JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/dropzone/3.8.4/dropzone.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/dropzone/3.8.4/css/dropzone.css">
<div ng-app="dropzone" ng-controller="dropZoneCtrl">
<form action="/upload" 
    class="dropzone" 
    drop-zone 
    id="file-dropzone">
</form>
</div>

CSS

.dropzone,
.dropzone * {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
.dropzone {
  position: relative;
  min-height: 260px;
  border: 2px dashed rgba(0,0,0,0.3);
  -webkit-border-radius: 4px;
  border-radius: 4px;
  background: rgba(0,0,0,0.03);
  padding: 23px;
}
.dropzone.drag-hover {
  border-color: rgba(0,0,0,0.15);
  background: rgba(0,0,0,0.04);
}
.dropzone.drag-hover .message {
  opacity: 0.15;
  -ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=15);
  filter: alpha(opacity=15);
}
.dropzone.started .message {
  opacity: 0;
  -ms-filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=0);
  filter: alpha(opacity=0);
}
.dropzone .message {
  opacity: 1;
  -ms-filter: none;
  filter: none;
  -webkit-transition: opacity 0.3s ease-in-out;
  -moz-transition: opacity 0.3s ease-in-out;
  -o-transition: opacity 0.3s ease-in-out;
  -ms-transition: opacity 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out;
  background: url("http://dl.dropbox.com/u/1559658/dropzone/spritemap.png") no-repeat 0 -108px;
  position: absolute;
  width: 168px;
  height: 157px;
  margin-left: -84px;
  margin-top: -78.5px;
  top: 50%;
  left: 50%;
}
.dropzone .message span {
  display: none;
}
.dropzone.browser-not-supported {
  padding: 30px;
}
.dropzone.browser-not-supported .message {
  position: relative;
  background: url("http://dl.dropbox.com/u/1559658/dropzone/spritemap.png") no-repeat 0 0;
  width: 204px;
  height: 108px;
  top: 0;
  left: 0;
  margin-left: 0;
  margin-top: 0;
  margin-bottom: 20px;
}
.dropzone .preview {
  width: 100px;
  height: 136px;
  display: inline-block;
  margin: 18px;
  position: relative;
}
.dropzone .preview .details {
  width: 100px;
  height: 100px;
  position: relative;
}
.dropzone .preview .details img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
}
.dropzone .preview .details .size {
  color: #666;
  font: 500 31px/31px "League Gothic", sans-serif;
 ...

JavaScript

/**
 * An AngularJS directive for Dropzone.js, http://www.dropzonejs.com/
 * 
 * Usage:
 * 
 * <div ng-app="app" ng-controller="SomeCtrl">
 *   <button dropzone="dropzoneConfig">
 *     Drag and drop files here or click to upload
 *   </button>
 * </div>
 */
 
angular.module('dropzone', []).directive('dropzone', function () {
  return function (scope, element, attrs) {
    var config, dropzone;
 
    config = {
    'options': { // passed into the Dropzone constructor
      'url': '/upload'
    },
    'eventHandlers': {
      'sending': function (file, xhr, formData) {
      },
      'success': function (file, response) {
      }
    }
  };
 
    // create a Dropzone for the element with the given options
    dropzone = new Dropzone(element[0], config.options);
 
    // bind the given event handlers
    _.each(config.eventHandlers, function (handler, event) {
      dropzone.on(event, handler);
    });
  };
});
 
angular.module('app', ['dropzone']);
 
angular.module('app').controller('dropZoneCtrl', function ($scope) {
  $scope.dropzoneConfig = {
    'options': { // passed into the Dropzone constructor
      'url': 'upload.php'
    },
    'eventHandlers': {
      'sending': function (file,formData,xhr) {
      },
      'success': function (file, response) {
      }
    }
  };
});