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straightford explicit types (#25253)
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+175
-139
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‎packages/react-debug-tools/src/ReactDebugHooks.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -783,7 +783,7 @@ export function inspectHooksOfFiber(
783783
fiber: Fiber,
784784
currentDispatcher: ?CurrentDispatcherRef,
785785
includeHooksSource?: boolean = false,
786-
) {
786+
): HooksTree {
787787
// DevTools will pass the current renderer's injected dispatcher.
788788
// Other apps might compile debug hooks as part of their app though.
789789
if (currentDispatcher == null) {

‎packages/react-dom/src/client/ReactDOMHostConfig.js

+5-3
Original file line numberDiff line numberDiff line change
@@ -680,7 +680,7 @@ export function clearContainer(container: Container): void {
680680

681681
export const supportsHydration = true;
682682

683-
export function isHydratableResource(type: string, props: Props) {
683+
export function isHydratableResource(type: string, props: Props): boolean {
684684
return (
685685
type === 'link' &&
686686
typeof (props: any).precedence === 'string' &&
@@ -726,11 +726,13 @@ export function canHydrateSuspenseInstance(
726726
return ((instance: any): SuspenseInstance);
727727
}
728728

729-
export function isSuspenseInstancePending(instance: SuspenseInstance) {
729+
export function isSuspenseInstancePending(instance: SuspenseInstance): boolean {
730730
return instance.data === SUSPENSE_PENDING_START_DATA;
731731
}
732732

733-
export function isSuspenseInstanceFallback(instance: SuspenseInstance) {
733+
export function isSuspenseInstanceFallback(
734+
instance: SuspenseInstance,
735+
): boolean {
734736
return instance.data === SUSPENSE_FALLBACK_START_DATA;
735737
}
736738

‎packages/react-dom/src/client/inputValueTracking.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -123,7 +123,7 @@ export function track(node: ElementWithValueTracker) {
123123
node._valueTracker = trackValueOnNode(node);
124124
}
125125

126-
export function updateValueIfChanged(node: ElementWithValueTracker) {
126+
export function updateValueIfChanged(node: ElementWithValueTracker): boolean {
127127
if (!node) {
128128
return false;
129129
}

‎packages/react-dom/src/events/checkPassiveEvents.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@
99

1010
import {canUseDOM} from 'shared/ExecutionEnvironment';
1111

12-
export let passiveBrowserEventsSupported = false;
12+
export let passiveBrowserEventsSupported: boolean = false;
1313

1414
// Check if browser support events with passive listeners
1515
// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support

‎packages/react-dom/src/shared/DOMProperty.js

+2-2
Original file line numberDiff line numberDiff line change
@@ -63,10 +63,10 @@ export type PropertyInfo = {
6363
export const ATTRIBUTE_NAME_START_CHAR =
6464
':A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD';
6565
/* eslint-enable max-len */
66-
export const ATTRIBUTE_NAME_CHAR =
66+
export const ATTRIBUTE_NAME_CHAR: string =
6767
ATTRIBUTE_NAME_START_CHAR + '\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040';
6868

69-
export const VALID_ATTRIBUTE_NAME_REGEX = new RegExp(
69+
export const VALID_ATTRIBUTE_NAME_REGEX: RegExp = new RegExp(
7070
'^[' + ATTRIBUTE_NAME_START_CHAR + '][' + ATTRIBUTE_NAME_CHAR + ']*$',
7171
);
7272

‎packages/react-dom/src/shared/isCustomComponent.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* @flow
88
*/
99

10-
function isCustomComponent(tagName: string, props: Object) {
10+
function isCustomComponent(tagName: string, props: Object): boolean {
1111
if (tagName.indexOf('-') === -1) {
1212
return typeof props.is === 'string';
1313
}

‎packages/react-is/src/ReactIs.js

+14-14
Original file line numberDiff line numberDiff line change
@@ -82,7 +82,7 @@ let hasWarnedAboutDeprecatedIsAsyncMode = false;
8282
let hasWarnedAboutDeprecatedIsConcurrentMode = false;
8383

