1、引入

javascript">import { nextTick } from 'vue'

2、具体使用，配合异步

javascript">setup() {const message = ref('Hello!')const changeMessage = async newMessage => {message.value = newMessageawait nextTick()console.log('Now DOM is updated')}}

3、具体使用，普通
方法里：

javascript"> setup () {    let otherParam = reactive({showA:false})nextTick(()=>{otherParam.showA = true})return {otherParam}}