JSFiddle - React, Tailwind, and code Playground

HTML

<select>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>


</head>


<body>


<select>
    <option value="foo">foo</option>
    <option value="bar">bar</option>
</select>    

<div></div>



</body>
</html>

CSS

div{
    font-size: 30px;
}

JavaScript

<script>

var select = document.querySelector("select");
var div = document.querySelector("div");

select.onchange = function(e){
    alert(this.value);
    div.innerText = this.value;
};

</script>