JavaScript is implemented in a class inheritance

The JavaScript class is the default prototype object inheritance:

var person = function () {    this.name = "people";    This.hello = function () {      console.log ("Hello User:" + this.name);}    } var user = function () {    this.name = "user";    This.hello = function () {      User.prototype.hello.call (this, arguments);      Console.log ("Hello User:" + this.name);}    } User.prototype = new Person (); new User (). hello ();

There is no one way. You can make JavaScript classes like Java, calling the parent class through a superkeyword, so I extend the function:

(function () {Function.prototype.extend = function (BaseClass) {//This is a function object.        var oldprototype = This.prototype, Newprototype = {}, _super = new BaseClass ();        Inherits all properties and methods.        for (var name in _super) {Newprototype[name] = _super[name];            } for (var name in oldprototype) {//* Override properties in this new Class.                if (Oldprototype.hasownproperty (name)) {//Only function need _super. if (typeof oldprototype[name] = = "function" && typeof _super[name] = = "function") {Newprototyp E[name] = (function (name, FN) {return function () {var tmp = t                                                                His._super;                                Set Super Method This._super = _super[name]; var ret = fn.apply (this, arguments);                                            This._super = tmp;                            return ret;                        };                }) (name, Oldprototype[name]);                }}} This.prototype = Newprototype;    return this; };}) ();

Test code

var A = function () {    This.hello = function () {        console.log ("Hello, I ' m A");}    }; var B = function () {}; B.prototype = {    hello:function () {        this._super ();        Console.log ("Hello, I ' m B");    }; B.extend (A); var C = function () {}; C.prototype = {    hello:function () {        this._super ();        Console.log ("Hello, I ' m C");    }; C.extend (b); var B = new B (); var c = new C ();//b.hello (); C.hello ();

Results

Hello, i ' m ahello, I ' M bhello, I ' m C

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JavaScript is implemented in a class inheritance