JSFiddle - React, Tailwind, and code Playground

HTML

<select id="example">
    <option id="one">one</option>
    <option id="two">two</option>
    <option id="three">three</option>
    <option id="four" value="4">four</option>
</select>
<div id="show">lala</div>

CSS

#show{display:none;}

JavaScript

$(document).ready(function() {
  $("select#example").on('change', function () {
		if ($(this).val() == 4) {
    	
    }
    console.log($(this).val());
  });
});