vue 進入頁面與離開頁面觸發事件

1.切換進入當前路由之前的鈎子函數 beforeRouteEnter

<script>
export default {
  beforeRouteEnter(to, form, next) {
    next()
  }
}
</script>

　　2.離開當前路由之前的鈎子函數 beforeRouteLeave

<script>
export default {
  beforeRouteLeave(to, form, next) {
    next()
  }
}
</script>