IDBRequest.source

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 (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 2.0
The definition of 'source' in that specification.
Recommendation
Indexed Database API Draft
The definition of 'source' in that specification.
Recommendation

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
sourceChrome Full support 24
Full support 24
Full support 23
Prefixed
Prefixed Implemented with the vendor prefix: webkit
Edge Full support 12Firefox Full support 16
Full support 16
No support 10 — 16
Prefixed
Prefixed Implemented with the vendor prefix: moz
IE Partial support 10Opera Full support 15Safari Full support 7WebView Android Full support YesChrome Android Full support YesFirefox Android Full support 22Opera Android Full support 14Safari iOS Full support 8Samsung 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