Javascript Object Prototype Clone

Object.prototype.clone = function() {
    let objClone = new Object();
    for (let key in this) 
       objClone[key] = this[key];  /*from   ww w . ja  v  a 2  s . co m*/
    return objClone;  
}

// Lets create an object with a few properties
let myOldObject = { name: "Jimmy", sayHi: function() { console.log("Hi, I'm " + this.name);}};

let myClone = document.body.clone();

myOldObject.name = "Alex";


console.log(myClone.name );