Minifying css classes and ids

Question

I want to find some way of automatically minifying classes and ids in a .html-file. The file is created through a series of gulp commands. I've tried the command line application Munch, but it ruins the file since it removes doctype and important comments that I have. Does anyone have any tip on how to do this? The best option would of course be something like this:

.pipe(minifyClassesAndIds({ignoreclasses: ['.this', '.that']})

I hope you understand what I mean.

Answer 1

The only working tool I know is a HTML Muncher .
But, unfortunately now it doesn't work very well and have much of issues.

UPD. Don't sure about which munch you are talking about, is it the same as HTML Muncher?