example
Date: 2001-02-28 17:02:00

A source file:

    \documentclass{book}
       \newenvironment{mylist} {\trivlist}{\endtrivlist}
       \usepackage[mycfg]{tex4ht}
    \begin{document}

    \begin{mylist}  \item   First item
                    \item   Second item
    \end{mylist}

    \end{document}

and a possible configuration file ‘mycfg.cfg’ for the source file:

    \Preamble{html}
      \ConfigureList{mylist}
        {\HCode{<div class="mylist">}} {\HCode{</div>}} {* }{}
      \Css{.mylist { color : red; }}
         % see cascade style sheets for
         % the meaning of \Css

    \begin{document}

      \HCode{<!--created by me-->}
    \EndPreamble