Question

What is the best way wrap some code so I can call it with foo(); and have it execute when the javascript is loaded ?

I want to have foo executed whenever the javascript is loaded and have the ability to call foo with foo();

Answer 1

You can wrap the function assignment in a function wrapper and pass parameters to it.

(test = function(a) {
    return a + 7;
})(6); // returns 13

test(2); // returns 9

demo using console.log