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<!--
Any copyright is dedicated to the Public Domain.
-->
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<script type="text/javascript">
function wait_until_controlled() {
return new Promise(function(resolve) {
if (navigator.serviceWorker.controller) {
resolve();
return;
}
navigator.serviceWorker.addEventListener('controllerchange', function onController() {
if (navigator.serviceWorker.controller) {
navigator.serviceWorker.removeEventListener('controllerchange', onController);
resolve();
}
});
});
}
addEventListener('load', function(event) {
var registration;
navigator.serviceWorker.register('worker.js').then(function(swr) {
registration = swr;
// While the iframe below is a navigation, we still wait until we are
// controlled here. We want an active client to hold the service worker
// alive since it calls unregister() on itself.
return wait_until_controlled();
}).then(function() {
var frame = document.createElement('iframe');
document.body.appendChild(frame);
frame.src = 'fake_download';
// The service worker is unregistered in the fetch event. The window and
// frame are cleaned up from the browser chrome script.
});
});
</script>
</body>
</html>