another bulk of composer updates

(cherry picked from commit 6685381fd8db507493c3d7c1793f8c05c681bbce)

1 files changed, 1554 insertions, 1478 deletions

diff --git a/vendor/blueimp/jquery-file-upload/js/jquery.fileupload.js b/vendor/blueimp/jquery-file-upload/js/jquery.fileupload.js
index 53c169e2a..d4d32570c 100644
--- a/vendor/blueimp/jquery-file-upload/js/jquery.fileupload.js
+++ b/vendor/blueimp/jquery-file-upload/js/jquery.fileupload.js
@@ -9,1527 +9,1603 @@
  * https://opensource.org/licenses/MIT
  */
 
-/* jshint nomen:false */
-/* global define, require, window, document, location, Blob, FormData */
-
-;(function (factory) {
-    'use strict';
-    if (typeof define === 'function' && define.amd) {
-        // Register as an anonymous AMD module:
-        define([
-            'jquery',
-            'jquery-ui/ui/widget'
-        ], factory);
-    } else if (typeof exports === 'object') {
-        // Node/CommonJS:
-        factory(
-            require('jquery'),
-            require('./vendor/jquery.ui.widget')
-        );
-    } else {
-        // Browser globals:
-        factory(window.jQuery);
-    }
-}(function ($) {
-    'use strict';
-
-    // Detect file input support, based on
-    // http://viljamis.com/blog/2012/file-upload-support-on-mobile/
-    $.support.fileInput = !(new RegExp(
-        // Handle devices which give false positives for the feature detection:
-        '(Android (1\\.[0156]|2\\.[01]))' +
-            '|(Windows Phone (OS 7|8\\.0))|(XBLWP)|(ZuneWP)|(WPDesktop)' +
-            '|(w(eb)?OSBrowser)|(webOS)' +
-            '|(Kindle/(1\\.0|2\\.[05]|3\\.0))'
+/* global define, require */
+/* eslint-disable new-cap */
+
+(function(factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery', 'jquery-ui/ui/widget'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'), require('./vendor/jquery.ui.widget'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function($) {
+  'use strict';
+
+  // Detect file input support, based on
+  // https://viljamis.com/2012/file-upload-support-on-mobile/
+  $.support.fileInput = !(
+    new RegExp(
+      // Handle devices which give false positives for the feature detection:
+      '(Android (1\\.[0156]|2\\.[01]))' +
+        '|(Windows Phone (OS 7|8\\.0))|(XBLWP)|(ZuneWP)|(WPDesktop)' +
+        '|(w(eb)?OSBrowser)|(webOS)' +
+        '|(Kindle/(1\\.0|2\\.[05]|3\\.0))'
     ).test(window.navigator.userAgent) ||
-        // Feature detection for all other devices:
-        $('<input type="file"/>').prop('disabled'));
-
-    // The FileReader API is not actually used, but works as feature detection,
-    // as some Safari versions (5?) support XHR file uploads via the FormData API,
-    // but not non-multipart XHR file uploads.
-    // window.XMLHttpRequestUpload is not available on IE10, so we check for
-    // window.ProgressEvent instead to detect XHR2 file upload capability:
-    $.support.xhrFileUpload = !!(window.ProgressEvent && window.FileReader);
-    $.support.xhrFormDataFileUpload = !!window.FormData;
-
-    // Detect support for Blob slicing (required for chunked uploads):
-    $.support.blobSlice = window.Blob && (Blob.prototype.slice ||
-        Blob.prototype.webkitSlice || Blob.prototype.mozSlice);
-
-    // Helper function to create drag handlers for dragover/dragenter/dragleave:
-    function getDragHandler(type) {
-        var isDragOver = type === 'dragover';
-        return function (e) {
-            e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
-            var dataTransfer = e.dataTransfer;
-            if (dataTransfer && $.inArray('Files', dataTransfer.types) !== -1 &&
-                    this._trigger(
-                        type,
-                        $.Event(type, {delegatedEvent: e})
-                    ) !== false) {
-                e.preventDefault();
-                if (isDragOver) {
-                    dataTransfer.dropEffect = 'copy';
-                }
-            }
-        };
-    }
+    // Feature detection for all other devices:
+    $('<input type="file"/>').prop('disabled')
+  );
+
+  // The FileReader API is not actually used, but works as feature detection,
+  // as some Safari versions (5?) support XHR file uploads via the FormData API,
+  // but not non-multipart XHR file uploads.
+  // window.XMLHttpRequestUpload is not available on IE10, so we check for
+  // window.ProgressEvent instead to detect XHR2 file upload capability:
+  $.support.xhrFileUpload = !!(window.ProgressEvent && window.FileReader);
+  $.support.xhrFormDataFileUpload = !!window.FormData;
+
+  // Detect support for Blob slicing (required for chunked uploads):
+  $.support.blobSlice =
+    window.Blob &&
+    (Blob.prototype.slice ||
+      Blob.prototype.webkitSlice ||
+      Blob.prototype.mozSlice);
+
+  /**
+   * Helper function to create drag handlers for dragover/dragenter/dragleave
+   *
+   * @param {string} type Event type
+   * @returns {Function} Drag handler
+   */
+  function getDragHandler(type) {
+    var isDragOver = type === 'dragover';
+    return function(e) {
+      e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
+      var dataTransfer = e.dataTransfer;
+      if (
+        dataTransfer &&
+        $.inArray('Files', dataTransfer.types) !== -1 &&
+        this._trigger(type, $.Event(type, { delegatedEvent: e })) !== false
+      ) {
+        e.preventDefault();
+        if (isDragOver) {
+          dataTransfer.dropEffect = 'copy';
+        }
+      }
+    };
+  }
+
+  // The fileupload widget listens for change events on file input fields defined
+  // via fileInput setting and paste or drop events of the given dropZone.
+  // In addition to the default jQuery Widget methods, the fileupload widget
+  // exposes the "add" and "send" methods, to add or directly send files using
+  // the fileupload API.
+  // By default, files added via file input selection, paste, drag & drop or
+  // "add" method are uploaded immediately, but it is possible to override
+  // the "add" callback option to queue file uploads.
+  $.widget('blueimp.fileupload', {
+    options: {
+      // The drop target element(s), by the default the complete document.
+      // Set to null to disable drag & drop support:
+      dropZone: $(document),
+      // The paste target element(s), by the default undefined.
+      // Set to a DOM node or jQuery object to enable file pasting:
+      pasteZone: undefined,
+      // The file input field(s), that are listened to for change events.
+      // If undefined, it is set to the file input fields inside
+      // of the widget element on plugin initialization.
+      // Set to null to disable the change listener.
+      fileInput: undefined,
+      // By default, the file input field is replaced with a clone after
