@sam and all interested in typing math in Discourse. I’ve updated the discourse-math plugin so that it uses MathJax V3, rather than the much slower and very outdated V2. As expected, the result is a much snappier user experience, while still maintaining the feature rich environment as compared to Ka…

Regarding: https://github.com/discourse/discourse/pull/36212/files This is fantastic :hugs: , but I wonder if we can use this an an opportunity to trim down our repo a bit. Now that we moved mathjax to core, we can lean on pnpm to pull the package and avoid bundling all the source like we do for…

[image] sam: I wonder if we can use this an an opportunity to trim down our repo a bit. Now that we moved mathjax to core, we can lean on pnpm to pull the package and avoid bundling all the source like we do for FullCalendar for example. Yes, I think that’s certainly the right thing to do. I…

[image] mcmcclur: So, I guess you’ll build a loadMathJax function for your library that’s used to load MathJax? Yes, exactly. A good one to copy is morphlex: frontend/discourse/app/lib/load-morphlex.js 15e8a8042 /* Plugins & themes are unable t…

[image] sam: Give us a few days I want to consult with with the dev xp team here. Thanks so much for your efforts here! I wonder if you’ve been able to discuss with your developer experience folks yet? I’d be happy to help, if I can. My impression, though, is that there’s really nothing I can…

I’ve modified the discourse-math plugin so that it can parse a lot more mathematical input. @sam When I first contributed to this plugin in 2017, I recall that you were quite firm that you wanted very strict parsing. Let me say up front that my main motivation to relax and extend the parsing was so…

@mcmcclur Thank you for your work. It would be great to see these features in the core.

Thanks so much Mark. My big blocker here is that I really want to move to the new patterns for dependency distribution, see: JS Dependency Distribution: MathJax Migration Guide sam: looking at discourse/discourse explain the new patterns for js dependency distribution, investigate how mat…

@mcmcclur I was fiddling with this today: https://github.com/discourse/discourse/pull/36814 Far from ready … but stuff sort of boots with 4.1 which is nice.

[image] sam: Far from ready … but stuff sort of boots with 4.1 which is nice. Yes, this is definitely progress! The first key issue to address, as I suspect you know, is that the fonts are not found. In fact, I fiddled with this line in discourse-math-mathjax.js: fontURL: getURLWithCDN("/as…

Upgrading Mathjax to version 4

Development

mcmcclur (Mark McClure) November 25, 2025, 11:38am 2

Pull request to upgrade MathJax to V3 made with all tests passed!

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Upgrading to New Math Plugin Support math	11	655	May 18, 2022
A new release of Discourse Math Announcements math	2	264	January 18, 2026
Discourse Math Plugin official , math , included-in-core	6	37092	May 26, 2026
MathJax plugin could not find module discourse/lib/load-script Support	5	1574	March 17, 2015
Plugin not work and show Support	8	3008	July 15, 2017

Upgrading Mathjax to version 4

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