删除对象
删除属性
删除对象的属性可以使用 delete 关键字，格式如下：
delete 对象.属性名
var person = new Object();
person.name = "孙悟空";
person.age = 18;
console.log(person);
delete person.name
console.log(person);删除对象的属性可以使用 delete 关键字，格式如下：
delete 对象.属性名
var person = new Object();
person.name = "孙悟空";
person.age = 18;
console.log(person);
delete person.name
console.log(person);