since html 5 and css 3 are a thing do i really have to learn

You don't have to learn anything. Be useless for as long as you want

yes , for interaction purposes

but don't add to much javascript or else your site looks to shitty

and knowing javascipt will look good

>>57031181

No, you can just learn Nim instead, which compiles to, amongst other things, JavaScript.

http://nim-lang.org/

Yes.
Whenever possible you should be rendering the web page on the client side using Javascript.

It's also convenient for things like hamburger menus and accordeons

File: hide.png (1KB, 71x62px) Image search: [Google]

1KB, 71x62px

>>57031232

>>57031181
It depends. Are you just serving a static web page, or are you going to want to pull updates without explicit reloads? Do you need any kind of complex interactivity? If so, you need javascript. I would recommend against using jQuery or any unnecessary libraries if possible though, unless you're making a web app that's somewhat complex.

>>57031466
>Whenever possible you should be rendering the web page on the client side using Javascript.
Why?

Websites cannot run without javascript

>>57033449
Suuure.