JAVASCRIPT

iife javascript

var result = (function () {
    var name = "Barry"; 
    return name; 
})(); 
// Immediately creates the output: 
result; // "Barry"

iife in javascript

//expression that are immediately invoked and executed as soon as defined.
//this aviod global scope pollution.
//syntax
(function(a,b){         
     return a + b; 
})(10,20);
//You can also use an arrow function in defining an IIFE:
(() => {     
    //... 
})();

js iife

(function () {
    // code goes here
})();