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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1298970
-->
<head>
  <title>Test for Bug 1298970</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1298970">Mozilla Bug 1298970</a>
<p id="display"></p>
<div id="inner"></div>
<script class="testbody" type="text/javascript">

/** Test for Bug 1298970 **/
var target = document.getElementById("inner");
var event = new Event("test", { bubbles: true, cancelable: true });

is(event.cancelBubble, false, "Event.cancelBubble should be false by default");

target.addEventListener("test", (e) => {
  e.stopPropagation();
  is(e.cancelBubble, true, "Event.cancelBubble should be true after stopPropagation");
}, true);

target.dispatchEvent(event);

</script>
</body>
</html>