JSFiddle - React, Tailwind, and code Playground

by lindychen

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <select id="country">
      <option value="" disabled="disabled" selected="selected">PLEASE CHOOSE</option>
      <option value="USA">USA</option>
      <option value="UK">UK</option>
      <option value="IT">ITALY</option>
    </select>
    <div id="states">states</div>

JavaScript

$(document).ready(function() {
      $('#country').on('change.states', function() {
        $("#states").toggle($(this).val() == 'USA');
      }).trigger('change.states');
    });