // This prevents sibling component effects from interfering with each other,1386        // e.g. a destroy function in one component should never override a ref set1387        // by a create function in another component during the same commit.1388        if (1389          enableProfilerTimer &&1390          enableProfilerCommitHooks &&1391          finishedWork.mode & ProfileMode1392        ) {1393          try {1394            startLayoutEffectTimer();1395            commitHookEffectListUnmount(1396              HookLayout | HookHasEffect,1397              finishedWork,1398            );1399          } finally {1400            recordLayoutEffectDuration(finishedWork);1401          }1402        } else {1403          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1404        }1405        return;1406      }1407      case Profiler: {1408        return;1409      }1410      case SuspenseComponent: {1411        commitSuspenseComponent(finishedWork);1412        attachSuspenseRetryListeners(finishedWork);1413        return;1414      }1415      case SuspenseListComponent: {1416        attachSuspenseRetryListeners(finishedWork);1417        return;1418      }1419      case HostRoot: {1420        if (supportsHydration) {1421          const root            = finishedWork.stateNode;1422          if (root.hydrate) {1423            // We've just hydrated. No need to hydrate again.1424            root.hydrate = false;1425            commitHydratedContainer(root.containerInfo);1426          }1427        }1428        break;1429      }1430      case OffscreenComponent:1431      case LegacyHiddenComponent: {1432        return;1433      }1434    }1435    commitContainer(finishedWork);1436    return;1437  }1438  switch (finishedWork.tag) {1439    case FunctionComponent:1440    case ForwardRef:1441    case MemoComponent:1442    case SimpleMemoComponent:1443    case Block: {1444      // Layout effects are destroyed during the mutation phase so that all1445      // destroy functions for all fibers are called before any create functions.1446      // This prevents sibling component effects from interfering with each other,1447      // e.g. a destroy function in one component should never override a ref set1448      // by a create function in another component during the same commit.1449      if (1450        enableProfilerTimer &&1451        enableProfilerCommitHooks &&1452        finishedWork.mode & ProfileMode1453      ) {1454        try {1455          startLayoutEffectTimer();1456          commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1457        } finally {1458          recordLayoutEffectDuration(finishedWork);1459        }1460      } else {1461        commitHookEffectListUnmount(HookLayout | HookHasEffect, finishedWork);1462      }1463      return;1464    }1465    case ClassComponent: {1466      return;1467    }1468    case HostComponent: {1469      const instance           = finishedWork.stateNode;1470      if (instance != null) {1471        // Commit the work prepared earlier.1472        const newProps = finishedWork.memoizedProps;1473        // For hydration we reuse the update path but we treat the oldProps1474        // as the newProps. The updatePayload will contain the real change in1475        // this case.1476        const oldProps = current !== null ? current.memoizedProps : newProps;1477        const type = finishedWork.type;1478        // TODO: Type the updateQueue to be specific to host components.1479        const updatePayload                       = (finishedWork.updateQueue     );1480        finishedWork.updateQueue = null;1481        if (updatePayload !== null) {1482          commitUpdate(1483            instance,1484            updatePayload,1485            type,1486            oldProps,1487            newProps,1488            finishedWork,1489          );1490        }1491      }1492      return;1493    }1494    case HostText: {1495      invariant(1496        finishedWork.stateNode !== null,1497        'This should have a text node initialized. This error is likely ' +1498          'caused by a bug in React. Please file an issue.',1499      );1500      const textInstance               = finishedWork.stateNode;1501      const newText         = finishedWork.memoizedProps;1502      // For hydration we reuse the update path but we treat the oldProps1503      // as the newProps. The updatePayload will contain the real change in1504      // this case.1505      const oldText         =1506        current !== null ? current.memoizedProps : newText;1507      commitTextUpdate(textInstance, oldText, newText);1508      return;1509    }1510    case HostRoot: {1511      if (supportsHydration) {1512        const root            = finishedWork.stateNode;1513        if (root.hydrate) {1514          // We've just hydrated. No need to hydrate again.1515          root.hydrate = false;1516          commitHydratedContainer(root.containerInfo);1517        }1518      }1519      return;1520    }1521    case Profiler: {1522      return;1523    }1524    case SuspenseComponent: {1525      commitSuspenseComponent(finishedWork);1526      attachSuspenseRetryListeners(finishedWork);1527      return;1528    }1529    case SuspenseListComponent: {1530      attachSuspenseRetryListeners(finishedWork);1531      return;1532    }1533    case IncompleteClassComponent: {1534      return;1535    }1536    case FundamentalComponent: {1537      if (enableFundamentalAPI) {1538        const fundamentalInstance = finishedWork.stateNode;1539        updateFundamentalComponent(fundamentalInstance);1540        return;1541      }1542      break;1543    }1544    case ScopeComponent: {1545      if (enableScopeAPI) {1546        const scopeInstance = finishedWork.stateNode;1547        prepareScopeUpdate(scopeInstance, finishedWork);1548        return;1549      }1550      break;1551    }1552    case OffscreenComponent:1553    case LegacyHiddenComponent: {1554      const newState                        = finishedWork.memoizedState;1555      const isHidden = newState !