interview/dom.html

<!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>
    <style>
        .spans {
            display: flex;
            flex-direction: row;
        }

        .spans>span {
            border: 1px solid red;
            height: 40px;
            width: 40px;
        }

        .spans>span.dotted {
            border: 1px dotted blue;
        }
    </style>
</head>

<body>
    <button>click me</button>
    <div id="spans" class="spans">
        <span>1</span>
        <span class="dotted">2</span>
        <span>3</span>
        <span>4</span>
        <span>5</span>
    </div>


    <script>
        const btn = document.querySelector("button");
        btn.addEventListener('click', () => {
            const spans = document.querySelector('#spans')

            const spansArray = Array.from(spans.querySelectorAll('span'));
            spansArray.reverse().forEach(element => {
                spans.appendChild(element);
            });

        })
    </script>
</body>

</html>