echarts自定义legend内容

效果

---

配置

let chartData = [{
    value: 6.33,
    name: "公共安全支出：",
  },
  {
    value: 7.12,
    name: "教育支出：",
  },
  {
    value: 8.34,
    name: "科学技术支出：",
  },
  {
    value: 3.54,
    name: "社会保障和就业支出：",
  },
  {
    value: 3.54,
    name: "卫生健康支出：",
  },
  {
    value: 3.54,
    name: "城乡社区支出：",
  },
  {
    value: 3.54,
    name: "节能环保支出：",
  },
  {
    value: 3.54,
    name: "其他：",
  },
];
let pieChartOption = {
  orient: "vertical",
  title: {
    text: "一般公共服务支出构成",
    top: 25,
    left: "center",
    textStyle: {
      color: "#fff",
      fontSize: 16,
    },
  },
  tooltip: {
    trigger: "axis",
    axisPointer: {
      type: "cross",
      crossStyle: {
        color: "#999",
      },
    },
  },
  legend: {
    top: 80,
    left: 213,
    icon: "circle",
    itemWidth: 12, // 设置宽度
    itemHeight: 12, // 设置高度
    formatter: (name) => {
      const data = chartData;
      let total = 0;
      let target;
      for (let i = 0, l = data.length; i < l; i++) {
        total += data[i].value;
        if (data[i].name == name) {
          target = data[i].value;
        }
      }
      const percent = ((target / total) * 100).toFixed(2);
      return `${name}${target}亿元，占比${percent}%`;
    },
    textStyle: {
      color: "#C5F6FF",
    },
  },
  series: [{
    type: "pie",
    center: [107, 172],
    radius: "50%",
    data: chartData,
    label: {
      show: false,
      position: "inside",
      // formatter: "{b}：{d}%",
      formatter: "{d}%",
      color: "#fff",
    },
    color: [
      "#3DCDE9",
      "#3B7CFF",
      "#059B53",
      "#27D17C",
      "#21FCCA",
      "#B1FFED",
    ],
  }],
}