The categories code makes use of the wgCategories config variable inside resources/skins.minerva.categories/init.js
We are considering removing this from core (T206250)
Rather than continue to adopt it, let's remove it as it's not used in our codebase. The category feature for users in beta works without it.
- Opt into beta.
- Log in.
- Visit https://en.m.wikipedia.beta.wmflabs.org/wiki/CategoryTest
- Click category button
- Verify categories show.