var n = 'window'
var o = {
n: 'my',
myfunc: function() {
console.log(this.n);
},
myfun2: function() {
//箭头函数可以
return () => {
console.log(this.n);
}
},
myfun3: function() {
//闭包
var that = this;
return function() {
console.log(that.n);
}
}
myfun4: function() {
//bind
return (function() {
console.log(this.n)
}).bind(this)
}
};