JSFiddle - React, Tailwind, and code Playground

HTML

<header>
  header
</header>
<main>
  content
</main>
<footer>
  footer
</footer>

CSS

* {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex-grow: 1;
}