<head><style> *{font-size: clamp(3vw, 13px, 8vw);}</style></head> <button type="button" onclick="skriv()">Skriv in</button>
<div></div>

<script>
const skriv = () =>{
document.getElementsByTagName("div")[0].innerHTML += "FIRUZ NABIEV";
}
</script>