== null;1556      hideOrUnhideAllChildren(finishedWork, isHidden);1557      return;1558    }1559  }1560  invariant(1561    false,1562    'This unit of work tag should not have side-effects. This error is ' +1563      'likely caused by a bug in React. Please file an issue.',1564  );1565}1566function commitSuspenseComponent(finishedWork       ) {1567  const newState                       = finishedWork.memoizedState;1568  if (newState !== null) {1569    markCommitTimeOfFallback();1570    if (supportsMutation) {1571      // Hide the Offscreen component that contains the primary children. TODO:1572      // Ideally, this effect would have been scheduled on the Offscreen fiber1573      // itself. That's how unhiding works: the Offscreen component schedules an1574      // effect on itself. However, in this case, the component didn't complete,1575      // so the fiber was never added to the effect list in the normal path. We1576      // could have appended it to the effect list in the Suspense component's1577      // second pass, but doing it this way is less complicated. This would be1578      // simpler if we got rid of the effect list and traversed the tree, like1579      // we're planning to do.1580      const primaryChildParent        = (finishedWork.child     );1581      hideOrUnhideAllChildren(primaryChildParent, true);1582    }1583  }1584  if (enableSuspenseCallback && newState !== null) {1585    const suspenseCallback = finishedWork.memoizedProps.suspenseCallback;1586    if (typeof suspenseCallback === 'function') {1587      const wakeables                       = (finishedWork.updateQueue     );1588      if (wakeables !== null) {1589        suspenseCallback(new Set(wakeables));1590      }1591    } else if (__DEV__) {1592      if (suspenseCallback !== undefined) {1593        console.error('Unexpected type for suspenseCallback.');1594      }1595    }1596  }1597}1598function commitSuspenseHydrationCallbacks(1599  finishedRoot           ,1600  finishedWork       ,1601) {1602  if (!supportsHydration) {1603    return;1604  }1605  const newState                       = finishedWork.memoizedState;1606  if (newState === null) {1607    const current = finishedWork.alternate;1608    if (current !== null) {1609      const prevState                       = current.memoizedState;1610      if (prevState !== null) {1611        const suspenseInstance = prevState.dehydrated;1612        if (suspenseInstance !== null) {1613          commitHydratedSuspenseInstance(suspenseInstance);1614          if (enableSuspenseCallback) {1615            const hydrationCallbacks = finishedRoot.hydrationCallbacks;1616            if (hydrationCallbacks !== null) {1617              const onHydrated = hydrationCallbacks.onHydrated;1618              if (onHydrated) {1619                onHydrated(suspenseInstance);1620              }1621            }1622          }1623        }1624      }1625    }1626  }1627}1628function attachSuspenseRetryListeners(finishedWork       ) {1629  // If this boundary just timed out, then it will have a set of wakeables.1630  // For each wakeable, attach a listener so that when it resolves, React1631  // attempts to re-render the boundary in the primary (pre-timeout) state.1632  const wakeables                       = (finishedWork.updateQueue     );1633  if (wakeables !== null) {1634    finishedWork.updateQueue = null;1635    let retryCache = finishedWork.stateNode;1636    if (retryCache === null) {1637      retryCache = finishedWork.stateNode = new PossiblyWeakSet();1638    }1639    wakeables.forEach(wakeable => {1640      // Memoize using the boundary fiber to prevent redundant listeners.1641      let retry = resolveRetryWakeable.bind(null, finishedWork, wakeable);1642      if (!retryCache.has(wakeable)) {1643        if (enableSchedulerTracing) {1644          if (wakeable.__reactDoNotTraceInteractions !== true) {1645            retry = Schedule_tracing_wrap(retry);1646          }1647        }1648        retryCache.add(wakeable);1649        wakeable.then(retry, retry);1650      }1651    });1652  }1653}1654// This function detects when a Suspense boundary goes from visible to hidden.1655// It returns false if the boundary is already hidden.1656// TODO: Use an effect tag.1657export function isSuspenseBoundaryBeingHidden(1658  current              ,1659  finishedWork       ,1660)          {1661  if (current !== null) {1662    const oldState                       = current.memoizedState;1663    if (oldState === null || oldState.dehydrated !== null) {1664      const newState                       = finishedWork.memoizedState;1665      return newState !== null && newState.dehydrated === null;1666    }1667  }1668  return false;1669}1670function commitResetTextContent(current       ) {1671  if (!supportsMutation) {1672    return;1673  }1674  resetTextContent(current.stateNode);1675}1676export {1677  commitBeforeMutationLifeCycles,1678  commitResetTextContent,1679  commitPlacement,1680  commitDeletion,1681  commitWork,1682  commitLifeCycles,1683  commitAttachRef,1684  commitDetachRef,...

