retina-dom-to-image/spec/resources/scale/style.css

A fork of the dom-to-image library that outputs an image for higher DPI screens

#dom-node {
    width: 100px;
    height: 100px;
    background-color: grey;
}

#child {
    height: 30px;
    width: 30px;
    background-color: lightgrey;
}