echarts如何优化数据视图dataView中的样式（代码示例）

toolbox:{
   show: true,
  feature: {
     dataView: {
         show: true,
         title: '数据视图',
         optionToContent: function (opt) {
         var axisData = opt.xAxis[0].data;
         var series = opt.series;
         var tdHeads = '<td  style="padding:0 10px">名称</td>';
         series.forEach(function (item) {
         tdHeads += '<td style="padding: 0 10px">'+item.name+'</td>';
         });
         var table = '<table border="1" style="margin-left:20px;border-collapse:collapse;font-size:14px;text-align:center"><tbody><tr>'+tdHeads+'</tr>';
         var tdBodys = '';
         for (var i = 0, l = axisData.length; i < l; i++) {
         for (var j = 0; j < series.length; j++) {
         if(typeof(series[j].data[i]) == 'object'){
         tdBodys += '<td>'+series[j].data[i].value+'</td>';
         }else{
             tdBodys += '<td>'+ series[j].data[i]+'</td>';
            }
        }
        table += '<tr><td style="padding: 0 10px">'+axisData[i]+'</td>'+ tdBodys +'</tr>';
        tdBodys = '';
       }
       table += '</tbody></table>';
       return table;
      }
    },
    mark: {show:true},
    restore:{show:true},
   magicType: {type: ['line', 'bar','pie']},
   saveAsImage:{show:true}
        }
    }