@unimodules/react-native-adapter/src/Platform.ts

import { Platform as ReactNativePlatform, PlatformOSType } from 'react-native';

import { isDOMAvailable } from './environment/browser';

export type PlatformSelectOSType = PlatformOSType | 'native' | 'electron' | 'default';

export type PlatformSelect = <T>(specifics: { [platform in PlatformSelectOSType]?: T }) => T;

const Platform = {
  /**
   * Denotes the currently running platform.
   * Can be one of ios, android, web.
   */
  OS: ReactNativePlatform.OS,
  /**
   * Returns the value with the matching platform.
   * Object keys can be any of ios, android, native, web, default.
   *
   * @ios ios, native, default
   * @android android, native, default
   * @web web, default
   */
  select: ReactNativePlatform.select as PlatformSelect,
  /**
   * Denotes if the DOM API is available in the current environment.
   * The DOM is not available in native React runtimes and Node.js.
   */
  isDOMAvailable,
};

export default Platform;