JSFiddle - React, Tailwind, and code Playground

HTML

<div id="BD">
    <div id="content">
        
    </div>
</div>

CSS

#BD {
    position: relative;
}
#BD:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url(http://placehold.it/300);
    opacity: .7;
}
#content {
    height: 300px;
}