这是在以下位置应用代码后的另一个问题https://tex.stackexchange.com/a/623536/
梅威瑟：
\documentclass{amsart}
\usepackage{hyperref}
\usepackage{cleveref}
\newtheorem{theorem}{Theorem}
\begin{document}
Look at our \hyperref[thm]{main theorem}.
\begin{theorem}\label{thm}
Something
\end{theorem}
Our main theorem is \Cref{thm}.
\end{document}
用 编译后make4ht，我得到一个html包含 的Our main theorem is <a href='#x1-2r1'>Theorem <a href='#theorem.1'>1</a></a>，但没有#theorem.1（而且这个嵌套的href似乎不是有效的 html 代码？）。有趣的是，如果没有\hyperref[thm]{main theorem}，那么这样的html代码就不会出现。
我想知道原因和解决方法。
更新：我把上面的代码修改如下：
\documentclass{amsart}
\usepackage{hyperref}
\usepackage{cleveref}
\newtheorem{theorem}{Theorem}
\begin{document}
Look at our \hyperref[thm]{main theorem}.
Look at our Theorem~\ref{thm}.
\begin{theorem}\label{thm}
Something
\end{theorem}
Our main theorem is \Cref{thm}.
Our main theorem is \Cref{thm}.
\end{document}
有趣的是，只有第三个输出有\Cref{thm}问题：
<!-- l. 17 --><p class='indent'> Our main theorem is <a href='#x1-2r1'>Theorem <a href='#theorem.1'>1</a></a>.
</p><!-- l. 19 --><p class='indent'> Our main theorem is <a href='#x1-2r1'>Theorem 1</a>.
</p>
答案1
看起来 Cleveref 在内部使用 Hyperref 来放置指向定理的链接，但这个目标并不存在。我们可以更改 Cleveref 的宏以不这样做，因为我们自己处理超链接。尝试以下版本cleveref.4ht：
% cleveref.4ht (2021-06-30-14:33), generated from tex4ht-4ht.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 2021-06-30-14:33}
% orig:refstepcounter is saved in cleveref-hooks.4ht
\let\cref@old@refstepcounter\orig:refstepcounter%
\def\refstepcounter{%
\@ifnextchar[{\refstepcounter@optarg}{\refstepcounter@noarg}%]
}%
% fix for TeX4ht label mechanism
\def\cref:currentlabel#1{\let\cnt:currentlabel\@currentlabel
\def\:@currentlabel{\ifx \cnt:currentlabel\@currentlabel
\expandafter\the\csname c@#1\endcsname\else \@currentlabel\fi}%
%
\anc:lbl r{#1}%
}
\def\refstepcounter@noarg#1{%
\cref@old@refstepcounter{#1}%
\cref@constructprefix{#1}{\cref@result}%
\@ifundefined{cref@#1@alias}%
{\def\@tempa{#1}}%
{\def\@tempa{\csname cref@#1@alias\endcsname}}%
\protected@xdef\cref@currentlabel{%
[\@tempa][\arabic{#1}][\cref@result]%
\csname p@#1\endcsname\csname the#1\endcsname}
\cref:currentlabel{#1}%
}%
\def\refstepcounter@optarg[#1]#2{%
\cref@old@refstepcounter{#2}%
\cref@constructprefix{#2}{\cref@result}%
\@ifundefined{cref@#1@alias}%
{\def\@tempa{#1}}%
{\def\@tempa{\csname cref@#1@alias\endcsname}}%
\protected@xdef\cref@currentlabel{%
[\@tempa][\arabic{#2}][\cref@result]%
\csname p@#2\endcsname\csname the#2\endcsname}
\cref:currentlabel{#2}%
}%
\ifdefined\@firstoffive\else%
\def\@firstoffive#1#2#3#4#5{#1}
\fi
\def\:tempa#1#2{\bgroup%
\def\rEfLiNK##1##2{\Link{##1}{}}%
\expandafter\expandafter\expandafter\@firstoffive\csname r@#2\endcsname{}{}{}{}{}%
\cref@getlabel{#2}{\@templabel}%
#1{\@templabel}{}{}%
%\o:@@@setcref:{#1}{#2}%
\EndLink\egroup%
}%
\HLet\@@@setcref=\:tempa
\@ifpackageloaded{amsthm}{
\let\cref@thmnoarg\@thm%
\def\@thm{\@ifnextchar[{\cref@thmoptarg}{\cref@thmnoarg}}%]
\def\:tempb[#1]#2#3#4{%
% call original amsthm theorem definition, but
% disable \:thm in order to prevent infinite loop
\let\:thm\:gobble
\cref@thmnoarg{#2}%
\o:cref@thmoptarg:[#1]{#2}{#3}{#4}
}%
\HLet\cref@thmoptarg\:tempb
}{}%
\Hinput{cleveref}
\endinput
重要的部分是这样的：
\def\:tempa#1#2{\bgroup%
\def\rEfLiNK##1##2{\Link{##1}{}}%
\expandafter\expandafter\expandafter\@firstoffive\csname r@#2\endcsname{}{}{}{}{}%
\cref@getlabel{#2}{\@templabel}%
#1{\@templabel}{}{}%
%\o:@@@setcref:{#1}{#2}%
\EndLink\egroup%
}%
\HLet\@@@setcref=\:tempa
它重新定义了\@@@setcref宏，插入引用文本和数字，并插入 TeX4ht 的链接。使用 Hyperref 的代码已被删除。
结果如下：
<div class='newtheorem'>
<!-- l. 13 --><p class='noindent'><span class='head'>
<a id='x1-2r1'></a>
<span class='cmbx-10'>Theorem 1.</span> </span> <span class='cmti-10'>Something</span>
</p>
</div>
<!-- l. 15 --><p class='indent'>
</p><!-- l. 17 --><p class='indent'> Our main theorem is <a href='#x1-2r1'>Theorem 1</a>.
</p><!-- l. 19 --><p class='indent'> Our main theorem is <a href='#x1-2r1'>Theorem 1</a>.
</p>