JAVASCRIPT

Variables In Self Invoking Function

let/var declared inside of a self invoking function go away outside of it. consts remain. So if you want it to disappear, use var/let. If you want it to stay, const or nothing

Variable As Parameter In Self Invoking Function

var x = "AAAAAAA333AA";
(function (a) {
console.log(a);
}(x));
 /*x must be already defined at the time*/