JSFiddle - React, Tailwind, and code Playground

CSS

html { 
  background: url(http://upload.wikimedia.org/wikipedia/commons/2/26/YellowLabradorLooking_new.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}