CSS Check Mark

by bizamajig

HTML

<script src="http://modernizr.com/downloads/modernizr-2.5.3.js"></script>
<div></div>

CSS

div { 
    background: red; 
    width: 100px; 
    height: 100px; 
    color: #fff; 
    text-align: center; 
}
div:after { 
    content: "\2718"; 
    font-size: 60px; 
}
.csstransitionspseudos div {
    background: green;
}
.csstransitionspseudos div:after {
    content: "\2714";
}