MathJaX v3 support

[tani]

Hi there, I am author of the following plugins

• MathJaX v3 plugin of VNote Support MathJaX v3 vnotex/vnote#1221
• MathJaX v3 plugin of Remark Add support MathJax remarkjs/remark-math#40
• MathJaX v3 plugin of Markdown-It https://github.com/nzt/markdown-it-mathjax3

As I'd like to use MathJaX v3 in map-core, I open this issue. MathJaX v3 has a new plugin for bussproofs missing in the older versions, and also, has a SVG rendering without any fonts. There is good conformance for your project at the SVG feature.

I've already implemented markdown-it plugin with TypeScript based on markdown-it-katex as like marp-core. Thus, I can add MathJaX plugin to your project immediately.

I'd like to ask you, which options do you choose?

1. Replacing KaTeX plugin with MathJaX plugin
2. Adding MathJaX plugin, and keeping KaTeX plugin

Thanks!

[yhatt]

Thanks for your suggestion. Due to slow rendering and not supported server-side rendering, we had given up using MathJax v2 in Marp. But MathJax v3 seems to have got rid of many messy issues.

And we had some requests about math typesettings, such as yhatt/marp#103 and yhatt/marp#181. They are not yet resolved by KaTeX's limitations and might be fix them by MathJax v3 integration.

I prefer option 2 to make compatibility with exist decks made with KaTeX for now.

[tani]

Okay, check my pull request #165 . I've implemented option 2 because I also thought as you 😉

[yhatt]

NOTE: Keep in mind that we require to support auto-scaling in math block when you will work for Marp Core integration.

[tani]

At least, all tests are passed including a new test I added for auto-scaling in math block.
I just borrow all test code from your project.