code: function shouldPreStyle(f) {
  
      var preStyle = false;
  
      // if we already tested for prestyling we don't have to do it again
      if (f.preStyleTestCompleted) {
        return false;
      }
  
      // should have an inline style, if not, apply
      if (!/inline-/.test(f.display)) {
        preStyle = true;
        f.display = 'inline-block';
      }
  
      // to correctly calculate dimensions the element should have whiteSpace set to nowrap
      if (f.whiteSpace !== 'nowrap') {
        preStyle = true;
        f.whiteSpace = 'nowrap';
      }
  
      // we don't have to do this twice
      f.preStyleTestCompleted = true;
  
      return preStyle;
    }
docs: determines if this fitty requires initial styling, can be prevented by applying correct styles through CSS