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self.addEventListener('fetch', function(event) {
const url = event.request.url;
if (url.includes('dummy') && url.includes('?')) {
event.waitUntil(async function() {
let destination = new URL(url).searchParams.get("dest");
var result = "FAIL";
if (event.request.destination == destination ||
(event.request.destination == "empty" && destination == "")) {
result = "PASS";
}
let cl = await clients.matchAll({includeUncontrolled: true});
for (i = 0; i < cl.length; i++) {
cl[i].postMessage(result);
}
}())
}
event.respondWith(fetch(event.request));
});