描述:当前是关于Echarts图表中的 饼图 示例。
 
            const color = ['#ffdc2b', '#4d8cfd', '#45e6de'];
      const datas = [
        {
          name: '服务业企业',
          value: 25,
        },
        {
          name: '批发零售企业',
          value: 75,
        },
        {
          name: '住宿餐饮企业',
          value: 75,
        },
      ];
      let sum = 0;
      for (var i of datas) {
        sum += i.value;
      }
      const title = {
        name: '企业总数',
        value: sum,
        unit: '家',
      };
      const rich = {
        name: {
          color: '#DEDEDE',
          fontSize: 16,
          align: 'left',
          padding: [0, 10, 20, 0],
        },
        name1: {
          color: '#DEDEDE',
          fontSize: 16,
          align: 'left',
          padding: [0, 0, 0, 10],
        },
        value: {
          color: '#ccc',
          fontSize: 14,
          align: 'left',
        },
        title: {
          color: '#fff',
          fontSize: 17,
        },
        titleUnit: {
          color: '#fff',
          fontSize: 16,
          padding: [15, 0, 0, 0],
        },
        titleValue: {
          color: '#fff',
          fontSize: 40,
          fontWeight: 600,
          padding: [15, 5, 5, 5],
        },
      };
      let option = {
        color,
        backgroundColor: '#000E1A',
        legend: {
          orient: 'vertical',
          icon: 'circle',
          x: '55%',
          y: 'center',
          itemWidth: 12,
          itemHeight: 12,
          itemGap: 20,
          width: '263',
          align: 'left',
          textStyle: {
            color: '#D7E5FF',
            rich,
          },
          formatter: function (name) {
            debugger;
            let res = datas.filter(v => v.name === name)
            let str = ''
            str = '{name1|' + res[0].name + '}{name1|' + res[0].value + '家}'
            return str
          },
        },

        series: [
          {
            type: 'pie',
            center: ['30%', '50%'],
            radius: ['40%', '50%'],
            data: datas,
            startAngle: 180,
            label: {
              show: false,
            },
          },
          {
            type: 'pie',
            center: ['30%', '50%'],
            radius: ['40%', '50%'],
            data: datas,
            startAngle: 180,
            label: {
              show: true,
              position: 'center',
              formatter: () => `{title|${title.name}}\n{titleValue|${title.value}}{titleUnit|${title.unit}}`,
              rich,
            },
          },
        ],
      };