18 lines
379 B
TypeScript
18 lines
379 B
TypeScript
import { useEffect, useRef } from "react";
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function useOnChange<T>(
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value: T,
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callback: (newValue: T, prevValue: T | undefined) => void,
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) {
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const prevValue = useRef<T>(value);
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useEffect(() => {
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if (prevValue.current !== undefined) {
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callback(value, prevValue.current);
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}
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prevValue.current = value;
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}, [value, callback]);
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}
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export { useOnChange };
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