How to Remove Unused Css and Js in WordPress

Scripts Optimization Techniques:
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Eliminate render-blocking resources
Enable text compression
Remove unused CSS
Serve images in next-gen formats
Reduce server response times (TTFB)
Minify JavaScript
Minify CSS

FAQ

Question: What is the difference between Remove unused CSS and Minify CSS

Answer: The difference is that CSS can be consolidated into simpler code and some of it can be condensed and removed, minifying CSS is a trick to do that where instead of it loading via the files it inserts that code into the page that needs the style directly. You can read more about that from something like this (dh)

Question: Whats are the technique to remove unused CSS and Java Script form WordPress website? Are there any plugins for this?

Answer: You can do it by hand via some guides out there, I don’t have any like single guide to do that, but if you are looking to go the plugin route Autoptimize has a CSS optimization option that helps minify CSS scripts. And I do believe Wp-Rocket has that feature, you can use it, but if you just want to minify CSS, autoptimize is a bit lighter

Tutorial

Subject	Link
9 Ways to Remove Unused CSS & JS in WordPress 2021	youtube.com/watch?v=Z7qIUiyBVNA
How to Remove Unused CSS in WordPress (The Right Way)	wpbeginner.com/wp-tutorials/how-to-remove-unused-css-in-wordpress-the-right-way/
Minification of CSS files	geeksforgeeks.org/minification-of-css-files
W3 Total Cache Plugin (Reduce CSS JS)	youtube.com/watch?v=bATqMYUwcfU
W3 Total Cache Plugin full configuration	youtube.com/watch?v=9f36Xn5lEFg

How to Remove Unused Css and Js in WordPress