在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

IDBTransaction.error 特性为 IDBTransaction interface returns one of several types of error when there is an unsuccessful transaction.

注意： 此特征可用于 Web 工作者 .

句法

var myError = transaction.error;
					

值

A DOMError containing the relevant error. In Chrome 48+/Firefox 58+ this property returns a DOMException 因为 DOMError has been removed from the DOM standard. The exact error is one of serveral possibilities. It can be a reference to the same error as the request object that raised it, or a transaction failure (for example QuotaExceededError or UnknownError ).

此特性是 null if the transaction is not finished, is finished and successfully committed, or was aborted with the IDBTransaction.abort 方法。

范例

In the following code snippet, we open a read/write transaction on our database and add some data to an object store. Note also the functions attached to transaction event handlers to report on the outcome of the transaction opening in the event of success or failure. Note the transaction.onerror = function(event) { }; block, making use of transaction.error to help in reporting what went wrong when the transaction was unsuccessful. For a full working example, see our 待办通知 app ( 实时查看范例 )。

// Let us open our database
var DBOpenRequest = window.indexedDB.open("toDoList", 4);
DBOpenRequest.onsuccess = function(event) {
  note.innerHTML += '<li>Database initialised.</li>';
  // store the result of opening the database in the db variable.
  // This is used a lot below
  db = DBOpenRequest.result;
  // Run the addData() function to add the data to the database
  addData();
};
function addData() {
  // Create a new object ready for being inserted into the IDB
  var newItem = [ { taskTitle: "Walk dog", hours: 19, minutes: 30, day: 24, month: "December", year: 2013, notified: "no" } ];
  // open a read/write db transaction, ready for adding the data
  var transaction = db.transaction(["toDoList"], "readwrite");
  // report on the success of opening the transaction
  transaction.oncomplete = function(event) {
    note.innerHTML += '<li>Transaction completed: database modification finished.</li>';
  };
  transaction.onerror = function(event) {
    note.innerHTML += '<li>Transaction not opened due to error: ' + transaction.error + '</li>';
  };
  // create an object store on the transaction
  var objectStore = transaction.objectStore("toDoList");
  // add our newItem object to the object store
  var objectStoreRequest = objectStore.add(newItem[0]);
  objectStoreRequest.onsuccess = function(event) {
    // report the success of the request (this does not mean the item
    // has been stored successfully in the DB - for that you need transaction.onsuccess)
    note.innerHTML += '<li>Request successful.</li>';
  };
};
					

规范

规范	状态	注释
索引数据库 API 2.0 The definition of 'error' in that specification.	推荐
索引数据库 API 草案 The definition of 'error' in that specification.	推荐

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
error	Chrome 24 24 23 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 16 16 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz	IE 部分支持 10	Opera 15	Safari 7	WebView Android Yes Yes ? — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Chrome Android 25 25 25 — 57 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android 22	Opera Android 14	Safari iOS 8	Samsung Internet Android 1.5 1.5 1.5 — 7.0 Prefixed Prefixed Implemented with the vendor prefix: webkit
DOMException value instead of DOMError	Chrome 48	Edge ≤18	Firefox 58	IE 不支持 No	Opera Yes	Safari 不支持 No	WebView Android 48	Chrome Android 48	Firefox Android 58	Opera Android Yes	Safari iOS 不支持 No	Samsung Internet Android 5.0

图例

完整支持

完整支持

部分支持

部分支持

不支持

不支持

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

另请参阅

• 使用 IndexedDB
• 开始事务： IDBDatabase
• 使用事务： IDBTransaction
• 设置一系列键： IDBKeyRange
• 检索并使您的数据改变： IDBObjectStore
• 使用光标： IDBCursor
• 参考范例： 待办通知 ( 实时查看范例 )。

元数据

• 最后修改： 2020 年 1 月 22 日

相关话题

1. IndexedDB API
2. IDBTransaction
3. 特性

   1. db
   2. error
   3. mode
   4. objectStoreNames
   5. onabort
   6. oncomplete
   7. onerror
4. 方法

   1. abort()
   2. commit()
   3. objectStore()
5. 事件

   1. abort
   2. complete
6. 继承：

   1. EventTarget
7. IndexedDB 相关页面

   1. IDBCursor
   2. IDBCursorSync
   3. IDBCursorWithValue
   4. IDBDatabase
   5. IDBDatabaseException
   6. IDBDatabaseSync
   7. IDBEnvironment
   8. IDBEnvironmentSync
   9. IDBFactory
   10. IDBFactorySync
   11. IDBIndex
   12. IDBIndexSync
   13. IDBKeyRange
   14. IDBObjectStore
   15. IDBObjectStoreSync
   16. IDBOpenDBRequest
   17. IDBRequest
   18. IDBTransactionSync
   19. IDBVersionChangeEvent
   20. IDBVersionChangeRequest