Service Workers (W3C)

1. Service worker concepts

   Registration, scope and lifetime.

2. Registration

   navigator.serviceWorker.register and scope rules.

3. Install and activate

   Lifecycle: installing, waiting, activating.

4. Fetch event handling

   FetchEvent.respondWith interception.

5. Cache storage

   Cache and CacheStorage interfaces.

6. Update algorithm

   Update checks and byte-for-byte comparison.

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