FiberCommitWork.js

Source:FiberCommitWork.js

1import{2 HostRoot,3 HostText,4 HostComponent,5 FunctionComponent,6 BeforeMutationMask,7 MutationMask,8 NoFlags,9 ContentReset,10 Placement,11 Update,12 PlacementAndUpdate,13 LayoutMask,14 SuspenseComponent,15 OffscreenComponent,16 ChildDeletion,17 PassiveMask,18 Passive,19 HookPassive,20 HookHasEffect21} from '@Jeact/shared/Constants';22import {23    resolveRetryWakeable24} from '@Jeact/vDOM/FiberWorkLoop';25import {26    updateFiberProps,27    detachDeletedInstance28} from '@Jeact/vDOM/DOMComponentTree';29import { updateDOMProperties } from '@Jeact/vDOM/DOMComponent'30let nextEffect = null;31export function commitBeforeMutationEffects(firstChild){32    nextEffect = firstChild;33    commitBeforeMutationEffects_begin();34}35function commitBeforeMutationEffects_begin(){36    while(nextEffect !== null){37        const fiber = nextEffect;38        const deletions = fiber.deletions;39        if(deletions !== null){40            for (let i = 0; i < deletions.length; i++){41                const deletion = deletions[i];42                // commitBeforeMutationEffectsDeletion(deletion);43            }44        }45        const child = fiber.child;46        if(47            (fiber.subtreeFlags & BeforeMutationMask) !== NoFlags &&48            child !== null49        ){50            nextEffect = child;51        } else {52            commitBeforeMutationEffects_complete();53        }54    }55}56function commitBeforeMutationEffects_complete(){57    while(nextEffect !== null){58        const fiber = nextEffect;59        commitBeforeMutationEffectsOnFiber(fiber);60        const sibling = fiber.sibling;61        if(sibling !== null){62            nextEffect = sibling;63            return;64        }65        nextEffect = fiber.return;66    }67}68function commitBeforeMutationEffectsOnFiber(finishedWork){69    const current = finishedWork.alternate;70    const flags = finishedWork.flags;71}72function commitHookEffectListUnmount(73    flags, 74    finishedWork, 75    nearestMountedAncestor76){77    const updateQueue = finishedWork.updateQueue;78    const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;79    if (lastEffect !== null){80        const firstEffect = lastEffect.next;81        let effect = firstEffect;82        do {83            if ((effect.tag & flags) === flags){84                // unmount85                const destroy = effect.destroy;86                effect.destroy = undefined;87                if (destroy !== undefined){88                     destroy();89                }90            }91            effect = effect.next;92        } while (effect !== firstEffect);93    }94}95function commitHookEffectListMount(tag, finishedWork){96    const updateQueue = finishedWork.updateQueue;97    const lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;98    if (lastEffect !== null){99        const firstEffect = lastEffect.next;100        let effect = firstEffect;101        do {102            if ((effect.tag & tag) === tag){103                // Mount104                const create = effect.create;105                effect.destroy = create();106            }107            effect = effect.next;108        } while(effect !== firstEffect);109    }110}111function attachSuspenseRetryListeners(finishedWork){112  const wakeables = finishedWork.updateQueue;113  if (wakeables !== null){114    finishedWork.updateQueue = null;115    let retryCache = finishedWork.stateNode;116    if(retryCache === null){117      retryCache = finishedWork.stateNode = new WeakSet()118    }119    wakeables.forEach(wakeable => {120      const retry = resolveRetryWakeable.bind(null, finishedWork, wakeable);121        if(!retryCache.has(wakeable)){122          retryCache.add(wakeable);123          wakeable.then(retry, retry); 124        }125    })126  }127}128export function commitMutationEffects(root,firstChild){129    nextEffect = firstChild;130    commitMutationEffects_begin(root);131}132function commitMutationEffects_begin(root){133    while(nextEffect !== null){134        const fiber = nextEffect;135        const deletions = fiber.deletions;136        if(deletions !==null ){137            for (let i = 0; i < deletions.length; i++){138                const childToDelete = deletions[i];139                commitDeletion(root, childToDelete, fiber);140            }141        }142        const child = fiber.child;143        if((fiber.subtreeFlags & MutationMask) !== NoFlags && child !== null){144            nextEffect = child;145        } else {146            commitMutationEffects_complete(root);147        }148    }149}150function commitMutationEffects_complete(root){151    while(nextEffect !== null){152        const fiber = nextEffect;153        commitMutationEffectsOnFiber(fiber, root);154        const sibling = fiber.sibling;155        if (sibling !== null){156            nextEffect = sibling;157            return;158        }159        nextEffect = fiber.return;160    }161}162function commitMutationEffectsOnFiber(finishedWork, root){163    const flags = finishedWork.flags;164    const primaryFlags = flags & (Placement | Update);165    switch(primaryFlags){166        case Placement:{167            commitPlacement(finishedWork);168            finishedWork.flags &= ~Placement;169            break;170        }171        case PlacementAndUpdate:{172            // Placement173            commitPlacement(finishedWork);174            finishedWork.flags &= ~Placement;175            //Update176            const current = finishedWork.alternate;177            commitWork(current, finishedWork);178            break;179        }180        case Update:{181            const current = finishedWork.alternate;182            commitWork(current, finishedWork);183            break;184        }185    }186}187export function commitLayoutEffects(finishedWork, root, committedLanes){188    nextEffect = finishedWork;189    commitLayoutEffects_begin(finishedWork, root, committedLanes);190}191function commitLayoutEffects_begin(subtreeRoot, root, committedLanes){192    while (nextEffect !