32 строки
828 B
JavaScript
32 строки
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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