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<!DOCTYPE html>
<title>Service Worker: frame for getRegistrations()</title>
<script>
var scope = 'scope-for-getregistrations';
var script = 'empty-worker.js';
var registration;
navigator.serviceWorker.register(script, { scope: scope })
.then(function(r) { registration = r; window.parent.postMessage('ready', '*'); })
self.onmessage = function(e) {
if (e.data == 'unregister') {
registration.unregister()
.then(function() {
e.ports[0].postMessage('unregistered');
});
}
};
</script>
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