JSFiddle - React, Tailwind, and code Playground

HTML

<div class="background-image">
    <img src="http://www.hdpaperz.com/wallpaper/original/windows-8-wallpapers-2560x1600-2311_1.jpg" width="100%" height="100%"/>
    </div>

CSS

.background-image {
      background: no-repeat center center fixed; 
      background-size: cover;
      display: block;
      left: -5px;
      top:-5px;
      bottom:-5px;
      position: fixed;
      right: -5px;
      z-index: 1;
      -webkit-filter: blur(5px);
      -moz-filter: blur(5px);
      -o-filter: blur(5px);
      -ms-filter: blur(5px);
      filter: blur(5px);
      -webkit-background-size: cover;
      -moz-background-size: cover;
      -o-background-size: cover;
      margin:-5px;
    
     }