What does the '#' sign mean in JavaScript?

Question

I\'m new to Javascript and I\'m try to understand some code. I don\'t understand and I can\'t find any documentation about the # sign.

$(function ()         


        

Answer 1

That isn't vanilla Javascript! That's jQuery!

In jQuery you can select elements via CSS style selectors. In this case, #x is a CSS selector to select all elements with the id x.