JSFiddle - React, Tailwind, and code Playground

HTML

<div class="full-background">
</div>

CSS

.full-background {
  background: url('http://7-themes.com/data_images/out/16/6822804-landscape.jpg') center center no-repeat;
  background-size: cover;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}