The new keyword in JavaScript is detailed

Source: Internet
Author: User

Tags: func while on www pre ack other get Targe prototype

As in other high-level languages JavaScript also has the new operator, and we know that the new operator is used to instantiate a class to allocate an instance object in memory. But in JavaScript, all things are objects, why do we create objects through new? This article will bring you together to explore the mysteries of new in JavaScript ...

First, recognize the new operator:

function Animal (name) { = name;    }    Animal.color = "BLACK";    Animal.prototype.say = function () {        console.log ("I ' m" +;    };    var cat = new Animal ("cat");    Console.log (,  //cat       cat.height//undefined    );    Cat.say (); I ' m cat    console.log (,//animal       animal.color//back    );    Animal.say (); Animal.say is not a function

Not finished, to be continued ...

Constructor prototype Object object instance (2018-09-09--Baidu map gives inspiration)


The new keyword in JavaScript is detailed

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