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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4 ?29 ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes40 ?29 ? ?4.0

See also

The WorkerGlobalScope interface it belongs to.

Document Tags and Contributors

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