vue3 生命周期

与 2.x 版本生命周期相对应的组合式 API

beforeCreate -> 使用 setup()
created -> 使用 setup()
beforeMount -> onBeforeMount
mounted -> onMounted
beforeUpdate -> onBeforeUpdate
updated -> onUpdated
beforeDestroy -> onBeforeUnmount
destroyed -> onUnmounted
errorCaptured -> onErrorCaptured

使用

	import {
   onBeforeMount,onMounted } from 'vue'
	
	//在组件被挂载之前调用
	onBeforeMount(()=>{
   
	   console.log('组件被挂载之前')
	})
	//在组件被挂载之后调用
	onMounted(() => {
   
	   console.log('在组件被挂载之后')
	});