How to add CSS and HTML editor in my custom website?

Question

I have a website and already have the admin panel to post, add previlege, etc. And my website is not using any CMS.

The problem is I want to edit my HTML and CSS (like wordpress do) directly from admin area.

Can Javascript / PHP do this?

Please don't suggest another 3rd party to do this. Thank you very much.

Answer 1

That depends on how much customization you want.. If you want to just stylize your posts(typography)

Visit the link mentioned below. https://ckeditor.com/ckeditor-5/

Or if you want to change the whole HTML design layouts, then you'll have to store designs in db, raw html and your css should have styles for them as well.