We're looking for a person or people to help audit MDN to find places we could speed up. Is this you or someone you know? Check out the RFP: https://mzl.la/2IHcMiE

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


window.onclose = funcRef;


  • funcRef is a reference to a function.


window.onclose = resetThatServerThing;


Specification Status Comment
HTML Living Standard
The definition of 'onclose' 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 (WebKit)
Basic support (Yes) ? ? ? No support
Feature Android Android Webview Chrome for Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile
Basic support ? (Yes) (Yes) ? ? ? ? No support

Document Tags and Contributors

 Last updated by: jpmedley,