当sessionstorage不可用时，有哪些可替代的方案可以使用？

// 设置一个 cookiedocument.cookie = "name=John Doe; expires=Thu, 18 Dec 2025 12:00:00 UTC; path=/";// 获取一个 cookieconst cookies = document.cookie.split("; ");for (let i = 0; i < cookies.length; i++) {  const cookie = cookies[i].split("=");  const name = cookie[0];  const value = cookie[1];  if (name === "name") {    console.log(value); // 输出 "John Doe"    break;  }}

// 设置 local storagelocalStorage.setItem("name", "John Doe");// 获取 local storageconst name = localStorage.getItem("name");console.log(name); // 输出 "John Doe"

// 打开或创建 IndexedDB 数据库const request = window.indexedDB.open("myDatabase", 1);request.onerror = function(event) {  console.log("打开/创建数据库失败");};request.onsuccess = function(event) {  const db = event.target.result;  // 创建一个事务  const transaction = db.transaction(["myObjectStore"], "readwrite");  // 获取一个对象存储空间  const objectStore = transaction.objectStore("myObjectStore");  // 存储数据  objectStore.add({ name: "John Doe" });  // 检索数据  const request = objectStore.get(1);  request.onsuccess = function(event) {    console.log(event.target.result.name); // 输出 "John Doe"  };};request.onupgradeneeded = function(event) {  const db = event.target.result;  // 创建一个对象存储空间  const objectStore = db.createObjectStore("myObjectStore", { keyPath: "id", autoIncrement: true });  // 创建索引  objectStore.createIndex("name", "name", { unique: false });};