JSFiddle - React, Tailwind, and code Playground

HTML

<select name="user_type" id="user_type">
    <option value="select" selected="selected">Please Choose An Option</option>
    <option value="PRIVATE OWNER">PRIVATE OWNER</option>
    <option value="TRADER">TRADER</option>
</select>

<select name="package_type" id="package_type">
    <option value="">Please Choose An Option</option>
    <option value="SINGLE ENTRY">SINGLE ENTRY</option>
    <option value="FEATURED ENTRY">FEATURED ENTRY</option>
    <option value="STANDARD">STANDARD</option>
    <option value="ULTIMATE">ULTIMATE</option>
</select>

JavaScript

$('#user_type').change(function(){
    // detach all options
    $('#package_type option').detach();
    // if value is '' then append the default - else append the correct options
   // alert($("#user_type :selected"). val());
    if($("#user_type :selected"). val()=="select"){
    $('#package_type').attr("disabled", false);
    }else{
     $('#package_type').attr("disabled", true);
    }
    
});