基于Vue3文件拖拽上传功能实现

<template>
<div :class="['drag', { 'drag-active': active }]" ref="drag">
<p class="drag-title">未选择文件/文件夹</p>
<p class="drag-subtile">
支持拖拽到此区域上传，支持选择多个文件/文件夹
<br />
单个文件夹最大支持512GB
</p>
</div>
</template>
<script setup>
import { ref, onMounted, onBeforeUnmount } from 'vue'
const drag = ref(null)
const active = ref(false)
onMounted(() => {
drag.value.addEventListener('drop', handleDrop)
drag.value.addEventListener('dragleave', (e) => {
active.value = false
e.preventDefault()
})
drag.value.addEventListener('dragenter', (e) => {
active.value = true
e.preventDefault()
})
drag.value.addEventListener('dragover', (e) => {
active.value = true
e.preventDefault()
})
})
onBeforeUnmount(() => {
drag.value.removeEventListener('drop', handleDrop)
})
const emit = defineEmits(["file"])
const handleDrop = (e) => {
e.preventDefault()
active.value = false
emit("file", Array.from(e.dataTransfer.files))
}
</script>
<style lang="scss" scoped>
.drag {
height: 220px;
border: 1px dashed #DEDEDE;
border-radius: 4px;
display: flex;
align-items: center;
flex-direction: column;
justify-content: center;
&-active {
border: 1px dashed #2260FF;
}
&-title {
font-size: 14px;
}
&-subtile {
font-size: 12px;
color: #999999;
margin-top: 30px;
text-align: center;
line-height: unset;
}
}
</style>