dom/events/test/test_bug656954.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=656954
   5 -->
   6 <head>
   7   <title>Test for Bug 656954</title>
   8   <script src="/tests/SimpleTest/SimpleTest.js"></script>
   9   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  10 </head>
  11 <body>
  12 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=656954">Mozilla Bug 656954</a>
  13 <p id="display"></p>
  14 <div id="content" style="display: none">
  15
  16 </div>
  17 <pre id="test">
  18 <script type="application/javascript">
  19
  20 /** Test for Bug 656954 **/
  21
  22 var e = document.createEvent("Event");
  23 is(e.defaultPrevented, false,
  24    "After creating event defaultPrevented should be false");
  25 e.initEvent("foo", true, true);
  26 var el = document.createElement("div");
  27 el.addEventListener("foo",
  28   function(evt) {
  29     evt.preventDefault();
  30   });
  31 el.dispatchEvent(e);
  32 is(e.defaultPrevented, true, "preventDefault() should have been called!");
  33
  34 e = document.createEvent("Event");
  35 e.initEvent("foo", true, false);
  36 el.dispatchEvent(e);
  37 is(e.defaultPrevented, false, "preventDefault() should not have any effect!");
  38
  39 </script>
  40 </pre>
  41 </body>
  42 </html>