[tex4ht] [bug #589] tex4ht no longer shows table of content when using split level

Tue Dec 27 03:37:27 CET 2022

URL:
  <http://puszcza.gnu.org.ua/bugs/?589>

                 Summary:  tex4ht no longer shows table of content when using
split level
                 Project: tex4ht
            Submitted by: nma123
            Submitted on: Tue Dec 27 02:37:27 2022
                Category: None
                Priority: 5 - Normal
                Severity: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

    _______________________________________________________

Details:

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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