chrome/test/data/extensions/api_test/mutation_observers/background.js

   1 // Copyright (c) 2012 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 window.addEventListener('DOMContentLoaded', function() {
   6   var body = document.body;
   7   var div = body.appendChild(document.createElement('div'));
   8   var input1 = body.appendChild(document.createElement('input'));
   9   var input2 = body.appendChild(document.createElement('input'));
  10
  11   input1.focus();
  12   input1.addEventListener('blur', function() {
  13     div.setAttribute('baz', 'bat');
  14   });
  15
  16   var success = false;
  17   var mutationsDelivered = false;
  18
  19   var observer = new MutationObserver(function() {
  20     mutationsDelivered = true;
  21     if (success)
  22       chrome.test.succeed();
  23   });
  24   observer.observe(document, { subtree: true, attributes: true });
  25
  26   // The getAll callback should be counted as a V8RecursionScope and cause
  27   // the delivery of MutationRecords to be delayed until it has exited.
  28   chrome.windows.getAll(function() {
  29     div.setAttribute('foo', 'bar');
  30     input2.focus();
  31     if (mutationsDelivered)
  32       chrome.test.fail();
  33     else
  34       success = true;
  35   });
  36 });