CodePen

HTML

            
              <div> </div>
            
          
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CSS

            
              @import "compass/css3";

html, body {
   height: 100%;
   div {
    background-color: red;
    width: 5em;
    min-height: 100%;
  }
}
            
          
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JavaScript

            
              
            
          
!
999px
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