JSFiddle - React, Tailwind, and code Playground

HTML

<div id="pnlSalas">Panel</div>
<p class="a">p</p>

CSS

#pnlSalas, .a {
    padding: 20px;
    border: 1px solid black;
}

JavaScript

$(document).ready(function () {
    $("#pnlSalas").toggle();
    $('.a').click(function () {
        $("#pnlSalas").toggle();
    });
});