Table of Contents Overview Constructor get set Prototype Instance Multiple inheritance Constructor Prototype Instance

List:

• constructors are factories for objets
• they take individual characteristics (usually, properties) as parameters to create the object
• they also give each object access to common properties (kind of Java class properties) or operations (kind of Java class methods) stored in prototype
• can you create a prototype before the constructor ?

More:

• Multiple inheritance

Get it with dog.constructor.name

const Dog = function(name){
    this.name = name;
};

Dog.prototype.species = 'Canine';
Dog.prototype.bark = function(){ return("woof!"); };

const dog = new Dog('Fluffy');

// Supply 
// * parameters for inherited type
// * parameters for current type
const ShowDog = function (name, breed){
	this.name = name;
	this.breed = breed;
};

// No arguments to constructor kin of copy all from Dog)
ShowDog.prototype = new Dog;

// We handled the construction above in ShowDog
ShowDog.prototype.constructor = ShowDog;

// Prototype (properties and methods)
ShowDog.prototype.league = "London";
ShowDog.prototype.stack = function() { return 'stacking';}

aShowDog = new ShowDog('pixy', 'Terrier');
console.log("My name is " + aShowDog.name + "I'm a " + aShowDog.breed);
console.log("Sending stack to pixy: " + aShowDog.stack());