Membuat tombol



<!DOCTYPE html>
<html>
<body>

<p id="demo">Klik tombol dibawah ini</p>

<script>
function myFunction() {
      var x = document.getElementById("demo");
      x.style.fontSize = "25px";
      x.style.color = "red";
}
</script>

<button onclick="myFunction()">klik disini !</button>

</body>
</html>

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