12 lines
329 B
TypeScript
12 lines
329 B
TypeScript
import { useRef } from 'react';
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import isEqual from 'lodash-es/isEqual';
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export const useDeepMemo = <T, K> (fn: () => T, key: K): T => {
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const ref = useRef<{ key: K, value: T }>();
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if (!ref.current || !isEqual(key, ref.current.key)) {
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ref.current = { key, value: fn() };
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}
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return ref.current.value;
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};
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