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

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 4Edge ? Firefox Full support 29IE ? Opera ? Safari ? WebView Android Full support YesChrome Android Full support 40Edge Mobile ? Firefox Android Full support 29Opera Android ? Safari iOS ? Samsung Internet Android Full support 4.0


Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

The WorkerGlobalScope interface it belongs to.

Document Tags and Contributors

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