JQuery file drop

Easy to use and unopinionated file drag and drop jquery plugin with graceful degradation

Requirements

• JQuery 1.8.x or higher

Recommended

• JQuery-remote-js-scope

Note

It is recommended to use the unobtrusive driver for this plugin (behavior-file-drop-container-ujs)

Install

Using Bower

bower install jquery-file-drop --save

Using Bundler

source 'https://rails-assets.org' do
	gem 'rails-assets-jquery-file-drop'
end

Setup with server side JS responses

Define the form

HTML

Just wrap the file input in a container

file: form.html

<form action="/events" method="post" role="form">
    <h1>Create event</h1>
    <div class="form-group">
        <label for="event_name">Name: </label>
        <input name="event[name]" type="text" class="form-control" id="event_name">
    </div>
    <div class="form-group">
        <label for="event_date">Date:</label>
        <input name="event[data]" type="date" class="form-control" id="event_date">
    </div>
    <div class="form-group">
        <label for="event_images">Images: </label>
        <div id="js-file-drop-container">
            <div class="row" id="files"></div>
            <div class="row">
                <h1 class="info">Drop files here or click to upload</h1>
            </div>
            <input name="event[images][]" type="file" id="event_images" multiple="true" accept="image/*" />
        </div>
    </div>
    <input name="authenticity_token" type="hidden" value="J7CBxfHalt49OSHp27hblqK20c9PgwJ108nDHX/8Cts=" />
    <button type="submit" class="btn btn-default">Submit</button>
</form>

JS

Initialize the file drop container with the upload url (required) and info url (optional)

file: app.js

$('#js-file-drop-container').fileDropContainer({
	url: '/events/new/upload',
	info: {
		url: '/events/new/upload/info'
	}
})

Upload JS response

• Retrieve the uploaded files like you would with a normal form (params, $_FILES, etc.) with the input name
• Render a JS response (content type: application/javascript) to add HTML for the files that have been uploaded

Info JS response

• Retrieve the files like you would with a normal form (params, $_POST/$_GET, etc.) with the input name
• Render a JS response (content type: application/javascript) to add HTML for the files that are currently uploading

Available infos for each file:

• name
• size
• type
• last_modified

Note: You can use jquery-remote-js-scope to access files and upload request in the remote JS response to generate a thumbnail with data URI (base64) for example.

Options

Default options

{ 
	contentType: 'multipart/form-data; charset=UTF-8',
    method: 'post',
    processData: false,
    tokenName: 'authenticity_token',
    info: {
        method: 'post',
        scope: {},
        scopeOnly: false
    }
}

Options are passed to jQuery ajax method, so it is possible to use options listed in the documentation.

• Base level: Ajax options for the upload request
• Nested in the info key: Ajax options for the info request

Documentation for the scope options is available here.

Setup without server side JS responses

The following events are triggered on the drop container to allow a client side view implementation

Events

• files:upload parameters: files and uploadRequest
• files:deny parameter : deniedFiles

Request

Upload events

• ajax:beforeSend
• ajax:success
• ajax:complete
• ajax:error

Info events

• info:ajax:beforeSend
• info:ajax:success
• info:ajax:complete
• info:ajax:error

Events signatures documentated here: jQuery-ujs documentation

##Demo

View demo with adapter

##TODO

• Make a "Wow !" demo