third_party/WebKit/LayoutTests/fast/dom/MutationObserver/script-append.html

   1 <!DOCTYPE html>
   2 <script src="../../../resources/js-test.js"></script>
   3 <script>
   4 description('Test that an appended script does NOT invoke MutationObserver callbacks');
   5
   6 var mutationsDelivered = false;
   7 function callback(mutations) {
   8     mutationsDelivered = true;
   9 }
  10
  11 var observer = new MutationObserver(callback);
  12 var div = document.createElement('div');
  13 observer.observe(div, {attributes: true});
  14 div.setAttribute('foo', 'bar');
  15 shouldBeFalse('mutationsDelivered');
  16 var scriptDidRun = false;
  17 var script = document.createElement('script');
  18 script.textContent = 'scriptDidRun = true';
  19 shouldBeFalse('scriptDidRun');
  20 document.head.appendChild(script);
  21 shouldBeTrue('scriptDidRun');
  22 shouldBeFalse('mutationsDelivered');
  23 </script>