An event handler for abort events sent to the window. (Not available with Firefox 2 or Safari).

While the standard for aborting a document load is defined, HTML issue #3525 suggests that browsers do not currently fire the "abort" event on window that would trigger onabort to be called.

TODO define what "abort" is. Closing the window via window manager? Stopping the load of the page? By which means and reasons (user, network/server)? At which stages would it fire / be catched? For IE, onabort is only available with img tags.


window.onabort =funcRef
  • funcRef: Reference to a function


window.onabort = function() {
  alert("Load aborted.");


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes ? ? ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes ? ? ? ? ?

Document Tags and Contributors

Last updated by: fscholz,