Gdddk

documentclassbeamer
usethemeMadrid
begindocument
beginframe
aaa
endframe
beginframe
bbb
endframe
enddocument

The above tex file is to be converted into html. I am using the following command

make4ht filename.tex

However it throws error. The basic question is "Is it possible to convert beamer presentation to html using make4ht?"

There is some support for Beamer in tex4ht, but it seems to be a little bit old - it is dated to 2003. It seems that it doesn't really work anymore, as Beamer changed substantially since that time. For example, it seems to support a slide environment instead of frame.

So it seems that we can just discard the current Beamer support and create a new one. Before it is added to the tex4ht sources, you can use the following beamer.4ht file:

letHy@EveryPageAnchorrelax
defpgf@trimright@final0pt
defpgf@trimleft@final0pt
letorigEndPEndP
AtBeginDocumentdefEndPletEndPorigEndPSaveEndP
endinput

It just fixes basic issues - spurious elements inserted for every page, some missing PGF commands and issues with paragraphs. This version will create just a plain document, without frames. If we want to keep the frames, we can configure them in a .cfg file:

Preamblexhtml
 ConfigureEnvbeamer@frameslide
 ifvmodeIgnoreParfiEndP
 HCode<section class="slide">RecallEndPparShowPar
 
 ifvmodeIgnoreParfiEndP HCode</section>
 
 Csssection.slide border:solid black 0.4pt;margin-bottom:1em;
begindocument
EndPreamble

This will insert <section class="slide"> element for every frame.

Result:

<section class="slide">


 <ul class="itemize1">
 <li class="itemize">
 first
 </li>
 <li class="itemize">
 second</li></ul>
<!--l. 16--><p class="noindent" >aaa


</p>
</section>


<section class="slide">


<!--l. 19--><p class="noindent" >bbb


</p>
</section>