option = {
  tooltip: {
    trigger: 'axis',
    axisPointer: {
      type: 'cross',
      crossStyle: {
        color: '#999'
      }
    },
    formatter: function(params) {
              // params 是一個(gè)數(shù)組，包含了每個(gè)數(shù)據(jù)項(xiàng)的信息
              var result = `<div style="width: 402px;font-family: PingFang SC, PingFang SC-Regular;backdrop-filter: blur(20px);">
                <div class="top" style="margin-top:14px;margin-left:20px">
                  <div class="tl" style="width: 50px;font-size: 18px;margin-bottom: 4px;margin-right: 200px;">里程：${params[0].data.b}(km)</div>
                  <div class="tr" style="width: 50px;font-size: 18px;margin-bottom: 4px;">速度：${params[0].data.a}(km/h)</div>
                  <div class="tr" style="width: 50px;font-size: 18px;margin-bottom: 4px;">速度：${params[0].data.value}(km/h)</div>
                </div>
              </div>`;
              return result;
            },
  },
  toolbox: {
    feature: {
      dataView: { show: true, readOnly: false },
      magicType: { show: true, type: ['line', 'bar'] },
      restore: { show: true },
      saveAsImage: { show: true }
    }
  },
  legend: {
    data: ['Precipitation', 'Temperature']
  },
  xAxis: [
    {
      type: 'category',
      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      axisPointer: {
        type: 'shadow'
      }
    }
  ],
  yAxis: [
    {
      type: 'value',
      name: 'Precipitation',
      min: 0,
      max: 250,
      interval: 50,
      axisLabel: {
        formatter: '{value} ml'
      }
    },
  ],
  series: [
    {
      name: 'Precipitation',
      type: 'bar',
      tooltip: {
        valueFormatter: function (value) {
          return value + ' ml';
        }
      },
      data: [
      {value:44, a:2, b:3},{value:33, a:2, b:3},{value:22, a:2, b:3},{value:66, a:2, b:3},{value:23, a:2, b:3},{value:23, a:2, b:3},{value:23, a:2, b:3}
      ],
    },
  ]
};