8484
// AsyncMode should be deprecated
85-
export function isAsyncMode(object: any) {
85+
export function isAsyncMode(object: any): boolean {
8686
if (__DEV__) {
8787
if (!hasWarnedAboutDeprecatedIsAsyncMode) {
8888
hasWarnedAboutDeprecatedIsAsyncMode = true;
@@ -95,7 +95,7 @@ export function isAsyncMode(object: any) {
9595
}
9696
return false;
9797
}
98-
export function isConcurrentMode(object: any) {
98+
export function isConcurrentMode(object: any): boolean {
9999
if (__DEV__) {
100100
if (!hasWarnedAboutDeprecatedIsConcurrentMode) {
101101
hasWarnedAboutDeprecatedIsConcurrentMode = true;
@@ -108,43 +108,43 @@ export function isConcurrentMode(object: any) {
108108
}
109109
return false;
110110
}
111-
export function isContextConsumer(object: any) {
111+
export function isContextConsumer(object: any): boolean {
112112
return typeOf(object) === REACT_CONTEXT_TYPE;
113113
}
114-
export function isContextProvider(object: any) {
114+
export function isContextProvider(object: any): boolean {
115115
return typeOf(object) === REACT_PROVIDER_TYPE;
116116
}
117-
export function isElement(object: any) {
117+
export function isElement(object: any): boolean {
118118
return (
119119
typeof object === 'object' &&
120120
object !== null &&
121121
object.$$typeof === REACT_ELEMENT_TYPE
122122
);
123123
}
124-
export function isForwardRef(object: any) {
124+
export function isForwardRef(object: any): boolean {
125125
return typeOf(object) === REACT_FORWARD_REF_TYPE;
126126
}
127-
export function isFragment(object: any) {
127+
export function isFragment(object: any): boolean {
128128
return typeOf(object) === REACT_FRAGMENT_TYPE;
129129
}
130-
export function isLazy(object: any) {
130+
export function isLazy(object: any): boolean {
131131
return typeOf(object) === REACT_LAZY_TYPE;
132132
}
133-
export function isMemo(object: any) {
133+
export function isMemo(object: any): boolean {
134134
return typeOf(object) === REACT_MEMO_TYPE;
135135
}
136-
export function isPortal(object: any) {
136+
export function isPortal(object: any): boolean {
137137
return typeOf(object) === REACT_PORTAL_TYPE;
138138
}
139-
export function isProfiler(object: any) {
139+
export function isProfiler(object: any): boolean {
140140
return typeOf(object) === REACT_PROFILER_TYPE;
141141
}
142-
export function isStrictMode(object: any) {
142+
export function isStrictMode(object: any): boolean {
143143
return typeOf(object) === REACT_STRICT_MODE_TYPE;
144144
}
145-
export function isSuspense(object: any) {
145+
export function isSuspense(object: any): boolean {
146146
return typeOf(object) === REACT_SUSPENSE_TYPE;
147147
}
148-
export function isSuspenseList(object: any) {
148+
export function isSuspenseList(object: any): boolean {
149149
return typeOf(object) === REACT_SUSPENSE_LIST_TYPE;
150150
}

‎packages/react-reconciler/src/ReactCurrentFiber.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -73,7 +73,7 @@ export function setIsRendering(rendering: boolean) {
7373
}
7474
}
7575

76-
export function getIsRendering() {
76+
export function getIsRendering(): void | boolean {
7777
if (__DEV__) {
7878
return isRendering;
7979
}

‎packages/react-reconciler/src/ReactEventPriorities.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -58,7 +58,7 @@ export function getCurrentUpdatePriority(): EventPriority {
5858
: (getCurrentUpdatePriority_old(): any);
5959
}
6060

61-
export function setCurrentUpdatePriority(priority: EventPriority) {
61+
export function setCurrentUpdatePriority(priority: EventPriority): void {
6262
return enableNewReconciler
6363
? setCurrentUpdatePriority_new((priority: any))
6464
: setCurrentUpdatePriority_old((priority: any));

