In his post The anatomy of an immediately-invoked function expression, my friend Chris Ferdinandi shows you how he writes an IIFE from scratch. Here's another way to approach it.
I start with a leading semicolon, two sets of parentheses, and a closing semicolon.
;()();Then, I take my anonymous function:
function () {
}And drop it into the first set of parentheses:
;(function () {
})();Boom. You're good to go!
I also opt into strict mode to make my IIFE more bulletproof:
;(function () {
"use strict";
// Your code goes here...
})();If you want to learn more, I recommend the following in addition to Chris' resources: