tooltip在多种类图上无法分别显示echarts 折线配置项内容和展示

      myChart.setOption({
          grid: {
            top: '12%',
            bottom: '10%',
          },
          tooltip: {
            position: 'right',
            trigger: 'axis',
            backgroundColor: '#fff',
            borderColor: '#bdbdbd',
            borderWidth: 1,
            formatter: param => {
                return '2222'
            }
          },
          legend: {
            data: ['funding amount', 'projects number'],
          },
          xAxis: [
            {
              type: 'category',
              boundaryGap: true,
              data: this.xAxisData,
              axisLine: {
                lineStyle: {
                  color: '#a5c7ce',
                },
              },
              axisLabel: {
                fontSize: 14,
                fontWeight: 500,
                color: '#a5c7ce',
                interval: 0,
                align: 'center',
              },
              splitLine: {
                show: true,
                lineStyle: {
                  color: '#a5c7ce',
                  type: 'dotted',
                },
                interval: 3,
              },
              axisTick: {
                show: false,
              },
            },
          ],
          yAxis: [
            {
              name: 'funding amount',
              nameTextStyle: {
                color: '#8e908b',
              },
              splitLine: {
                show: false,
              },
              axisLine: {
                lineStyle: {
                  color: '#a5c7ce',
                },
              },
              axisTick: {
                show: false,
                alignWithLabel: true,
              },
              axisLabel: {
                color: '#8e908b',
              },
            },
            {
              name: 'projects number',
              nameTextStyle: {
                color: '#8e908b',
              },
              splitLine: {
                show: false,
              },
              axisLine: {
                show: false,
              },
              axisTick: {
                show: false,
                alignWithLabel: true,
              },
              axisLabel: {
                show: true,
                color: '#8e908b',
              },
            },
          ],
          series: [
            {
              name: 'projects number',
              type: 'line',
              showSymbol: false,
              symbolSize: 2,
              yAxisIndex: 1,
              lineStyle: {
                normal: {
                  color: '#2aafc7',
                  width: 2,
                },
              },
              itemStyle: {
                normal: {
                  color: '#2aafc7',
                },
              },
              areaStyle: {
                color: {
                  type: 'linear',
                  x: 0,
                  y: 0,
                  x2: 0,
                  y2: 1,
                  colorStops: [{
                    offset: 0,
                    color: 'rgba(228, 243, 245, 0)', // 0% 处的颜色
                  }, {
                    offset: 1,
                    color: '#edeced', // 100% 处的颜色
                  }],
                  globalCoord: false,
                },
              },
              data: [2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3],
            },
            {
              name: 'funding amount',
              type: 'bar',
              yAxisIndex: 0,
              animation: false,
              barWidth: 8,
              itemStyle: {
                normal: {
                  color: '#75bb00',
                },
              },
              emphasis: {
                itemStyle: {
                  color: '#54cce1',
                },
              },
              data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]
            },
          ],
        })
let clickIndex = null
myChart.on('click', function (param) {
    if (param.seriesIndex === 1) {
          if (!_.isNull(clickIndex) && clickIndex !== param.dataIndex) {
            
            myChart.dispatchAction({
              type: 'downplay',
              seriesIndex: 1,
              dataIndex: clickIndex,
            })
          }
          myChart.dispatchAction({
            type: 'highlight',
            seriesIndex: param.seriesIndex,
            dataIndex: param.dataIndex,
          })
          clickIndex = param.dataIndex
        }
});