Can a line of code contain JS, CSS, and HTML tags?¿?

Question

Web

Answer 1

I suppose it can if you consider this as valid:
https://code.sololearn.com/W2yir860TcMJ/?ref=app

Answer 2

Sure it can, we only separate it into different lines and files for readability and for maintaining the code.

Here's an example:
https://code.sololearn.com/WzUvo71wBO3G/#html