== null){193        const fiber = nextEffect;194        const firstChild = fiber.child;195        if ((fiber.subtreeFlags & LayoutMask) !== NoFlags && firstChild !== null){196            nextEffect = firstChild;197        } else {198            commitLayoutMountEffects_complete(subtreeRoot, root, committedLanes);199        }200    }201}202function commitLayoutMountEffects_complete(subtreeRoot, root, committedLanes){203    while (nextEffect !== null){204        const fiber = nextEffect;205        if((fiber.flags & LayoutMask) !== NoFlags){206            const current = fiber.alternate;207            commitLayoutEffectOnFiber(root, current, fiber, committedLanes);208        }209        if (fiber === subtreeRoot){210            nextEffect = null;211            return;212        }213        const sibling = fiber.sibling;214        if (sibling !== null){215            nextEffect = sibling;216            return;217        }218        nextEffect = fiber.return;219    }220}221export function commitPassiveMountEffects(root, finishedWork){222    nextEffect = finishedWork;223    commitPassiveMountEffects_begin(finishedWork, root);224}225function commitPassiveMountEffects_begin(subtreeRoot, root){226    while(nextEffect!== null){227        const fiber = nextEffect;228        const firstChild = fiber.child;229        if ((fiber.subtreeFlags & PassiveMask) !== NoFlags && firstChild !== null){230            nextEffect = firstChild;231        } else {232            commitPassiveMountEffects_complete(subtreeRoot, root);233        }234    }235}236function commitPassiveMountEffects_complete(subtreeRoot, root){237    while(nextEffect !== null){238        const fiber = nextEffect;239        if ((fiber.flags & Passive) !== NoFlags){240            commitPassiveMountEffectsOnFiber(root, fiber);241        }242        if (fiber === subtreeRoot){243            nextEffect = null;244            return ;245        }246        const sibling = fiber.sibling;247        if (sibling !== null){248            nextEffect = sibling;249            return;250        }251        nextEffect = fiber.return;252    }253}254function commitPassiveMountOnFiber(finishedRoot, finishedWork){255    switch(finishedWork.tag){256        case FunctionComponent:{257            commitHookEffectListMount(258                HookPassive | HookHasEffect, 259                finishedWork260            );261            break;262        }263    }264}265function commitLayoutEffectOnFiber(finishedRoot, current, finishedWork, committedLanes){266    if ((finishedWork.flags & Update) !== NoFlags){267        switch(finishedWork.tag){268            default:269                break;270        }271    }272}273export function commitPassiveUnmountEffects(firstChild){274    nextEffect = firstChild;275    commitPassiveUnmountEffects_begin();276}277function commitPassiveUnmountEffects_begin(){278    while(nextEffect !== null){279        const fiber = nextEffect;280        const child = fiber.child;281        if ((nextEffect.flags & ChildDeletion) !== NoFlags){282            const deletions = fiber.deletions;283            if(deletions !== null){284                for (let i = 0; i < deletions.length; i++){285                    const fiberToDel = deletions[i];286                    nextEffect = fiberToDel;287                    commitPassiveUnmountEffectsInDelTree_begin(288                        fiberToDel,289                        fiber,290                    )291                }292            }293        }294        if ((fiber.subtreeFlags & PassiveMask) !== NoFlags && child !== null){295            nextEffect = child;296        } else {297            commitPassiveUnmountEffects_complete();298        }299    }300}301function commitPassiveUnmountEffects_complete(){302    while (nextEffect !== null){303        const fiber = nextEffect;304        if ((fiber.flags & Passive) !== NoFlags){305            commitPassiveUnmountOnFiber(fiber);306        }307        const sibling = fiber.sibling;308        if (sibling !== null){309            nextEffect = sibling;310            return;311        }312        nextEffect = fiber.return;313    }314}315function commitPassiveUnmountOnFiber(finishedWork){316    switch(finishedWork.tag){317        case FunctionComponent:{318            commitHookEffectListUnmount(319                HookPassive | HookHasEffect,320                finishedWork,321                finishedWork.return322            )323        }324    }325}326function commitPassiveUnmountEffectsInDelTree_begin(327    deletedSubtreeRoot,328    nearestMountedAncestor329){330    while (nextEffect !== null){331        const fiber = nextEffect;332        333        commitPassiveUnmountEffectsInDelTreeOnFiber(334            fiber, 335            nearestMountedAncestor336        );337        const child = fiber.child;338        if (child !== null){339            nextEffect = child;340        } else {341            commitPassiveUnmountEffectsInDelTree_complete(342                deletedSubtreeRoot343            )344        }345    }346}347function commitPassiveUnmountEffectsInDelTree_complete(deletedSubtreeRoot){348    while (nextEffect !