Html, Css and PHP with JS or withou JS?

Question

I am thinking something, Is it ok to develop without a JavaScript? HTML, CSS and PHP only?
I mean develop a system without Javascript?

Answer 1

https://code.sololearn.com/wbNxr4RWHo3u/?ref=app

Answer 2

yes sure...
https://code.sololearn.com/WvG83FaGkn3g/?ref=app
without js :) ;) only alert :)