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Definition and Usage
The onunload event occurs once a page has unloaded (or the browser window has been closed).
onunload occurs when the user navigates away from the page (by clicking on a link, submitting a form, closing the browser window, etc.)
Note: The onunload event is also triggered when a user reloads the page (+ the onload event).
The onunload event is supported in IE, Firefox, and Safari, but not supported properly in Chrome or Opera.
onunload is Supported by the Following HTML Tags:
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