JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>
        <a>Open</a>
        <div>
            The big Content
        </div>
    </li>
    
    <li>
        <a>Open</a>
        <div>
            The big Content
        </div>
    </li>
    
    <li>
        <a>Open</a>
        <div>
            The big Content
        </div>
    </li>
</ul>

CSS

div { display: none; background: #000; height: 50px; width: 200px; }

JavaScript

$("a").click(function() {
    $("div").slideUp();
    $(this).parent().children("div").slideDown();
});