signal-desktop/ts/hooks/usePrevious.ts

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2023-01-03 19:55:46 +00:00
// Copyright 2020 Signal Messenger, LLC
2021-09-17 22:24:21 +00:00
// SPDX-License-Identifier: AGPL-3.0-only
import { useRef } from 'react';
export function usePrevious<T>(initialValue: T, currentValue: T): T {
const previousValueRef = useRef<T>(initialValue);
const result = previousValueRef.current;
previousValueRef.current = currentValue;
return result;
}