Untitled

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

<input id="elem" class="www zzz">
<script>
    let elem = document.querySelector('#elem');
    let class = elem.getAttribute('class');

    console.log(class);
</script>
</body>
</html>