Get the base64 version of a Google Font

google-font.js

const googlefontcssmerge = require('googlefontcssmerge');
const googlefontcss64 = require('googlefontcss64');
const css = require('css');

const url = `http://fonts.googleapis.com/css?family=Open+Sans`;

googlefontcssmerge(url, function(error, style) {
  if (error) throw error;

  googlefontcss64(style, function(error, style) {
    if (error) throw error;

    console.log(css.stringify(style));
  });
});