10 examples of 'react usestate callback' in JavaScript

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11function useStateCallback(setState, fn) {
12 return useCallback((...args) => (
13 setState((s) => fn(s, ...args))
14 ), [setState, fn])
15}
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25export default function useCallbackRef<TValue = unknown>(): [
26 TValue | null,
27 (ref: TValue | null) => void,
28] {
29 return useState<TValue | null>(null)
30}
70export function useState(initialState) {
71 return useReducer(invokeOrReturn, initialState);
72}
38export function useRef(current) {
39 let [state] = useState({ current });
40 return state;
41}
3export function useStateRef<S>(initialState: S | (() => S)) {
4 const [value, update] = useState(initialState)
5 const ref = useRef({ value, update })
6
7 ref.current.value = value
8 ref.current.update = update
9 return ref.current
10}
68export function useIsMounted() {
69 const isMountedRef = useRef(false);
70
71 const isMounted = useCallback(() => {
72 return isMountedRef.current;
73 }, []);
74
75 useEffect(() => {
76 isMountedRef.current = true;
77 return () => {
78 isMountedRef.current = false;
79 };
80 }, []);
81
82 return isMounted;
83}
74function useWillMount(callback) {
75 const rendered = React.useRef(false)
76 if (!rendered.current) {
77 callback()
78 }
79 rendered.current = true
80}
40function useState(...args) {
41 return isFunctional() ? _useState(...args) : useClassState(...args);
42}
110export function useCallback(
111 callback: () => mixed,
112 inputs: Array<mixed> | void | null,
113) {
114 const dispatcher = resolveDispatcher();
115 return dispatcher.useCallback(callback, inputs);
116}
75export function useState<S>(initialState: (() => S) | S) {
76 const dispatcher = resolveDispatcher();
77 return dispatcher.useState(initialState);
78}

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