The data read-only property of the Notification interface returns a structured clone of the notification's data, as specified in the data option of the Notification() constructor.

The notification's data can be any arbitrary data that you want associated with the notification.

Note: This feature is available in Web Workers.


var data =;


A structured clone.


The following snippet fires a notification; a simple options object is created, then the notification is fired using the Notification() constructor.

var options = {
  body: 'Do you like my body?',
  data: 'I like peas.'

var n = new Notification('Test notification',options); // should return 'I like peas.'


Specification Status Comment
Notifications API
The definition of 'data' in that specification.
Living Standard Living standard

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support 44 (Yes) No support No support 34 No support
Available in workers 44 ? 41.0 (41.0) ? 34 ?
Secure contexts only 62 ? ? ? 49 ?
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile
Basic support No support 44 (Yes) No support No support No support 34 No support
Available in workers No support 44 ? 41.0 (41.0) ? ? 34 ?
Secure contexts only No support 62 ? ? ? ? 49 ?

See also

Document Tags and Contributors

 Contributors to this page: jpmedley, libbymc, chrisdavidmills, phistuck
 Last updated by: jpmedley,