== null){349        const fiber = nextEffect;350        const sibling = fiber.sibling;351        const returnFiber = fiber.return;352        if (fiber === deletedSubtreeRoot){353            detachFiberAfterEffects(fiber);354            nextEffect = null;355            return;356        }357        if (sibling !== null){358            nextEffect = sibling;359            return;360        }361        nextEffect = returnFiber;362    }363}364function commitPassiveUnmountEffectsInDelTreeOnFiber(365    current, nearestMountedAncestor366){367    switch(current.tag){368        case FunctionComponent:{369            commitHookEffectListUnmount(370                HookPassive,371                current,372                nearestMountedAncestor373            );374            break;375        }376    }377}378function commitUnmount(finishedRoot, current, nearestMountedAncestor){379    switch(current.tag){380        case FunctionComponent:381        case HostComponent:382            return;383    }384}385function commitNestedUnmounts(finishedRoot, root, nearestMountedAncestor){386    let node = root;387    while(true){388        commitUnmount(finishedRoot, node, nearestMountedAncestor);389        if(node.child !== null){390            node.child.return = node;391            node = node.child;392            continue;393        }394        if (node === root){395            return;396        }397        while (node.sibling === null){398            if (node.return === null || node.return === root){399                return;400            }401            node = node.return;402        }403        node.sibling.return = node.return;404        node = node.sibling;405    }406}407function detachFiberMutation(fiber){408    const alternate = fiber.alternate;409    if (alternate !== null){410        alternate.return = null;411    }412    fiber.return = null;413}414function detachFiberAfterEffects(fiber){415    const alternate = fiber.alternate;416    if (alternate !== null){417        fiber.alternate = null;418        detachFiberAfterEffects(alternate);419    }420    fiber.child = null;421    fiber.deletions = null;422    fiber.sibling = null;423    if (fiber.tag === HostComponent){424        if(fiber.stateNode !== null){425            detachDeletedInstance(fiber.stateNode);426        }427    }428    fiber.stateNode = null;429}430function toggleAllChildren(finishedWork, isHidden){431  let hostSubtreeRoot = null;432  let node = finishedWork;433  while(true){434    if (node.tag === HostComponent){435      if(hostSubtreeRoot === null){436        hostSubtreeRoot = node;437        const instance = node.stateNode;438        if (isHidden){439          const style = instance.style;440          if(typeof style.setProperty === 'function'){441            style.setProperty('display', 'none', 'important');442          } else {443            style.display = 'none';444          }445        } else {446          instance.style.removeProperty('display');447        }448      }449    } else if (node.tag === HostText){450      if(hostSubtreeRoot === null){451        const instance = node.stateNode;452        if (isHidden){453            instance.nodeValue ='';454        } else {455            instance.nodeValue = node.memoizedProps;456        }457      }458    } else if(459      node.tag === OffscreenComponent &&460      node.memoizedState !== null &&461      node !== finishedWork462    ){463      debugger;464    } else if (node.child !== null){465        node.child.return = node;466        node = node.child;467        continue;468    }469    if (node == finishedWork){470        return;471    }472    while(node.sibling === null){473      if (node.return === null || node.return === finishedWork){474        return;475      }476      if(hostSubtreeRoot === node){477        hostSubtreeRoot = null;478      }479      node = node.return;480    }481    if(hostSubtreeRoot === node){482      hostSubtreeRoot = null;483    }484    node.sibling.return = node.return;485    node = node.sibling;486  }487}488function getHostParentFiber(fiber){489    let parent = fiber.return;490    while (parent!== null){491        if (isHostParent(parent)){492            return parent;493        }494        parent = parent.return;495    }496}497function isHostParent(fiber){498    return (499        fiber.tag === HostRoot ||500        fiber.tag === HostComponent501        );502}503function getHostSibling(fiber){504    let node = fiber;505    siblings: while (true){506        while(node.sibling === null){507            if (node.return === null || isHostParent(node.return)){508                return null;509            }510            node = node.return;511        }512        node.sibling.return = node.return;513        node = node.sibling;514        while (515            node.tag !== HostComponent &&516            node.tag !== HostText517        ){518            if (node.flags & Placement){519                continue siblings;520            }521            if (node.child === null){522                continue siblings;523            } else {524                node.child.return = node;525                node = node.child;526            }527        }528        if (!