Methods for JavaScript Object inheritance

Writing this topic is simply to take notes for yourself, or old forget.

The first method:

function fn1 (x) {this.x = x;        } function fn2 (x, y) {this.tmpobj = fn1;        This.tmpobj (x);        Delete this.tmpobj;    This.y = y; }

Second method: Call () or apply ()

function fn1 (x) {this.x = x;        } function fn2 (x, y) {Fn1.call (this, x);    This.y = y; }

Third method: Prototype chain inheritance

function fn1 (x) {this.x = x;    } fn1.prototype.y = function () {Console.log ("I Am pomelo");    } function Fn2 () {} Fn2.prototype = new fn1 ();    Fn2.prototype.constructor = fn2;    var fn2obj = new Fn2 (); Fn2obj.y ();

The most used is the second and the third type.

function fn1 (x) {this.x = x;    } fn1.prototype.z = function () {Console.log ("I Am pomelo");        } function fn2 (x, y) {fn1.apply (this, [x]);    This.y = y;    } Fn2.prototype = new fn1 ();    Fn2.prototype.constructor = fn2;    var fn2obj = new Fn2 (1024, 2048);    Console.log (fn2obj.x);    Console.log (FN2OBJ.Y); Fn2obj.z ();

Methods for JavaScript Object inheritance