dom-to-image/spec/resources/fonts/web-fonts/embedded.css

Generates an image from a DOM node using HTML5 canvas and SVG

@font-face {
    font-family: 'Font1';
    src: url("data:application/x-font-woff2;base64,AAA") format("woff2"), local(Arial);
    font-weight: normal;
    font-style: normal;
}