I would guess that they are using the History API. By listening to popstate window.addEventListener(“popstate”, function(e) { … }); you can show a warning before allowing doing anything stupid.
You can do something like this: var unsavedChanges = false; window.onbeforeunload = function() { if (unsavedChanges) return ‘You have unsaved changes!’; } function makeSomeChange() { // do some changes…. unsavedChanges = true; } You can make sure to change unsavedChanges in the ‘change’ event handlers.
As mentioned, same origin policy prevents Javascript from detecting such events. But there’s a quite simple solution which allows you to detect closure of such windows. Here’s the JS code: var openDialog = function(uri, name, options, closeCallback) { var win = window.open(uri, name, options); var interval = window.setInterval(function() { try { if (win == null … Read more
You should use a hidden input as a refresh indicator, with a value of “no”: <input type=”hidden” id=”refresh” value=”no”> Now using jQuery, you can check its value: $(document).ready(function(e) { var $input = $(‘#refresh’); $input.val() == ‘yes’ ? location.reload(true) : $input.val(‘yes’); }); When you click on the back button, the values in hidden fields retain the … Read more
Thank you for your replies! It turns out I was completely wrong about this being a browser issue – the problem was on the server. ASP.NET serializes requests of the same session that require session state, so in this case, the next page didn’t begin processing on the server until those ajax-initiated requests completed. Unfortunately, … Read more
window.onbeforeunload = function() { return ‘You have unsaved changes!’; } See the MSDN article on onbeforeunload Also there is a similar question in SO
Answer: $(window).on(‘beforeunload’, function() { var x =logout(); return x; }); function logout(){ jQuery.ajax({ }); return 1+3; } A little mix and match, but it worked for me. The 1+3 makes sure that the logout function is being called (you’ll see 4 if it’s successful on the popup when you try to leave).
This popup with text as Reload site? Changes you made may not be saved is the implementation of onbeforeunload property of WindowEventHandlers onbeforeunload The onbeforeunload property of the WindowEventHandlers mixin is the EventHandler for processing beforeunload events. These events fire when a window is about to unload its resources. At this point, the document is … Read more
This works perfectly for me in both Chrome and Safari: <html><body><p>Test</p> <script>window.onbeforeunload = function() { return “Sure?”; }</script> </body></html> When I try to close the window, I get the prompt.
onunload is responsible for executing an instruction when the page is closed. It also causes issue with IE and AJAX. onbeforeunload is more efficient because it does not run in competition with the actual closing of the window and is triggered before onunload I know Opera used to not acknowledge onbeforeunload – not sure if … Read more