js 原型里面写方法

字符串

 String.prototype.todos = function(){
console.log("124")
}

var sd = "112322";

sd.todos()
124

对象

Object.prototype.sss = function(){
console.log(this);
}

new Object = daa;

daa.dd = "111"
daa.sss();

{dd: "111"}