JSFiddle - React, Tailwind, and code Playground

HTML

<div id="background">
    <img src="http://www.hollywoodreporter.com/sites/default/files/2012/12/img_logo_blue.jpg" class="stretch" alt="" />
</div>

CSS

#background {
    width: 100%; 
    height: 100%; 
    left: 0px; 
    top: 0px; 
}

.stretch {
    width:100%;
    height:100%;
}