JSFiddle - React, Tailwind, and code Playground

HTML

<select id="woei" onchange="test();">
<option value="">--selecteer--</option>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>

JavaScript

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