‎packages/react-reconciler/src/ReactFiber.new.js

+5-2
Original file line numberDiff line numberDiff line change
@@ -225,7 +225,7 @@ function shouldConstruct(Component: Function) {
225225
return !!(prototype && prototype.isReactComponent);
226226
}
227227

228-
export function isSimpleFunctionComponent(type: any) {
228+
export function isSimpleFunctionComponent(type: any): boolean {
229229
return (
230230
typeof type === 'function' &&
231231
!shouldConstruct(type) &&
@@ -355,7 +355,10 @@ export function createWorkInProgress(current: Fiber, pendingProps: any): Fiber {
355355
}
356356

357357
// Used to reuse a Fiber for a second pass.
358-
export function resetWorkInProgress(workInProgress: Fiber, renderLanes: Lanes) {
358+
export function resetWorkInProgress(
359+
workInProgress: Fiber,
360+
renderLanes: Lanes,
361+
): Fiber {
359362
// This resets the Fiber to what createFiber or createWorkInProgress would
360363
// have set the values to before during the first pass. Ideally this wouldn't
361364
// be necessary but unfortunately many code paths reads from the workInProgress

‎packages/react-reconciler/src/ReactFiber.old.js

+5-2
Original file line numberDiff line numberDiff line change
@@ -225,7 +225,7 @@ function shouldConstruct(Component: Function) {
225225
return !!(prototype && prototype.isReactComponent);
226226
}
227227

228-
export function isSimpleFunctionComponent(type: any) {
228+
export function isSimpleFunctionComponent(type: any): boolean {
229229
return (
230230
typeof type === 'function' &&
231231
!shouldConstruct(type) &&
@@ -355,7 +355,10 @@ export function createWorkInProgress(current: Fiber, pendingProps: any): Fiber {
355355
}
356356

357357
// Used to reuse a Fiber for a second pass.
358-
export function resetWorkInProgress(workInProgress: Fiber, renderLanes: Lanes) {
358+
export function resetWorkInProgress(
359+
workInProgress: Fiber,
360+
renderLanes: Lanes,
361+
): Fiber {
359362
// This resets the Fiber to what createFiber or createWorkInProgress would
360363
// have set the values to before during the first pass. Ideally this wouldn't
361364
// be necessary but unfortunately many code paths reads from the workInProgress

‎packages/react-reconciler/src/ReactFiberAct.new.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,7 @@ import {warnsIfNotActing} from './ReactFiberHostConfig';
1515

1616
const {ReactCurrentActQueue} = ReactSharedInternals;
1717

18-
export function isLegacyActEnvironment(fiber: Fiber) {
18+
export function isLegacyActEnvironment(fiber: Fiber): boolean {
1919
if (__DEV__) {
2020
// Legacy mode. We preserve the behavior of React 17's act. It assumes an
2121
// act environment whenever `jest` is defined, but you can still turn off

‎packages/react-reconciler/src/ReactFiberAct.old.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,7 @@ import {warnsIfNotActing} from './ReactFiberHostConfig';
1515

1616
const {ReactCurrentActQueue} = ReactSharedInternals;
1717

18-
export function isLegacyActEnvironment(fiber: Fiber) {
18+
export function isLegacyActEnvironment(fiber: Fiber): boolean {
1919
if (__DEV__) {
2020
// Legacy mode. We preserve the behavior of React 17's act. It assumes an
2121
// act environment whenever `jest` is defined, but you can still turn off

‎packages/react-reconciler/src/ReactFiberBeginWork.new.js

+2-2
Original file line numberDiff line numberDiff line change
@@ -281,7 +281,7 @@ let didWarnAboutModulePatternComponent;
281281
let didWarnAboutContextTypeOnFunctionComponent;
282282
let didWarnAboutGetDerivedStateOnFunctionComponent;
283283
let didWarnAboutFunctionRefs;
284-
export let didWarnAboutReassigningProps;
284+
export let didWarnAboutReassigningProps: boolean;
285285
let didWarnAboutRevealOrder;
286286
let didWarnAboutTailOptions;
287287
let didWarnAboutDefaultPropsOnFunctionComponent;
@@ -3479,7 +3479,7 @@ export function markWorkInProgressReceivedUpdate() {
34793479
didReceiveUpdate = true;
34803480
}
34813481

