JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script>
function teste()
{
  var form = new FormData();
  form.append('user',$("#user").val());
  form.append('password',$("#password").val());

  var data = JSON.stringify( $(form).serialize() );
  console.log(data);
}


</script>

  <input id='user' placeholder='user' value='etaeta'><br>
  <input id='password' type='password' placeholder='password' value='aaaaaaaa'><br>
  <button onclick="teste()" >Try</button>