mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Tim Yung
305b4253c2
Summary: Changes `Appearance.addChangeListener` to return an `EventSubscription` object that has a `remove()` method on it. In an upcoming commit, calling `Appearance.removeChangeListener` will lead to a deprecation warning. Changelog: [General][Change] - `Appearance.addChangeListener` now returns an `EventSubscription`. Reviewed By: kacieb Differential Revision: D26696388 fbshipit-source-id: d0bdeffff3a2a366b3c11b6dc1417dfb2f1455c2
32 lines
828 B
JavaScript
32 lines
828 B
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow strict-local
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*/
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import {useMemo} from 'react';
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import {useSubscription} from 'use-subscription';
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import Appearance from './Appearance';
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import type {ColorSchemeName} from './NativeAppearance';
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export default function useColorScheme(): ?ColorSchemeName {
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const subscription = useMemo(
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() => ({
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getCurrentValue: () => Appearance.getColorScheme(),
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subscribe: callback => {
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const appearanceSubscription = Appearance.addChangeListener(callback);
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return () => {
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appearanceSubscription.remove();
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};
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},
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}),
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[],
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);
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return useSubscription(subscription);
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}
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