How to work with the site after HTML/CSS/JS optimization?

Question

HTML

How do you work on the site after optimizing html/css/js. By optimization I mean removing spaces, line breaks and other garbage.
With css/js it is even more or less clear - to have 2 files, normal and optimized, which will already be on the site.
But with HTML? If it is already cut and stretched on cms? Well, you’ll break your leg, edit something ...
Is there any software that simplifies all these processes? Interested in MacOS.

Answer 1

Well, in general, HTML should be normal, and CMS should compress HTML and display normal pages.

Answer 2

Is it so difficult?
Hundreds of these tools. The first one in the request.
Use Internet search engines, please.

Answer 3

Plus I would suggest learning SCSS.

Answer 4

No need to optimize core js/css files.
The script or service creates new files scripts.min.js, styles.min.css, they are included in the battle. The working code connects the original files, when deploying, the files are automatically combined and compressed.