The source
read-only property of the IDBRequest
interface returns the source of the request, such as an Index or an object store. If no source exists (such as when calling indexedDB.open
), it returns null.
Note: This feature is available in Web Workers.
Syntax
var IDBIndex = request.source; var IDBCursor = request.source; var IDBObjectStore = request.source;
Value
An object representing the source of the request, such as an IDBIndex
, IDBObjectStore
or IDBCursor
.
Example
The following example requests a given record title, onsuccess
gets the associated record from the IDBObjectStore
(made available as objectStoreTitleRequest.result
), updates one property of the record, and then puts the updated record back into the object store in another request. The source of the 2nd request is logged to the developer console. For a full working example, see our To-do Notifications app ([[../../../../../../../mdn.github.io/to-do-notifications/index|view example live]].)
var title = "Walk dog"; // Open up a transaction as usual var objectStore = db.transaction(['toDoList'], "readwrite").objectStore('toDoList'); // Get the to-do list object that has this title as its title var objectStoreTitleRequest = objectStore.get(title); objectStoreTitleRequest.onsuccess = function() { // Grab the data object returned as the result var data = objectStoreTitleRequest.result; // Update the notified value in the object to "yes" data.notified = "yes"; // Create another request that inserts the item // back into the database var updateTitleRequest = objectStore.put(data); // Log the source of this request console.log("The source of this request is " + updateTitlerequest.source); // When this new request succeeds, run the displayData() // function again to update the display updateTitleRequest.onsuccess = function() { displayData(); }; };
Specifications
Specification | Status | Comment |
Indexed Database API 2.0The definition of 'source' in that specification. | Recommendation | |
Indexed Database API DraftThe definition of 'source' in that specification. | Recommendation |
Browser compatibility
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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
source
|
Chrome Full support 24 Full support 24 Full support 23 Prefixed' Implemented with the vendor prefix: webkit |
Edge
Full support 12 |
Firefox Full support 16 Full support 16 No support 10 — 16 Prefixed' Implemented with the vendor prefix: moz |
IE
Partial support 10 |
Opera
Full support 15 |
Safari
Full support 7 |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support 22 |
Opera Android
Full support 14 |
Safari iOS
Full support 8 |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
- Partial support
- Partial support
- Requires a vendor prefix or different name for use.'
- Requires a vendor prefix or different name for use.
See also
- Using IndexedDB
- Starting transactions:
IDBDatabase
- Using transactions:
IDBTransaction
- Setting a range of keys:
IDBKeyRange
- Retrieving and making changes to your data:
IDBObjectStore
- Using cursors:
IDBCursor
- Reference example: To-do Notifications ([[../../../../../../../mdn.github.io/to-do-notifications/index|view example live]].)
IDBRequest.source by Mozilla Contributors is licensed under CC-BY-SA 2.5.