JSFiddle - React, Tailwind, and code Playground

by chovy

HTML

<select id="categories">
    <option value="a">A</option>
    <option value="b">B</option>
    <option value="c">C</option>
</select>

<select id="products">
</select>

JavaScript

$('#categories').change(function(e){
    var $targ = $(e.target);
    var selected_value = $targ.find('option:selected').val(); 
    
    $("#products").load('getpackage.php?id='+selected_value);
});