28 lines
1.1 KiB
JavaScript
28 lines
1.1 KiB
JavaScript
import ReactExports from 'react';
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import useSyncExternalStoreExports from 'use-sync-external-store/shim/with-selector.js';
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import { createStore } from 'zustand/vanilla';
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const { useDebugValue } = ReactExports;
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const { useSyncExternalStoreWithSelector } = useSyncExternalStoreExports;
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const identity = (arg) => arg;
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function useStoreWithEqualityFn(api, selector = identity, equalityFn) {
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const slice = useSyncExternalStoreWithSelector(
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api.subscribe,
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api.getState,
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api.getServerState || api.getInitialState,
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selector,
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equalityFn
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);
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useDebugValue(slice);
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return slice;
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}
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const createWithEqualityFnImpl = (createState, defaultEqualityFn) => {
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const api = createStore(createState);
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const useBoundStoreWithEqualityFn = (selector, equalityFn = defaultEqualityFn) => useStoreWithEqualityFn(api, selector, equalityFn);
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Object.assign(useBoundStoreWithEqualityFn, api);
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return useBoundStoreWithEqualityFn;
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};
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const createWithEqualityFn = (createState, defaultEqualityFn) => createState ? createWithEqualityFnImpl(createState, defaultEqualityFn) : createWithEqualityFnImpl;
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export { createWithEqualityFn, useStoreWithEqualityFn };
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