JSFiddle - React, Tailwind, and code Playground

HTML

<form id="option1" class="group">
    form 1<br>
    <input value="form1 asas"><br>
      <input value="form1 dsdsd"></form>

    <form id="option2" class="group">
        form 2<br>
        <input value="form2 sasa"><br>
        <input value="form2 fgfgfg">
     </form>
 <br><br>           
<select id="choseForm">
    <option value="option1">Form1</option>
    <option value="option2">Form2</option>
</select>

JavaScript

$(document).ready(function () {
    $('.group').hide();
    $('#option1').show();
    $('#choseForm').change(function () {
        $('.group').hide();
        $('#'+$(this).val()).show();
    })
});