Best html/css/js/php code editor to embed on a website?

Question

WYSIWYG

Good day friends!
I'm looking for the best code editor to embed in a web page.
The main criterion is the convenience and sophistication of the editor. The point is that the programmer can fully work in such an editor, and not spit after five minutes of work.
The editor must be completely independent of third-party servers. That is to connect locally. Solutions like "Codepen embeddable via iframe" are not suitable.
The code will be mostly web-based, i.e. html/css/js/php + some specific extensions like sass, json, etc.
It is desirable that the editor be distributed under a license that allows it to be used for commercial purposes.
Are there such editors in nature?
Thanks in advance to everyone who contributes to the issue!

Answer 1

I can recommend a good solution based on VS Code.
https://microsoft.github.io/monaco-editor/ , available in npm, as well as wrappers for various frameworks.
Example under React https://github.com/react-monaco-editor/react-monac...