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


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


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

self.onerror = function() {
  console.log('There is an error inside your worker!');


Specification Status Comment
HTML Living Standard
The definition of 'WorkerGlobalScope.onerror' in that specification.
Living Standard

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
onerrorChrome Full support 4Edge Full support 12Firefox Full support 3.5IE Full support YesOpera Full support 11.5Safari Full support 4WebView Android Full support 37Chrome Android Full support 40Firefox Android Full support 4Opera Android Full support YesSafari iOS Full support 5.1Samsung Internet Android Full support 4.0


Full support
Full support

See also

The WorkerGlobalScope interface it belongs to.