react-dropzone

What is react-dropzone?

The react-dropzone npm package is a simple and highly customizable dropzone component for React applications. It allows users to drag and drop files into an area of a web page or click to select files through the file explorer. It is designed to provide developers with a flexible and easy-to-use interface for handling file uploads.

What are react-dropzone's main functionalities?

Basic File Drop

This feature allows users to create a basic dropzone area where files can be dragged and dropped or selected through a file dialog.

import React from 'react';
import { useDropzone } from 'react-dropzone';

function BasicDropzone() {
  const { getRootProps, getInputProps } = useDropzone();

  return (
    <div {...getRootProps()}>
      <input {...getInputProps()} />
      <p>Drag 'n' drop some files here, or click to select files</p>
    </div>
  );
}

export default BasicDropzone;

Accepting Specific File Types

This feature allows developers to specify which file types the dropzone will accept, limiting the user to only select or drag those types.

import React from 'react';
import { useDropzone } from 'react-dropzone';

function SpecificTypeDropzone() {
  const { getRootProps, getInputProps } = useDropzone({
    accept: 'image/*'
  });

  return (
    <div {...getRootProps()}>
      <input {...getInputProps()} />
      <p>Drag 'n' drop some images here, or click to select images</p>
    </div>
  );
}

export default SpecificTypeDropzone;

Styling Dropzone Based on Drag State

This feature allows developers to apply different styles to the dropzone depending on whether files are being dragged over it.

import React from 'react';
import { useDropzone } from 'react-dropzone';

function StyledDropzone() {
  const { getRootProps, getInputProps, isDragActive } = useDropzone();

  return (
    <div {...getRootProps()} style={{
      border: '2px dashed #eeeeee',
      backgroundColor: isDragActive ? '#e0e0e0' : '#fafafa',
      padding: '20px'
    }}>
      <input {...getInputProps()} />
      {
        isDragActive ?
          <p>Drop the files here ...</p> :
          <p>Drag 'n' drop some files here, or click to select files</p>
      }
    </div>
  );
}

export default StyledDropzone;

Handling File Previews

This feature allows developers to handle file previews by creating image thumbnails for dropped files.

import React, { useState } from 'react';
import { useDropzone } from 'react-dropzone';

function FilePreviewDropzone() {
  const [files, setFiles] = useState([]);
  const { getRootProps, getInputProps } = useDropzone({
    onDrop: acceptedFiles => {
      setFiles(acceptedFiles.map(file => Object.assign(file, {
        preview: URL.createObjectURL(file)
      })));
    }
  });

  const images = files.map(file => (
    <div key={file.name}>
      <img src={file.preview} style={{ width: '200px' }} alt='preview' />
    </div>
  ));

  return (
    <section className='container'>
      <div {...getRootProps()}>
        <input {...getInputProps()} />
        <p>Drag 'n' drop some files here, or click to select files</p>
      </div>
      <aside>
        <h4>Files</h4>
        {images}
      </aside>
    </section>
  );
}

export default FilePreviewDropzone;

Other packages similar to react-dropzone

dropzone

Dropzone is a standalone JavaScript library that provides drag-and-drop file uploads with image previews. It's more feature-rich out of the box compared to react-dropzone, but it's not a React component by default, which means it might require additional integration effort in React applications.

react-dropzone-uploader

React Dropzone Uploader is a React component that provides a dropzone as well as file previews and upload status. It offers more built-in features for handling uploads compared to react-dropzone, but it might be less flexible if you need to heavily customize the upload behavior.

filepond

FilePond is a flexible and fun JavaScript file upload library that can be turned into a React component using react-filepond. It provides a rich set of features like image optimization, file validation, and multiple file handling. It's a more comprehensive solution compared to react-dropzone but may be heavier if you only need a simple dropzone.

README

react-dropzone

Simple HTML5 drag-drop zone in React.js.

Usage

Simply require() the module and specify a handler property as a function that accepts the dropped file.

Optionally pass in a CSS size for the dropzone using the size property and a message to be shown inside the dropzone using the message property.

var Dropzone = require('react-dropzone');

var component = React.createClass({

  fileHandler: function(file) {
      uploadScript(file, uploadURL, function(err, res) {
        if (res.code == 200) {console.log("Upload success.")}
      });
    }
  },

  render: function() {
    return (
      <div>
        <Dropzone handler={this.fileHandler} size=200 message="Drag and drop a file here"/>
      </div>
    );
  }
});

If you'd like more customizability, you can specify children for the component and all the default styling will be overridden.

var Dropzone = require('react-dropzone');

var component = React.createClass({

  fileHandler: function(file) {
      this.setState({
        uploading: true
      });
      uploadScript(file, uploadURL, function(err, res) {
        if (res.code == 200) {console.log("Upload success.")}
      });
    }
  },

  render: function() {
    return (
      <div>
        <Dropzone handler={this.fileHandler}>
          <span>{this.state.uploading ? "Uploading... " : "Drop an image here."}</span>
        </Dropzone>
      </div>
    );
  }
});

Author

Param Aggarwal ([e-mail])

License

MIT