Question

我有一个名为data的对象，并且在数据控制台上，我做到了：

var data={
     countrycode: "376",
     dob: "2017-05-24",
     email: "bsbsbs@gmail.com",
     firstName: "ggsgsggsg",
     gender: "male",
     phoneNumbers: "88888888888888888",
     surName: "hshshhshs"
    }

let countrycode,iso2,number,firstName,surName,dob,gender,email;
countrycode=data.countrycode;
number=data.phoneNumbers;
firstName=data.firstName;
surName=data.surName;
email:data.email;
gender:data.gender;
dob:data.dob;
console.log('email is',email);
console.log('number is ',number);
console.log('gender is',gender);
console.log('surName is',surName);
console.log('dob is',dob);
console.log('firstName is',firstName);

我看到的是，当我在控制台上记录这些值时，我对电子邮件，性别和dob的定义未定义，而对于其他其余部分，我得到了正确的值。这可能是什么原因，为什么会发生？

Answer 1

在给出的示例中，您必须实际使用=作为赋值运算符，冒号用于对象属性赋值。

email = data.email;
gender = data.gender;
dob = data.dob;

Answer 2

使用=进行分配，而不使用:（保留给对象的属性分配值）。

应该是

email=data.email;

不是

email:data.email;

var data={
     countrycode: "376",
     dob: "2017-05-24",
     email: "bsbsbs@gmail.com",
     firstName: "ggsgsggsg",
     gender: "male",
     phoneNumbers: "88888888888888888",
     surName: "hshshhshs"
    }

let countrycode,iso2,number,firstName,surName,dob,gender,email;
countrycode=data.countrycode;
number=data.phoneNumbers;
firstName=data.firstName;
surName=data.surName;
email=data.email;
gender=data.gender;
dob=data.dob;
console.log('email is ',email);
console.log('number is ',number);
console.log('gender is ',gender);
console.log('surName is ',surName);
console.log('dob is ',dob);
console.log('firstName is ',firstName);

通过将对象数据存储在变量中来打印数据

2 个答案: