代码如下
var obj={

name: 'zhagnsan',

age: 19
}
delete obj.name //true
typeof obj.name //undefined
var obj={

name: 'zhagnsan',

age: 19
}
delete obj.name //true
typeof obj.name //undefined通过delete操作符, 可以实现对对象属性的删除操作, 返回值是布尔可以删除其他东西吗
1.变量1.变量
var name ='zs' //已声明的变量
delete name //false
console.log(typeof name) //String

age = 19 //未声明的变量
delete age
//true
typeof age //undefined

this.val = 'fds' //window下的变量
delete this.val
//true
console.log(typeof this.val) //undefined
var name ='zs' //已声明的变量
delete name //false
console.log(typeof name) //String

age = 19 //未声明的变量
delete age
//true
typeof age //undefined

this.val = 'fds' //window下的变量
delete this.val
//true
console.log(typeof this.val) //undefined已声明的变量windows下的变量可以删除, 未声明的变量不可删除2.函数2.函数
var fn = function(){} //已声明的函数
delete fn
//false
console.log(typeof fn) //function

fn = function(){} //未声明的函数
delete fn
//true
console.log(typeof fn) //undefined
var fn = function(){} //已声明的函数
delete fn
//false
console.log(typeof fn) //function

fn = function(){} //未声明的函数
delete fn
//true
console.log(typeof fn) //undefined3.数组3.数组
var arr = ['1','2','3'] ///已声明的数组
delete arr //false
console.log(typeof arr) //object

arr = ['1','2','3'] //未声明的数组
delete arr //true
console.log(typeof arr) //undefined

var arr = ['1','2','3'] //已声明的数组
delete arr[1] //true
console.log(arr) //['1','empty','3']
var arr = ['1','2','3'] ///已声明的数组
delete arr //false
console.log(typeof arr) //object

arr = ['1','2','3'] //未声明的数组
delete arr //true
console.log(typeof arr) //undefined

var arr = ['1','2','3'] //已声明的数组
delete arr[1] //true
console.log(arr) //['1','empty','3'] 4.对象4.对象
var person = {
height: 180,
long: 180,
weight: 180,
hobby: {

ball: 'good',

music: 'nice'
}
}
delete person ///false
console.log(typeof person)
//object

var person = {
height: 180,
long: 180,
weight: 180,
hobby: {

ball: 'good',

music: 'nice'
}
}
delete person.hobby ///true
console.log(typeof person.hobby) //undefined
var person = {
height: 180,
long: 180,
weight: 180,
hobby: {

ball: 'good',

music: 'nice'
}
}
delete person ///false
console.log(typeof person)
//object

var person = {
height: 180,
long: 180,
weight: 180,
hobby: {

ball: 'good',

music: 'nice'
}
}
delete person.hobby ///true
console.log(typeof person.hobby) //undefined已声明的对象不可删除, 对象中的对象属性可以删除以上就是本文的全部内容，希望对大家的学习有所帮助。