JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
<div class="button">
  Some text
</div>
<div class="button">
  Some text that is very long indeed
</div>
</div>

CSS

.button {
  flex: 1 1 0;
  border: 1px solid red;
}

.container {
  display: inline-flex;
}