dropzone

What is dropzone?

Dropzone is a JavaScript library that provides drag-and-drop file uploads with image previews. It is highly customizable and easy to integrate into web applications.

What are dropzone's main functionalities?

Basic File Upload

This code demonstrates how to create a basic Dropzone instance for file uploads. It specifies the URL to which files will be uploaded, the parameter name for the file, the maximum file size, and the accepted file types.

const Dropzone = require('dropzone');

// Create a Dropzone instance
const myDropzone = new Dropzone('#my-dropzone', {
  url: '/file/post',
  paramName: 'file',
  maxFilesize: 2, // MB
  acceptedFiles: '.jpeg,.jpg,.png,.gif'
});

Custom Preview Template

This code demonstrates how to create a Dropzone instance with a custom preview template. The template defines the HTML structure for the file preview, including elements for the thumbnail, file name, file size, progress bar, and error/success messages.

const Dropzone = require('dropzone');

// Custom preview template
const previewTemplate = `
  <div class="dz-preview dz-file-preview">
    <div class="dz-image"><img data-dz-thumbnail /></div>
    <div class="dz-details">
      <div class="dz-size"><span data-dz-size></span></div>
      <div class="dz-filename"><span data-dz-name></span></div>
    </div>
    <div class="dz-progress"><span class="dz-upload" data-dz-uploadprogress></span></div>
    <div class="dz-error-message"><span data-dz-errormessage></span></div>
    <div class="dz-success-mark"><span>✔</span></div>
    <div class="dz-error-mark"><span>✘</span></div>
  </div>
`;

// Create a Dropzone instance with custom preview template
const myDropzone = new Dropzone('#my-dropzone', {
  url: '/file/post',
  previewTemplate: previewTemplate
});

Event Handling

This code demonstrates how to handle various events in Dropzone. It shows how to log messages when a file is added, track the upload progress, and handle successful uploads.

const Dropzone = require('dropzone');

// Create a Dropzone instance
const myDropzone = new Dropzone('#my-dropzone', {
  url: '/file/post'
});

// Event handling
myDropzone.on('addedfile', function(file) {
  console.log('File added:', file.name);
});

myDropzone.on('uploadprogress', function(file, progress) {
  console.log('Upload progress:', progress);
});

myDropzone.on('success', function(file, response) {
  console.log('File uploaded successfully:', response);
});

Other packages similar to dropzone

react-dropzone

React Dropzone is a simple React component for creating a file dropzone. It provides a flexible and customizable way to handle file uploads in React applications. Compared to Dropzone, it is specifically designed for React and offers a more seamless integration with React's component-based architecture.

fine-uploader

Fine Uploader is a JavaScript library for file uploads that supports multiple file selection, drag-and-drop, and image previews. It offers a wide range of customization options and supports various back-end technologies. Compared to Dropzone, Fine Uploader provides more advanced features and greater flexibility but may require more configuration.

uppy

Uppy is a modular file uploader for web applications. It supports drag-and-drop, file previews, and resumable uploads. Uppy is highly customizable and can be extended with various plugins. Compared to Dropzone, Uppy offers a more modern and modular approach to file uploads, making it suitable for complex use cases.

README

Version 3.8.1

Dropzone.js is a light weight JavaScript library that turns an HTML element into a dropzone. This means that a user can drag and drop a file onto it, and the file gets uploaded to the server via AJAX.

Please read the contributing guidelines before you start working on Dropzone!

Starting with version 2.0.0 this library does no longer depend on jQuery (but it still works as a jQuery module).

It is written as a component but there's a standalone version, and an AMD module that's compatible with RequireJS in the downloads folder.

Master

Main features

• Image thumbnail previews. Simply register the callback thumbnail(file, data) and display the image wherever you like
• Multiple files and synchronous uploads
• Progress updates
• Support for large files
• Well tested

Documentation

For the full documentation and installation please visit www.dropzonejs.com

Please also refer to the FAQ.

Examples

For examples, please see the GitHub wiki.

Usage

Implicit creation:

<form id="my-awesome-dropzone" action="/target" class="dropzone"></form>

That's it. Really!

Dropzone will automatically attach to it, and handle file drops.

Want more control? You can configure dropzones like this:

// "myAwesomeDropzone" is the camelized version of the ID of your HTML element
Dropzone.options.myAwesomeDropzone = { maxFilesize: 1 };

...or instantiate dropzone manually like this:

new Dropzone("div#my-dropzone", { /* options */ });

Note that dropzones don't have to be forms. But if you choose another element you have to pass the url parameter in the options.

For configuration options please look at the documentation on the website or at the source.

Register for events

I use emitter to manage events. If you want to register to some event you can do so on the dropzone object itself:

Dropzone.options.myDropzone({
  init: function() {
    this.on("error", function(file, message) { alert(message); });
  }
});
// or if you need to access a Dropzone somewhere else:
var myDropzone = Dropzone.forElement("div#my-dropzone");
myDropzone.on("error", function(file, message) { alert(message); });

For a list of all events, please look at the chapter »listen to events« in the documentation or at the source.

Browser support

• Chrome 7+
• Firefox 4+
• IE 10+
• Opera 12+ (Version 12 for MacOS is disabled because their API is buggy)
• Safari 6+

For all the other browsers, dropzone provides an oldschool file input fallback.

Why another library?

I realize that there are already other libraries out there but the reason I decided to write my own are the following:

• I didn't want it to be too big, and to cumbersome to dive into.
• I want to design my own elements. I only want to register callbacks so I can update my elements accordingly.
• Big files should get uploaded without a problem.
• I wanted a callback for image previews, that don't kill the browser if too many too big images are viewed.
• I want to use the latest API of browsers. I don't care if it falls back to the normal upload form if the browser is too old.
• I don't think that it's necessary anymore to depend on libraries such as jQuery (especially when providing functionality that isn't available in old browsers anyway).

Other projects

You might also be interested in my open source tooltip library Opentip.

License

(The MIT License)

Copyright (c) 2012 Matias Meno <[e-mail]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.