echarts饼图只展示和提示一个数据

使用场景：一般使用饼图会有两个数据，且两个数据鼠标指着会有相应的提示，以下的使用场景是展示车辆的出租率，只需要百分比这一个数，且另外个数的tooltip也需要隐藏

<template>
  <div ref="rentout" class="rentout">
  </div>
</template>
<script setup lang="ts">
import { onMounted, ref, computed } from "vue";
import * as echarts from "echarts";
import { reqMonthRentalRate } from '/@/api/echarts/echarts'
import { useRouter, useRoute } from 'vue-router'
const router = useRouter()
const route = useRoute()
const rentout = ref()
// 获取的月出租率
const finallyData = ref()
// 其他
const others = computed(() => {
  return 1 - finallyData.value
})
onMounted(
  async () => {
    await getMonthRentalRate()
    await init()
  },
)

const getMonthRentalRate = async () => {
  let result = await reqMonthRentalRate()

  // 保留两位小数
  finallyData.value = Math.round(result.slice(-1)[0].rentalRate * 100) / 100
}
const transformFontSize = (fontsize) => {
  // 获取屏幕可视区宽度
  const width = document.body.clientWidth
  const ratio = width / 1920

  // 取下整
  return fontsize * ratio
}

const init = () => {
  var myChart = echarts.init(rentout.value);
  let option = {
    name: '出租',
    tooltip: {
      trigger: 'item',
      formatter: "{b} :  {d}%"
    },
    series: [
      {
        name: '出租',
        type: 'pie',
        radius: ['65%', '80%'],
        color: ["#0e587e", "#fdaf46"],
        label: {
          normal: {
            position: 'inner',
            show: false,
          }
        },
        data: [
          { name: '其他', value: others.value },
          { name: '出租率', value: finallyData.value, selected: true, label: { show: true, fontSize: transformFontSize(20), position: 'center', } },
        ],
        itemStyle: {
          normal: {
            label: {
              show: true,
              position: 'center',
              //formatter: '{b} : {c} ({d}%)' //带当前图例名 + 百分比
              formatter: '{d}%\n{b}',//只要百分比
              fontSize: transformFontSize(20),
              color: '#fdaf46',
            },
            labelLine: { show: true }
          }
        },
        tooltip: {//出租率才提示
          formatter(params) { //格式化鼠标移上去显示内容样式
            if (params.name == '出租率') {
              return params.name + params.percent + '%';
            }

          },
        },

      }
    ]
  }
  window.onresize = function () { myChart.resize(); }
  myChart.setOption(option);
}
</script>