packages/fxa-content-server/app/scripts/lib/screen-info.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

// module to calculate screen dimentions given a window.

var NOT_REPORTED_VALUE = 'none';

function ScreenInfo(win) {
  var documentElement = win.document.documentElement || {};
  var screen = win.screen || {};

  // for more information:
  // http://quirksmode.org/mobile/viewports.html and
  // http://quirksmode.org/mobile/viewports2.html
  this.clientHeight = documentElement.clientHeight || NOT_REPORTED_VALUE;
  this.clientWidth = documentElement.clientWidth || NOT_REPORTED_VALUE;
  this.devicePixelRatio = win.devicePixelRatio || NOT_REPORTED_VALUE;
  this.screenHeight = screen.height || NOT_REPORTED_VALUE;
  this.screenWidth = screen.width || NOT_REPORTED_VALUE;
}

export default ScreenInfo;