+      // each input field change event. This is required for iframe transport
+      // queues and allows change events to be fired for the same file
+      // selection, but can be disabled by setting the following option to false:
+      replaceFileInput: true,
+      // The parameter name for the file form data (the request argument name).
+      // If undefined or empty, the name property of the file input field is
+      // used, or "files[]" if the file input name property is also empty,
+      // can be a string or an array of strings:
+      paramName: undefined,
+      // By default, each file of a selection is uploaded using an individual
+      // request for XHR type uploads. Set to false to upload file
+      // selections in one request each:
+      singleFileUploads: true,
+      // To limit the number of files uploaded with one XHR request,
+      // set the following option to an integer greater than 0:
+      limitMultiFileUploads: undefined,
+      // The following option limits the number of files uploaded with one
+      // XHR request to keep the request size under or equal to the defined
+      // limit in bytes:
+      limitMultiFileUploadSize: undefined,
+      // Multipart file uploads add a number of bytes to each uploaded file,
+      // therefore the following option adds an overhead for each file used
+      // in the limitMultiFileUploadSize configuration:
+      limitMultiFileUploadSizeOverhead: 512,
+      // Set the following option to true to issue all file upload requests
+      // in a sequential order:
+      sequentialUploads: false,
+      // To limit the number of concurrent uploads,
+      // set the following option to an integer greater than 0:
+      limitConcurrentUploads: undefined,
+      // Set the following option to true to force iframe transport uploads:
+      forceIframeTransport: false,
+      // Set the following option to the location of a redirect url on the
+      // origin server, for cross-domain iframe transport uploads:
+      redirect: undefined,
+      // The parameter name for the redirect url, sent as part of the form
+      // data and set to 'redirect' if this option is empty:
+      redirectParamName: undefined,
+      // Set the following option to the location of a postMessage window,
+      // to enable postMessage transport uploads:
+      postMessage: undefined,
+      // By default, XHR file uploads are sent as multipart/form-data.
+      // The iframe transport is always using multipart/form-data.
+      // Set to false to enable non-multipart XHR uploads:
+      multipart: true,
+      // To upload large files in smaller chunks, set the following option
+      // to a preferred maximum chunk size. If set to 0, null or undefined,
+      // or the browser does not support the required Blob API, files will
+      // be uploaded as a whole.
+      maxChunkSize: undefined,
+      // When a non-multipart upload or a chunked multipart upload has been
+      // aborted, this option can be used to resume the upload by setting
+      // it to the size of the already uploaded bytes. This option is most
+      // useful when modifying the options object inside of the "add" or
+      // "send" callbacks, as the options are cloned for each file upload.
+      uploadedBytes: undefined,
+      // By default, failed (abort or error) file uploads are removed from the
+      // global progress calculation. Set the following option to false to
+      // prevent recalculating the global progress data:
+      recalculateProgress: true,
+      // Interval in milliseconds to calculate and trigger progress events:
+      progressInterval: 100,
+      // Interval in milliseconds to calculate progress bitrate:
+      bitrateInterval: 500,
+      // By default, uploads are started automatically when adding files:
+      autoUpload: true,
+      // By default, duplicate file names are expected to be handled on
+      // the server-side. If this is not possible (e.g. when uploading
+      // files directly to Amazon S3), the following option can be set to
+      // an empty object or an object mapping existing filenames, e.g.:
+      // { "image.jpg": true, "image (1).jpg": true }
+      // If it is set, all files will be uploaded with unique filenames,
+      // adding increasing number suffixes if necessary, e.g.:
+      // "image (2).jpg"
+      uniqueFilenames: undefined,
+
+      // Error and info messages:
+      messages: {
+        uploadedBytes: 'Uploaded bytes exceed file size'
+      },
+
+      // Translation function, gets the message key to be translated
+      // and an object with context specific data as arguments:
+      i18n: function(message, context) {
+        // eslint-disable-next-line no-param-reassign
+        message = this.messages[message] || message.toString();
+        if (context) {
+          $.each(context, function(key, value) {
+            // eslint-disable-next-line no-param-reassign
+            message = message.replace('{' + key + '}', value);
+          });
+        }
+        return message;
+      },
+
+      // Additional form data to be sent along with the file uploads can be set
+      // using this option, which accepts an array of objects with name and
+      // value properties, a function returning such an array, a FormData
+      // object (for XHR file uploads), or a simple object.
+      // The form of the first fileInput is given as parameter to the function:
+      formData: function(form) {
+        return form.serializeArray();
+      },
+
+      // The add callback is invoked as soon as files are added to the fileupload
+      // widget (via file input selection, drag & drop, paste or add API call).
+      // If the singleFileUploads option is enabled, this callback will be
+      // called once for each file in the selection for XHR file uploads, else
+      // once for each file selection.
+      //
+      // The upload starts when the submit method is invoked on the data parameter.
+      // The data object contains a files property holding the added files
+      // and allows you to override plugin options as well as define ajax settings.
+      //
+      // Listeners for this callback can also be bound the following way:
+      // .bind('fileuploadadd', func);
+      //
+      // data.submit() returns a Promise object and allows to attach additional
+      // handlers using jQuery's Deferred callbacks:
+      // data.submit().done(func).fail(func).always(func);
+      add: function(e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        if (
+          data.autoUpload ||
+          (data.autoUpload !== false &&
+            $(this).fileupload('option', 'autoUpload'))
+        ) {
+          data.process().done(function() {
+            data.submit();
+          });
+        }
+      },
 