(node.flags & Placement)){529            return node.stateNode;530        }531    }532}533function commitPlacement(finishedWork){534    const parentFiber = getHostParentFiber(finishedWork);535    let parent;536    let isContainer;537    const parentStateNode = parentFiber.stateNode;538    switch(parentFiber.tag){539        case HostComponent:540            parent = parentStateNode;541            isContainer = false;542            break;543        case HostRoot:544            parent = parentStateNode.container;545            isContainer = true;546            break;547        default:548            console.error('Unknown parentFiber', parentFiber.tag);549    }550    const before = getHostSibling(finishedWork);551    if(isContainer){552        insertOrAppendPlacementNodeIntoContainer(finishedWork, before, parent);553    } else {554        insertOrAppendPlacementNode(finishedWork, before, parent);555    }556}557function insertOrAppendPlacementNodeIntoContainer(node, before, parent){558    const tag = node.tag;559    const isHost = tag === HostComponent || tag === HostText;560    if (isHost){561        const stateNode =node.stateNode;562        if (before){563            parent.insertBefore(stateNode, before)564        } else {565            parent.append(stateNode);566        }567    } else {568        const child = node.child;569        if (child !== null){570            insertOrAppendPlacementNodeIntoContainer(child, before, parent);571            let sibling = child.sibling;572            while (sibling !== null ){573                insertOrAppendPlacementNodeIntoContainer(574                    sibling, 575                    before, 576                parent);577                sibling = sibling.sibling;578            }579        }580    }581}582function insertOrAppendPlacementNode(node, before, parent){583    const tag = node.tag;584    const isHost = tag === HostComponent || tag === HostText;585    if (isHost){586        const stateNode = node.stateNode;587        if (before){588            parent.insertBefore(stateNode, before);589        } else {590            parent.append(stateNode);591        }592    } else {593        const child = node.child;594        if(child !== null){595            insertOrAppendPlacementNode(child, before, parent);596            let sibling = child.sibling;597            while(sibling !== null){598                insertOrAppendPlacementNode(sibling, before, parent);599                sibling = sibling.sibling;600            }601        }602    }603}604function unmountHostComponents(finishedRoot, current, nearestMountedAncestor){605    let node = current;606    let currentParentIsValid = false;607    let currentParent;608    let currentParentIsContainer;609    while(true){610        if (!currentParentIsValid){611            let parent = node.return;612            findParent: while(true){613                const parentStateNode = parent.stateNode;614                switch(parent.tag){615                    case HostComponent:616                        currentParent = parentStateNode;617                        currentParentIsContainer = false;618                        break findParent;619                    case HostRoot:620                        currentParent = parentStateNode.container;621                        currentParentIsContainer = true;622                        break findParent;623                }624                parent = parent.return;625            }626            currentParentIsValid = true;627        }628        if (node.tag === HostComponent || node.tag === HostText){629            commitNestedUnmounts(finishedRoot, node, nearestMountedAncestor);630            currentParent.removeChild(node.stateNode);631        } else {632            commitUnmount(finishedRoot, node, nearestMountedAncestor);633            if (node.child !== null){634                node.child.return = node;635                node = node.child;636                continue;637            }638        }639        if (node === current){640            return;641        }642        while (node.sibling === null){643            if (node.return === null || node.return === current){644                return;645            }646            node = node.return;647        }648        node.sibling.return = node.return;649        node = node.sibling;650    }651}652function commitDeletion(finishedRoot, current, nearestMountedAncestor){653    unmountHostComponents(finishedRoot, current, nearestMountedAncestor);654    detachFiberMutation(current);655}656function commitWork(current, finishedWork){657  switch(finishedWork.tag){658    case HostComponent:{659      const instance = finishedWork.stateNode;660      if (instance !== null){661        const newProps = finishedWork.memoizedProps;662        const oldProps = current !== null ? current.memoizedProps : newProps;663        const type = finishedWork.type;664        const updatePayload = finishedWork.updateQueue;665        finishedWork.updateQueue = null;666        if (updatePayload !== null){667          commitUpdate(668            instance,669            updatePayload,670            type,671            oldProps,672            newProps,673            finishedWork,674          )675        }676      }677      return;678    }679    case SuspenseComponent:{680      commitSuspenseComponent(finishedWork);681      attachSuspenseRetryListeners(finishedWork);682      return;683    }684    case OffscreenComponent:{685      const newState = finishedWork.memoizedState;686      const isHidden = newState !== null;687      toggleAllChildren(finishedWork, isHidden);688      return;689    }690    case HostText:{691      const textInstance = finishedWork.stateNode;692      const newText = finishedWork.memoizedProps;693      textInstance.nodeValue = newText;694    }695  }696}697function commitSuspenseComponent(finishedWork){698  const newState = finishedWork.memoizedState;699  if (newState !== null){700    const primaryChildParent = finishedWork.child;701    //hideOrUnhideAllChildren()702    toggleAllChildren(primaryChildParent, true); 703  }704}705function commitUpdate(706    domElement,707    updatePayload,708    type,709    oldProps,710    newProps,711    internalInstanceHandle712){713    updateFiberProps(domElement, newProps);714    updateDOMProperties(domElement, updatePayload);...

