make4ht creates images for double-dollar formulas despite mathjax option

Question

I want to convert the following (minimized) TeX file to HTML:

\documentclass{article}
\begin{document}
We have $a = a$, \(a = a\) and also
\[c = c\] and even
\begin{equation*}
  E = mc^2.
\end{equation*}
All seems to work, except for
$$F = ma.$$
\end{document}

My config file is

\RequirePackage{amsmath,amsfonts,amssymb,amsthm,enumitem,booktabs,float,graphicx,hyperref}
\Preamble{xhtml}
\Configure{MathJaxConfig}{{
tex: {
      tags: "ams",
      \detokenize{%
      inlineMath: [ [’$’,’$’], ["\(","\)"] ],
      displayMath: [ [’$$’,’$$’], ["\[","\]"] ],}
      processEscapes: true,
      processEnvironments: true,
      packages: [’base’, ’color’, ’ams’, ’boldsymbol’, ’newcommand’, ’verb’]
  }
}}
\Configure{MathjaxSource}{https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml-full.js}
\def\eqref#1{$\mathrm{(\ref{#1})}$}
\begin{document}
\EndPreamble

and the command I run is

make4ht -c /CONF/sample.cfg markup.tex "mathjax"

Unfortunately, this produces images for every formula that is wrapped between two dollar signs $$. How can I fix this? I have tried to mimic the solutions to this and this answers by Michal by detokenizing everything between two dollar signs but it did not work.

Also, I do not want to use MathML as it does not parse my formulas as good as TeX-to-MathJax.

someone may provide a make4ht config, but the input latex files should not have $$ which is not supported latex syntax. — David Carlisle, Oct 10 '22 at 18:51
I don't quite understand what you mean by that. Are you saying make4ht cannot deal with $$? — qarabala, Oct 10 '22 at 18:56
No I am saying $$ is not latex, if make4ht supports it that is because it is supporting some non-latex primitive tex constructs. — David Carlisle, Oct 10 '22 at 19:02
Ok, I get the point. But the majority does use $$ and I have to account for that. So I preferably need a native make4ht solution. If this is not possible, then I will have to read and replace each opening and closing $$ with \[...\] manually before feeding the string to make4ht. — qarabala, Oct 10 '22 at 19:08
On an up-to-date TL installation (with make4ht version v0.3l), your setup produces no images, i.e $$F = ma.$$ becomes \[F = ma.\] in the HTML output and is rendered correctly — DG', Oct 10 '22 at 19:47
as @DG' said, if you have up-to-date TeX Live installation, your code should work (except for the error message caused by equation* not defined, you need to use amsmath). I've added code to support $$ few weeks ago. — michal.h21, Oct 10 '22 at 19:59

score 3 · Accepted Answer · answered Oct 10 '22 at 20:10

It should work with the up-to-date TeX Live distribution, but you can add the support also using the following configuration file:

\Preamble{xhtml}
\catcode`\:=11
\Configure{$$}{\:HandleMathjaxCatcodes}{\:RestoreMathjaxCatcodes}{\expandafter\AltlDisplayDollars}
\long\def\AltlDisplayDollars#1$${\alteqtoks{\[#1\]}$$}
\catcode`\:=12
\begin{document}
\EndPreamble

It converts $$ in your source to \[ in the output, so you don't even need to provide any configuration to MathJax. This is the resulting HTML code:

<!-- l. 4 --><p class='noindent'>We have \(a = a\), \(a = a\) and also \[c = c\] and even \begin {equation*}  E = mc^2.  \end {equation*} All seems to work, except for
                                 \[F = ma.\]
</p>

I confirm that the problem was caused by the old version of texlive. As always, thanks a lot michal! — qarabala, Oct 11 '22 at 15:12

make4ht creates images for double-dollar formulas despite mathjax option

1 Answers1