js delete 用法(删除对象属性及变量)

1,对象属性删除

function fun(){
 
this.name = \'mm\';
 
}
 
var obj = new fun();
 
console.log(obj.name);//mm
 
delete obj.name;
 
console.log(obj.name); //undefined

2,变量删除

var name = \'lily\';

delete name;

console.log(name); //lily

直接用delelte删除不了变量

3,删除不了原型链中的变量

fun.prototype.age = 18;

delete obj.age;

console.log(obj.age) //18

转自: http://www.jb51.net/article/54247.htm

参考:http://www.jb51.net/article/20428.htm (JavaScript 三种创建对象的方法)