-    // The fileupload widget listens for change events on file input fields defined
-    // via fileInput setting and paste or drop events of the given dropZone.
-    // In addition to the default jQuery Widget methods, the fileupload widget
-    // exposes the "add" and "send" methods, to add or directly send files using
-    // the fileupload API.
-    // By default, files added via file input selection, paste, drag & drop or
-    // "add" method are uploaded immediately, but it is possible to override
-    // the "add" callback option to queue file uploads.
-    $.widget('blueimp.fileupload', {
-
-        options: {
-            // The drop target element(s), by the default the complete document.
-            // Set to null to disable drag & drop support:
-            dropZone: $(document),
-            // The paste target element(s), by the default undefined.
-            // Set to a DOM node or jQuery object to enable file pasting:
-            pasteZone: undefined,
-            // The file input field(s), that are listened to for change events.
-            // If undefined, it is set to the file input fields inside
-            // of the widget element on plugin initialization.
-            // Set to null to disable the change listener.
-            fileInput: undefined,
-            // By default, the file input field is replaced with a clone after
-            // each input field change event. This is required for iframe transport
-            // queues and allows change events to be fired for the same file
-            // selection, but can be disabled by setting the following option to false:
-            replaceFileInput: true,
-            // The parameter name for the file form data (the request argument name).
-            // If undefined or empty, the name property of the file input field is
-            // used, or "files[]" if the file input name property is also empty,
-            // can be a string or an array of strings:
-            paramName: undefined,
-            // By default, each file of a selection is uploaded using an individual
-            // request for XHR type uploads. Set to false to upload file
-            // selections in one request each:
-            singleFileUploads: true,
-            // To limit the number of files uploaded with one XHR request,
-            // set the following option to an integer greater than 0:
-            limitMultiFileUploads: undefined,
-            // The following option limits the number of files uploaded with one
-            // XHR request to keep the request size under or equal to the defined
-            // limit in bytes:
-            limitMultiFileUploadSize: undefined,
-            // Multipart file uploads add a number of bytes to each uploaded file,
-            // therefore the following option adds an overhead for each file used
-            // in the limitMultiFileUploadSize configuration:
-            limitMultiFileUploadSizeOverhead: 512,
-            // Set the following option to true to issue all file upload requests
-            // in a sequential order:
-            sequentialUploads: false,
-            // To limit the number of concurrent uploads,
-            // set the following option to an integer greater than 0:
-            limitConcurrentUploads: undefined,
-            // Set the following option to true to force iframe transport uploads:
-            forceIframeTransport: false,
-            // Set the following option to the location of a redirect url on the
-            // origin server, for cross-domain iframe transport uploads:
-            redirect: undefined,
-            // The parameter name for the redirect url, sent as part of the form
-            // data and set to 'redirect' if this option is empty:
-            redirectParamName: undefined,
-            // Set the following option to the location of a postMessage window,
-            // to enable postMessage transport uploads:
-            postMessage: undefined,
-            // By default, XHR file uploads are sent as multipart/form-data.
-            // The iframe transport is always using multipart/form-data.
-            // Set to false to enable non-multipart XHR uploads:
-            multipart: true,
-            // To upload large files in smaller chunks, set the following option
-            // to a preferred maximum chunk size. If set to 0, null or undefined,
-            // or the browser does not support the required Blob API, files will
-            // be uploaded as a whole.
-            maxChunkSize: undefined,
-            // When a non-multipart upload or a chunked multipart upload has been
-            // aborted, this option can be used to resume the upload by setting
-            // it to the size of the already uploaded bytes. This option is most
-            // useful when modifying the options object inside of the "add" or
-            // "send" callbacks, as the options are cloned for each file upload.
-            uploadedBytes: undefined,
-            // By default, failed (abort or error) file uploads are removed from the
-            // global progress calculation. Set the following option to false to
-            // prevent recalculating the global progress data:
-            recalculateProgress: true,
-            // Interval in milliseconds to calculate and trigger progress events:
-            progressInterval: 100,
-            // Interval in milliseconds to calculate progress bitrate:
-            bitrateInterval: 500,
-            // By default, uploads are started automatically when adding files:
-            autoUpload: true,
-            // By default, duplicate file names are expected to be handled on
-            // the server-side. If this is not possible (e.g. when uploading
-            // files directly to Amazon S3), the following option can be set to
-            // an empty object or an object mapping existing filenames, e.g.:
-            // { "image.jpg": true, "image (1).jpg": true }
-            // If it is set, all files will be uploaded with unique filenames,
-            // adding increasing number suffixes if necessary, e.g.:
-            // "image (2).jpg"
-            uniqueFilenames: undefined,
-
-            // Error and info messages:
-            messages: {
-                uploadedBytes: 'Uploaded bytes exceed file size'
-            },
-
-            // Translation function, gets the message key to be translated
-            // and an object with context specific data as arguments:
-            i18n: function (message, context) {
-                message = this.messages[message] || message.toString();
-                if (context) {
-                    $.each(context, function (key, value) {
-                        message = message.replace('{' + key + '}', value);
-                    });
-                }
-                return message;
-            },
-
-            // Additional form data to be sent along with the file uploads can be set
-            // using this option, which accepts an array of objects with name and
-            // value properties, a function returning such an array, a FormData
-            // object (for XHR file uploads), or a simple object.
-            // The form of the first fileInput is given as parameter to the function:
-            formData: function (form) {
-                return form.serializeArray();
-            },
-
-            // The add callback is invoked as soon as files are added to the fileupload
-            // widget (via file input selection, drag & drop, paste or add API call).
-            // If the singleFileUploads option is enabled, this callback will be
-            // called once for each file in the selection for XHR file uploads, else
-            // once for each file selection.
-            //
-            // The upload starts when the submit method is invoked on the data parameter.
-            // The data object contains a files property holding the added files
-            // and allows you to override plugin options as well as define ajax settings.
-            //
-            // Listeners for this callback can also be bound the following way:
-            // .bind('fileuploadadd', func);
-            //
-            // data.submit() returns a Promise object and allows to attach additional
-            // handlers using jQuery's Deferred callbacks:
-            // data.submit().done(func).fail(func).always(func);
-            add: function (e, data) {
-                if (e.isDefaultPrevented()) {
-                    return false;
-                }
-                if (data.autoUpload || (data.autoUpload !== false &&
-                        $(this).fileupload('option', 'autoUpload'))) {
-                    data.process().done(function () {
-                        data.submit();
-                    });
-                }
-            },
+      // Other callbacks:
 
