indexeddb获取上次按非字母顺序添加的记录

// 打开数据库
var request = indexedDB.open('myDatabase', 1);

request.onerror = function(event) {
  console.log('数据库打开错误');
};

request.onsuccess = function(event) {
  var db = event.target.result;
  
  // 获取对象存储空间
  var transaction = db.transaction(['myObjectStore'], 'readonly');
  var objectStore = transaction.objectStore('myObjectStore');
  
  // 创建游标
  var cursorRequest = objectStore.openCursor();
  
  cursorRequest.onsuccess = function(event) {
    var cursor = event.target.result;
    
    if (cursor) {
      // 过滤非字母顺序记录
      if (!isAlphabeticalOrder(cursor.value)) {
        console.log('非字母顺序添加的记录:', cursor.value);
      }
      
      cursor.continue();
    }
  };
  
  cursorRequest.onerror = function(event) {
    console.log('游标打开错误');
  };
};

function isAlphabeticalOrder(value) {
  // 判断是否按字母顺序添加的记录
  // 实现自定义的判断逻辑
  // 返回true或false
}