JSFiddle - React, Tailwind, and code Playground
HTML
<button class="heading">A</button>
<div class="miniC">Text</div>
<div class="miniI">Text 2</div>
JavaScript
$(".miniC").css("display", "none");
$(".miniI").css("display", "none");
$(".heading").click(function () {
$(".miniC").slideToggle();
$(".miniI").slideToggle();
});