-            // Other callbacks:
+      // Callback for the submit event of each file upload:
+      // submit: function (e, data) {}, // .bind('fileuploadsubmit', func);
 
-            // Callback for the submit event of each file upload:
-            // submit: function (e, data) {}, // .bind('fileuploadsubmit', func);
+      // Callback for the start of each file upload request:
+      // send: function (e, data) {}, // .bind('fileuploadsend', func);
 
-            // Callback for the start of each file upload request:
-            // send: function (e, data) {}, // .bind('fileuploadsend', func);
+      // Callback for successful uploads:
+      // done: function (e, data) {}, // .bind('fileuploaddone', func);
 
-            // Callback for successful uploads:
-            // done: function (e, data) {}, // .bind('fileuploaddone', func);
+      // Callback for failed (abort or error) uploads:
+      // fail: function (e, data) {}, // .bind('fileuploadfail', func);
 
-            // Callback for failed (abort or error) uploads:
-            // fail: function (e, data) {}, // .bind('fileuploadfail', func);
+      // Callback for completed (success, abort or error) requests:
+      // always: function (e, data) {}, // .bind('fileuploadalways', func);
 
-            // Callback for completed (success, abort or error) requests:
-            // always: function (e, data) {}, // .bind('fileuploadalways', func);
+      // Callback for upload progress events:
+      // progress: function (e, data) {}, // .bind('fileuploadprogress', func);
 
-            // Callback for upload progress events:
-            // progress: function (e, data) {}, // .bind('fileuploadprogress', func);
+      // Callback for global upload progress events:
+      // progressall: function (e, data) {}, // .bind('fileuploadprogressall', func);
 
-            // Callback for global upload progress events:
-            // progressall: function (e, data) {}, // .bind('fileuploadprogressall', func);
+      // Callback for uploads start, equivalent to the global ajaxStart event:
+      // start: function (e) {}, // .bind('fileuploadstart', func);
 
-            // Callback for uploads start, equivalent to the global ajaxStart event:
-            // start: function (e) {}, // .bind('fileuploadstart', func);
+      // Callback for uploads stop, equivalent to the global ajaxStop event:
+      // stop: function (e) {}, // .bind('fileuploadstop', func);
 
-            // Callback for uploads stop, equivalent to the global ajaxStop event:
-            // stop: function (e) {}, // .bind('fileuploadstop', func);
+      // Callback for change events of the fileInput(s):
+      // change: function (e, data) {}, // .bind('fileuploadchange', func);
 
-            // Callback for change events of the fileInput(s):
-            // change: function (e, data) {}, // .bind('fileuploadchange', func);
+      // Callback for paste events to the pasteZone(s):
+      // paste: function (e, data) {}, // .bind('fileuploadpaste', func);
 
-            // Callback for paste events to the pasteZone(s):
-            // paste: function (e, data) {}, // .bind('fileuploadpaste', func);
+      // Callback for drop events of the dropZone(s):
+      // drop: function (e, data) {}, // .bind('fileuploaddrop', func);
 
-            // Callback for drop events of the dropZone(s):
-            // drop: function (e, data) {}, // .bind('fileuploaddrop', func);
+      // Callback for dragover events of the dropZone(s):
+      // dragover: function (e) {}, // .bind('fileuploaddragover', func);
 
-            // Callback for dragover events of the dropZone(s):
-            // dragover: function (e) {}, // .bind('fileuploaddragover', func);
+      // Callback before the start of each chunk upload request (before form data initialization):
+      // chunkbeforesend: function (e, data) {}, // .bind('fileuploadchunkbeforesend', func);
 
-            // Callback before the start of each chunk upload request (before form data initialization):
-            // chunkbeforesend: function (e, data) {}, // .bind('fileuploadchunkbeforesend', func);
+      // Callback for the start of each chunk upload request:
+      // chunksend: function (e, data) {}, // .bind('fileuploadchunksend', func);
 
