problem description
el-tab automatic cycle switch display
the environmental background of the problems and what methods you have tried
related codes
 / / Please paste the code text below (do not replace the code with pictures) 
 < template > 
<div class="groupChart">
    <el-tabs type="border-card" v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="AAA" name="first" :key=""first"">
            <span v-if="isUpdate1">AAA</span>
        </el-tab-pane>
        <el-tab-pane label="BBB" name="second" :key=""second"">
            <span v-if="isUpdate2">BBB</span>
        </el-tab-pane>
    </el-tabs>
</div>
< / template >
< script >
export default {
  name: "tabCircle",
  data () {
    return {
      activeName: "first",
      isUpdate1: true,
      isUpdate2: false,
      cir: null
    }
  },
  methods: {
    handleClick (tab) {
      if (tab.name === "first") {
        this.isUpdate1 = true
        this.isUpdate2 = false
      } else if (tab.name === "second") {
        this.isUpdate1 = false
        this.isUpdate2 = true
      }
    }
  },
  mounted () {
    let count = 0
    clearInterval(this.cir)
    this.cir = setInterval(function () {
      let arr = ["first", "second"]
      // let count = 0
      console.log(count, "00000")
      this.handleClick(arr[count])
      countPP
      if (count > arr.length-1) {
        count = 0
      }
    }.bind(this), 5000)
  }
}
< / script >
what result do you expect? What is the error message actually seen?
can automatically switch tab to display the corresponding content
