JSFiddle - React, Tailwind, and code Playground
HTML
<input class="main" name="Package" type="checkbox" id="Package" />
<input class="submain" name="Package" type="checkbox" id="Package" />
<input class="submain" name="Package" type="checkbox" id="Package" />
<input class="submain"name="Package" type="checkbox" id="Package" />
JavaScript
$(document).ready(function(){
$('.main').click(
function(){
$(".submain").toggle();
});
});