react-native-reanimated/lib/module/reanimated2/PlatformChecker.js

More powerful alternative to Animated library for React Native.

'use strict';

import { Platform } from 'react-native';

// This type is necessary since some libraries tend to do a lib check
// and this file causes type errors on `global` access.
export function isJest() {
  return !!process.env.JEST_WORKER_ID;
}

// `isChromeDebugger` also returns true in Jest environment, so `isJest()` check should always be performed first
export function isChromeDebugger() {
  return !global.nativeCallSyncHook || !!global.__REMOTEDEV__;
}
export function isWeb() {
  return Platform.OS === 'web';
}
export function isAndroid() {
  return Platform.OS === 'android';
}
function isWindows() {
  return Platform.OS === 'windows';
}
export function shouldBeUseWeb() {
  return isJest() || isChromeDebugger() || isWeb() || isWindows();
}
export function nativeShouldBeMock() {
  return isJest() || isChromeDebugger() || isWindows();
}
export function isFabric() {
  return !!global._IS_FABRIC;
}
export function isWindowAvailable() {
  // the window object is unavailable when building the server portion of a site that uses SSG
  // this function shouldn't be used to conditionally render components
  // https://www.joshwcomeau.com/react/the-perils-of-rehydration/
  // @ts-ignore Fallback if `window` is undefined.
  return typeof window !== 'undefined';
}
export function isReducedMotion() {
  return isWeb() ? isWindowAvailable() ?
  // @ts-ignore Fallback if `window` is undefined.
  !window.matchMedia('(prefers-reduced-motion: no-preference)').matches : false : !!global._REANIMATED_IS_REDUCED_MOTION;
}
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