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