Tue Dec 27 02:37:27 2022, original submission:
reference and screen shots at
https://tex.stackexchange.com/questions/669770/problem-2-after-updating-to-latest-tl-2022-tex4ht-no-longer-shows-table-of-con
I found that a problem in math generated after updated to latest TL. All math in chapter or section titles is messed up now. This used to show up OK before I updated to TL.
The math which is not in section or chapter title still shows OK. But why?
Here is a MWE
--------------------
\documentclass[12pt]{book}%
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{hyperref}
\begin{document}
\frontmatter
\title{my book title}
\author{me}
\date{\today}
\maketitle
\ifdefined\HCode
\Configure{tableofcontents*}{chapter}
\TocAt{chapter,section}
\TocAt{section,subsection}
\TocAt{subsection,subsubsection}
\TocAt{subsubsection,paragraph}
\fi
\tableofcontents
\mainmatter
\chapter{First order ode $F\left( x,y,y^{\prime}\right) =0$}%
The equation is $F\left( x,y,y^{\prime}\right) =0$
\section{First order linear in derivative $F\left( x,y,y^{\prime}\right)=0$}%
These are first order ode's which are linear in $y^{\prime}$.
\subsection{Quadrature ode $y^{\prime}=f\left( x\right) $}
data
\subsubsection{Introduction}
data
\end{document}
-----------------------------
Compiled using
make4ht -ulm default -a debug index.tex 'mathjax,htm'
This is the HTML (see screen shot)
Notice all those \o stuff. Before updated TL this all worked OK and the math showed up OK in section and chapter titles. So something changed.
This is the raw HTML
-----------------
<!DOCTYPE html>
<html lang='en-US' xml:lang='en-US'>
<head><title>my book title</title>
<meta charset='utf-8' />
<meta content='TeX4ht (https://tug.org/tex4ht/)' name='generator' />
<meta content='width=device-width,initial-scale=1' name='viewport' />
<link href='index.css' rel='stylesheet' type='text/css' />
<meta content='index.tex' name='src' />
<script>window.MathJax = { tex: { tags: "ams", }, }; </script>
<script async='async' id='MathJax-script' src='https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml-full.js' type='text/javascript'></script>
</head><body>
<!-- l. 10 --><p class='indent'>
</p>
<div class='maketitle'>
<h2 class='titleHead'>my book title</h2>
<div class='author'><span class='ec-lmr-12x-x-120'>me</span></div><br />
<div class='date'><span class='ec-lmr-12x-x-120'>December 26, 2022</span></div>
</div>
<h2 class='likechapterHead' id='contents'><a id='x1-1000'></a>Contents</h2>
<div class='tableofcontents'>
<span class='chapterToc'>1 <a href='#first-order-ode-fleft-xyy-right-' id='QQ2-1-2'>First order ode \(F\o:left: ( x,y,y^{\prime }\o:right: ) =0\)</a></span>
</div>
<!-- l. 27 --><p class='indent'>
</p>
<h2 class='chapterHead' id='first-order-ode-fleft-xyy-right-'><span class='titlemark'>Chapter 1</span><br /><a id='x1-20001'></a>First order ode \(F\left ( x,y,y^{\prime }\right ) =0\)</h2>
<div class='chapterTOCS'>
<span class='sectionToc'>1.1 <a href='#first-order-linear-in-derivative-fleft-xyy-right-' id='QQ2-1-3'>First order linear in derivative \(F\o:left: ( x,y,y^{\prime }\o:right: )=0\)</a></span>
</div>
<!-- l. 29 --><p class='indent'> The equation is \(F\left ( x,y,y^{\prime }\right ) =0\)
</p>
<h3 class='sectionHead' id='first-order-linear-in-derivative-fleft-xyy-right-'><span class='titlemark'>1.1 </span> <a id='x1-30001.1'></a>First order linear in derivative \(F\left ( x,y,y^{\prime }\right )=0\)</h3>
<div class='sectionTOCS'>
<span class='subsectionToc'>1.1.1 <a href='#quadrature-ode-y-fleft-xright-' id='QQ2-1-4'>Quadrature ode \(y^{\prime }=f\o:left: ( x\o:right: ) \)</a></span>
</div>
<!-- l. 32 --><p class='indent'> These are first order ode’s which are linear in \(y^{\prime }\).
</p>
<h4 class='subsectionHead' id='quadrature-ode-y-fleft-xright-'><span class='titlemark'>1.1.1 </span> <a id='x1-40001.1.1'></a>Quadrature ode \(y^{\prime }=f\left ( x\right ) \)</h4>
<div class='subsectionTOCS'>
<span class='subsubsectionToc'><a href='#introduction' id='QQ2-1-5'>Introduction</a></span>
</div>
<!-- l. 34 --><p class='indent'> data
</p>
<h5 class='subsubsectionHead' id='introduction'><a id='x1-5000'></a>Introduction</h5>
<div class='subsubsectionTOCS'>
</div>
<!-- l. 36 --><p class='indent'> data
</p>
</body>
</html>
-----------------------------------
Using
>which tex4ht
/usr/local/texlive/2022/bin/x86_64-linux/tex4ht
>make4ht --version
make4ht version v0.3l
| 
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