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0f5dc33918
This probably should have been part of https://github.com/element-hq/element-call/pull/2984
19 lines
504 B
TypeScript
19 lines
504 B
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE in the repository root for full details.
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*/
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import { useRef } from "react";
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/**
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* React hook that returns the value given on the initial render.
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*/
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export function useInitial<T>(getValue: () => T): T {
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const ref = useRef<{ value: T }>(undefined);
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// only evaluate `getValue` if the ref is undefined
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ref.current ??= { value: getValue() };
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return ref.current.value;
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}
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