<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div>
        <div id="text">Tekst her</div>
        <button onclick="change()">Trykk her</button>
        Vis dyr: <input id="showAnimal" onchange="show()"></button>
        <div id="show"></div>
    </div>
    <script>
        function change() {
            let animalList = ["hund", "katt", "esel"];
            let animal = animalList[Math.floor(Math.random() * animalList.length)];
            document.getElementById('text').innerHTML = `${animal}`;
        }
        function show(){
            let animal = document.getElementById('showAnimal').value;
            document.getElementById('show').innerHTML = `${animal}`;
        }
    </script>
</body>

</html>