JSFiddle - React, Tailwind, and code Playground

HTML

<div id="column">
            <div id="header">
                <heading1>Header.</heading1>
            </div>

            <div id="menu">
                <a href="Home.html"><menu-element class="chosen"> Home page</menu-element></a>
                <a href="Project.html"><menu-element>Project</menu-element></a>
                <a href="Gallery.html">
                    <menu-element> Gallery
                        <ul>
                            <li>1</li>
                            <li>2</li>
                        </ul>
                    </menu-element>
                </a>

            </div>

CSS

menu-element ul
{
    display: none;
}