3482-
export function checkIfWorkInProgressReceivedUpdate() {
3482+
export function checkIfWorkInProgressReceivedUpdate(): boolean {
34833483
return didReceiveUpdate;
34843484
}
34853485

‎packages/react-reconciler/src/ReactFiberBeginWork.old.js

+2-2
Original file line numberDiff line numberDiff line change
@@ -281,7 +281,7 @@ let didWarnAboutModulePatternComponent;
281281
let didWarnAboutContextTypeOnFunctionComponent;
282282
let didWarnAboutGetDerivedStateOnFunctionComponent;
283283
let didWarnAboutFunctionRefs;
284-
export let didWarnAboutReassigningProps;
284+
export let didWarnAboutReassigningProps: boolean;
285285
let didWarnAboutRevealOrder;
286286
let didWarnAboutTailOptions;
287287
let didWarnAboutDefaultPropsOnFunctionComponent;
@@ -3479,7 +3479,7 @@ export function markWorkInProgressReceivedUpdate() {
34793479
didReceiveUpdate = true;
34803480
}
34813481

3482-
export function checkIfWorkInProgressReceivedUpdate() {
3482+
export function checkIfWorkInProgressReceivedUpdate(): boolean {
34833483
return didReceiveUpdate;
34843484
}
34853485

‎packages/react-reconciler/src/ReactFiberClassUpdateQueue.new.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -164,7 +164,7 @@ let hasForceUpdate = false;
164164

165165
let didWarnUpdateInsideUpdate;
166166
let currentlyProcessingQueue;
167-
export let resetCurrentlyProcessingQueue;
167+
export let resetCurrentlyProcessingQueue: () => void;
168168
if (__DEV__) {
169169
didWarnUpdateInsideUpdate = false;
170170
currentlyProcessingQueue = null;

‎packages/react-reconciler/src/ReactFiberClassUpdateQueue.old.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -164,7 +164,7 @@ let hasForceUpdate = false;
164164

165165
let didWarnUpdateInsideUpdate;
166166
let currentlyProcessingQueue;
167-
export let resetCurrentlyProcessingQueue;
167+
export let resetCurrentlyProcessingQueue: () => void;
168168
if (__DEV__) {
169169
didWarnUpdateInsideUpdate = false;
170170
currentlyProcessingQueue = null;

‎packages/react-reconciler/src/ReactFiberCommitWork.new.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -320,7 +320,7 @@ let shouldFireAfterActiveInstanceBlur: boolean = false;
320320
export function commitBeforeMutationEffects(
321321
root: FiberRoot,
322322
firstChild: Fiber,
323-
) {
323+
): boolean {
324324
focusedInstanceHandle = prepareForCommit(root.containerInfo);
325325

326326
nextEffect = firstChild;

‎packages/react-reconciler/src/ReactFiberCommitWork.old.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -320,7 +320,7 @@ let shouldFireAfterActiveInstanceBlur: boolean = false;
320320
export function commitBeforeMutationEffects(
321321
root: FiberRoot,
322322
firstChild: Fiber,
323-
) {
323+
): boolean {
324324
focusedInstanceHandle = prepareForCommit(root.containerInfo);
325325

326326
nextEffect = firstChild;

‎packages/react-reconciler/src/ReactFiberHiddenContext.new.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -66,6 +66,6 @@ export function popHiddenContext(fiber: Fiber): void {
6666
pop(prevRenderLanesStackCursor, fiber);
6767
}
6868

69-
export function isCurrentTreeHidden() {
69+
export function isCurrentTreeHidden(): boolean {
7070
return currentTreeHiddenStackCursor.current !== null;
7171
}

‎packages/react-reconciler/src/ReactFiberHiddenContext.old.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -66,6 +66,6 @@ export function popHiddenContext(fiber: Fiber): void {
6666
pop(prevRenderLanesStackCursor, fiber);
6767
}
6868

