JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="chk1" />

CSS

input[type=checkbox]:before {
    content: "";
display: inline-block;
width: 12px;
height: 12px;
background-image: url('http://www.jpl.nasa.gov/spaceimages/images/mediumsize/PIA17011_ip.jpg');
background-size: 12px;
top: 2px;
position: absolute;
    opacity:0.4;
    
}