react-native-web/dist/exports/AppState/index.js.flow

React Native for Web

/**
 * Copyright (c) Nicolas Gallagher.
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @noflow
 */

'use client';

import invariant from 'fbjs/lib/invariant';
import EventEmitter from '../../vendor/react-native/vendor/emitter/EventEmitter';
import canUseDOM from '../../modules/canUseDom';

// Android 4.4 browser
const isPrefixed = canUseDOM && !document.hasOwnProperty('hidden') && document.hasOwnProperty('webkitHidden');
const EVENT_TYPES = ['change', 'memoryWarning'];
const VISIBILITY_CHANGE_EVENT = isPrefixed ? 'webkitvisibilitychange' : 'visibilitychange';
const VISIBILITY_STATE_PROPERTY = isPrefixed ? 'webkitVisibilityState' : 'visibilityState';
const AppStates = {
  BACKGROUND: 'background',
  ACTIVE: 'active'
};
let changeEmitter = null;
declare export default class AppState {
  static isAvailable: any,
  static currentState(): any,
  static addEventListener(type: string, handler: Function): any,
}