JSFiddle - React, Tailwind, and code Playground

HTML

<div class="headerAndButton">
    <h3 class="h3">
        Click the button to the right
        <button>click me</button>
    </h3>
</div>

SCSS

.headerAndButton {
  border:1px solid black;
  height:200px;
  display : table-cell;
  vertical-align: middle;

  h3 {
    min-height: 31px;
    vertical-align: middle;
  }
}