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ReactFiberHooks.js
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ReactFiberHooks.js
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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow
*/
import type {
ReactContext,
StartTransitionOptions,
Usable,
Thenable,
RejectedThenable,
Awaited,
} from 'shared/ReactTypes';
import type {
Fiber,
FiberRoot,
Dispatcher,
HookType,
MemoCache,
} from './ReactInternalTypes';
import type {Lanes, Lane} from './ReactFiberLane';
import type {HookFlags} from './ReactHookEffectTags';
import type {Flags} from './ReactFiberFlags';
import type {TransitionStatus} from './ReactFiberConfig';
import {
HostTransitionContext,
NotPendingTransition as NoPendingHostTransition,
setCurrentUpdatePriority,
getCurrentUpdatePriority,
} from './ReactFiberConfig';
import ReactSharedInternals from 'shared/ReactSharedInternals';
import {
enableDebugTracing,
enableSchedulingProfiler,
enableCache,
enableLazyContextPropagation,
enableTransitionTracing,
enableUseMemoCacheHook,
enableUseEffectEventHook,
enableLegacyCache,
debugRenderPhaseSideEffectsForStrictMode,
enableAsyncActions,
disableLegacyMode,
enableNoCloningMemoCache,
enableContextProfiling,
} from 'shared/ReactFeatureFlags';
import {
REACT_CONTEXT_TYPE,
REACT_MEMO_CACHE_SENTINEL,
} from 'shared/ReactSymbols';
import {
NoMode,
ConcurrentMode,
DebugTracingMode,
StrictEffectsMode,
StrictLegacyMode,
NoStrictPassiveEffectsMode,
} from './ReactTypeOfMode';
import {
NoLane,
SyncLane,
OffscreenLane,
DeferredLane,
NoLanes,
isSubsetOfLanes,
includesBlockingLane,
includesOnlyNonUrgentLanes,
mergeLanes,
removeLanes,
intersectLanes,
isTransitionLane,
markRootEntangled,
includesSomeLane,
} from './ReactFiberLane';
import {
ContinuousEventPriority,
higherEventPriority,
} from './ReactEventPriorities';
import {
readContext,
readContextAndCompare,
checkIfContextChanged,
} from './ReactFiberNewContext';
import {HostRoot, CacheComponent, HostComponent} from './ReactWorkTags';
import {
LayoutStatic as LayoutStaticEffect,
Passive as PassiveEffect,
PassiveStatic as PassiveStaticEffect,
StaticMask as StaticMaskEffect,
Update as UpdateEffect,
StoreConsistency,
MountLayoutDev as MountLayoutDevEffect,
MountPassiveDev as MountPassiveDevEffect,
FormReset,
} from './ReactFiberFlags';
import {
HasEffect as HookHasEffect,
Layout as HookLayout,
Passive as HookPassive,
Insertion as HookInsertion,
} from './ReactHookEffectTags';
import {
getWorkInProgressRoot,
getWorkInProgressRootRenderLanes,
scheduleUpdateOnFiber,
requestUpdateLane,
requestDeferredLane,
markSkippedUpdateLanes,
isInvalidExecutionContextForEventFunction,
} from './ReactFiberWorkLoop';
import getComponentNameFromFiber from 'react-reconciler/src/getComponentNameFromFiber';
import is from 'shared/objectIs';
import isArray from 'shared/isArray';
import {
markWorkInProgressReceivedUpdate,
checkIfWorkInProgressReceivedUpdate,
} from './ReactFiberBeginWork';
import {
getIsHydrating,
tryToClaimNextHydratableFormMarkerInstance,
} from './ReactFiberHydrationContext';
import {logStateUpdateScheduled} from './DebugTracing';
import {
markStateUpdateScheduled,
setIsStrictModeForDevtools,
} from './ReactFiberDevToolsHook';
import {createCache} from './ReactFiberCacheComponent';
import {
createUpdate as createLegacyQueueUpdate,
enqueueUpdate as enqueueLegacyQueueUpdate,
entangleTransitions as entangleLegacyQueueTransitions,
} from './ReactFiberClassUpdateQueue';
import {
enqueueConcurrentHookUpdate,
