The difference between Bind,apply,call

In JavaScript, bind, apply, and call methods can all explicitly bind the context this, what is the difference between these three?


Bind bind only this does not execute immediately

varperson ={firstname:' Darren ', LastName:' Ji ', Getfullname:function(){        varFullName = This. FirstName + "+ This. LastName; returnfullname; }};//in the browser, this is pointing to windowvarLogName =function(Arg1, arg2) {Console.log ( This. Getfullname ());}//bind just sets the point of this and does not itself performvarLogpersonname =Logname.bind (person);//Darren JiLogpersonname ();

Call not only binds this, but also executes immediately and accepts variable parameters

varperson ={firstname:' Darren ', LastName:' Ji ', Getfullname:function(){        varFullName = This. FirstName + "+ This. LastName; returnfullname; }};//in the browser, this is pointing to windowvarLogName =function(Arg1, arg2) {Console.log ( This. Getfullname ()); Console.log (' Arguments: ' + arg1 + ' +arg2);}//Darren Ji//arguments:en esLogname.call (person, ' en ', ' es ');

Apply not only binds this, but also executes immediately, and accepts the array

varperson ={firstname:' Darren ', LastName:' Ji ', Getfullname:function(){        varFullName = This. FirstName + "+ This. LastName; returnfullname; }};//in the browser, this is pointing to windowvarLogName =function(Arg1, arg2) {Console.log ( This. Getfullname ()); Console.log (' Arguments: ' + arg1 + ' +arg2);}//Darren Ji//arguments:en esLogname.apply (person, [' en ', ' es ']);

The difference between Bind,apply,call