Asen


<!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>
    <button onclick="show()">Покажи</button>
    <h4 class="demo">Топли напитки</h4>
    <h4 class="demo"></h4>

</body>
<script>
    var hotdrinks = ["кафе", "чай", "капучино", "лате", "мляко"]
    var text = document.getElementsByClassName("demo")[1];

    function show(){
        hotdrinks.push("3в1")
        hotdrinks.forEach(element => {
            text.innerHTML += element + " * ";
        });
        console.log("test");
    }
</script>
</html>