The ononline property of the WorkerGlobalScope interface represents an EventHandler to be called when the online event occurs and bubbles through the Worker.


self.ononline = function() { ... };


The following code snippet shows an ononline handler set inside a worker:

self.ononline = function() {
  console.log('Your worker is now online');


Specification Status Comment
HTML Living Standard
The definition of 'WorkerGlobalScope.ononline' in that specification.
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 Firefox (Gecko) Internet Explorer Opera Safari
Basic support 4 29 (29) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 4 29.0 (29) 1.4 ? ? ?

See also

The WorkerGlobalScope interface it belongs to.

Document Tags and Contributors

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