IDBTransaction: error event

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范例
浏览器兼容性
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error event is fired on IDBTransaction when a request returns an error and the event bubbles up to the transaction object.

冒泡	Yes
可取消	No
接口	`事件`
事件处理程序特性	`onerror`

范例

This example opens a database and tries to add a record, listening for the error 事件为 add() operation (this will occur if, for example, a record with the given taskTitle already exists):

// Open the database
const dBOpenRequest = window.indexedDB.open('toDoList', 4);
dBOpenRequest.onupgradeneeded = (event) => {
  const db = event.target.result;
  // Create an objectStore for this database
  const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
  // define what data items the objectStore will contain
  objectStore.createIndex('hours', 'hours', { unique: false });
  objectStore.createIndex('minutes', 'minutes', { unique: false });
  objectStore.createIndex('day', 'day', { unique: false });
  objectStore.createIndex('month', 'month', { unique: false });
  objectStore.createIndex('year', 'year', { unique: false });
};
dBOpenRequest.onsuccess = (event) => {
  const db = dBOpenRequest.result;
  // open a read/write db transaction, ready for adding the data
  const transaction = db.transaction(['toDoList'], 'readwrite');
  transaction.addEventListener('error', () => {
    console.log(`Error adding new item: ${newItem.taskTitle}`);
  });
  const objectStore = transaction.objectStore('toDoList');
  const newItem = { taskTitle: 'my task', hours: 10, minutes: 10, day: 10, month: 'January', year: 2020 };
  const objectStoreRequest = objectStore.add(newItem);
};

The same example, using the onerror property instead of addEventListener() :

// Open the database
const dBOpenRequest = window.indexedDB.open('toDoList', 4);
dBOpenRequest.onupgradeneeded = (event) => {
  const db = event.target.result;
  // Create an objectStore for this database
  const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
  // define what data items the objectStore will contain
  objectStore.createIndex('hours', 'hours', { unique: false });
  objectStore.createIndex('minutes', 'minutes', { unique: false });
  objectStore.createIndex('day', 'day', { unique: false });
  objectStore.createIndex('month', 'month', { unique: false });
  objectStore.createIndex('year', 'year', { unique: false });
};
dBOpenRequest.onsuccess = (event) => {
  const db = dBOpenRequest.result;
  // open a read/write db transaction, ready for adding the data
  const transaction = db.transaction(['toDoList'], 'readwrite');
  transaction.onerror = () => {
    console.log(`Error adding new item: ${newItem.taskTitle}`);
  };
  const objectStore = transaction.objectStore('toDoList');
  const newItem = { taskTitle: 'my task', hours: 10, minutes: 10, day: 10, month: 'January', year: 2020 };
  const objectStoreRequest = objectStore.add(newItem);
};

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` event	Chrome 24 24 23 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 16 16 不支持 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz	IE 部分支持 10	Opera 15	Safari 7	WebView Android Yes	Chrome Android Yes	Firefox Android 22	Opera Android 14	Safari iOS 8	Samsung Internet Android Yes

图例

完整支持
部分支持
要求使用供应商前缀或不同名称。

另请参阅

使用 IndexedDB
onerror event handler property

元数据

最后修改： Mar 18, 2019

IndexedDB API
IDBTransaction
特性
1. db
2. error
3. mode
4. objectStoreNames
5. onabort
6. oncomplete
7. onerror
方法
事件
1. abort
2. complete
继承：
1. EventTarget
IndexedDB 相关页面

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浏览器兼容性

图例

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