Run
<!DOCTYPE html> <html> <body> <p> click on "create btn" for creating HTML button </p> <button onclick="create_b()">create btn</button> <script> function create_b() { let btn = document.createElement("button"); btn.innerHTML = "Submit"; btn.id="buttonID"; btn.type="submit"; btn.name="formsubmit"; document.body.appendChild(btn); } </script> </body> </html>