Please help : JS/HTML/CSS

Question

Is it necessary to learn HTML and CSS beside Javascript ?

Answer 1

If your purpose is to output html/css content, yes you should... but that's not necessarly the first goal, and it's not compulsory. You could also learn very basic feature of html/css to do minimal formated in/output, output (log) in the browser web console, or in/output with help of dialog boxes (alert, prompt, confirm)...