Playing with method() Method

method.js

if (typeof Function.prototype.method !== 'function') {
  Function.prototype.method = function(name, implementation) {
    this.prototype[name] = implementation;
    return this;
  };
}

var Person = function() {
  this.name = name;
};

Person.method("getName", function() {
  return this.name;
});

Person.method("setName", function(name) {
  this.name = name;
  return this;
});

var person = new Person();
console.log(person.setName('Bart Simpson').getName());