useDropZone 
ファイルをドロップできる領域を作成します。
デモ 
ドロップゾーンにファイルをドロップ
 PNG
PNG一般的なドロップゾーン
isOverDropZone: false
画像ドロップゾーン
isOverDropZone: false
使い方 
vue
<script setup lang="ts">
import { useDropZone } from '@vueuse/core'
const dropZoneRef = ref<HTMLDivElement>()
function onDrop(files: File[] | null) {
  // called when files are dropped on zone
}
const { isOverDropZone } = useDropZone(dropZoneRef, {
  onDrop,
  // specify the types of data to be received.
  dataTypes: ['image/jpeg'],
  // control multi-file drop
  multiple: true,
  // whether to prevent default behavior for unhandled events
  preventDefaultForUnhandled: false,
})
</script>
<template>
  <div ref="dropZoneRef">
    Drop files here
  </div>
</template>型定義 
typescript
export interface UseDropZoneReturn {
  files: Ref<File[] | null>
  isOverDropZone: Ref<boolean>
}
export interface UseDropZoneOptions {
  /**
   * Allowed data types, if not set, all data types are allowed.
   * Also can be a function to check the data types.
   */
  dataTypes?: MaybeRef<string[]> | ((types: readonly string[]) => boolean)
  onDrop?: (files: File[] | null, event: DragEvent) => void
  onEnter?: (files: File[] | null, event: DragEvent) => void
  onLeave?: (files: File[] | null, event: DragEvent) => void
  onOver?: (files: File[] | null, event: DragEvent) => void
  /**
   * Allow multiple files to be dropped. Defaults to true.
   */
  multiple?: boolean
  /**
   * Prevent default behavior for unhandled events. Defaults to false.
   */
  preventDefaultForUnhandled?: boolean
}
export declare function useDropZone(
  target: MaybeRefOrGetter<HTMLElement | null | undefined>,
  options?: UseDropZoneOptions | UseDropZoneOptions["onDrop"],
): UseDropZoneReturn