CodePen

HTML

            
              

<body>

<div id="wrapper">

</div>



</body>

            
          
!
via HTML Inspector

CSS

            
              html, body {
  height:100%;
  
}
#wrapper {
	height:100%;
	background-image:url(http://lorempixel.com/output/city-q-c-640-480-8.jpg);
	background-repeat:no-repeat;
	background-size:cover;

}
            
          
!
? ?
? ?
Must be a valid URL.
+ add another resource
via CSS Lint

JS

            
              
            
          
!
Must be a valid URL.
+ add another resource
via JS Hint
Loading ..................