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HTML onunload Event Attributes
The onunloadevent is a JavaScript event that is triggered when a document is in the process of being unloaded from the browser. This occurs when a user navigates away from the current page, refreshes it, or closes the browser tab or window. The event belongs to the WindowEventHandlers
interface and allows developers to execute specific actions during the unloading process.
Window Event Attributes
Attributes | Description |
---|---|
onafterprint | Fires after the document has started printing or the print dialog box has been closed. |
onbeforeprint | Fires before the document is about to be printed. |
onbeforeunload | Fires when the document is about to be unloaded. |
onerror | Fires when an error occurs during loading of an external file (e.g., images or scripts). |
onhashchange | Fires when the anchor part of the URL has changed. |
onload | Fires when the page has finished loading. |
onmessage | Fires when a message is received through an event source (e.g., WebSocket or iframe). |
onoffline | Fires when the browser starts working offline. |
ononline | Fires when the browser starts working online. |
onpagehide | Fires when the user navigates away from a webpage. |
onpageshow | Fires when the user navigates to a webpage. |
onpopstate | Fires when the active history entry changes (e.g., when the user clicks the back or forward button). |
onresize | Fires when the browser window is resized. |
onstorage | Fires when a Web Storage area is updated (e.g., localStorage or sessionStorage). |
onunload | Fires once a page is unloaded (or the browser window is closed). |
HTML Attributes | Global Attributes | Event Attributes |
---|---|---|
To view the full list | To view the full list | To view the full list |
elements | |||||
---|---|---|---|---|---|
onunload | Yes | Yes | Yes | Yes | Yes |
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