enqueueConcurrentHookUpdateAndEagerlyBailout,
enqueueConcurrentRenderForLane,
} from './ReactFiberConcurrentUpdates';
import {getTreeId} from './ReactFiberTreeContext';
import {now} from './Scheduler';
import {
trackUsedThenable,
checkIfUseWrappedInTryCatch,
createThenableState,
} from './ReactFiberThenable';
import type {ThenableState} from './ReactFiberThenable';
import type {BatchConfigTransition} from './ReactFiberTracingMarkerComponent';
import {
peekEntangledActionLane,
peekEntangledActionThenable,
chainThenableValue,
} from './ReactFiberAsyncAction';
import {requestTransitionLane} from './ReactFiberRootScheduler';
import {isCurrentTreeHidden} from './ReactFiberHiddenContext';
import {requestCurrentTransition} from './ReactFiberTransition';
import {callComponentInDEV} from './ReactFiberCallUserSpace';
export type Update<S, A> = {
lane: Lane,
revertLane: Lane,
action: A,
hasEagerState: boolean,
eagerState: S | null,
next: Update<S, A>,
};
export type UpdateQueue<S, A> = {
pending: Update<S, A> | null,
lanes: Lanes,
dispatch: (A => mixed) | null,
lastRenderedReducer: ((S, A) => S) | null,
lastRenderedState: S | null,
};
let didWarnAboutMismatchedHooksForComponent;
let didWarnUncachedGetSnapshot: void | true;
let didWarnAboutUseWrappedInTryCatch;
let didWarnAboutAsyncClientComponent;
let didWarnAboutUseFormState;
if (__DEV__) {
didWarnAboutMismatchedHooksForComponent = new Set<string | null>();
didWarnAboutUseWrappedInTryCatch = new Set<string | null>();
didWarnAboutAsyncClientComponent = new Set<string | null>();
didWarnAboutUseFormState = new Set<string | null>();
}
export type Hook = {
memoizedState: any,
baseState: any,
baseQueue: Update<any, any> | null,
queue: any,
next: Hook | null,
};
// The effect "instance" is a shared object that remains the same for the entire
// lifetime of an effect. In Rust terms, a RefCell. We use it to store the
// "destroy" function that is returned from an effect, because that is stateful.
// The field is `undefined` if the effect is unmounted, or if the effect ran
// but is not stateful. We don't explicitly track whether the effect is mounted
// or unmounted because that can be inferred by the hiddenness of the fiber in
// the tree, i.e. whether there is a hidden Offscreen fiber above it.
//
// It's unfortunate that this is stored on a separate object, because it adds
// more memory per effect instance, but it's conceptually sound. I think there's
// likely a better data structure we could use for effects; perhaps just one
// array of effect instances per fiber. But I think this is OK for now despite
// the additional memory and we can follow up with performance
// optimizations later.
type EffectInstance = {
destroy: void | (() => void),
};
export type Effect = {
tag: HookFlags,
create: () => (() => void) | void,
inst: EffectInstance,
deps: Array<mixed> | null,
next: Effect,
};
type StoreInstance<T> = {
value: T,
getSnapshot: () => T,
};
type StoreConsistencyCheck<T> = {
value: T,
getSnapshot: () => T,
};
type EventFunctionPayload<Args, Return, F: (...Array<Args>) => Return> = {
ref: {
eventFn: F,
impl: F,
},
nextImpl: F,
};
export type FunctionComponentUpdateQueue = {
lastEffect: Effect | null,
events: Array<EventFunctionPayload<any, any, any>> | null,
stores: Array<StoreConsistencyCheck<any>> | null,
// NOTE: optional, only set when enableUseMemoCacheHook is enabled
memoCache?: MemoCache | null,
};
type BasicStateAction<S> = (S => S) | S;
type Dispatch<A> = A => void;
// These are set right before calling the component.