-            // Callback for the start of each chunk upload request:
-            // chunksend: function (e, data) {}, // .bind('fileuploadchunksend', func);
+      // Callback for successful chunk uploads:
+      // chunkdone: function (e, data) {}, // .bind('fileuploadchunkdone', func);
 
-            // Callback for successful chunk uploads:
-            // chunkdone: function (e, data) {}, // .bind('fileuploadchunkdone', func);
+      // Callback for failed (abort or error) chunk uploads:
+      // chunkfail: function (e, data) {}, // .bind('fileuploadchunkfail', func);
 
-            // Callback for failed (abort or error) chunk uploads:
-            // chunkfail: function (e, data) {}, // .bind('fileuploadchunkfail', func);
+      // Callback for completed (success, abort or error) chunk upload requests:
+      // chunkalways: function (e, data) {}, // .bind('fileuploadchunkalways', func);
 
-            // Callback for completed (success, abort or error) chunk upload requests:
-            // chunkalways: function (e, data) {}, // .bind('fileuploadchunkalways', func);
+      // The plugin options are used as settings object for the ajax calls.
+      // The following are jQuery ajax settings required for the file uploads:
+      processData: false,
+      contentType: false,
+      cache: false,
+      timeout: 0
+    },
 
-            // The plugin options are used as settings object for the ajax calls.
-            // The following are jQuery ajax settings required for the file uploads:
-            processData: false,
-            contentType: false,
-            cache: false,
-            timeout: 0
-        },
+    // A list of options that require reinitializing event listeners and/or
+    // special initialization code:
+    _specialOptions: [
+      'fileInput',
+      'dropZone',
+      'pasteZone',
+      'multipart',
+      'forceIframeTransport'
+    ],
 
-        // A list of options that require reinitializing event listeners and/or
-        // special initialization code:
-        _specialOptions: [
-            'fileInput',
-            'dropZone',
-            'pasteZone',
-            'multipart',
-            'forceIframeTransport'
-        ],
-
-        _blobSlice: $.support.blobSlice && function () {
-            var slice = this.slice || this.webkitSlice || this.mozSlice;
-            return slice.apply(this, arguments);
-        },
+    _blobSlice:
+      $.support.blobSlice &&
+      function() {
+        var slice = this.slice || this.webkitSlice || this.mozSlice;
+        return slice.apply(this, arguments);
+      },
 
