this

https://segmentfault.com/q/1010000008856410

var num=1;
var myObject ={
num :2,
add:function(){
this.num=3;
(function(){
console.log(this);
this.num=4;
})();
console.log(this);
},
sub:function(){
console.log(this.num);
}
}

myObject.add();

console.log(myObject.num);
console.log(num);
var sub = myObject.sub;
sub();

自运行函数其实是window对象调用它

https://segmentfault.com/q/1010000004648772

this

原文：https://www.cnblogs.com/lctstruggle/p/9158064.html