js+xml+保存数据格式

// 保存数据
localStorage.setItem('username', 'JohnDoe');

// 读取数据
let username = localStorage.getItem('username');
console.log(username); // 输出: JohnDoe

// 删除数据
localStorage.removeItem('username');

// 创建XML文档
let xmlDoc = document.implementation.createDocument(null, "users");

// 添加节点
let user = xmlDoc.createElement("user");
let name = xmlDoc.createElement("name");
name.textContent = "JohnDoe";
user.appendChild(name);
xmlDoc.documentElement.appendChild(user);

// 将XML转换为字符串
let serializer = new XMLSerializer();
let xmlString = serializer.serializeToString(xmlDoc);
console.log(xmlString); // 输出: <users><user><name>JohnDoe</name></user></users>

// 解析XML字符串
let parser = new DOMParser();
let parsedXmlDoc = parser.parseFromString(xmlString, "application/xml");
let parsedUser = parsedXmlDoc.getElementsByTagName("user")[0];
let parsedName = parsedUser.getElementsByTagName("name")[0].textContent;
console.log(parsedName); // 输出: JohnDoe