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feat(useGetSet): reworked with use of new resolveHookState function plus improved memory usage;

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xobotyi 2019-10-31 02:58:48 +03:00
parent 9fd02eb821
commit 9b5d0f2ad1
1 changed files with 17 additions and 12 deletions
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29
src/useGetSet.ts
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@ -1,16 +1,21 @@
import { useCallback, useRef } from 'react';
import { Dispatch, useMemo, useRef } from 'react';
import useUpdate from './useUpdate';
import { HookState, InitialHookState, resolveHookState } from './util/resolveHookState';
const useGetSet = <T>(initialValue: T): [() => T, (value: T) => void] => {
const state = useRef(initialValue);
export default function useGetSet<S>(initialState: InitialHookState<S>): [() => S, Dispatch<HookState<S>>] {
const state = useRef(resolveHookState(initialState));
const update = useUpdate();
const get = useCallback(() => state.current, []);
const set = useCallback((value: T) => {
state.current = value;
update();
}, []);
return [get, set];
};
export default useGetSet;
return useMemo(
() => [
// get
() => state.current as S,
// set
(newState: HookState<S>) => {
state.current = resolveHookState(newState, state.current);
update();
},
],
[]
);
}