JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

<button>test</button>
<button>test 2</button>
<button>test 3</button>
<input type="text" value="hello" />

</div>

CSS

.container {
  height:2em;
}

.container > * {
  height:100%;
  display:inline-flex;
  vertical-align: top;
  justify-content: center;
  align-items: center;
}