js如何将json数据库中

// 打开或创建一个数据库
let request = indexedDB.open('myDatabase', 1);

request.onupgradeneeded = function(event) {
  let db = event.target.result;
  let objectStore = db.createObjectStore('customers', { keyPath: 'id' });
  objectStore.createIndex('name', 'name', { unique: false });
};

request.onsuccess = function(event) {
  let db = event.target.result;
  
  // 添加数据
  let transaction = db.transaction(['customers'], 'readwrite');
  let objectStore = transaction.objectStore('customers');
  let customer = { id: 1, name: 'John Doe', email: 'john@example.com' };
  let request = objectStore.add(customer);
  
  request.onsuccess = function(event) {
    console.log('数据已成功添加到数据库');
  };
  
  request.onerror = function(event) {
    console.log('添加数据时出错: ' + event.target.errorCode);
  };
};

request.onerror = function(event) {
  console.log('打开数据库时出错: ' + event.target.errorCode);
};