JavaScript bind ()

Bind () Method:

A. ECMAScript5 also defines a method: Bind (). This method creates an instance of a function whose this value is bound to the value passed to the bind () function.

B. Browsers that support the bind () method are ie9+, firefox4+, safari5.1+, opera12+, and Chrome.

Window.color= "Red"; varO={color: "Blue"}; //global function DefinitionfunctionSaycolor () {Console.log ( This. color);} //The bind () method creates an instance of a function whose this value is bound to the value passed to the bind () function.varObjectsaycolor=Saycolor.bind (o); Objectsaycolor ();//BluevarMYOBJ ={specialfunction:function() {}, Anotherspecialfunction:function() {}, Getasyncdata:function(CB) {CB (); }, Render:function () {        varthat = This;  This. Getasyncdata (function() {that.specialfunction ();        That.anotherspecialfunction ();    }); }}; Myobj.render ();//-----------------------------------------------------varMYOBJ ={specialfunction:function() {}, Anotherspecialfunction:function() {}, Getasyncdata:function(CB) {CB (); }, Render:function () {         This. Getasyncdata (function () {             This. Specialfunction ();  This. Anotherspecialfunction (); }.bind ( This)); }}; Myobj.render ();//-----------------------------------------------------Function.prototype.bind () internal working principle: Function.prototype.bind=function(scope) {varfn = This; return function () {        returnfn.apply (scope); };}//-----------------------------------------------------varFoo ={x:3} varBar =function() {Console.log ( This. x);} Bar (); //undefined varBoundfunc =Bar.bind (foo); Boundfunc ();//3

Reference: http://blog.jobbole.com/58032/

JavaScript bind ()