Js $(window). Width

Code:

<head>
        <meta charset="UTF-8">
        <title></title>
        <script src="js/jquery.min.js"></script>
        <script src="js/shutter.js"></script>
        <script src="js/velocity.js"></script>
        <link rel="stylesheet" href="css/shutter.css">
        <link rel="stylesheet" type="text/css" href="css/index.css" />
        <script>
            $(function() {
                console.log($(window).width());
                $(".shutter").shutter({
                    shutterW: $(window).width,
                    shutterH: 440, // 
                    isAutoPlay: true, // 
                    playInterval: 3000, // 
                    curDisplay: 0, // 
                    fullPage: false // 
                });
                console.log($(window).width());
            });
        </script>
    </head>

print:

clipboard.png
print differently before and after.
my code is run on the server.

if I open this page directly and don"t run it on the server, I get 1343. Why is this happening?

Mar.10,2021

Scroll bar occupies 17

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