docs: function remToPx(remArray) {
  
          var pxArray = remArray.map(function(v) {
            if (regexCalc.test(v)) {
              return v;
            } else if (regexRem.test(v)) {
  
              // this one is needed to split properties like '2rem/1.5'
              var restValue = '';
              if (/\//.test(v)) {
                restValue = v.match(/\/.*/);
              }
  
              // replace 'rem' and anything that comes after it, we'll repair this later
              var unitlessValue = v.replace(/rem.*/, '');
              var pxValue = preciseRound(unitlessValue * rootSize) + 'px';
              var newValue = restValue ? pxValue + restValue : pxValue;
  
              remFound++;
              return newValue;
            }
            return v;
          }).join(' ');
  
          return pxArray;
        }