代码如下

var obj={ name: 'zhagnsan', age: 19 }delete obj.name //truetypeof 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

var name ='zs' //已声明的变量delete name //falseconsole.log(typeof name) //Stringage = 19 //未声明的变量delete age //truetypeof age //undefinedthis.val = 'fds' //window下的变量delete this.val //trueconsole.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

var fn = function(){} //已声明的函数delete fn //falseconsole.log(typeof fn) //functionfn = function(){} //未声明的函数delete fn //trueconsole.log(typeof fn) //undefined

3.数组

var arr = ['1','2','3'] ///已声明的数组delete arr //falseconsole.log(typeof arr) //objectarr = ['1','2','3'] //未声明的数组delete arr //true console.log(typeof arr) //undefinedvar arr = ['1','2','3'] //已声明的数组delete arr[1] //trueconsole.log(arr) //['1','empty','3']

4.对象

var person = { height: 180, long: 180, weight: 180, hobby: { ball: 'good', music: 'nice' }}delete person ///falseconsole.log(typeof person) //objectvar person = { height: 180, long: 180, weight: 180, hobby: { ball: 'good', music: 'nice' }}delete person.hobby ///trueconsole.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，也希望大家多多支持。