IDBObjectStore.delete()

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规范
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delete() 方法在 IDBObjectStore interface returns an IDBRequest object, and, in a separate thread, deletes the specified record or records.

Either a key or an IDBKeyRange can be passed, allowing one or multiple records to be deleted from a store. To delete all records in a store, use IDBObjectStore.clear .

Bear in mind that if you are using a IDBCursor ，可以使用 IDBCursor.delete() method to more efficiently delete the current record — without having to explicitly look up the record's key.

注意： 此特征可用于 Web 工作者 .

句法

var request = objectStore.delete(Key);
var request = objectStore.delete(KeyRange);

参数

键: The key of the record to be deleted, or an IDBKeyRange to delete all records with keys in range.

返回值

IDBRequest object on which subsequent events related to this operation are fired. The request.result attribute is set to undefined.

异常

此方法可能引发 DOMException of the following types:

异常	描述
`TransactionInactiveError`	This object store's transaction is inactive.
`ReadOnlyError`	The object store's transaction mode is read-only.
`InvalidStateError`	The object store has been deleted.
`DataError`	`key` 不是 valid key 或 key range .

范例

In the following code snippet, we open a read/write transaction on our database and delete one specific record out of our object store using delete() — a sample record with the key "Walk dog". 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 deleteData() function to delete a record from the database
  deleteData();
};
function deleteData() {
  // open a read/write db transaction, ready for deleting the data
  var transaction = db.transaction(["toDoList"], "readwrite");
  // report on the success of the transaction completing, when everything is done
  transaction.oncomplete = function(event) {
    note.innerHTML += '<li>Transaction completed.</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");
  // Make a request to delete the specified record out of the object store
  var objectStoreRequest = objectStore.delete("Walk dog");
  objectStoreRequest.onsuccess = function(event) {
    // report the success of our request
    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 'delete()' in that specification.	推荐
索引数据库 API 草案 The definition of 'delete()' 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
`delete`	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

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
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

IndexedDB API
IDBObjectStore
特性
方法
1. add()
2. clear()
3. count()
4. createIndex()
5. delete()
6. deleteIndex()
7. get()
8. getAll()
9. getAllKeys()
10. getKey()
11. index()
12. openCursor()
13. openKeyCursor()
14. put()
IndexedDB 相关页面

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句法

参数

返回值

异常

范例

规范

浏览器兼容性

图例

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