浅谈Vue.js 关于页面加载完成后执行一个方法的问

<el-tabs v-model="initTab" type="card">
 <el-tab-pane label="1信息" name="tab1">
  1
 </el-tab-pane>
 <el-tab-pane label="2报告" name="tab2">
  2
 </el-tab-pane>
 <el-tab-pane label="3信息" name="tab3">
  3
 </el-tab-pane>
 <el-tab-pane label="4信息" name="tab4">
  <ziyemian-group @tabShow="tabShow" title="4信息" v-if="detailInfo">
  </ziyemian-group>
 
 </el-tab-pane>
 <el-tab-pane label="5信息" name="tab5">
  5
 </el-tab-pane>
 <el-tab-pane label="其它信息" name="tab6">
  6
 </el-tab-pane>
</el-tabs>
 
import ZiyemianGroup from './ZiyemianGroup.vue'
ponents: {
 ZiyemianGroup
},
data () {
  return {
    detailInfo: {}，
    initTab‘tab1'
  }
}
methods: {
 tabShow: (data) => {
  document.getElementsByClassName('el-tabs__item').item(4).style.display = data
 },
}

data () {
 return {
  list: []
 }
},
mounted () {
 this.init()
},
methods: {
 init() {
  if (list.length > 0) {
    this.$emit('whiteShow', 'inline')
  } else {
    this.$emit('whiteShow', 'none')
  }
 )
}

<el-tabs v-model="initTab" type="card">
 <el-tab-pane label="1信息" name="tab1">
  1
 </el-tab-pane>
 <el-tab-pane label="2报告" name="tab2">
  2
 </el-tab-pane>
 <el-tab-pane label="3信息" name="tab3">
  3
 </el-tab-pane>
 <el-tab-pane label="4信息" name="tab4">
  <ziyemian-group title="4信息" v-if="detailInfo">
  </ziyemian-group>
 
 </el-tab-pane>
 <el-tab-pane label="5信息" name="tab5">
  5
 </el-tab-pane>
 <el-tab-pane label="其它信息" name="tab6">
  6
 </el-tab-pane>
</el-tabs>
 
import ZiyemianGroup from './ZiyemianGroup.vue'
ponents: {
 ZiyemianGroup
},
data () {
  return {
    detailInfo: {}，
    initTab‘tab1'
  }
}
watch: {
 detailInfo: function () {
  this.$nextTick(function () {
   this.tabShow()
  })
 }
},
methods: {
  tabShow () {
    document.getElementsByClassName('el-tabs__item').item(6).style.display = 'none' // 隐藏tab6
  }
}