FiberWorkLoop.js

Source:FiberWorkLoop.js

...420    markRootUpdated(root, retryLane, eventTime);421    ensureRootIsScheduled(root, eventTime);422  }423}424export function resolveRetryWakeable(boundaryFiber, wakeable){425  let retryCache = boundaryFiber.stateNode;426  if(retryCache !== null){427    retryCache.delete(wakeable);428  }429  retryTimedOutBoundary(boundaryFiber);...

Using AI Code Generation

1const { chromium } = require('playwright');2(async () => {3  const browser = await chromium.launch();4  const context = await browser.newContext();5  const page = await context.newPage();6  await page.screenshot({ path: `example.png` });7  await browser.close();8})();9const { resolveRetryWakeable } = require('playwright');10module.exports = {11  use: {12    viewport: { width: 800, height: 600 },13  },14};15const { resolveRetryWakeable } = require('playwright');16module.exports = {17  use: {18    viewport: { width: 800, height: 600 },19  },20};21const { resolveRetryWakeable } = require('playwright');22module.exports = {23  use: {24    viewport: { width: 800, height: 600 },25  },26};27const { resolveRetryWakeable } = require('playwright');28module.exports = {29  use: {30    viewport: { width: 800, height: 600 },31  },32};33const { resolveRetryWakeable } = require('playwright');34module.exports = {35  use: {36    viewport: { width: 800, height: 600 },37  },38};

Using AI Code Generation

1const { resolveRetryWakeable } = require("@playwright/test/lib/server/wakeable");2const { chromium } = require("playwright");3(async () => {4  const browser = await chromium.launch();5  const context = await browser.newContext();6  const page = await context.newPage();7  const elementHandle = await page.$("text=Get Started");8  const wakeable = await elementHandle._retry();9  const retry = await resolveRetryWakeable(wakeable);10  console.log(retry);11  await browser.close();12})();

Using AI Code Generation

1const { resolveRetryWakeable } = require('playwright-core/lib/server/wakeable');2const { chromium } = require('playwright-core');3const browser = await chromium.launch();4const page = await browser.newPage();5await page.waitForSelector('a');6const wakeable = await page.waitForSelector('a');7const element = await resolveRetryWakeable(wakeable);8console.log(element);9await browser.close();10ElementHandle {11  _context: ExecutionContext {12    _page: Page {13      _browserContext: BrowserContext {14        _browser: Browser {15          _connection: Connection {16            _ws: WebSocket {…},17            _callbacks: Map {},18            _sessions: Map {},19            _sessionsIds: Map {},20            _dispatchQueue: Promise {},21            _crBrowserSessionPromise: Promise {},22            _crBrowserSessionClosePromise: Promise {},

Using AI Code Generation

1const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');2const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');3const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');4const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');5const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');6const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');7const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');8const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');9const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');10const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');11const { resolveRetryWakeable } = require('playwright/lib/internal/utils/utils');12const { resolve

Using AI Code Generation

1const {InternalHelper} = require('playwright/lib/server/helper.js');2const helper = new InternalHelper();3const wakeable = helper.resolveRetryWakeable(1000);4wakeable.then((value) => {5    console.log(value);6});7const {InternalHelper} = require('playwright/lib/server/helper.js');8const helper = new InternalHelper();9const wakeable = helper.resolveRetryWakeable(1000);10wakeable.then((value) => {11    console.log(value);12});13const {InternalHelper} = require('playwright/lib/server/helper.js');14const helper = new InternalHelper();15const wakeable = helper.resolveRetryWakeable(1000);16wakeable.then((value) => {17    console.log(value);18});19const {InternalHelper} = require('playwright/lib/server/helper.js');20const helper = new InternalHelper();21const wakeable = helper.resolveRetryWakeable(1000);22wakeable.then((value) => {23    console.log(value);24});25const {InternalHelper} = require('playwright/lib/server/helper.js');26const helper = new InternalHelper();27const wakeable = helper.resolveRetryWakeable(1000);28wakeable.then((value) => {29    console.log(value);30});31const {InternalHelper} = require('playwright/lib/server/helper.js');32const helper = new InternalHelper();33const wakeable = helper.resolveRetryWakeable(1000);34wakeable.then((value) => {35    console.log(value);36});37const {InternalHelper} = require('playwright

