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Editorial Team
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Asked: 2026-05-23T00:43:31+00:00

This is a general question with no attempt so far since I don’t know

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This is a general question with no attempt so far since I don’t know where to start. All I’ve seen are javascript alerts upon leaving a page.

Scenario:

  • When User1 visit a page I want to generate a random string and make an entry in the database for that string.

  • This random number can be entered by one other user (User2).

  • I will check that the random number has an entry in the database before allowing User2 to “proceed”

When User1 leaves the page, I want to remove the entry from the database, so that if User2 enters the random string, it won’t be present in the database any longer/ won’t be valid anymore.

How do I trigger an event to delete the row upon leaving the page?

Not sure how else to describe this — if I’m making this more difficult than it needs to be or I’m just approaching the problem wrong, please point me in the right direction as to how to pull this off.

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1 Answer

  1. Editorial Team

    Perhaps someone can prove me wrong, but as far as I know there isn’t a reliable way of triggering a server-side event when users leave a page.

    Yes, there is the onunload event that you can use to trigger a quick ajax call, but HTTP is by definition a stateless protocol and attempting to create a solution which emulate a stateful connection will have flaws. Consider:

    • users terminating the browser process instead of simply leaving the page
    • browsers with javascript disabled

    From your scenario, I suspect that you might be approaching your problem from a wrong angle. Do give more details on what you’re trying to achieve and someone might be able to help.

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