Listen to Post action

I am writing a plugin that adds a custom metabox to the post page. I would like to trigger an event when the user navigates away from the edit post page or when a user stops editing a specific post. Is there a way to listen to events on the post page?

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This is more of a JavaScript the A WordPress Question but anyway, You can use the JavaScript onbeforeunload event something like:

<script type="text/javascript">
    old = window.onbeforeunload;
    window.onbeforeunload = MyOnExit;
    function MyOnExit(){
        //do your stuff here
        return old();
    }
</script>    

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