JSFiddle - React, Tailwind, and code Playground

HTML

<div class="relativediv">
  <p>
    Make me vertical alignment as center
  </p>
</div>

CSS

.relativediv {
  position: relative;
  border: 1px solid #ddd;
  height: 300px;
  width: 300px
}

.relativediv p {
  position: absolute;top:50%;
  transfrom: translateY(-50%);
}