(1) constructor (constructor)

 var Car = function (model, year, miles) {        this.model = model;        this.year = year;        this.miles = miles;        this.carSituation = function () {            console.log(this.model + this.year + this.miles);        };    };    var car1 = new Car(‘bens‘, 2014, 1000);    var car2 = new Car(‘mini‘, 2014, 1000);    car1.carSituation();    car2.carSituation();

(1) This is a basic constructor. The internal use of this pointer to reference newly created objects has the disadvantage of making inheritance difficult.

 

var Car = function (model, year, miles) {        this.model = model;        this.year = year;        this.miles = miles;    };    Car.prototype.carSituation = function(){        console.log(this.model + this.year + this.miles);    };    var car1 = new Car(‘bens‘, 2014, 1000);    var car2 = new Car(‘mini‘, 2014, 1000);    car1.carSituation();    car2.carSituation();

(2) This is a prototype constructor. You can create multiple objects and access the same prototype. Therefore, you can extend the original example.

(1) constructor (constructor)