-        _BitrateTimer: function () {
-            this.timestamp = ((Date.now) ? Date.now() : (new Date()).getTime());
-            this.loaded = 0;
-            this.bitrate = 0;
-            this.getBitrate = function (now, loaded, interval) {
-                var timeDiff = now - this.timestamp;
-                if (!this.bitrate || !interval || timeDiff > interval) {
-                    this.bitrate = (loaded - this.loaded) * (1000 / timeDiff) * 8;
-                    this.loaded = loaded;
-                    this.timestamp = now;
-                }
-                return this.bitrate;
-            };
-        },
-
-        _isXHRUpload: function (options) {
-            return !options.forceIframeTransport &&
-                ((!options.multipart && $.support.xhrFileUpload) ||
-                $.support.xhrFormDataFileUpload);
-        },
-
-        _getFormData: function (options) {
-            var formData;
-            if ($.type(options.formData) === 'function') {
-                return options.formData(options.form);
-            }
-            if ($.isArray(options.formData)) {
-                return options.formData;
-            }
-            if ($.type(options.formData) === 'object') {
-                formData = [];
-                $.each(options.formData, function (name, value) {
-                    formData.push({name: name, value: value});
-                });
-                return formData;
-            }
-            return [];
-        },
-
-        _getTotal: function (files) {
-            var total = 0;
-            $.each(files, function (index, file) {
-                total += file.size || 1;
+    _BitrateTimer: function() {
+      this.timestamp = Date.now ? Date.now() : new Date().getTime();
+      this.loaded = 0;
+      this.bitrate = 0;
+      this.getBitrate = function(now, loaded, interval) {
+        var timeDiff = now - this.timestamp;
+        if (!this.bitrate || !interval || timeDiff > interval) {
+          this.bitrate = (loaded - this.loaded) * (1000 / timeDiff) * 8;
+          this.loaded = loaded;
+          this.timestamp = now;
+        }
+        return this.bitrate;
+      };
+    },
+
+    _isXHRUpload: function(options) {
+      return (
+        !options.forceIframeTransport &&
+        ((!options.multipart && $.support.xhrFileUpload) ||
+          $.support.xhrFormDataFileUpload)
+      );
+    },
+
+    _getFormData: function(options) {
+      var formData;
+      if ($.type(options.formData) === 'function') {
+        return options.formData(options.form);
+      }
+      if ($.isArray(options.formData)) {
+        return options.formData;
+      }
+      if ($.type(options.formData) === 'object') {
+        formData = [];
+        $.each(options.formData, function(name, value) {
+          formData.push({ name: name, value: value });
+        });
+        return formData;
+      }
+      return [];
+    },
+
+    _getTotal: function(files) {
+      var total = 0;
+      $.each(files, function(index, file) {
+        total += file.size || 1;
+      });
+      return total;
+    },
+
+    _initProgressObject: function(obj) {
+      var progress = {
+        loaded: 0,
+        total: 0,
+        bitrate: 0
+      };
+      if (obj._progress) {
+        $.extend(obj._progress, progress);
+      } else {
+        obj._progress = progress;
+      }
+    },
+
+    _initResponseObject: function(obj) {
+      var prop;
+      if (obj._response) {
+        for (prop in obj._response) {
+          if (Object.prototype.hasOwnProperty.call(obj._response, prop)) {
+            delete obj._response[prop];
+          }
+        }
+      } else {
+        obj._response = {};
+      }
+    },
+
+    _onProgress: function(e, data) {
+      if (e.lengthComputable) {
+        var now = Date.now ? Date.now() : new Date().getTime(),
+          loaded;
+        if (
+          data._time &&
+          data.progressInterval &&
+          now - data._time < data.progressInterval &&
+          e.loaded !== e.total
+        ) {
+          return;
+        }
+        data._time = now;
+        loaded =
+          Math.floor(
+            (e.loaded / e.total) * (data.chunkSize || data._progress.total)
+          ) + (data.uploadedBytes || 0);
+        // Add the difference from the previously loaded state
+        // to the global loaded counter:
+        this._progress.loaded += loaded - data._progress.loaded;
+        this._progress.bitrate = this._bitrateTimer.getBitrate(
+          now,
+          this._progress.loaded,
+          data.bitrateInterval
+        );
+        data._progress.loaded = data.loaded = loaded;
+        data._progress.bitrate = data.bitrate = data._bitrateTimer.getBitrate(
+          now,
+          loaded,
+          data.bitrateInterval
+        );
+        // Trigger a custom progress event with a total data property set
+        // to the file size(s) of the current upload and a loaded data
+        // property calculated accordingly:
+        this._trigger(
+          'progress',
+          $.Event('progress', { delegatedEvent: e }),
+          data
+        );
+        // Trigger a global progress event for all current file uploads,
+        // including ajax calls queued for sequential file uploads:
+        this._trigger(
+          'progressall',
+          $.Event('progressall', { delegatedEvent: e }),
+          this._progress
+        );
+      }
+    },
+
+    _initProgressListener: function(options) {
+      var that = this,
+        xhr = options.xhr ? options.xhr() : $.ajaxSettings.xhr();
+      // Accesss to the native XHR object is required to add event listeners
+      // for the upload progress event:
+      if (xhr.upload) {
+        $(xhr.upload).bind('progress', function(e) {
+          var oe = e.originalEvent;
+          // Make sure the progress event properties get copied over:
+          e.lengthComputable = oe.lengthComputable;
+          e.loaded = oe.loaded;
+          e.total = oe.total;
+          that._onProgress(e, options);
+        });
+        options.xhr = function() {
+          return xhr;
+        };
+      }
+    },
+
+    _deinitProgressListener: function(options) {
+      var xhr = options.xhr ? options.xhr() : $.ajaxSettings.xhr();
+      if (xhr.upload) {
+        $(xhr.upload).unbind('progress');
+      }
+    },
+
+    _isInstanceOf: function(type, obj) {
+      // Cross-frame instanceof check
+      return Object.prototype.toString.call(obj) === '[object ' + type + ']';
+    },
+
+    _getUniqueFilename: function(name, map) {
+      // eslint-disable-next-line no-param-reassign
+      name = String(name);
+      if (map[name]) {
+        // eslint-disable-next-line no-param-reassign
+        name = name.replace(/(?: \(([\d]+)\))?(\.[^.]+)?$/, function(
+          _,
+          p1,
+          p2
+        ) {
+          var index = p1 ? Number(p1) + 1 : 1;
+          var ext = p2 || '';
+          return ' (' + index + ')' + ext;
+        });
+        return this._getUniqueFilename(name, map);
+      }
+      map[name] = true;
+      return name;
+    },
+
+    _initXHRData: function(options) {
+      var that = this,
+        formData,
+        file = options.files[0],
+        // Ignore non-multipart setting if not supported:
+        multipart = options.multipart || !$.support.xhrFileUpload,
+        paramName =
+          $.type(options.paramName) === 'array'
+            ? options.paramName[0]
+            : options.paramName;
+      options.headers = $.extend({}, options.headers);
+      if (options.contentRange) {
+        options.headers['Content-Range'] = options.contentRange;
+      }
+      if (!multipart || options.blob || !this._isInstanceOf('File', file)) {
+        options.headers['Content-Disposition'] =
+          'attachment; filename="' +
+          encodeURI(file.uploadName || file.name) +
+          '"';
+      }
+      if (!multipart) {
+        options.contentType = file.type || 'application/octet-stream';
+        options.data = options.blob || file;
+      } else if ($.support.xhrFormDataFileUpload) {
+        if (options.postMessage) {
+          // window.postMessage does not allow sending FormData
+          // objects, so we just add the File/Blob objects to
+          // the formData array and let the postMessage window
+          // create the FormData object out of this array:
+          formData = this._getFormData(options);
+          if (options.blob) {
+            formData.push({
+              name: paramName,
+              value: options.blob
             });
-            return total;
-        },
-
-        _initProgressObject: function (obj) {
-            var progress = {
-                loaded: 0,
-                total: 0,
-                bitrate: 0
-            };
-            if (obj._progress) {
-                $.extend(obj._progress, progress);
-            } else {
-                obj._progress = progress;
-            }
-        },
-
-        _initResponseObject: function (obj) {
-            var prop;
-            if (obj._response) {
-                for (prop in obj._response) {
-                    if (obj._response.hasOwnProperty(prop)) {
-                        delete obj._response[prop];
-                    }
-                }
-            } else {
-                obj._response = {};
-            }
-        },
-
-        _onProgress: function (e, data) {
-            if (e.lengthComputable) {
-                var now = ((Date.now) ? Date.now() : (new Date()).getTime()),
-                    loaded;
-                if (data._time && data.progressInterval &&
-                        (now - data._time < data.progressInterval) &&
-                        e.loaded !== e.total) {
-                    return;
-                }
-                data._time = now;
-                loaded = Math.floor(
-                    e.loaded / e.total * (data.chunkSize || data._progress.total)
-                ) + (data.uploadedBytes || 0);
-                // Add the difference from the previously loaded state
-                // to the global loaded counter:
-                this._progress.loaded += (loaded - data._progress.loaded);
-                this._progress.bitrate = this._bitrateTimer.getBitrate(
-                    now,
-                    this._progress.loaded,
-                    data.bitrateInterval
-                );
-                data._progress.loaded = data.loaded = loaded;
-                data._progress.bitrate = data.bitrate = data._bitrateTimer.getBitrate(
-                    now,
-                    loaded,
-                    data.bitrateInterval
-                );
-                // Trigger a custom progress event with a total data property set
-                // to the file size(s) of the current upload and a loaded data
-                // property calculated accordingly:
-                this._trigger(
-                    'progress',
-                    $.Event('progress', {delegatedEvent: e}),
-                    data
-                );
-                // Trigger a global progress event for all current file uploads,
-                // including ajax calls queued for sequential file uploads:
-                this._trigger(
-                    'progressall',
-                    $.Event('progressall', {delegatedEvent: e}),
-                    this._progress
-                );
-            }
-        },
-
-        _initProgressListener: function (options) {
-            var that = this,
-                xhr = options.xhr ? options.xhr() : $.ajaxSettings.xhr();
-            // Accesss to the native XHR object is required to add event listeners
-            // for the upload progress event:
-            if (xhr.upload) {
-                $(xhr.upload).bind('progress', function (e) {
-                    var oe = e.originalEvent;
-                    // Make sure the progress event properties get copied over:
-                    e.lengthComputable = oe.lengthComputable;
-                    e.loaded = oe.loaded;
-                    e.total = oe.total;
-                    that._onProgress(e, options);
-                });
-                options.xhr = function () {
-                    return xhr;
-                };
-            }
-        },
-
-        _deinitProgressListener: function (options) {
-            var xhr = options.xhr ? options.xhr() : $.ajaxSettings.xhr();
-            if (xhr.upload) {
-                $(xhr.upload).unbind('progress');
-            }
-        },
-
-        _isInstanceOf: function (type, obj) {
-            // Cross-frame instanceof check
-            return Object.prototype.toString.call(obj) === '[object ' + type + ']';
-        },
-
-        _getUniqueFilename: function (name, map) {
-            name = String(name);
-            if (map[name]) {
-                name = name.replace(
-                    /(?: \(([\d]+)\))?(\.[^.]+)?$/,
-                    function (_, p1, p2) {
-                        var index = p1 ? Number(p1) + 1 : 1;
-                        var ext = p2 || '';
-                        return ' (' + index + ')' + ext;
-                    }
-                );
-                return this._getUniqueFilename(name, map);
-            }
-            map[name] = true;
-            return name;
-        },
-
-        _initXHRData: function (options) {
-            var that = this,
-                formData,
-                file = options.files[0],
-                // Ignore non-multipart setting if not supported:
-                multipart = options.multipart || !$.support.xhrFileUpload,
-                paramName = $.type(options.paramName) === 'array' ?
-                    options.paramName[0] : options.paramName;
-            options.headers = $.extend({}, options.headers);
-            if (options.contentRange) {
-                options.headers['Content-Range'] = options.contentRange;
-            }
-            if (!multipart || options.blob || !this._isInstanceOf('File', file)) {
-                options.headers['Content-Disposition'] = 'attachment; filename="' +
-                    encodeURI(file.uploadName || file.name) + '"';
-            }
-            if (!multipart) {
-                options.contentType = file.type || 'application/octet-stream';
-                options.data = options.blob || file;
-            } else if ($.support.xhrFormDataFileUpload) {
-                if (options.postMessage) {
-                    // window.postMessage does not allow sending FormData
-                    // objects, so we just add the File/Blob objects to
-                    // the formData array and let the postMessage window
-                    // create the FormData object out of this array:
-                    formData = this._getFormData(options);
-                    if (options.blob) {
-                        formData.push({
-                            name: paramName,
-                            value: options.blob
-                        });
-                    } else {
-                        $.each(options.files, function (index, file) {
-                            formData.push({
-                                name: ($.type(options.paramName) === 'array' &&
-                                    options.paramName[index]) || paramName,
-                                value: file
-                            });
-                        });
-                    }
-                } else {
-                    if (that._isInstanceOf('FormData', options.formData)) {
-                        formData = options.formData;
-                    } else {
-                        formData = new FormData();
-                        $.each(this._getFormData(options), function (index, field) {
-                            formData.append(field.name, field.value);
-                        });
-                    }
-                    if (options.blob) {
-                        formData.append(
-                            paramName,
-                            options.blob,
-                            file.uploadName || file.name
-                        );
-                    } else {
-                        $.each(options.files, function (index, file) {
-                            // This check allows the tests to run with
-                            // dummy objects:
-                            if (that._isInstanceOf('File', file) ||
-                                    that._isInstanceOf('Blob', file)) {
