fix or replace offline-plugin

[derhuerst]

Follow-up of #4607.

offline-plugin doesn't work with Webpack 5 and seems unmaintained: NekR/offline-plugin#497

Personally, I haven't seen the offline caching work with digitransit-ui. Has someone seen it work recently?

[optionsome]

Yes it does work but u have to edit https://github.com/HSLdevcom/digitransit-ui/blob/v2/app/buildInfo.js#L2 to make it work.

[derhuerst]

Yes it does work but u have to edit […] to make it work.

Is that deployed somewhere?

[optionsome]

Yes it does work but u have to edit […] to make it work.

Is that deployed somewhere?

https://reittiopas.hsl.fi/etusivu for example. Also, if I don't remember wrong, I think having a service worker was a requirement for PWAs to work.

[derhuerst]

https://reittiopas.hsl.fi/etusivu for example.

Indeed, there is a service worker in place.

How do I check if the offline support works? When turning off my laptops internet connection and reloading, I can't use the Reittiopas website offline.

[optionsome]

Indeed, there is a service worker in place.

How do I check if the offline support works? When turning off my laptops internet connection and reloading, I can't use the Reittiopas website offline.

Oh, I don't think it does work offline necessarily. The service worker is just there so we have more control over the caching behaviour and for the PWA support.