ENH: Display source & render simultaneously

[westurner]

Is your feature request related to a problem? Please describe.

Users can read the source and the render simultaneously; at the same time, in order to learn the symbols.

Describe the solution you'd like

New menu options?

• Menu
  • Show Math As
    • [x] MathML (in a new tab)
    • [x] TeX Commands
  • Math settings
    • Math renderer
      • [x] HTML-CSS
      • [x] Plain Source
      • [ ] Plain Source && {HTML-CSS,}
        • [ ] MathML
        • [ ] TeX

It could say: "show source and render" or something more usable

Describe alternatives you've considered

• toggle back and forth between Plain Source and e.g. HTML-CSS
• click/tap and open each rendered ah expression in a new tab each with "Show Math As"

Additional context

• Jupyter notebooks; which have markdown inputs and variously-mimetype'd obj._repr_mimebundle_() outputs like text/plain and text/html but not yet text/html+rdfa or application/ld+json (which is - as a sidenote - tragic, in terms of symbolic expressions, because these could all be Linked Data expressions that we then also want to review: (source, tex, RDF_with_URIs))

[dpvc]

While we will continue to make updates to version 2 for another year at least, no feature development for v2 is planned. There is currently no "Plain Source" output format in MathJax v3, so there would be more work involved in adding the feature to v3. Still, I have added this as a feature request, though there are still a number of critical features to be added to v3, so I would not expect to see it in the near future.

[westurner]

Is the Plain Source input stored as e.g. obj._inputstr? Sorry I'd need to read the tests

[dpvc]

I don't know anything about Jupyter's object structures, or what obj is in your example. But you can obtain the original input form from any DOM element el in the MathJax output for a typeset expression using

MathJax.Hub.getJaxFor(el).originalText

if that helps.

[westurner]

But there's no widget that'll show that next to the rendered expression?

[dpvc]

No, that is not a common use case, and there is nothing built into MathJax to provide that.

[westurner]

• Use Case: Learning and teaching mathematical notation