Macro \class fails to assign compound class to an element

[dainiak]

Using tex-svg.js, I’m trying to do this type of command: \class{reddish boldish}{e=mc^2} where say reddish and boldish are two CSS classes. That works fine in MathJax v2, but results in Math output error in MathJax v3. Trying \class{reddish}{\class{boldish}{e=mc^2}} results in an error as well. Trying \class{reddish}{{\class{boldish}{e=mc^2}}} produces an output, though it does not achieve what I want as it does not create a single element with two CSS classes simultaneously applied to it. Great overall work on v3 though, keep going!

[zorkow]

Thank you!
And thanks for reporting this. I can confirm this. I get a Missing close brace error during TeX parsing.

In addition when switching on the a11y extension both expressions during semantic enrichment.

[zorkow]

There's a couple of issues:

• Parse error for \class{reddish}{\class{boldish}{e}}
• Enrichment error for \class{reddish}{{e}} (but not for \class{reddish}{e}). SREs output is fine so it has to be in semantic-enrich.ts.
• \class{reddish}{{e}} produces multiple class entries.

[dpvc]

I added a pull request that addresses the original issue with multiple classes in the \class{} and nested \class{} calls, as well as the three issues Volker reported.