global-react-dropzone

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