let renderLanes: Lanes = NoLanes;
// The work-in-progress fiber. I've named it differently to distinguish it from
// the work-in-progress hook.
let currentlyRenderingFiber: Fiber = (null: any);
// Hooks are stored as a linked list on the fiber's memoizedState field. The
// current hook list is the list that belongs to the current fiber. The
// work-in-progress hook list is a new list that will be added to the
// work-in-progress fiber.
let currentHook: Hook | null = null;
let workInProgressHook: Hook | null = null;
// Whether an update was scheduled at any point during the render phase. This
// does not get reset if we do another render pass; only when we're completely
// finished evaluating this component. This is an optimization so we know
// whether we need to clear render phase updates after a throw.
let didScheduleRenderPhaseUpdate: boolean = false;
// Where an update was scheduled only during the current render pass. This
// gets reset after each attempt.
// TODO: Maybe there's some way to consolidate this with
// `didScheduleRenderPhaseUpdate`. Or with `numberOfReRenders`.
let didScheduleRenderPhaseUpdateDuringThisPass: boolean = false;
let shouldDoubleInvokeUserFnsInHooksDEV: boolean = false;
// Counts the number of useId hooks in this component.
let localIdCounter: number = 0;
// Counts number of `use`-d thenables
let thenableIndexCounter: number = 0;
let thenableState: ThenableState | null = null;
// Used for ids that are generated completely client-side (i.e. not during
// hydration). This counter is global, so client ids are not stable across
// render attempts.
let globalClientIdCounter: number = 0;
const RE_RENDER_LIMIT = 25;
// In DEV, this is the name of the currently executing primitive hook
let currentHookNameInDev: ?HookType = null;
// In DEV, this list ensures that hooks are called in the same order between renders.
// The list stores the order of hooks used during the initial render (mount).
// Subsequent renders (updates) reference this list.
let hookTypesDev: Array<HookType> | null = null;
let hookTypesUpdateIndexDev: number = -1;
// In DEV, this tracks whether currently rendering component needs to ignore
// the dependencies for Hooks that need them (e.g. useEffect or useMemo).
// When true, such Hooks will always be "remounted". Only used during hot reload.
let ignorePreviousDependencies: boolean = false;
function mountHookTypesDev(): void {
if (__DEV__) {
const hookName = ((currentHookNameInDev: any): HookType);
if (hookTypesDev === null) {
hookTypesDev = [hookName];
} else {
hookTypesDev.push(hookName);
}
}
}
function updateHookTypesDev(): void {
if (__DEV__) {
const hookName = ((currentHookNameInDev: any): HookType);
if (hookTypesDev !== null) {
hookTypesUpdateIndexDev++;
if (hookTypesDev[hookTypesUpdateIndexDev] !== hookName) {
warnOnHookMismatchInDev(hookName);
}
}
}
}
function checkDepsAreArrayDev(deps: mixed): void {
if (__DEV__) {
if (deps !== undefined && deps !== null && !isArray(deps)) {
// Verify deps, but only on mount to avoid extra checks.
// It's unlikely their type would change as usually you define them inline.
