![]() ![]() It may still be possible in IE (at least pre-Edge). If you click on this the window will be closed after 1000msĪs far as I can tell, it no longer is possible in Chrome or FireFox. I believe IE will ask the user for confirmation. Firefox disallows you from closing other windows. If you opened the window with Javascript (via window.open()) then you are allowed to close the window with javascript. Note: there is browser-specific differences with the above. If you really want Yes and No you'll need to create some kind of modal Javascript dialog box. Now the options on the nfirm() dialog box will be OK and Cancel (not Yes and No). Otherwise the browser will attempt to go to that URL (which it obviously isn't). You return false here to prevent the default behavior for the event. That being said, in most cases, this would suffice.You will need Javascript to do this. Even though we have placed extra measures to ensure accurate results, there is still a possibility that we might miss it. We say probably in the third point because our bottleneck is the client’s hardware performance. ![]() ![]() If the tab count is decreased AND the storage time difference is less than 50ms, the user probably closed the browser.If the tab count is decreased, the user closed a tab.If navigation entries have reload navigation type, the user reloaded the page.Conclusionīased on what we saw so far, we can boil our detection method to 3 points: In case of really poor client hardware performance, the worst-case scenario is that every beforeunload event would be detected as a tab close. This little trick also reduces the probability that we will miss the browser close event due to the client’s poor hardware performance. Angular Example for beforeunload event handler ) beforeunloadHandler(event): void However, for most of the applications, we need to distinguish between a ‘close’ (tab or window) and a ‘reload’. It is enough if you are looking for just that. This means this event will be triggered whenever the user either reloads the page, closes the tab or the browser window. This event is called whenever the resources are removed/unloaded from the client. JavaScript provides an event handler called beforeunload. If you are using another framework or JavaScript in general, the syntax would vary but the theory remains the same. The examples I will be showing below are using Angular 10. In this article, you will learn a way to detect page reload, tab close and browser close actions effectively and also distinguish between them. I was surprised to find that there is no straightforward way to do so. In JavaScript/TypeScript, however, there is no direct/standard way to identify whether the user has closed a tab and/or the browser window. It could be clearing cookies or sending an API call. Sometimes, you need to do something right before the user closes a tab. ![]()
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