JSFiddle - React, Tailwind, and code Playground

HTML

<select id="woei" onchange="test();">
<option>--selecteer--</option>
<option value="aVal">aText</option>
<option value="bVal">bText</option>
<option value="cVal">cText</option>
</select>

JavaScript

function test()
{
    alert($('#woei option:selected').text());
   alert($('#woei option:selected').val());
}