Vue3中获取DOM元素的几种方式总结

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;
}

<template>
  <div class="box" ref="boxRef">
    box
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue';

const boxRef = ref<HTMLElement>() // 这里定义一个和div中ref名字一样的变量名即可

onMounted(() => {
  if (boxRef.value) {
    console.log(boxRef.value)
  }
})
</script>

<template>
  <div class="box">
    <div v-for="item in 10" :key="item" :ref="setBoxRef">
      box
    </div>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue';

const boxRefs = ref<HTMLElement[]>([])
const setBoxRef = (el: any) => {
  if (el) {
    boxRefs.value.push(el)
  }
}

onMounted(() => {
  console.log(boxRefs.value)
})
</script>

<template>
  <div class="box" ref="boxRef">
    <div ref="boxInnerRef">
      <div ref="innerRef">
        innerRef
      </div>
    </div>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, getCurrentInstance } from 'vue';
onMounted(() => {
  const instance = getCurrentInstance()
  if (instance) {
    console.log(instance.refs)
  }
})
</script>