JSFiddle - React, Tailwind, and code Playground

HTML

<div id="open_tab">Click</div>
<div id="tab">TOGGLE</div>

CSS

#tab {
    background: red;
}

#open_tab {
    background: blue;
}

#tab, #open_tab {
    height: 100px;
}

JavaScript

$("#tab").hide();
$("#open_tab").on("click", function () {
    $("#tab").toggle();
});