Searching for Window Onunload Browser Support information? Find all needed info by using official links provided below.
https://www.w3schools.com/jsref/event_onunload.asp
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 (and the onload event).
https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onunload
The onunload property of the WindowEventHandlers mixin is the EventHandler for processing unload events. These events fire when the window is unloading its content and resources. The resource removal is processed after the unload event occurs.
https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload
These events fire when a window is about to unload its resources. At this point, the document is still visible and the event is still cancelable. ... WindowEventHandlers.onbeforeunload. Web technology for developers. Web APIs. ... Expect poor cross-browser support. Non-standard. Expect poor cross-browser support. Deprecated. Not for use in new ...
https://stackoverflow.com/questions/7794301/window-onunload-is-not-working-properly-in-chrome-browser-can-any-one-help-me
The onunload event won't fire if the onload event did not fire. Unfortunately the onload event waits for all binary content (e.g. images) to load, and inline scripts run before the onload event fires. DOMContentLoaded fires when the page is visible, before onload does. And it is now standard in HTML 5, and you can test for browser support but note this requires the <!DOCTYPE html> (at least in ...
https://developer.mozilla.org/en-US/docs/Web/API/Window/unload_event
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https://stackoverflow.com/questions/7389554/crossbrowser-onbeforeunload
Does window.onbeforeunload() fire in all browsers? I need a onbeforeunload functionality which is supported at least by IE6 and FF3.6. ... Crossbrowser onbeforeunload? Ask Question Asked 8 years, 3 months ago. ... It's my recollection that IE was the only browser to implement onbeforeunload, but some browsers have taken it upon themselves to ...
https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event
Attaching an event handler/listener to window or document's beforeunload event prevents browsers from using in-memory page navigation caches, like Firefox's Back-Forward cache or WebKit's Page Cache. The HTML specification states that calls to window.alert(), window.confirm(), and window.prompt() methods may be
https://www.w3schools.com/tags/ev_onunload.asp
The onunload attribute fires 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: If you reload a page, you will also trigger the onunload event (and the onload event).
http://w3schools.invisionzone.com/topic/48418-why-onunload-does-not-work/
Sep 04, 2013 · Hey guys, I have a small problem here the onunload event does not work on my firefox...don't know why. this was the example i tried to run on my browser it's from w3schools
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