javascript-001-prototypes-intro

javascript-001-prototypes-intro.md

• Until ECMA6, JavaScript had no classes. It had (and still has) prototypes.
• A class is like a mold from which you build an object. A prototype is itself an object.

// think of this as the class AND its constructor
var Person = function() {
  this.canTalk = true;
};

// this is a 'class method'
Person.prototype.greet = function() {
  if (this.canTalk) {
    console.log('Hi, I am ' + this.name);
  }
};

// instantiating
var person = new Person();

Further reading

1. Mozilla reference - prototypes
2. Mozilla reference - classes