এইচটিএমএল onsubmit

<!DOCTYPE html>
<html>
<body>

<form onsubmit="submitForm(event)">
  <input placeholder="নাম">
  <button>সাবমিট</button>
</form>

<p id="message"></p>

<script>
function submitForm(event) {
  event.preventDefault();
  document.getElementById("message").innerHTML = "ফর্ম জমা দেওয়া হয়েছে";
}
</script>

</body>
</html>