An unexpected result when using make4ht+mathjax-node-page

Question

I exactly follow the instruction from latex mathjax node but getting some unexpected result, first in section 6 accents, the math symbols are not corrected, second, in HTML some information is missing in pdf file, it should be third, in theorem environment, some font in the HTML file looks like too big.

Here is my error message when I run make4ht

[STATUS]  make4ht: Conversion started
[STATUS]  make4ht: Input file: maths.tex
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
--- warning --- \special{t4ht~...} without \special{t4ht~}
[WARNING] domfilter: DOM parsing of maths.html failed:
[WARNING] domfilter: ...ive/2019/texmf-dist/tex/luatex/luaxml/luaxml-mod-xml.lua:175: Unbalanced Tag (/msup) [char=37676]

Formula <math xmlns="http://www.w3.org/1998/Math/MathML" display="block" class="equation">
      <msub><mrow><mi>u</mi></mrow><mrow><mn>1</mn></mrow></msub> <mo class="MathClass-rel">=</mo> <!--l. 216--><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow>−2γ𝜖</mrow><mrow>2</mrow>s<mrow>2</mrow>+μ𝜖<mrow>3</mrow><mstyle mathsize="1.19em"><mfenced separators="" open="("><mrow></mrow></mfenced></mstyle><mfrac><mrow>3</mrow>
<mrow>8</mrow></mfrac>s<mrow>2</mrow>+<mfrac><mrow>1</mrow>
<mrow>8</mrow></mfrac>s<mrow>1</mrow>i<mstyle mathsize="1.19em"><mfenced separators="" open=")"><mrow></mrow></mfenced></mstyle>+𝜖<mrow>3</mrow><mstyle mathsize="1.19em"><mfenced separators="" open="("><mrow></mrow></mfenced></mstyle>−<mfrac><mrow>81</mrow>
<mrow>32</mrow></mfrac>s<mrow>4</mrow>s<mrow>2</mrow><mrow>2</mrow>−<mfrac><mrow>27</mrow>
<mrow>16</mrow></mfrac>s<mrow>4</mrow>s<mrow>2</mrow>s<mrow>1</mrow>i+ <mfrac><mrow>9</mrow>
<mrow>32</mrow></mfrac>s<mrow>4</mrow>s<mrow>1</mrow><mrow>2</mrow>+<mfrac><mrow>27</mrow>
<mrow>32</mrow></mfrac>s<mrow>3</mrow>s<mrow>2</mrow><mrow>2</mrow>i−<mfrac><mrow>9</mrow>
<mrow>16</mrow></mfrac>s<mrow>3</mrow>s<mrow>2</mrow>s<mrow>1</mrow>−<mfrac><mrow>3</mrow>
<mrow>32</mrow></mfrac>s<mrow>3</mrow>s<mrow>1</mrow><mrow>2</mrow>i<mstyle mathsize="1.19em"><mfenced separators="" open=")"><mrow></mrow></mfenced></mstyle>+∫<!--nolimits--><!--nolimits--><mrow>
a</mrow><mrow>b</mrow>1−2x+3x<mrow>2</mrow>−4x<mrow>3</mrow><mspace width="0.3em" class="thinspace"></mspace>dx</math>
</math> contains the following errors:
 [ 'MathML - Unexpected text node: \'−2γ𝜖\'' ]
[STATUS]  make4ht: Conversion finished

I use texlive2019, so how to fix all the questions above?

maths.tex file is here

stack.cfg file is as below

\Preamble{xhtml,mathml,fn-in,html5}  
\Css{body{  
    margin:40px auto;  
    max-width:36em;  
    line-height:1.6;  
    font-size:1em; 0.88em;  
    color:\#222;  
    background-color:\#FEFEF7;  
    padding:0 10px;}}  
\Css{h1,h2,h3{line-height:1.2}}  
\Css{p.indent{text-indent:0;}}  
\Css{@media (min-width: 29.63em){  
  :root {  
    font-size: 3vw;  
  }  
}}  

