Files
react-native/Libraries/Utilities/useColorScheme.js
T
Héctor Ramos 51681e80ab useColorScheme hook (#26143)
Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/26143

A new useColorScheme hook is provided as the preferred way of accessing the user's preferred color scheme (aka Dark Mode).

Changelog:

[General] [Added] - useColorScheme hook

Reviewed By: yungsters

Differential Revision: D16860954

fbshipit-source-id: 8a2b6c2624ed7cf431ab331158bc5456cde1f185
2019-08-31 11:22:43 -07:00

32 lines
786 B
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @flow
*/
'use strict';
import {useMemo} from 'react';
import {useSubscription} from 'use-subscription';
import Appearance from './Appearance';
import type {ColorSchemeName} from './NativeAppearance';
export default function useColorScheme(): ?ColorSchemeName {
const subscription = useMemo(
() => ({
getCurrentValue: () => Appearance.getColorScheme(),
subscribe: callback => {
Appearance.addChangeListener(callback);
return () => Appearance.removeChangeListener(callback);
},
}),
[],
);
return useSubscription(subscription);
}