![tex4ht 在 mathjax 模式下遇到 $\frac{\partial u}{\partial x}=0$ 问题](https://linux22.com/image/442848/tex4ht%20%E5%9C%A8%20mathjax%20%E6%A8%A1%E5%BC%8F%E4%B8%8B%E9%81%87%E5%88%B0%20%24%5Cfrac%7B%5Cpartial%20u%7D%7B%5Cpartial%20x%7D%3D0%24%20%E9%97%AE%E9%A2%98.png)
由于某种原因,在最近更新 texlive 之后,mathjax 模式下的 tex4ht 不再为此生成有效的数学运算
\documentclass[12pt]{article}
\usepackage{amsmath}
\begin{document}
\[
\frac{\partial u}{\partial x}=0
\]
\end{document}
使用编译
make4ht -ulm default -a debug foo.tex "mathjax,htm"
给予
但lualatex foo.tex
给出了正确的输出
生成的 HTML 是
<!DOCTYPE html>
<html lang='en-US' xml:lang='en-US'>
<head><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='foo.css' rel='stylesheet' type='text/css' />
<meta content='foo.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. 9 --><p class='noindent'>\[ \frac {
tial u}{
tial x}=0 \]
</p>
</body>
</html>
发生了什么?为什么 tex4ht 不再生成正确的数学运算?这仅在使用 mathjax 模式时发生。当不使用 mathjax 模式时,输出是正确的。
TL 2021 大约两周前在 Linux 上更新。
附言:问题已添加至 tex4ht
答案1
感谢您的报告。此问题是由之前对 MathJax 处理的更改引起的。问题是 MathMode 中的段落产生了 \par 命令而不是空行。我使用正则表达式修复了这个问题,但问题是它将 \partial 替换为两个空行和字符串“tial”。我更新了正则表达式,因此它要求在 \par 后留一些空格,这似乎解决了这个问题。
以下是更新版本mathjax-latex-4ht.4ht
:
% mathjax-latex-4ht.sty (2021-12-02-10:19), generated from tex4ht-mathjax.tex
% Copyright 2018-2021 TeX Users Group
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either
% version 1.3c of this license or (at your option) any
% later version. The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions
% of LaTeX version 2005/12/01 or later.
%
% This work has the LPPL maintenance status "maintained".
%
% The Current Maintainer of this work
% is the TeX4ht Project <http://tug.org/tex4ht>.
%
% If you modify this program, changing the
% version identification would be appreciated.
\immediate\write-1{version 2021-12-02-10:19}
\ExplSyntaxOn
\cs_new_protected:Npn \alteqtoks #1
{
\tl_set:Nx \l_tmpa_tl {\detokenize{#1}}
% % replace < > and & with xml entities
\regex_replace_all:nnN { \x{26} } { & } \l_tmpa_tl
\regex_replace_all:nnN { \x{3C} } { < } \l_tmpa_tl
\regex_replace_all:nnN { \x{3E} } { > } \l_tmpa_tl
% replace \par command with blank lines
\regex_replace_all:nnN { \x{5C}par\b } {\x{A}\x{A}} \l_tmpa_tl
\tl_set:Nx \l_tmpb_tl{ \l_tmpa_tl }
\HCode{\l_tmpb_tl}
}
\ExplSyntaxOff
\NewConfigure{MathJaxConfig}{1}
\long\def\AltlMath#1\){\expandafter\alteqtoks{\(#1\)}\)}
\long\def\AltlDisplay#1\]{\alteqtoks{\[#1\]}\]}
\long\def\AltMathOne#1${\alteqtoks{\(#1\)}$}
% this seems a bit hacky -- we need to skip some code inserted at the
% beginning of each display math
\long\def\AltlDisplayDollars\fi#1$${\alteqtoks{\[#1\]}$$}
\newcommand\VerbMathToks[2]{%
\alteqtoks{\begin{#2}
#1
\end{#2}}%
}
\ExplSyntaxOn
\newcommand\VerbMath[1]{%
\cs_if_exist:cTF{#1}{
\RenewDocumentEnvironment{#1}{+!b}{%
\NoFonts\expandafter\VerbMathToks\expandafter{##1}{#1}\EndNoFonts%
}{}
}{}%
}
\ExplSyntaxOff
\def\fixmathjaxtoc#1{\Configure{writetoc}{\def#1{\detokenize{#1}}}}
\def\fixmathjaxsec#1{\def#1{\detokenize{#1}}}
\AtBeginDocument{%
\VerbMath{subarray}
\VerbMath{smallmatrix}
\VerbMath{matrix}
\VerbMath{pmatrix}
\VerbMath{bmatrix}
\VerbMath{Bmatrix}
\VerbMath{vmatrix}
\VerbMath{Vmatrix}
\VerbMath{cases}
\VerbMath{subequations}
\VerbMath{aligned}
\VerbMath{alignedat}
\VerbMath{gathered}
\VerbMath{gather}
\VerbMath{gather*}
\VerbMath{alignat}
\VerbMath{alignat*}
\VerbMath{xalignat}
\VerbMath{xalignat*}
\VerbMath{xxalignat}
\VerbMath{align}
\VerbMath{align*}
\VerbMath{flalign}
\VerbMath{flalign*}
\VerbMath{split}
\VerbMath{multline}
\VerbMath{multline*}
\VerbMath{equation}
\VerbMath{equation*}
\VerbMath{math}
\VerbMath{displaymath}
\VerbMath{eqnarray}
\VerbMath{eqnarray*}
\ConfigureEnv{gather}{}{}{}{}
\ConfigureEnv{gather*}{}{}{}{}
\ConfigureEnv{multline}{}{}{}{}
\ConfigureEnv{multline*}{}{}{}{}
\fixmathjaxsec\left
\fixmathjaxsec\right
\fixmathjaxtoc\int
\fixmathjaxtoc\,
\fixmathjaxtoc\sin
\fixmathjaxtoc\cos
\fixmathjaxtoc\tan
\fixmathjaxtoc\arcsin
\fixmathjaxtoc\arccos
\fixmathjaxtoc\arctan
\fixmathjaxtoc\csc
\fixmathjaxtoc\sec
\fixmathjaxtoc\cot
\fixmathjaxtoc\sinh
\fixmathjaxtoc\cosh
\fixmathjaxtoc\tanh
\fixmathjaxtoc\coth
\fixmathjaxtoc\log
\fixmathjaxtoc\ln
\fixmathjaxtoc\sum
\fixmathjaxtoc\(
\fixmathjaxtoc\)
\fixmathjaxtoc\begin
\fixmathjaxtoc\end
\fixmathjaxtoc\\
\fixmathjaxtoc\exp
}
\endinput
重要的变化是这样的:
\regex_replace_all:nnN { \x{5C}par\b } {\x{A}\x{A}} \l_tmpa_tl
现在它测试 之后的空格\par
。
生成的 HTML: