富文本在移动端的显示，px替换为rem

          var data = res.data
          var content = data.content
          if (content !== '') {
            // 替换富文本为rem
            content = data.content.replace(/(\d+)px/g, function(s, t) {
                s = s.replace('px', '');
                var value = parseInt(s) * 0.01; // 100px = 1rem
                return value + "rem";
            });
          }