checkEnvironment.ts

  /**
   * Returns `true` if code is running with JSDOM
   */
  static get isJSDOM(): boolean {
    return navigator?.userAgent?.includes("Node.js") || navigator?.userAgent?.includes("jsdom");
  }

  /**
   * Returns `true` if code is running in a web browser environment
   */
  static get isWebWorker(): boolean {
    return global && typeof global.WorkerGlobalScope !== "undefined" && global.self instanceof global.WorkerGlobalScope;
  }

  /**
   * Returns `true` if code is running in a web browser environment
   */
  static get isBrowser(): boolean {
    return (typeof window !== "undefined" || Logger.isWebWorker) && !Logger.isJSDOM;
  }

  /**
   * Returns `true` if code is running in a web browser environment
   */
  static get isIE(): boolean {
    return Logger.isBrowser && document && window && document.documentMode && window.StyleMedia;
  }

  /**
   * Returns `true` if code is running in React Native
   */
  static get isReactNative(): boolean {
    return Logger.isBrowser && navigator && navigator.product === "ReactNative";
  }

  /**
   * Returns `true` if code is running in React Native and the Debugger is attached
   */
  static get isReactNativeDebugger(): boolean {
    return Logger.isReactNative && typeof global?.DedicatedWorkerGlobalScope !== "undefined";
  }

  /**
   * Returns `true` if code is running in a Node.js-like environment (including Electron)
   */
  static get isNode(): boolean {
    // Note that Webpack et al are often adding process, module, require, etc.
    return typeof process === "object" && typeof process.env === "object" && !Logger.isBrowser;
  }