如何从闭包中获得变量

Posted by Eleanor Mao on 2017-05-18

这里讲一个简单的例子

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function foo(){
var person = {
"name": "joe",
"age": 18
}
return function getValue(name){
return person[name];
}
};
var bar = foo();
bar('name'); //=> 'joe'
Object.defineProperty(Object.prototype, 'self', {
get: function() {
return this;
}
});
bar('self'); //=> {name": "joe", "age": 18}

至于这么不让他通过扩展原型链获取数据,重写__proto__即可