IDBRequest.readyState

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This article is in need of a technical review.

The readyState property of the IDBRequest interface returns the state of the request.

Every request starts in the pending state. The state changes to done when the request completes successfully or when an error occurs.

Syntax

var currentReadyState = request.readyState;

Value

The IDBRequestReadyState of the request, which takes one of the following two values:

Value Meaning
pending The request is pending.
done The request is done.
 

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 readyState 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 it's 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 readyState of this request is " + updateTitlerequest.readyState);

  // 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
The definition of 'readyState' in that specification.
Candidate Recommendation  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 23webkit
24
10 moz
16.0 (16.0)
10, partial 15 7.1
Feature Android Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support 4.4 22.0 (22.0) 1.0.1 10 22 Not supported

See also

Document Tags and Contributors

Contributors to this page: fscholz, chrisdavidmills
Last updated by: fscholz,