I've built a Progressive Web App that uses caching, but it's unclear to me whether users can (accidentally or on purpose) clear the service worker cache, which may clear my tracking data.
When a user clears their browsing data / cookies, this clears all site storage which includes the SW cache, cookies, local storage, indexeddb, and any other local caching system.
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Furthermore, Ctrl-F5 forces a cache refresh, and is intended to abandon all cached content including service worker cache and just retrieve all content from the servers again.
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"Clear site data" in Chrome 76 will delete the caches and the worker, however the deleted worker remains "activated and running". So that's a case that needs dealing with.
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