lib/html/src/Device.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/**
 * Utils for device detection.
 */
class _Device {
  /**
   * Gets the browser's user agent. Using this function allows tests to inject
   * the user agent.
   * Returns the user agent.
   */
  static String get userAgent => window.navigator.userAgent;

  /**
   * Determines if the current device is running Opera.
   */
  static bool get isOpera => userAgent.contains("Opera", 0);

  /**
   * Determines if the current device is running Internet Explorer.
   */
  static bool get isIE => !isOpera && userAgent.contains("MSIE", 0);

  /**
   * Determines if the current device is running Firefox.
   */
  static bool get isFirefox => userAgent.contains("Firefox", 0);

  /**
   * Determines if the current device is running WebKit.
   */
  static bool get isWebKit => !isOpera && userAgent.contains("WebKit", 0);
}