chrome/test/data/extensions/api_test/executescript/in_frame/script.js

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 function getStyle(elem, name) {
   6   if (document.defaultView && document.defaultView.getComputedStyle) {
   7     name = name.toLowerCase();
   8
   9     try {
  10       var s = document.defaultView.getComputedStyle(elem, '');
  11       return s && s.getPropertyValue(name);
  12     } catch (ex) {
  13       return null;
  14     }
  15   } else {
  16     return null;
  17   }
  18 }
  19
  20 var bElement = document.getElementById('test2');
  21 var display = getStyle(bElement, 'display').toLowerCase();
  22 var extensionPort = chrome.runtime.connect();
  23 extensionPort.postMessage({message: display});