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self.addEventListener('fetch', function(event) {
if (event.request.url.includes('dummy')) {
event.waitUntil(async function() {
let destination = new URL(event.request.url).searchParams.get("dest");
let clients = await self.clients.matchAll({"includeUncontrolled": true});
clients.forEach(function(client) {
if (client.url.includes("fetch-destination-iframe")) {
if (event.request.destination == destination) {
client.postMessage("PASS");
} else {
client.postMessage("FAIL");
}
}
})
}());
}
event.respondWith(fetch(event.request));
});