How to add source code comments in Thymeleaf templates that don't get included in generated HTML?

Question

I am using full stack Thymeleaf (spring mvc, security, layout dialect, webflow) in a mid-size web application.

Ok..now that we put so much of code in the html templates

Answer 1

With Thymeleaf 3.0, the currently working version was

   this comment will be removed by thymeleaf on the template processing

Other answers, for earlier thymeleaf versions, did not work by me. The current thymeleaf documentation is here.