Great!

I've added this code as a new domfilter to make4ht. It is also used in the `common_domfilters` extension. So with the soon to be released make4ht version, you will just need to use

make4ht -f html5+common_domfilters filename.tex

This extension also fixes other issues, so it is usually a good idea to use it.

It seems that booktabs commands only add CSS declarations for the rows with borders. I've updated the build file to check also the CSS, so it should be OK. Here is a new version.

I will definitely made filter from this code, I will also include it to `common_domfilters` extension.

(file #326)

Thank you Michal, this fixes the trailing row problem for me. Is this expected to be added to tex4ht (or make4ht) in a future release?

Alex

The attached file ht-tabular.tex produces (with make4ht and format html5) an HTML file with a spurious trailing row at the end of the table. The W3C validator complains "A table row was 1 columns wide, which is less than the column count established using column markup".

In this example you might say that one should remove the last "\\" from the tabular environment, but when using "booktabs" package with "\toprule" and "\bottomrule", the last cr is required to draw the rule.