\Css{@media (min-width: 40.74em){  
  :root {  
    font-size: 1.375em;  
  }  
}}  
\Css{body {  
font-family: STIXGeneral, "Linux Libertine O", Gentium, Georgia,  
"Times New Roman",  "Iowan Old Style",  
 Palatino Linotype, Palatino, serif;  
}}  
\begin{document}  
\EndPreamble

and then I use this command

make4ht -uf html5+mathjaxnode -c stack.cfg maths.tex

Answer 1

The main issue is caused by the \parmath command, which is defined in the document text, so it cannot be patched from the configuration file. It looks like this:

\newcommand{\parmath}[2][0.8\linewidth]{\parbox[t]{#1}%
{\raggedright\linespread{1.2}\selectfont\(#2\)}}

The explicit nested math commands seems to explode the MathML code. I would redefine it in the following way:

\newcommand{\parmath}[2][0.8\linewidth]{\parbox[t]{#1}%
{\raggedright\linespread{1.2}\selectfont\ensuremath{#2}}}

It uses \ensuremath instead of \( ... \), which works better in such cases.

I've also found issue with accents that results in error message instead of rendered MathML code. I've fix that in tex4ht sources, but before this fix arrives in the TeX distributions, you can use the updated configuration file:

\Preamble{xhtml,mathml,fn-in,html5}  
\Css{body{  
    margin:40px auto;  
    max-width:36em;  
    line-height:1.6;  
    font-size:1em; 0.88em;  
    color:\#222;  
    background-color:\#FEFEF7;  
    padding:0 10px;}}  
\Css{h1,h2,h3{line-height:1.2}}  
\Css{p.indent{text-indent:0;}}  
\Css{@media (min-width: 29.63em){  
  :root {  
    font-size: 3vw;  
  }  
}}  

\Css{@media (min-width: 40.74em){  
  :root {  
    font-size: 1.375em;  
  }  
}}  


\Css{body {  
font-family: STIXGeneral, "Linux Libertine O", Gentium, Georgia,  
"Times New Roman",  "Iowan Old Style",  
 Palatino Linotype, Palatino, serif;  
}}  
\begin{document}  
\catcode`\:=11

\def\myop#1{\PauseMathClass\HCode{<mo accent="true">}#1\HCode{</mo>}\EndPauseMathClass}
\def\:vec:over{\ifmmode\expandafter\myop\fi{\x:unicode{2192}}}
\def\:grave:over{\ifmmode\expandafter\myop\fi{\x:unicode{0300}}}
\def\:acute:over{\ifmmode\expandafter\myop\fi{\x:unicode{0301}}}
\def\:hat:over{\ifmmode\expandafter\myop\fi{\x:unicode{0302}}}
\def\:widehat:over{\ifmmode\expandafter\myop\fi{\x:unicode{0302}}}
\def\:tilde:over{\ifmmode\expandafter\myop\fi{\x:unicode{0303}}}
\def\:widetilde:over{\ifmmode\expandafter\myop\fi{\x:unicode{0303}}}
\def\:bar:over{\ifmmode\expandafter\myop\fi{\x:unicode{0304}}}
\def\:breve:over{\ifmmode\expandafter\myop\fi{\x:unicode{0306}}}
\def\:dot:over{\ifmmode\expandafter\myop\fi{\x:unicode{0307}}}
\def\:ddot:over{\ifmmode\expandafter\myop\fi{\x:unicode{0308}}}
\def\:uml:over{\ifmmode\expandafter\myop\fi{\x:unicode{0308}}}
\def\:ring:over{\ifmmode\expandafter\myop\fi{\x:unicode{030A}}}
\def\:Huml:over{\ifmmode\expandafter\myop\fi{\x:unicode{030B}}}
\def\:check:over{\ifmmode\expandafter\myop\fi{\x:unicode{030C}}}
\def\:d:under{\ifmmode\expandafter\myop\fi{\x:unicode{0323}}}
\def\:cedil:under{\ifmmode\expandafter\myop\fi{\x:unicode{0327}}}
\def\:b:under{\ifmmode\expandafter\myop\fi{\x:unicode{0331}}}
\def\:udot:over{\ifmmode\expandafter\myop\fi{\x:unicode{0361}}}

\catcode`\:=12
\EndPreamble

This is the rendered problematic part with the fix: