\Preamble{xhtml}
\renewcommand\listofflowcharts{%
\chapter*{\listoflocname}%
\TableOfContents[loc]%
}
\ConfigureToc{loc}{\HCode{<span class="lofToc">}}{\ }{}{\HCode{</span><br />}}
\begin{document}
\Configure{DocumentLanguage}{en}
\Configure{OpfScheme}{URI}
\Configure{UniqueIdentifier}{https://the-bread-code.io}
\Configure{AddCss}{book-ebook.css}
\Configure{CoverMimeType}{image/jpeg}
\CoverMetadata{cover/cover-page.jpg}
\AddToHook{env/tikzpicture/begin}{\fontfamily{opensans-TLF}\selectfont}
\Configure{@HEAD}{\HCode{
<style type="text/css">
  @import url('https://fonts.cdnfonts.com/css/open-sans');
  body{
    font-family: 'Open Sans';
  }
</style>}}

% Deal with chemical equations in a single svg
\ExplSyntaxOn
\def\standaloneenv#1{}
\pend:def\schemestart{\Picture+{}}
\append:def\CF_schemestop{\EndPicture}
\ExplSyntaxOff
\makeatletter
\def\texfourht@tikz@begin{
  \protect\csname nested:math\endcsname% support display math
  \Picture+[\csname a:Picture-alt\endcsname]{}%
}
\makeatother

% Warnig from Michal: Note that once you get the updated TeX Live with a new
% `chemfig.4ht` file, you can remove this from the config file:
%
%```latex \pend:def\schemestart{\Picture+{}}
%\append:def\CF_schemestop{\EndPicture} ```
%
%You could get an error otherwise, as there would be nested `\Picture+{}` and
%`\EndPicture` commands.

\EndPreamble