@molecule/app-file-dropzone-react

Auto-generated, AI-first package reference for the molecule.dev ecosystem. It is written to be read by coding agents as much as by people, and is generated from this package's source — edit src/index.ts JSDoc, not this file.

File dropzone — drag-drop + click-to-browse file picker with accept / max-size filtering. Pure UI: it emits the chosen File[] and the host app performs the actual upload.

Exports <FileDropzone> and its FileDropzoneProps.

Quick Start

import { FileDropzone } from '@molecule/app-file-dropzone-react'

function AvatarUpload() {
  return (
    <FileDropzone
      accept="image/*"
      multiple={false}
      maxSize={5 * 1024 * 1024}
      onFiles={(files) => uploadAvatar(files[0])}
      onRejected={(files) => showError(files[0].name)}
    />
  )
}

Type

feature

Installation

npm install @molecule/app-file-dropzone-react @molecule/app-react @molecule/app-ui @molecule/app-ui-react react
npm install -D @types/react

API

Interfaces

`FileDropzoneProps`

Props for {@link FileDropzone}.

interface FileDropzoneProps {
  /** Called with the File[] the user selected or dropped. */
  onFiles: (files: File[]) => void
  /** Accept attribute (e.g. `'image/*'` or `'.pdf,.docx'`). */
  accept?: string
  /** Allow multi-file selection. Defaults to false. */
  multiple?: boolean
  /** Max file size in bytes. Files exceeding are rejected. */
  maxSize?: number
  /** Called with rejected files (wrong type or size). */
  onRejected?: (files: File[]) => void
  /** Optional content rendered inside the dropzone (defaults to standard upload copy). */
  children?: ReactNode
  /** Disabled state. */
  disabled?: boolean
  /** Extra classes on the dropzone wrapper. */
  className?: string
}

Functions

`FileDropzone(props)`

Drag-drop + click-to-browse file upload zone. Pure UI — apps handle the actual upload.

Rejects files exceeding maxSize or not matching accept (best-effort extension/MIME check) via onRejected.

function FileDropzone({
  onFiles,
  accept,
  multiple = false,
  maxSize,
  onRejected,
  children,
  disabled,
  className,
}: FileDropzoneProps): JSX.Element

props — Component props (see {@link FileDropzoneProps}).

Injection Notes

Requirements

Peer dependencies:

@molecule/app-react ^1.0.1
@molecule/app-ui ^1.0.1
@molecule/app-ui-react ^1.0.1
react ^18.0.0 || ^19.0.0

Runtime Dependencies

@molecule/app-react
@molecule/app-ui
@molecule/app-ui-react
react

With multiple={false} (the default) only the FIRST accepted file is delivered to onFiles, even when the user drops several at once.

The accept filter is a best-effort client-side check (file extension or MIME prefix match) — treat it as UX sugar and always re-validate on the server. Files failing accept or maxSize go to onRejected (both rejection causes arrive in the same callback).

Pass children to replace the default "Drop files here or click to browse" copy; the default copy translates via @molecule/app-locales-file-dropzone.

The zone is a keyboard-activatable role="button" (tabIndex={0}): pressing Enter or Space opens the native file dialog, matching a click.

Translations

Translation strings are provided by @molecule/app-locales-file-dropzone.

`@molecule/app-file-dropzone-react`

How it works

Reference