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import { useState } from 'react';
import { IHookStateInitAction, IHookStateSetAction, resolveHookState } from '../misc/hookState';
import useEffectOnce from '../useEffectOnce';
import useIsomorphicLayoutEffect from '../useIsomorphicLayoutEffect';
export function createGlobalState<S = any>(
initialState: IHookStateInitAction<S>
): () => [S, (state: IHookStateSetAction<S>) => void];
export function createGlobalState<S = undefined>(): () => [
S,
(state: IHookStateSetAction<S>) => void
];
export function createGlobalState<S>(initialState?: S) {
const store: {
state: S;
setState: (state: IHookStateSetAction<S>) => void;
setters: any[];
} = {
state: initialState instanceof Function ? initialState() : initialState,
setState(nextState: IHookStateSetAction<S>) {
store.state = resolveHookState(nextState, store.state);
store.setters.forEach((setter) => setter(store.state));
},
setters: [],
};
return () => {
const [globalState, stateSetter] = useState<S | undefined>(store.state);
useEffectOnce(() => () => {
store.setters = store.setters.filter((setter) => setter !== stateSetter);
});
useIsomorphicLayoutEffect(() => {
if (!store.setters.includes(stateSetter)) {
store.setters.push(stateSetter);
}
});
return [globalState, store.setState];
};
}
export default createGlobalState;
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