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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script>
window.onmessage = function (event) {
if (event.data !== "register") {
return;
}
var promise = navigator.serviceWorker.register("worker.js");
window.onmessage = function (event1) {
if (event1.data !== "register") {
return;
}
promise = promise.then(function (registration) {
return navigator.serviceWorker.register("worker2.js");
});
window.onmessage = function (event2) {
if (event2.data !== "unregister") {
return;
}
promise.then(function (registration) {
registration.unregister();
});
window.onmessage = null;
};
};
};
</script>
</head>
<body>
This is a test page.
</body>
<html>
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