javascript - 将数据附加到 localStorage 对象

Question

我正在尝试向当前的 localStorage 对象添加一个新对象，但没有成功。最后，我没有在 localStorage 中拥有两组数据，而是得到了最后一组。对我做错了什么有任何见解吗？谢谢

这是我正在尝试做的事情:

// add the first student
var newStudent = [{
     "name":        "John",
     "age":         21,
     "nationality": "Spanish"
 }];

localStorage.setItem("students", JSON.stringify(newStudent));


// Retrieve the object from storage to add a new student
var retrievedObject = localStorage.getItem("students");
var stored          = JSON.parse(retrievedObject);

// add a new student
var newStudent2 = [{
    "name":        "Mary",
    "age":         20,
    "nationality": "German"
}];
var stored = Object.assign(stored, newStudent2);

// Update the storage
localStorage.setItem("students", JSON.stringify(stored));
var result = localStorage.getItem("students");

console.log(result);

Answer 1

你应该存储数组，而不是对象；

var students = [];

var student1 = { s: 1 };

students.push(student1);

localStorage.setItem("students", JSON.stringify(students));

var stored = JSON.parse(localStorage.getItem("students"));

var student2 = { s: 2 };

stored.push(student2);

localStorage.setItem("students", JSON.stringify(stored));

var result = JSON.parse(localStorage.getItem("students"));

console.log(result);