JSFiddle - React, Tailwind, and code Playground

by Osama Qassar

HTML

<div class="menu">Menu Item
    <ul>
        <li>Dropdown 1</li>
        <li>Dropdown 2</li>
        <li>Dropdown 3</li>
        <li>Dropdown 4</li>
        <li>Dropdown 5</li>
    </ul>
</div>

CSS

.menu ul {
    height: 0px;
    overflow: hidden;
    -webkit-transition: all 0.5s ease-in-out;
    -moz-transition: all 0.5s ease-in-out;
    -o-transition: all 0.5s ease-in-out;
    transition: all 0.5s ease-in-out;
}

.menu:hover ul {
    height: 150px;
}