console.error(
'%s received a final argument that is not an array (instead, received `%s`). When ' +
'specified, the final argument must be an array.',
currentHookNameInDev,
typeof deps,
);
}
}
}
function warnOnHookMismatchInDev(currentHookName: HookType): void {
if (__DEV__) {
const componentName = getComponentNameFromFiber(currentlyRenderingFiber);
if (!didWarnAboutMismatchedHooksForComponent.has(componentName)) {
didWarnAboutMismatchedHooksForComponent.add(componentName);
if (hookTypesDev !== null) {
let table = '';
const secondColumnStart = 30;
for (let i = 0; i <= ((hookTypesUpdateIndexDev: any): number); i++) {
const oldHookName = hookTypesDev[i];
const newHookName =
i === ((hookTypesUpdateIndexDev: any): number)
? currentHookName
: oldHookName;
let row = `${i + 1}. ${oldHookName}`;
// Extra space so second column lines up
// lol @ IE not supporting String#repeat
while (row.length < secondColumnStart) {
row += ' ';
}
row += newHookName + '\n';
table += row;
}
console.error(
'React has detected a change in the order of Hooks called by %s. ' +
'This will lead to bugs and errors if not fixed. ' +
'For more information, read the Rules of Hooks: https://react.dev/link/rules-of-hooks\n\n' +
' Previous render Next render\n' +
' ------------------------------------------------------\n' +
'%s' +
' ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n',
componentName,
table,
);
}
}
}
}
function warnOnUseFormStateInDev(): void {
if (__DEV__) {
const componentName = getComponentNameFromFiber(currentlyRenderingFiber);
if (!didWarnAboutUseFormState.has(componentName)) {
didWarnAboutUseFormState.add(componentName);
console.error(
'ReactDOM.useFormState has been renamed to React.useActionState. ' +
'Please update %s to use React.useActionState.',
componentName,
);
}
}
}
function warnIfAsyncClientComponent(Component: Function) {
if (__DEV__) {
// This dev-only check only works for detecting native async functions,
// not transpiled ones. There's also a prod check that we use to prevent
// async client components from crashing the app; the prod one works even
// for transpiled async functions. Neither mechanism is completely
// bulletproof but together they cover the most common cases.
const isAsyncFunction =
// $FlowIgnore[method-unbinding]
Object.prototype.toString.call(Component) === '[object AsyncFunction]' ||
// $FlowIgnore[method-unbinding]
Object.prototype.toString.call(Component) ===
'[object AsyncGeneratorFunction]';
if (isAsyncFunction) {
// Encountered an async Client Component. This is not yet supported.
const componentName = getComponentNameFromFiber(currentlyRenderingFiber);
if (!didWarnAboutAsyncClientComponent.has(componentName)) {
didWarnAboutAsyncClientComponent.add(componentName);
console.error(
'async/await is not yet supported in Client Components, only ' +
'Server Components. This error is often caused by accidentally ' +
"adding `'use client'` to a module that was originally written " +
'for the server.',
);
}
}
}
}
function throwInvalidHookError() {
throw new Error(
'Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for' +
' one of the following reasons:\n' +
'1. You might have mismatching versions of React and the renderer (such as React DOM)\n' +
'2. You might be breaking the Rules of Hooks\n' +
'3. You might have more than one copy of React in the same app\n' +
'See https://react.dev/link/invalid-hook-call for tips about how to debug and fix this problem.',
);
}
function areHookInputsEqual(
nextDeps: Array<mixed>,
prevDeps: Array<mixed> | null,
): boolean {
if (__DEV__) {
if (ignorePreviousDependencies) {
// Only true when this component is being hot reloaded.
return false;
}
}
if (prevDeps === null) {
if (__DEV__) {
console.error(
'%s received a final argument during this render, but not during ' +
'the previous render. Even though the final argument is optional, ' +
'its type cannot change between renders.',
currentHookNameInDev,
);
}
return false;
}
if (__DEV__) {
// Don't bother comparing lengths in prod because these arrays should be
// passed inline.
