JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div>Does not align middle</div>
    <div class="align-middle">This one does</div>
</body>

CSS

div {
    background-color: #ABABAB;
    padding: 5px;
    height: 200px;
    width: 300px;
    margin-bottom: 5px;
}

.align-middle {
    display: table-cell;
    vertical-align: middle;
}