Init function in javascript and how it works

Question

I often see the following code:

(function () {
  // init part
})();

but I never could get my head around how it works. I find the last brac

Answer 1

The code creates an anonymous function, and then immediately runs it. Similar to:

var temp = function() {
  // init part
}
temp();

The purpose of this construction is to create a scope for the code inside the function. You can declare varaibles and functions inside the scope, and those will be local to that scope. That way they don't clutter up the global scope, which minimizes the risk for conflicts with other scripts.