Web OTP API demo

<input type="text" inputmode="numeric" autocomplete="one-time-code" />
<script>
if ('OTPCredential' in window) {
  window.addEventListener('DOMContentLoaded', e => {
    const input = document.querySelector('input[autocomplete="one-time-code"]');
    
    navigator.credentials.get({
      otp: {transport:['sms']}
    }).then(otp => input.value = otp.code);
  });
}
</script>