if (nextDeps.length !== prevDeps.length) {
console.error(
'The final argument passed to %s changed size between renders. The ' +
'order and size of this array must remain constant.\n\n' +
'Previous: %s\n' +
'Incoming: %s',
currentHookNameInDev,
`[${prevDeps.join(', ')}]`,
`[${nextDeps.join(', ')}]`,
);
}
}
// $FlowFixMe[incompatible-use] found when upgrading Flow
for (let i = 0; i < prevDeps.length && i < nextDeps.length; i++) {
// $FlowFixMe[incompatible-use] found when upgrading Flow
if (is(nextDeps[i], prevDeps[i])) {
continue;
}
return false;
}
return true;
}
export function renderWithHooks<Props, SecondArg>(
current: Fiber | null,
workInProgress: Fiber,
Component: (p: Props, arg: SecondArg) => any,
props: Props,
secondArg: SecondArg,
nextRenderLanes: Lanes,
): any {
renderLanes = nextRenderLanes;
currentlyRenderingFiber = workInProgress;
if (__DEV__) {
hookTypesDev =
current !== null
? ((current._debugHookTypes: any): Array<HookType>)
: null;
hookTypesUpdateIndexDev = -1;
// Used for hot reloading:
ignorePreviousDependencies =
current !== null && current.type !== workInProgress.type;
warnIfAsyncClientComponent(Component);
}
workInProgress.memoizedState = null;
workInProgress.updateQueue = null;
workInProgress.lanes = NoLanes;
// The following should have already been reset
// currentHook = null;
// workInProgressHook = null;
// didScheduleRenderPhaseUpdate = false;
// localIdCounter = 0;
// thenableIndexCounter = 0;
// thenableState = null;
// TODO Warn if no hooks are used at all during mount, then some are used during update.
// Currently we will identify the update render as a mount because memoizedState === null.
// This is tricky because it's valid for certain types of components (e.g. React.lazy)
// Using memoizedState to differentiate between mount/update only works if at least one stateful hook is used.
// Non-stateful hooks (e.g. context) don't get added to memoizedState,
// so memoizedState would be null during updates and mounts.
if (__DEV__) {
if (current !== null && current.memoizedState !== null) {
ReactSharedInternals.H = HooksDispatcherOnUpdateInDEV;
} else if (hookTypesDev !== null) {
// This dispatcher handles an edge case where a component is updating,
// but no stateful hooks have been used.
// We want to match the production code behavior (which will use HooksDispatcherOnMount),
// but with the extra DEV validation to ensure hooks ordering hasn't changed.
// This dispatcher does that.
ReactSharedInternals.H = HooksDispatcherOnMountWithHookTypesInDEV;
} else {
ReactSharedInternals.H = HooksDispatcherOnMountInDEV;
}
} else {
ReactSharedInternals.H =
current === null || current.memoizedState === null
? HooksDispatcherOnMount
: HooksDispatcherOnUpdate;
}
// In Strict Mode, during development, user functions are double invoked to
// help detect side effects. The logic for how this is implemented for in
// hook components is a bit complex so let's break it down.
//
// We will invoke the entire component function twice. However, during the
// second invocation of the component, the hook state from the first
// invocation will be reused. That means things like `useMemo` functions won't
// run again, because the deps will match and the memoized result will
// be reused.
//
// We want memoized functions to run twice, too, so account for this, user
// functions are double invoked during the *first* invocation of the component
// function, and are *not* double invoked during the second incovation:
//
// - First execution of component function: user functions are double invoked
// - Second execution of component function (in Strict Mode, during
// development): user functions are not double invoked.
//
// This is intentional for a few reasons; most importantly, it's because of
// how `use` works when something suspends: it reuses the promise that was
// passed during the first attempt. This is itself a form of memoization.
// We need to be able to memoize the reactive inputs to the `use` call using
// a hook (i.e. `useMemo`), which means, the reactive inputs to `use` must
// come from the same component invocation as the output.
