项目中有些属性使用之后需要重置
1 var user = {}; 2 user.name = "123"; 3 user.age="30"; 4 console.log(user) 5 // {name:123,age:30} 6 delete user.name; 7 或者delete user['name']; 8 console.log(user) 9 //{age:30}