js--using constructor functions to create new objects and operations

By invoking the function with the new operator to reach the object this is worth the purpose, the constructor returns the object it created to us.

Directly on the code

To create a constructor function

function Gadget (name, color) {

THIS.name = name;//Add Property

This.color = color;

This.whatareyou = function () {//Add method

return This.color + "" + this.name;

}

}

Another way to add properties and methods, through the prototype property of the constructor function, is to add

Gadget.prototype.price = 100;//Prototype Properties

Gadget.prototype.rating = 3;

Gadget.prototype.getInfo = function () {

Return this.price+ "" +this.rating;

}

/* Shorthand

Gadget.prototype = {

PRICE:100,

Rating = 3,

GetInfo = function () {

return This.price + "" +this.rating;

}

}

*/

To create a new object using the constructor

var newtoy = new Gadget (' webcam ', ' black ');

newtoy.name;//

---->>webcam

The object is passed by reference, that is, the object entity created does not have a copy of its own prototype, and the value passing produces a copy

Gadget.prototype.get = function (what) {

return This[what];

}

Newtoy.name

If the name attribute exists in the properties and prototypes of the object itself, the property of the object itself takes precedence over the properties of the prototype

The Name property in the prototype is used when you delete the (delete newtoy.name) object property

js--using constructor functions to create new objects and operations