1-week-sunday-lesson/windowAddEvent.html at master · K128-Mersin-JavaScript-React-Bootcamp/1-week-sunday-lesson · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <span id="windowSize"></span>
    <span id="offline"></span>

    <script>
        window.addEventListener('resize', handleResize);

        function handleResize() {
            document.getElementById('windowSize').innerText = `Current window size: ${window.innerWidth}`;
        }


        // window.addEventListener('offline', function () {
        //     document.getElementById('offline').innerText = `You are offline`;

        // })


        window.removeEventListener('resize', handleResize);


    window.addEventListener("beforeunload", function(event) {
        event.returnValue = "Write something clever here..";
    });
    </script>

</body>
</html>