Temporarily Overwrite Instance Method

Temporarily overwrite instance method

We can overwrite the prototype method with our custom greet method.

When we are done, we can delete the instance's method so that the prototype methods get used instead.

var User = function(name){
    this.name = name;
User.prototype.greet = function(){

var pepe = new User('Pepe');
pepe.greet(); //Pepe
pepe.greet = function(){console.log(this.name, 'Rone')}.bind(pepe);
pepe.greet(); //Pepe Rone
delete pepe.greet;
pepe.greet(); //Pepe