//
// There are plenty of tests to ensure this behavior is correct.
const shouldDoubleRenderDEV =
__DEV__ &&
debugRenderPhaseSideEffectsForStrictMode &&
(workInProgress.mode & StrictLegacyMode) !== NoMode;
shouldDoubleInvokeUserFnsInHooksDEV = shouldDoubleRenderDEV;
let children = __DEV__
? callComponentInDEV(Component, props, secondArg)
: Component(props, secondArg);
shouldDoubleInvokeUserFnsInHooksDEV = false;
// Check if there was a render phase update
if (didScheduleRenderPhaseUpdateDuringThisPass) {
// Keep rendering until the component stabilizes (there are no more render
// phase updates).
children = renderWithHooksAgain(
workInProgress,
Component,
props,
secondArg,
);
}
if (shouldDoubleRenderDEV) {
// In development, components are invoked twice to help detect side effects.
setIsStrictModeForDevtools(true);
try {
children = renderWithHooksAgain(
workInProgress,
Component,
props,
secondArg,
);
} finally {
setIsStrictModeForDevtools(false);
}
}
finishRenderingHooks(current, workInProgress, Component);
return children;
}
function finishRenderingHooks<Props, SecondArg>(
current: Fiber | null,
workInProgress: Fiber,
Component: (p: Props, arg: SecondArg) => any,
): void {
if (__DEV__) {
workInProgress._debugHookTypes = hookTypesDev;
}
// We can assume the previous dispatcher is always this one, since we set it
// at the beginning of the render phase and there's no re-entrance.
ReactSharedInternals.H = ContextOnlyDispatcher;
// This check uses currentHook so that it works the same in DEV and prod bundles.
// hookTypesDev could catch more cases (e.g. context) but only in DEV bundles.
const didRenderTooFewHooks =
currentHook !== null && currentHook.next !== null;
renderLanes = NoLanes;
currentlyRenderingFiber = (null: any);
currentHook = null;
workInProgressHook = null;
if (__DEV__) {
currentHookNameInDev = null;
hookTypesDev = null;
hookTypesUpdateIndexDev = -1;
// Confirm that a static flag was not added or removed since the last
// render. If this fires, it suggests that we incorrectly reset the static
// flags in some other part of the codebase. This has happened before, for
// example, in the SuspenseList implementation.
if (
current !== null &&
(current.flags & StaticMaskEffect) !==
(workInProgress.flags & StaticMaskEffect) &&
// Disable this warning in legacy mode, because legacy Suspense is weird
// and creates false positives. To make this work in legacy mode, we'd
// need to mark fibers that commit in an incomplete state, somehow. For
// now I'll disable the warning that most of the bugs that would trigger
// it are either exclusive to concurrent mode or exist in both.
(disableLegacyMode || (current.mode & ConcurrentMode) !== NoMode)
) {
console.error(
'Internal React error: Expected static flag was missing. Please ' +
'notify the React team.',
);
}
}
didScheduleRenderPhaseUpdate = false;
// This is reset by checkDidRenderIdHook
// localIdCounter = 0;
thenableIndexCounter = 0;
thenableState = null;
if (didRenderTooFewHooks) {
throw new Error(
'Rendered fewer hooks than expected. This may be caused by an accidental ' +
'early return statement.',
);
}
if (enableLazyContextPropagation) {
if (current !== null) {
if (!checkIfWorkInProgressReceivedUpdate()) {
// If there were no changes to props or state, we need to check if there
// was a context change. We didn't already do this because there's no
// 1:1 correspondence between dependencies and hooks. Although, because
// there almost always is in the common case (`readContext` is an
// internal API), we could compare in there. OTOH, we only hit this case
// if everything else bails out, so on the whole it might be better to
// keep the comparison out of the common path.
const currentDependencies = current.dependencies;
if (
currentDependencies !== null &&
checkIfContextChanged(currentDependencies)
) {
markWorkInProgressReceivedUpdate();
}
}
}
}
if (__DEV__) {
if (checkIfUseWrappedInTryCatch()) {
const componentName =
getComponentNameFromFiber(workInProgress) || 'Unknown';
if (
!didWarnAboutUseWrappedInTryCatch.has(componentName) &&
// This warning also fires if you suspend with `use` inside an
// async component. Since we warn for that above, we'll silence this
// second warning by checking here.
