JSFiddle - React, Tailwind, and code Playground

HTML

<select id="drop1">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

<select id="drop2">
 
</select>

JavaScript

$(document).ready(function(){
    $("#drop2").attr("disabled", true);
    $("#drop1").change(function(){
        $("#drop2").attr("disabled", false);
        $("#drop2").append(new Option("option text", "value"));
        $("#drop2").append(new Option("xxx","1"));        
    });
});