生命周期

Vue3 setup 替代了 beforeCreate 和 created 两个生命周期

• 挂载
  • onBeforeMount
  • onMounted
• 更新
  • onBeforeUpdate
  • onUpdated
• 销毁
  • onBeforeUnmount
  • onUnmount

打印当前组件实例

<script setup lang="ts">
import {getCurrentInstance} from "vue"
const instace = getCurrentInstance();
console.log(instace);
</script>