!didWarnAboutAsyncClientComponent.has(componentName)
) {
didWarnAboutUseWrappedInTryCatch.add(componentName);
console.error(
'`use` was called from inside a try/catch block. This is not allowed ' +
'and can lead to unexpected behavior. To handle errors triggered ' +
'by `use`, wrap your component in a error boundary.',
);
}
}
}
}
export function replaySuspendedComponentWithHooks<Props, SecondArg>(
current: Fiber | null,
workInProgress: Fiber,
Component: (p: Props, arg: SecondArg) => any,
props: Props,
secondArg: SecondArg,
): any {
// This function is used to replay a component that previously suspended,
// after its data resolves.
//
// It's a simplified version of renderWithHooks, but it doesn't need to do
// most of the set up work because they weren't reset when we suspended; they
// only get reset when the component either completes (finishRenderingHooks)
// or unwinds (resetHooksOnUnwind).
if (__DEV__) {
hookTypesUpdateIndexDev = -1;
// Used for hot reloading:
ignorePreviousDependencies =
current !== null && current.type !== workInProgress.type;
}
const children = renderWithHooksAgain(
workInProgress,
Component,
props,
secondArg,
);
finishRenderingHooks(current, workInProgress, Component);
return children;
}
function renderWithHooksAgain<Props, SecondArg>(
workInProgress: Fiber,
Component: (p: Props, arg: SecondArg) => any,
props: Props,
secondArg: SecondArg,
): any {
// This is used to perform another render pass. It's used when setState is
// called during render, and for double invoking components in Strict Mode
// during development.
//
// The state from the previous pass is reused whenever possible. So, state
// updates that were already processed are not processed again, and memoized
// functions (`useMemo`) are not invoked again.
//
// Keep rendering in a loop for as long as render phase updates continue to
// be scheduled. Use a counter to prevent infinite loops.
currentlyRenderingFiber = workInProgress;
let numberOfReRenders: number = 0;
let children;
do {
if (didScheduleRenderPhaseUpdateDuringThisPass) {
// It's possible that a use() value depended on a state that was updated in
// this rerender, so we need to watch for different thenables this time.
thenableState = null;
}
thenableIndexCounter = 0;
didScheduleRenderPhaseUpdateDuringThisPass = false;
if (numberOfReRenders >= RE_RENDER_LIMIT) {
throw new Error(
'Too many re-renders. React limits the number of renders to prevent ' +
'an infinite loop.',
);
}
numberOfReRenders += 1;
if (__DEV__) {
// Even when hot reloading, allow dependencies to stabilize
// after first render to prevent infinite render phase updates.
ignorePreviousDependencies = false;
}
// Start over from the beginning of the list
currentHook = null;
workInProgressHook = null;
workInProgress.updateQueue = null;
if (__DEV__) {
// Also validate hook order for cascading updates.
hookTypesUpdateIndexDev = -1;
}
ReactSharedInternals.H = __DEV__
? HooksDispatcherOnRerenderInDEV
: HooksDispatcherOnRerender;
children = __DEV__
? callComponentInDEV(Component, props, secondArg)
: Component(props, secondArg);
} while (didScheduleRenderPhaseUpdateDuringThisPass);
return children;
}
export function renderTransitionAwareHostComponentWithHooks(
current: Fiber | null,
workInProgress: Fiber,
lanes: Lanes,
): TransitionStatus {
if (!enableAsyncActions) {
throw new Error('Not implemented.');
}
return renderWithHooks(
current,
workInProgress,
TransitionAwareHostComponent,
null,
null,
lanes,
);
}
export function TransitionAwareHostComponent(): TransitionStatus {
if (!enableAsyncActions) {
throw new Error('Not implemented.');
}
const dispatcher: any = ReactSharedInternals.H;
const [maybeThenable] = dispatcher.useState();
let nextState;
if (typeof maybeThenable.then === 'function') {
const thenable: Thenable<TransitionStatus> = (maybeThenable: any);
nextState = useThenable(thenable);
} else {
const status: TransitionStatus = maybeThenable;
nextState = status;
}
// The "reset state" is an object. If it changes, that means something
// requested that we reset the form.
const [nextResetState] = dispatcher.useState();
const prevResetState =
currentHook !== null ? currentHook.memoizedState : null;
if (prevResetState !== nextResetState) {
// Schedule a form reset
currentlyRenderingFiber.flags |= FormReset;
}
return nextState;
}
export function checkDidRenderIdHook(): boolean {
// This should be called immediately after every renderWithHooks call.
