Why and how do Discourse forums work when offline?

Hello. I would like to know why there is a feature where you can use Discourse offline? (It partially works, some of the user cards work, and a few topics are loadable.) However, the issue is that it lacks functionality and non-loaded pages. I would also like to know how the offline stuff works.

Probably because of the javascript and data cached locally in the browser.

Clear your browser cache and I suspect you will no longer have these facilities!

It’s not intended to run fully offline, but this behaviour gives it some resilience when dealing with e.g. bad mobile connections.


We cache the last hundreds of requests on the browser by leveraging the WorkBoxJS library.

If an endpoint, like a user card, wasn’t loaded in recently it won’t be cached and won’t be accessible while offline.