Searching for Javascript Window Onbeforeunload Support information? Find all needed info by using official links provided below.
https://www.w3schools.com/jsref/event_onbeforeunload.asp
The onbeforeunload event occurs when the document is about to be unloaded. This event allows you to display a message in a confirmation dialog box to inform the user whether he/she wants to stay or leave the current page. The default message that appears in …
https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload
When your page uses JavaScript to render content, the JavaScript may stop when leaving and then navigating back to the page. You can bind to window.onbeforeunload to prevent the browser from fully caching the page. If you do so, JavaScript in the page will be triggered on the subsequent return visit and update the content as desired. Specifications
https://community.adobe.com/t5/captivate/ie-onbeforeunload-event-and-javascript-calls/td-p/5329614
Jul 23, 2013 · Adobe Support Community ... I have a client that absolutly wants a dialog/alert to appear when the user attempts to close the browser window. However, after completing certain Captivate activities, the dialog can be disabled. ... IE, onbeforeunload event, and Javascript …
https://blog.revathskumar.com/2015/08/javascript-window-onbeforeunload.html
When you want to ask a confirmation from user about leaving a webpage by closing or refreshing window when their work is not saved, you can use window.onbeforeunload event for it.. unlike other events the use of confirm, alert and prompt will be ignored inside onbeforeunload event. We should return the message that we want show to the user.
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
http://help.dottoro.com/ljhtbtum.php
Occurs before the browser unloads the document and provides a possibility to display a confirmation dialog, where the user can confirm whether he wants to stay or leave the current page. The onbeforeunload event is not cancelable, because of security reasons, but if an event handler function for the onbeforeunload event returns a string value, this text will be shown in a confirmation dialog ...
https://stackoverflow.com/questions/3727216/window-onbeforeunload-support-in-firefox
window.onbeforeunload support in Firefox. Ask Question Asked 9 years, 3 months ago. Active 5 years, 7 months ago. Viewed 10k times 1. 1. I am using window.onbeforeunload in my javascript. This works perfectly in IE but is not triggered in Firefox. I checked on different links in stackoverflow.... In it I read that window.onbeforeunload is not ...
https://stackoverflow.com/questions/7527969/detecting-browsers-that-dont-support-onunload-onbeforeunload
Of all the browsers, it seems that only Opera doesn't support onunload/onbeforeunload events. (It's been fifteen years now, Opera!) Solutions for this issue have been covered many times, here for example: onbeforeunload support detection Unfortunately, as of Opera 11.51, ("onbeforeunload" in window) == true, but the actual onbeforeunload event is never executed!
https://developer.mozilla.org/en-US/docs/Web/API/Window/unload_event
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