JSFiddle - React, Tailwind, and code Playground

HTML

<div class="imageContainer2"></div>

CSS

body, html{
  height:100%;
  margin: 0px;
}

.imageContainer2 {
  background-image: url("http://www.wallpaperawesome.com/wallpapers-awesome/wallpapers-full-hd-1080-x-1920-smatphone-htc-one-lumia-1520-lg-g2-galaxy-s4-s5-awesome/wallpaper-full-hd-1080-x-1920-smartphone-vertical-stiped-nebula.jpg");
  background-position: center top;
  background-size: 100% auto;
}

.imageContainer2 {
  position: fixed;
  width: 100%;
  height: 100%;
}