Untitled

<!DOCTYPE HTML>
<html>
<head>
    <meta charset="utf-8">
    <title>parentNode</title>

</head>
<body>
<header> <div> <p> <span id="elem"></span> </p> </div>
</header>


<script>

    const findParentTag = (el, tag) => {
        while (el.parentNode) {
            el = el.parentNode;
            if (el.tagName.toLowerCase() === tag) {
                return el;
            }
        }
        return null;
    }

    const element = document.getElementById('elem');

    console.log(findParentTag(element, 'div').getAttribute('id'))

</script>
</body>
</html>