code: function (fontName) {
      var testFontName = fontName === 'Comic Sans MS' ? 'Courier New' : 'Comic Sans MS';
      var $tester = $('<div>').css({
        position: 'absolute',
        left: '-9999px',
        top: '-9999px',
        fontSize: '200px'
      }).text('mmmmmmmmmwwwwwww').appendTo(document.body);
  
      var originalWidth = $tester.css('fontFamily', testFontName).width();
      var width = $tester.css('fontFamily', fontName + ',' + testFontName).width();
  
      $tester.remove();
  
      return originalWidth !== width;
    }
docs: returns whether font is installed or not.
  
  @param {String} fontName
  @return {Boolean}