IDBIndex.getAllKeys()

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getAllKeys() 方法在 IDBIndex interface instantly retrieves the primary keys of all objects inside the index, setting them as the result of the request object.

句法

var allKeysRequest = IDBIndex.getAllKeys();
var allKeysRequest = IDBIndex.getAllKeys(query);
var allKeysRequest = IDBIndex.getAllKeys(query, count);

参数

query 可选: A key or an IDBKeyRange identifying the keys to retrieve. If this value is null or missing, the browser will use an unbound key range.
count 可选: The number records to return. If this value exceeds the number of records in the query, the browser will only retrieve the first item. If it is lower than 0 or greater than 2 ³² -1 a TypeError exception will be thrown.

返回值

IDBRequest object on which subsequent events related to this operation are fired.

异常

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

异常	描述
`TransactionInactiveError`	This `IDBIndex` 's transaction is inactive.
`InvalidStateError`	`IDBIndex` has been deleted or removed.

A TypeError exception is thrown if the count parameter is not between 0 and 2 ³² -1 included.

范例

var myIndex = objectStore.index('index');
var getAllKeysRequest = myIndex.getAllKeys();
getAllKeysRequest.onsuccess = function() {
  console.log(getAllKeysRequest.result);
}

规范

规范	状态	注释
索引数据库 API 草案 The definition of 'getAll()' in that specification.	推荐	初始定义。
索引数据库 API 草案 The definition of 'getAll()' 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
`getAllKeys`	Chrome 48	Edge ≤18	Firefox 44 Disabled 44 Disabled Disabled From version 44: this feature is behind the `dom.indexedDB.experimental` preference. To change preferences in Firefox, visit about:config.	IE No	Opera 35	Safari 10.1	WebView Android 48	Chrome Android 48	Firefox Android 44 Disabled 44 Disabled Disabled From version 44: this feature is behind the `dom.indexedDB.experimental` preference. To change preferences in Firefox, visit about:config.	Opera Android 35	Safari iOS 10.3	Samsung Internet Android 5.0

图例

完整支持
不支持
用户必须明确启用此特征。

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： Feb 16, 2020

IndexedDB API
IDBIndex
特性
方法
1. count()
2. get()
3. getAll()
4. getAllKeys()
5. getKey()
6. openCursor()
7. openKeyCursor()
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

另请参阅

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