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function fun(){
this.name = ‘mm‘;
}
var obj = new fun();
console.log(obj.name);//mm
delete obj.name;
console.log(obj.name); //undefined
2、变量不能删除
var
name =
‘lily‘
;
delete
name;
console.log(name);
//lily
3、删除不了原型链中的变量
fun.prototype.age = 18;
delete
obj.age;
console.log(obj.age)
//18
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原文地址:http://www.cnblogs.com/Yirannnnnn/p/4846407.html