Callback function - use of parentheses

Question

I\'m new to jQuery and am bit confused about the use (or not) of parentheses with a callback function. Say I have a function:

function cb() {
 // do somethin         


        

Answer 1

Is it to do with when the cb function is executed?

Essentially, yes, though the difference does run a little deeper than that.

• cb is a reference of sorts to the function. You're passing the function along as a parameter to be invoked somewhere down the line.

• cb() is a function call; the function will be invoked, and the result passed as an argument to .hide.