vue 强制组件重新渲染(重置)的两种方案

<template>
 <third-p v-if="reFresh"/>
</template>
 
<script>
 export default{
 data(){
  return {
  reFresh:true,
  menuTree:[]
  }
 },
 watch:{
  menuTree(){
 
   this.reFresh= false
   this.$nextTick(()=>{
   
   this.reFresh = true
  })
  }
 }
}
</script>

<template>
 <third-p :key="menuKey"/>
</template>
 
<script>
 export default{
 data(){
  return {
  menuKey:1
  }
 },
 watch:{
  menuTree(){
 
  ++this.menuKey
  }
 }
}
</script>