MathJax 4

[Rob Beezer]

MathJax 4 was released a couple months ago. Now is the time for us to make the
move.

Ideal timeline: merge late November. Migrate to the CLI and Runestone as
classes wind down for semester-breaks. In place before JMM.

Testing parameters have been updated:

stringparam debug.mathjax4 set to "yes" will get you
- latest version 4 (now 4.0.0)
- tex-mml-chtml.js file/configuration/fonts (similar to current)

stringparam debug.mathjax.svg set to "yes" will get you
- tex-svg.js file/configuration/fonts (seems to be new default recommendation)

This will require coordination and help from (at least): Brad R (Runestone),
David A (PreFigure), Rob (Braille), Jason S (React version), David F (knowls,
see below), Alex J (WeBWork, maybe). We'll need help from MathJax proper
(Davide C, Volker S) for PreFigure and Braille (see below). For now, let's use
this thread, and it can wander through various topics.

Section 7 of the sample article looks pretty good.

* Knowls inside display math need help. This is a "\knowl" macro David Farmer
has supported. Lately in js_lib/mathjaxknowl3.js from early 2022.

* There is some change with special LaTeX characters tagging equations, I'll
chase that down.

* script/mjsre/mj-sre-page.js is essential to the production of PreFigure
tactile diagrams and conversions to braille. I'd be pretty confident it needs
work, or at least a review, but have not tested it yet. This is where MathJax
could help us.

GitHub issue for tracking some/all of this:

https://github.com/PreTeXtBook/pretext/issues/1841

Interested and affected parties can test and help as appropriate (please!).
Invariably some bugfixes will follow this change, but I'd sure like to minimize
those.

Thanks,
Rob

[Bradley Miller]

I did a Runestone build and browsed through the various sections of the sample book.  The Runestone components with math in them looked like they were all rendering correctly.   I can give the svg flag a try later.

Brad R??  — Brad Runestone and my friend Tim Apple?

Brad Miller
Professor Emeritus, Luther College
Founder, Runestone Academy LTD
Blog: http://reputablejournal.com

Set up a time to meet with me.

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[Rob Beezer]

First baby step. I think

js_lib/mathjaxknowl.js

is obsolete. Replaced by a v3 version.

I'm going to remove it, unless somebody screams.

I asked about this back in December:
https://groups.google.com/g/pretext-dev/c/2UMUBW8Sjgc/m/ZR-lg7k3BAAJ

as part of a putative clean-up of the js_lib directory. Which went nowhere.

If we make a mathjaxknowl4.js perhaps it can move somewhere closer to all the
other JS.

Rob

[Rob Beezer]

On 10/14/25 09:20, 'Rob Beezer' via PreTeXt development wrote:
> *  There is some change with special LaTeX characters tagging equations, I'll
> chase that down.

Argument to \tag{} is now in "text mode" so the "#" character needs to be
escaped. But can't be done now, lest the "\" bleeds through.

So I've got the change on a branch I'm starting to build up.

Rob