js读取本地缓存

// 存储数据
localStorage.setItem('key', 'value');

// 读取数据
const value = localStorage.getItem('key');
console.log(value); // 输出: value

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

// 清空所有数据
localStorage.clear();

// 存储数据
sessionStorage.setItem('key', 'value');

// 读取数据
const value = sessionStorage.getItem('key');
console.log(value); // 输出: value

// 删除数据
sessionStorage.removeItem('key');

// 清空所有数据
sessionStorage.clear();

let db;
const request = indexedDB.open('myDatabase', 1);

request.onupgradeneeded = function(event) {
  db = event.target.result;
  const objectStore = db.createObjectStore('myStore', { keyPath: 'id' });
  objectStore.add({ id: 1, value: 'example' });
};

request.onsuccess = function(event) {
  db = event.target.result;
  const transaction = db.transaction(['myStore'], 'readonly');
  const objectStore = transaction.objectStore('myStore');
  const request = objectStore.get(1);

  request.onsuccess = function(event) {
    console.log(request.result.value); // 输出: { id: 1, value: 'example' }
  };
};

// 设置Cookie
document.cookie = "key=value; expires=Fri, 31 Dec 9999 23:59:59 GMT; path=/";

// 读取Cookie
function getCookie(name) {
  const value = `; ${document.cookie}`;
  const parts = value.split(`; ${name}=`);
  if (parts.length === 2) return parts.pop().split(';').shift();
}

const value = getCookie('key');
console.log(value); // 输出: value