JSFiddle - React, Tailwind, and code Playground

HTML

<select class='target'>
    <option>test1</option>
    <option>test2</option>
    <option>test3</option>
</select>
<div class="tooltip"></div>

CSS

.tooltip {
    position:absolute;
    left:20%;
    top:0;
    min-height:10px;
    width:45%;
    border:1px solid grey;
}

JavaScript

$('.target').change(function(){
    $('.tooltip').text($(this).val());
});