mozilla-release/dom/serviceworkers/test/claim_clients/client.html

<!--
  Any copyright is dedicated to the Public Domain.
  http://creativecommons.org/publicdomain/zero/1.0/
-->
<!DOCTYPE HTML>
<html>
<head>
  <title>Bug 1130684 - claim client </title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
<script class="testbody" type="text/javascript">

  if (!parent) {
    info("This page shouldn't be launched directly!");
  }

  window.onload = function() {
    parent.postMessage("READY", "*");
  }

  navigator.serviceWorker.oncontrollerchange = function() {
    parent.postMessage({
      event: "controllerchange",
      controller: (navigator.serviceWorker.controller !== null)
    }, "*");
  }

  navigator.serviceWorker.onmessage = function(e) {
    parent.postMessage({
      event: "message",
      data: e.data
    }, "*");
  }

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