JSFiddle - React, Tailwind, and code Playground

HTML

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

JavaScript

function test()
{
    // return value        
    alert("value: " + $('#woei').val() + " | size: " + $('#woei').size());

}