Bug: Updating the service worker after a release might fail

[Dschoordsch]

I ran into an issue with Safari during an update. The service worker was 2 releases behind and could not load any source files. The production build is overwriting old versions, for example:

'url': 'https://action-files.parabol.co/production/build/no_entry_a9bd1d42811914b6f10b.svg'

Updating the service worker though is triggered by either useTrebuchetEvents or useServiceWorkerUpdater. These files might not be available in the browser and the current service worker cannot retrieve those. As a workaround the client might need to clear their site data.

There are a couple of possible solutions:

• store multiple versions of production in subdirectories
• move the update logic inside the service worker
• if the service worker receives 404s from supposedly good files, unregister itself