Echarts饼图自定义tooltip

Echarts笔记1-饼图，自定义tooltip

tooltip: {
          trigger: "item",
          position: ["40%", "40%"],
          extraCssText: "width:180px;height:200px;overflow:auto;",
          enterable: true,
          formatter: (params) => {
            let res =
              "<div style='width:100%;text-align:center;'><span style='text-decoration: underline;'>" +
              params.name +
              "</span>明细数据</div><div style='width:100%;font-size: 12px;'><table style='width:100%;'>";
            for (let i in this.JiraPieTooltip[params.name]) {
              res +=
                "<tr><td>" +
                this.JiraPieTooltip[params.name][i].jiraid +
                "</td><td>" +
                this.JiraPieTooltip[params.name][i].ip +
                "</td></tr>";
              // console.log(this.JiraPieTooltip[params.name][i]);
              // console.log("-------------------")
            }
            res += "</table></div>";
            return res;
          }, //'{a} <br/>{b}: {c} ({d}%)',
        },