I have a recently upgraded discourse instance (discourse 92bb728fe5, discourse-math f9cf94d2). I have configured discourse-math to use katex, but the problem appears with mathjax too. I observe that math is rendered correctly in post previews, in posts themselves, but not in chats. Below are the screenshots:
I may be wrong, but I think that Discourse Chat does not use the same “rendering method” as in topics and posts, I haven’t tested it well but I think it barely supports some features of Markdown
This was a topic of discussion before, and judging by the responses it is a supported feature.
Moved to Contribute > Feature request as enabling each Customization > Plugin or Customization > Theme component in chat is a new feature that needs to be planned, written and tested as we don’t automatically apply all the same markdown cooking of posts.
I pushed support for this in chat:
https://github.com/discourse/discourse-math/commit/6f59c4691239223d20e0723918375b0a3ac6ede0
This plugin would need multiple changes to avoid jumpyness, but that will have to wait.
It seems that it only works for MathJax. Maybe we need another patch for KaTeX?
Indeed, that should do it:
https://github.com/discourse/discourse-math/pull/88
Will merge it next week.