// Conceptually, it's part of the return value of renderWithHooks; it's only a
// separate function to avoid using an array tuple.
const didRenderIdHook = localIdCounter !== 0;
localIdCounter = 0;
return didRenderIdHook;
}
export function bailoutHooks(
current: Fiber,
workInProgress: Fiber,
lanes: Lanes,
): void {
workInProgress.updateQueue = current.updateQueue;
// TODO: Don't need to reset the flags here, because they're reset in the
// complete phase (bubbleProperties).
if (__DEV__ && (workInProgress.mode & StrictEffectsMode) !== NoMode) {
workInProgress.flags &= ~(
MountPassiveDevEffect |
MountLayoutDevEffect |
PassiveEffect |
UpdateEffect
);
} else {
workInProgress.flags &= ~(PassiveEffect | UpdateEffect);
}
current.lanes = removeLanes(current.lanes, lanes);
}
export function resetHooksAfterThrow(): void {
// This is called immediaetly after a throw. It shouldn't reset the entire
// module state, because the work loop might decide to replay the component
// again without rewinding.
//
// It should only reset things like the current dispatcher, to prevent hooks
// from being called outside of a component.
currentlyRenderingFiber = (null: any);
// We can assume the previous dispatcher is always this one, since we set it
// at the beginning of the render phase and there's no re-entrance.
ReactSharedInternals.H = ContextOnlyDispatcher;
}
export function resetHooksOnUnwind(workInProgress: Fiber): void {
if (didScheduleRenderPhaseUpdate) {
// There were render phase updates. These are only valid for this render
// phase, which we are now aborting. Remove the updates from the queues so
// they do not persist to the next render. Do not remove updates from hooks
// that weren't processed.
//
// Only reset the updates from the queue if it has a clone. If it does
// not have a clone, that means it wasn't processed, and the updates were
// scheduled before we entered the render phase.
let hook: Hook | null = workInProgress.memoizedState;
while (hook !== null) {
const queue = hook.queue;
if (queue !== null) {
queue.pending = null;
}
hook = hook.next;
}
didScheduleRenderPhaseUpdate = false;
}
renderLanes = NoLanes;
currentlyRenderingFiber = (null: any);
currentHook = null;
workInProgressHook = null;
if (__DEV__) {
hookTypesDev = null;
hookTypesUpdateIndexDev = -1;
currentHookNameInDev = null;
}
didScheduleRenderPhaseUpdateDuringThisPass = false;
localIdCounter = 0;
thenableIndexCounter = 0;
thenableState = null;
}
function mountWorkInProgressHook(): Hook {
const hook: Hook = {
memoizedState: null,
baseState: null,
baseQueue: null,
queue: null,
next: null,
};
if (workInProgressHook === null) {
// This is the first hook in the list
currentlyRenderingFiber.memoizedState = workInProgressHook = hook;
} else {
// Append to the end of the list
workInProgressHook = workInProgressHook.next = hook;
}
return workInProgressHook;
}
function updateWorkInProgressHook(): Hook {
// This function is used both for updates and for re-renders triggered by a
// render phase update. It assumes there is either a current hook we can
// clone, or a work-in-progress hook from a previous render pass that we can
// use as a base.
let nextCurrentHook: null | Hook;
if (currentHook === null) {
const current = currentlyRenderingFiber.alternate;
if (current !== null) {
nextCurrentHook = current.memoizedState;
} else {
nextCurrentHook = null;