通过几个例子了解apply、call、bind的区别

var user = {    name:"kim",    getName:function(){        console.log(this.name);    }}var func = user.getName;func(); //undefineduser.getName();// kim

我们是想打印user中的name属性，但是却打印出了undefined，why？直接执行user.getName是可以的

1.call()

var user = {    name:"kim",    getName:function(action, thing){        console.log(this.name + " " + action + " " + thing);    }}var func = user.getName;func.call(user, 'eat', 'rice') //kim eat rice

2.apply()

var user = {    name:"kim",    getName:function(action, thing){        console.log(this.name + " " + action + " " + thing);    }}var func = user.getName;func.apply(user, ['drive', 'car']) //kim drive car

3.bind()

var user = {    name:"kim",    getName:function(action, thing){        console.log(this.name + " " + action + " " + thing);    }}var func = user.getName;var func1 = func.bind(user);func1('like','coding') //kim like coding