6-singleton.js

/**
 * Create an example of a JavaScript Singleton.
 * After the first object is created, it will return additional 
 * references to itself
 */

let obj = (function () {
    let objInstance; //private variable
    function create() { //private function to create methods and properties

    }
    return {

    };
})();

//let obj1 = obj.getInstance();
// let obj2 = obj.getInstance();