Onbeforeunload event is prompted when the browser is closed
- 2020-03-30 01:04:25
Onbeforeunload event it is used like this:
This causes the onbeforeunload event to be triggered every time the browser window is closed or a new page is flushed.
Extract as follows: onbeforeunload event:
Object. Onbeforeunload = handler
< Element onbeforeunload = "handler"... > < / element>
Description: when the event is triggered, a dialog box with "ok" and "cancel" will pop up. The handler can set a return value as the display text for the dialog.
Close the browser window
When going to another page through the address bar or favorites
Click back, forward, refresh, one of the home pages
When clicking on a url to link to another page
When any of the following events are called: click, document write, document open, document close, window close, window write, window NavigateAndFind,location replace,location reload,form submit.
When you open a page with window open and pass the name of the window on that page to the page you want to open.
When you re-assign the value of location.href.
When submitting a form with the specified action via the input type= "submit" button.
It can be used in the following elements: BODY, FRAMESET, window