JavaScript Learning #4 - Using the 'prototype' keyword

A big advantage of using objects is the ability to re-use already-written code in a new context. JavaScript supports extending and inheriting objects via the prototypekeyword

Example:


function Person(personName){
this.name = personName;
this.info = "This person is called " + this.name;
this.showInfo = function(){
console.log(this.info);
};
}

Person.prototype.sayHello = function(){
console.log(this.name + " says Hello");
};

var name = prompt("Who are you?");
person1 = new Person(name);

person1.showInfo();
person1.sayHello();


Output:

This person is called kkondal
kkondal says Hello