69-
export function isCurrentTreeHidden() {
69+
export function isCurrentTreeHidden(): boolean {
7070
return currentTreeHiddenStackCursor.current !== null;
7171
}

‎packages/react-reconciler/src/ReactFiberHooks.new.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -571,7 +571,7 @@ export function renderWithHooks<Props, SecondArg>(
571571
return children;
572572
}
573573

574-
export function checkDidRenderIdHook() {
574+
export function checkDidRenderIdHook(): boolean {
575575
// This should be called immediately after every renderWithHooks call.
576576
// Conceptually, it's part of the return value of renderWithHooks; it's only a
577577
// separate function to avoid using an array tuple.

‎packages/react-reconciler/src/ReactFiberHooks.old.js

+1-1
Original file line numberDiff line numberDiff line change
@@ -571,7 +571,7 @@ export function renderWithHooks<Props, SecondArg>(
571571
return children;
572572
}
573573

574-
export function checkDidRenderIdHook() {
574+
export function checkDidRenderIdHook(): boolean {
575575
// This should be called immediately after every renderWithHooks call.
576576
// Conceptually, it's part of the return value of renderWithHooks; it's only a
577577
// separate function to avoid using an array tuple.

‎packages/react-reconciler/src/ReactFiberHotReloading.js

+15-8
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,8 @@
77
* @flow
88
*/
99

10+
import type {Fiber} from './ReactInternalTypes';
11+
import type {ReactElement} from '../../shared/ReactElementType';
1012
import type {Instance} from './ReactFiberHostConfig';
1113
import type {FiberRoot} from './ReactInternalTypes';
1214
import type {ReactNodeList} from 'shared/ReactTypes';
@@ -58,9 +60,9 @@ export type FindHostInstancesForRefresh = (
5860
families: Array<Family>,
5961
) => Set<Instance>;
6062

61-
export const setRefreshHandler = enableNewReconciler
62-
? setRefreshHandler_new
63-
: setRefreshHandler_old;
63+
export const setRefreshHandler: (
64+
handler: RefreshHandler | null,
65+
) => void = enableNewReconciler ? setRefreshHandler_new : setRefreshHandler_old;
6466
export const resolveFunctionForHotReloading = enableNewReconciler
6567
? resolveFunctionForHotReloading_new
6668
: resolveFunctionForHotReloading_old;
@@ -70,18 +72,23 @@ export const resolveClassForHotReloading = enableNewReconciler
7072
export const resolveForwardRefForHotReloading = enableNewReconciler
7173
? resolveForwardRefForHotReloading_new
7274
: resolveForwardRefForHotReloading_old;
73-
export const isCompatibleFamilyForHotReloading = enableNewReconciler
75+
export const isCompatibleFamilyForHotReloading: (
76+
fiber: Fiber,
77+
element: ReactElement,
78+
) => boolean = enableNewReconciler
7479
? isCompatibleFamilyForHotReloading_new
7580
: isCompatibleFamilyForHotReloading_old;
76-
export const markFailedErrorBoundaryForHotReloading = enableNewReconciler
81+
export const markFailedErrorBoundaryForHotReloading: (
82+
fiber: Fiber,
83+
) => void = enableNewReconciler
7784
? markFailedErrorBoundaryForHotReloading_new
7885
: markFailedErrorBoundaryForHotReloading_old;
79-
export const scheduleRefresh = enableNewReconciler
86+
export const scheduleRefresh: ScheduleRefresh = enableNewReconciler
8087
? scheduleRefresh_new
8188
: scheduleRefresh_old;
82-
export const scheduleRoot = enableNewReconciler
89+
export const scheduleRoot: ScheduleRoot = enableNewReconciler
8390
? scheduleRoot_new
8491
: scheduleRoot_old;
85-
export const findHostInstancesForRefresh = enableNewReconciler
92+
export const findHostInstancesForRefresh: FindHostInstancesForRefresh = enableNewReconciler
8693
? findHostInstancesForRefresh_new
8794
: findHostInstancesForRefresh_old;

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