vue3中通过ref获取元素节点的实现

document.querySelector(选择器)
document.getElementById(id选择器)
document.getElementsByClassName(class选择器)

<template>
   <div ref='divDom'></div> 
</template>
<script setup>
import { ref} from 'vue'
const divDom = ref(null);
onMounted(()=>{
    console.log('获取dom元素',divDom)
})

<template>
   <div ref='getDivDom' v-for="item in list" :data-id="item.id"></div> 
</template>
<script setup>
import { ref} from 'vue'
const divDomList = ref(new Map());

const getDivDom = el=>{
    if(el){
        divDomList.set(el.dataset['id'],el) 
    }
}
// const el =divDomList.get(id) // 根据list数据中的id值 获取对应的dom元素 

<template>
   <swiper @swiper='getSwiper'></swiper > 
</template>
<script setup>
import swiper from 'swiper'
import { ref} from 'vue'
const swiperDom= ref(null);

const getSwiper= el=>{
    swiperDom.value = el;
}