react-dropzone

Simple HTML5 drag-drop zone for files with React.js.

Try it out here: http://okonet.ru/react-dropzone/

Installation

The easiest way to use react-dropzone is to install it from npm and include it in your React build process (using Webpack, Browserify, etc).

npm install --save react-dropzone

Create a standalone module using WebPack:

> npm install
> webpack

React 0.13 users

Vesion 3.x is not compatible with React 0.13. If you can't upgrade to React 0.14 right now, you should use v 2.x of this package.

npm install --save react-dropzone@2.x

Usage

Simply require('react-dropzone') and specify an onDrop method that accepts an array of dropped files.

By default, the component picks up some default styling to get you started. You can customize <Dropzone> by specifying a style and activeStyle which is applied when a file is dragged over the zone. You can also specify className and activeClassName if you would rather style using CSS.

Example

/** @jsx React.DOM */
var React = require('react');
var Dropzone = require('react-dropzone');

var DropzoneDemo = React.createClass({
    onDrop: function (files) {
      console.log('Received files: ', files);
    },

    render: function () {
      return (
          <div>
            <Dropzone onDrop={this.onDrop}>
              <div>Try dropping some files here, or click to select files to upload.</div>
            </Dropzone>
          </div>
      );
    }
});

React.render(<DropzoneDemo />, document.body);

Features

disableClick - Clicking the <Dropzone> brings up the browser file picker. To disable, set to true.
multiple - To accept only a single file, set this to false.
accept - Filters the file types that are valid. It should have a valid MIME type according to input element, for example:
- application/pdf
- image/*
- audio/aiff,audio/midi

To show a preview of the dropped file while it uploads, use the file.preview property. Use <img src={file.preview} /> to display a preview of the image dropped. You can disable the creation of the preview (for example if you drop big files) by setting the disablePreview prop to true.

Manual Upload

To trigger the dropzone manually (open the file prompt), call the component's open function.
The completion handler for the open function is also the onDrop function.

/** @jsx React.DOM */
var React = require('react');
var Dropzone = require('react-dropzone');

var DropzoneDemo = React.createClass({
    getInitialState: function () {
        return {
          files: []
        };
    },

    onDrop: function (files) {
      this.setState({
        files: files
      });
    },

    onOpenClick: function () {
      this.refs.dropzone.open();
    },

    render: function () {
        return (
            <div>
                <Dropzone ref="dropzone" onDrop={this.onDrop}>
                    <div>Try dropping some files here, or click to select files to upload.</div>
                </Dropzone>
                <button type="button" onClick={this.onOpenClick}>
                    Open Dropzone
                </button>
                {this.state.files.length > 0 ? <div>
                <h2>Uploading {this.state.files.length} files...</h2>
                <div>{this.state.files.map((file) => <img src={file.preview} /> )}</div>
                </div> : null}
            </div>
        );
    }
});

React.render(<DropzoneDemo />, document.body);

Uploads

Using react-dropzone is similar to using a file form field, but instead of getting the files property from the field, you listen to the onDrop callback to handle the files. Simple explanation here: http://abandon.ie/notebook/simple-file-uploads-using-jquery-ajax

Specifying the onDrop method, provides you with an array of Files which you can then send to a server. For example, with SuperAgent as a http/ajax library:

    onDrop: function(files){
        var req = request.post('/upload');
        files.forEach((file)=> {
            req.attach(file.name, file);
        });
        req.end(callback);
    }

License

MIT

juneidy/react-dropzone