三、饼图

1、普通饼图

const option = {
    tooltip: {
      trigger: 'item'
    },
    title: {
      text: "物流公司货运效率",
      right: "5%",
      top: "5%",
      textStyle: {
        color: "white"
      }
    },
    legend: {
      top: '5%',
      left: '5%',
      orient: "vertical",
      textStyle: {
        color: "white"
      },
    },
    series: [
      {
        type: 'pie',
        avoidLabelOverlap: false,
        itemStyle: {
          // borderRadius: 10,
          borderColor: '#fff',
          borderWidth: 2,
        },

        label: {
          show: false,
          position: 'center'
        },
        emphasis: {
          label: {
            show: true,
            fontSize: 20,
            fontWeight: 'bold'
          }
        },
        labelLine: {
          show: false
        },
        data: res
      }
    ]
  };