puter.ui.onWindowClose()GUI

Specify a function to execute when the window is about to close. For example the provided function will run right after the 'X' button of the window has been pressed.

Note onWindowClose is not called when app is closed using puter.exit().

Syntax 

puter.ui.onWindowClose(handler)

Parameters

handler (Function)

A function to execute when the window is going to close.

Examples 

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ui.onWindowClose(function(){
            alert('Window is about to close!')
            puter.exit();
        })
    </script>
</body>
</html>

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