JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myForm">

  <form action="#myForm" class="form-add" method="post">

    <br>

    <input type="text" class="address" name="naslov" placeholder="Naslov:">
    <b><input type="submit" name="submit" class="gumb" value="Potrdi"></b>
    <br>

  </form>
</div>