这可能是 tex4ht 中已知的限制，我不知道。但下面的 MWE 给出了错误
! Package amsmath Error: \tag not allowed here.
仅在使用 运行时make4ht。lualatex 和 pdflatex 均无错误。
\documentclass[11pt]{article}
\usepackage{amsmath}
\begin{document}
\[
x=y \tag{1}
\]
\end{document}
输出为
>make4ht foo.tex
.....
LaTeX2e <2017/01/01> patch level 3
Babel <3.9r> and hyphenation patterns for 83 language(s) loaded.
(./foo.tex (/usr/local/texlive/2016/texmf-dist/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/usr/local/texlive/2016/texmf-dist/tex/latex/base/size11.clo))
....
(/usr/local/texlive/2016/texmf-dist/tex/generic/tex4ht/html4.4ht)
(/usr/local/texlive/2016/texmf-dist/tex/generic/tex4ht/html4-math.4ht))
(/usr/local/texlive/2016/texmf-dist/tex/generic/tex4ht/html4.4ht)
(/usr/local/texlive/2016/texmf-dist/tex/generic/tex4ht/html4-math.4ht))
(./foo.aux)
! Package amsmath Error: \tag not allowed here.
See the amsmath package documentation for explanation.
Type H <return> for immediate help.
...
l.7 x=y \tag
{1}
?
列出文件
*File List*
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size11.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
amsmath.sty 2016/11/05 v2.16a AMS math features
amstext.sty 2000/06/29 v2.01 AMS text
amsgen.sty 1999/11/30 v2.0 generic functions
amsbsy.sty 1999/11/29 v1.2d Bold Symbols
amsopn.sty 2016/03/08 v2.02 operator names
版本
which make4ht
/usr/local/texlive/2016/texmf-dist/scripts/make4ht/make4ht
上述已知问题是否与 make4ht 有关？我应该如何解决这个问题？我需要更改\[..\]为\begin{align}....\end{align}使用\tag{}tex4ht 吗？make4ht 没有错误。只有在使用带有标签时才会出错\[..\]
答案1
Amsmath 重新定义了\[并\]生成了\begin{equation*}resp. \end{equation*}。tex4ht将其重新定义为不同的东西，因此\tag在这里不再起作用。您可以amsmath自己尝试定义：
\Preamble{xhtml}
\DeclareRobustCommand{\[}{\begin{equation*}}
\DeclareRobustCommand{\]}{\end{equation*}}
\begin{document}
\EndPreamble
结果如下：