Using AI Code Generation

1const { resolveRetryWakeable } = require('playwright/lib/utils/utils');2const { PlaywrightTest } = require('@playwright/test');3const { test } = PlaywrightTest;4test('test', async ({ page }) => {5  await resolveRetryWakeable(() => page.isVisible('css=div'), false);6  await page.click('css=div');7});8Example: Wait for the element to be visible using waitForSelector()9const { test } = require('@playwright/test');10test('test', async ({ page }) => {11  await page.waitForSelector('css=div');12  await page.click('css=div');13});14Example: Wait for the element to be visible using waitForFunction()15const { test } = require('@playwright/test');16test('test', async ({ page }) => {17  await page.waitForFunction(() => document.querySelector('div').offsetWidth > 0);18  await page.click('css=div');19});20Example: Wait for the element to be visible using waitForTimeout()21const { test } = require('@playwright/test');22test('test', async ({ page }) => {23  await page.waitForTimeout(1000);24  await page.click('css=div');25});26Example: Wait for the element to be visible using waitForResponse()27const { test } = require('@playwright/test');28test('test', async ({ page }) => {29  await page.click('css=div');30});31Example: Wait for the element to be visible using waitForRequest()32const { test } = require('@playwright/test');33test('test', async ({ page }) => {34  await page.click('css=div');35});36Example: Wait for the element to be visible using waitForEvent()37const { test } = require('@playwright/test');

Using AI Code Generation

1const { resolveRetryWakeable } = require('playwright/lib/utils/utils');2const { TimeoutError } = require('playwright/lib/errors');3const { createTestServer } = require('playwright/lib/utils/testserver');4(async () => {5  const server = await createTestServer();6  server.setRoute('/sleep', async (req, res) => {7    res.setHeader('Content-Type', 'text/plain');8    res.write('hello ');9    await new Promise(f => setTimeout(f, 1000));10    res.end('world');11  });12  const url = server.PREFIX + '/sleep';13  const wakeable = new Promise(f => setTimeout(f, 1000));14  const timeout = 100;15  try {16    await resolveRetryWakeable(wakeable, async () => {17      await page.goto(url);18    }, timeout);19  } catch (e) {20    if (e instanceof TimeoutError)21      console.log('Error: Timeout');22  }23})();

Playwright tutorial

LambdaTest’s Playwright tutorial will give you a broader idea about the Playwright automation framework, its unique features, and use cases with examples to exceed your understanding of Playwright testing. This tutorial will give A to Z guidance, from installing the Playwright framework to some best practices and advanced concepts.

Chapters:

What is Playwright : Playwright is comparatively new but has gained good popularity. Get to know some history of the Playwright with some interesting facts connected with it.
How To Install Playwright : Learn in detail about what basic configuration and dependencies are required for installing Playwright and run a test. Get a step-by-step direction for installing the Playwright automation framework.
Playwright Futuristic Features: Launched in 2020, Playwright gained huge popularity quickly because of some obliging features such as Playwright Test Generator and Inspector, Playwright Reporter, Playwright auto-waiting mechanism and etc. Read up on those features to master Playwright testing.
What is Component Testing: Component testing in Playwright is a unique feature that allows a tester to test a single component of a web application without integrating them with other elements. Learn how to perform Component testing on the Playwright automation framework.
Inputs And Buttons In Playwright: Every website has Input boxes and buttons; learn about testing inputs and buttons with different scenarios and examples.
Functions and Selectors in Playwright: Learn how to launch the Chromium browser with Playwright. Also, gain a better understanding of some important functions like “BrowserContext,” which allows you to run multiple browser sessions, and “newPage” which interacts with a page.
Handling Alerts and Dropdowns in Playwright : Playwright interact with different types of alerts and pop-ups, such as simple, confirmation, and prompt, and different types of dropdowns, such as single selector and multi-selector get your hands-on with handling alerts and dropdown in Playright testing.
Playwright vs Puppeteer: Get to know about the difference between two testing frameworks and how they are different than one another, which browsers they support, and what features they provide.
Run Playwright Tests on LambdaTest: Playwright testing with LambdaTest leverages test performance to the utmost. You can run multiple Playwright tests in Parallel with the LammbdaTest test cloud. Get a step-by-step guide to run your Playwright test on the LambdaTest platform.
Playwright Python Tutorial: Playwright automation framework support all major languages such as Python, JavaScript, TypeScript, .NET and etc. However, there are various advantages to Python end-to-end testing with Playwright because of its versatile utility. Get the hang of Playwright python testing with this chapter.
Playwright End To End Testing Tutorial: Get your hands on with Playwright end-to-end testing and learn to use some exciting features such as TraceViewer, Debugging, Networking, Component testing, Visual testing, and many more.
Playwright Video Tutorial: Watch the video tutorials on Playwright testing from experts and get a consecutive in-depth explanation of Playwright automation testing.