This example demonstrates how to assign an "onbeforeunload" event to a body element.
Close this window, press F5 or click on the link below to invoke the onbeforeunload event.
<!DOCTYPE html> <html> <body onbeforeunload="return myFunction()"> <a href="https://www.java2s.com">Click here to go to java2s.com</a> <script> function myFunction() {//from w w w . j av a 2 s. c om return "Write something clever here..."; } </script> </body> </html>
| Bubbles: | No |
|---|---|
| Cancelable: | Yes |
| Event type: | UiEvent if generated from a user interface, Event otherwise |
| Supported HTML tags: | <body> |