jsdelete用法(删除对象属性及变量)
来源：动视网
责编：小采
时间：2020-11-27 20:26:16
jsdelete用法(删除对象属性及变量)
jsdelete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); //undefined2,变量删除var name = 'lily
导读jsdelete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); //undefined2,变量删除var name = 'lily
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); //undefined2,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
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jsdelete用法(删除对象属性及变量)
jsdelete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); //undefined2,变量删除var name = 'lily
