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index.ts
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index.ts
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import { ref } from 'vue-demi'
import type { Ref } from 'vue-demi'
import type { MaybeRefOrGetter } from '@vueuse/shared'
import { isClient } from '@vueuse/shared'
import { useEventListener } from '../useEventListener'
export interface UseDropZoneReturn {
isOverDropZone: Ref<boolean>
}
export function useDropZone(
target: MaybeRefOrGetter<HTMLElement | null | undefined>,
onDrop?: (files: File[] | null) => void,
): UseDropZoneReturn {
const isOverDropZone = ref(false)
let counter = 0
if (isClient) {
useEventListener<DragEvent>(target, 'dragenter', (event) => {
event.preventDefault()
counter += 1
isOverDropZone.value = true
})
useEventListener<DragEvent>(target, 'dragover', (event) => {
event.preventDefault()
})
useEventListener<DragEvent>(target, 'dragleave', (event) => {
event.preventDefault()
counter -= 1
if (counter === 0)
isOverDropZone.value = false
})
useEventListener<DragEvent>(target, 'drop', (event) => {
event.preventDefault()
counter = 0
isOverDropZone.value = false
const files = Array.from(event.dataTransfer?.files ?? [])
onDrop?.(files.length === 0 ? null : files)
})
}
return {
isOverDropZone,
}
}