JSFiddle - React, Tailwind, and code Playground

HTML

<select name="users" onchange="showUser(this)">
<option value="">Select a person:</option>
<option value="1"> Option1 </option>
<option value="2"> Option2 </option>
<option value="3"> Option3 </option>
<option value="4"> Option4 </option>
</select>

JavaScript

function showUser(obj){
   alert(obj.options[obj.selectedIndex].innerHTML);
}