JSFiddle - React, Tailwind, and code Playground
HTML
<select id="mySelect" onchange="myFunction()">
<option value="Audi">Audi
<option value="BMW">BMW
<option value="Mercedes">Mercedes
<option value="Volvo">Volvo
</select>
<div id="div">
</div>
JavaScript
function myFunction() {
var x = document.getElementById("mySelect").value;
document.getElementById("div").innerHTML = "You selected: " + x;
}