font-roboto.js

if (!window.polymerSkipLoadingFontRoboto) {
  const font = 'https://fonts.googleapis.com/css?family=Roboto+Mono:400,700|Roboto:400,300,300italic,400italic,500,500italic,700,700italic';
  const link = document.createElement('link');
  link.rel = 'stylesheet';
  link.type = 'text/css';
  link.crossOrigin = 'anonymous';
  link.href = font;
  document.head.appendChild(link);
}