16 lines
392 B
TypeScript
16 lines
392 B
TypeScript
import { useRef } from '../lib/teact/teact';
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// This is not render-dependent and will never allow previous to match current
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export default function usePrevious<T extends any>(current: T) {
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const prevRef = useRef<T>();
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const lastRef = useRef<T>();
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if (lastRef.current !== current) {
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prevRef.current = lastRef.current;
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}
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lastRef.current = current;
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return prevRef.current;
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}
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