code: function(arr) {
          var ret = [];
          arr.forEach(function(it) {
            if (it.indexOf('//') > -1) {
              ret.push(it);
            } else {
              const aaa = (new Function('return ' + it))();
              ret.push(JSON.stringify((new Function('return ' + it))()));
            }
          });
          return this.highlight(ret.join('\n'), 'js');
        }
docs: 显示 mock 结果