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/**
* Service Worker that runs in 2 modes: 1) direct pass-through via
* fetch(event.request) and 2) indirect pass-through via
* fetch(event.request.url).
*
* Because this is updating a pre-existing mochitest that didn't use a SW and
* used a single test document, we use a SW idiom where the SW claims the
* existing window client. And because we operate in two modes and we
* parameterize via URL, we also ensure that we skipWaiting.
**/
/* eslint-env serviceworker */
// We are parameterized by "mode".
const params = new URLSearchParams(location.search);
const fetchMode = params.get("fetchMode");
// When activating on initial install, claim the existing window client.
// For synchronziation, also message the controlled document to report our mode.
self.addEventListener("activate", event => {
event.waitUntil(
(async () => {
await clients.claim();
const allClients = await clients.matchAll();
for (const client of allClients) {
client.postMessage({
fetchMode,
});
}
})()
);
});
// When updating the SW to change our mode of operation, skipWaiting so we
// advance directly to activating without waiting for the test window client
// to stop being controlled by our previous configuration.
self.addEventListener("install", () => {
self.skipWaiting();
});
self.addEventListener("fetch", event => {
switch (fetchMode) {
case "direct":
event.respondWith(fetch(event.request));
break;
case "indirect":
event.respondWith(fetch(event.request.url));
break;
}
});
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