echarts自定义提示框悬浮文字

  tooltip: {
        trigger: 'axis',
        axisPointer: {
          type: 'cross'
        },
        formatter: function(list) {
          var msg = list[0].name + "
";
          for (let i in list) {
            if (list[i].componentIndex == "0") {
              msg += list[i].marker+ "配额盈缺量    " + (list[i].data) + "
";
            }
            if (list[i].componentIndex == "1") {
              msg += list[i].marker+ "配额盈缺率    " + (list[i].data) + "%
";
            }
          }
          return msg;
        }
      },

或者用list[i].componentSubType == "line"来判断