-                                var fileName = file.uploadName || file.name;
-                                if (options.uniqueFilenames) {
-                                    fileName = that._getUniqueFilename(
-                                        fileName,
-                                        options.uniqueFilenames
-                                    );
-                                }
-                                formData.append(
-                                    ($.type(options.paramName) === 'array' &&
-                                        options.paramName[index]) || paramName,
-                                    file,
-                                    fileName
-                                );
-                            }
-                        });
-                    }
-                }
-                options.data = formData;
-            }
-            // Blob reference is not needed anymore, free memory:
-            options.blob = null;
-        },
-
-        _initIframeSettings: function (options) {
-            var targetHost = $('<a></a>').prop('href', options.url).prop('host');
-            // Setting the dataType to iframe enables the iframe transport:
-            options.dataType = 'iframe ' + (options.dataType || '');
-            // The iframe transport accepts a serialized array as form data:
-            options.formData = this._getFormData(options);
-            // Add redirect url to form data on cross-domain uploads:
-            if (options.redirect && targetHost && targetHost !== location.host) {
-                options.formData.push({
-                    name: options.redirectParamName || 'redirect',
-                    value: options.redirect
-                });
-            }
-        },
-
-        _initDataSettings: function (options) {
-            if (this._isXHRUpload(options)) {
-                if (!this._chunkedUpload(options, true)) {
-                    if (!options.data) {
-                        this._initXHRData(options);
-                    }
-                    this._initProgressListener(options);
-                }
-                if (options.postMessage) {
-                    // Setting the dataType to postmessage enables the
-                    // postMessage transport:
-                    options.dataType = 'postmessage ' + (options.dataType || '');
-                }
-            } else {
-                this._initIframeSettings(options);
-            }
-        },
-
-        _getParamName: function (options) {
-            var fileInput = $(options.fileInput),
-                paramName = options.paramName;
-            if (!paramName) {
-                paramName = [];
-                fileInput.each(function () {
-                    var input = $(this),
-                        name = input.prop('name') || 'files[]',
-                        i = (input.prop('files') || [1]).length;
-                    while (i) {
-                        paramName.push(name);
-                        i -= 1;
-                    }
-                });
-                if (!paramName.length) {
-                    paramName = [fileInput.prop('name') || 'files[]'];
-                }
-            } else if (!$.isArray(paramName)) {
-                paramName = [paramName];
-            }
-            return paramName;
-        },
-
-        _initFormSettings: function (options) {
-            // Retrieve missing options from the input field and the
-            // associated form, if available:
-            if (!options.form || !options.form.length) {
-                options.form = $(options.fileInput.prop('form'));
-                // If the given file input doesn't have an associated form,
-                // use the default widget file input's form:
-                if (!options.form.length) {
-                    options.form = $(this.options.fileInput.prop('form'));
-                }
-            }
-            options.paramName = this._getParamName(options);
-            if (!options.url) {
-                options.url = options.form.prop('action') || location.href;
-            }
-            // The HTTP request method must be "POST" or "PUT":
-            options.type = (options.type ||
-                ($.type(options.form.prop('method')) === 'string' &&
-                    options.form.prop('method')) || ''
-                ).toUpperCase();
-            if (options.type !== 'POST' && options.type !== 'PUT' &&
-                    options.type !== 'PATCH') {
-                options.type = 'POST';
-            }
-            if (!options.formAcceptCharset) {
-                options.formAcceptCharset = options.form.attr('accept-charset');
-            }
-        },
-
-        _getAJAXSettings: function (data) {
-            var options = $.extend({}, this.options, data);
-            this._initFormSettings(options);
-            this._initDataSettings(options);
-            return options;
-        },
-
-        // jQuery 1.6 doesn't provide .state(),
-        // while jQuery 1.8+ removed .isRejected() and .isResolved():
-        _getDeferredState: function (deferred) {
-            if (deferred.state) {
-                return deferred.state();
-            }
-            if (deferred.isResolved()) {
-                return 'resolved';
-            }
-            if (deferred.isRejected()) {
-                return 'rejected';
-            }
-            return 'pending';
-        },
-
-        // Maps jqXHR callbacks to the equivalent
-        // methods of the given Promise object:
-        _enhancePromise: function (promise) {
-            promise.success = promise.done;
-            promise.error = promise.fail;
-            promise.complete = promise.always;
-            return promise;
-        },
-
-        // Creates and returns a Promise object enhanced with
-        // the jqXHR methods abort, success, error and complete:
-        _getXHRPromise: function (resolveOrReject, context, args) {
-            var dfd = $.Deferred(),
-                promise = dfd.promise();
-            context = context || this.options.context || promise;
-            if (resolveOrReject === true) {
-                dfd.resolveWith(context, args);
-            } else if (resolveOrReject === false) {
-                dfd.rejectWith(context, args);
-            }
-            promise.abort = dfd.promise;
-            return this._enhancePromise(promise);
-        },
-
-        // Adds convenience methods to the data callback argument:
-        _addConvenienceMethods: function (e, data) {
-            var that = this,
-                getPromise = function (args) {
-                    return $.Deferred().resolveWith(that, args).promise();
-                };
-            data.process = function (resolveFunc, rejectFunc) {
-                if (resolveFunc || rejectFunc) {
-                    data._processQueue = this._processQueue =
-                        (this._processQueue || getPromise([this])).then(
-                            function () {
-                                if (data.errorThrown) {
-                                    return $.Deferred()
-                                        .rejectWith(that, [data]).promise();
-                                }
-                                return getPromise(arguments);
-                            }
-                        ).then(resolveFunc, rejectFunc);
-                }
-                return this._processQueue || getPromise([this]);
-            };
-            data.submit = function () {
-                if (this.state() !== 'pending') {
-                    data.jqXHR = this.jqXHR =
-                        (that._trigger(
-                            'submit',
-                            $.Event('submit', {delegatedEvent: e}),
-                            this
-                        ) !== false) && that._onSend(e, this);
-                }
-                return this.jqXHR || that._getXHRPromise();
-            };
-            data.abort = function () {
-                if (this.jqXHR) {
-                    return this.jqXHR.abort();
-                }
-                this.errorThrown = 'abort';
-                that._trigger('fail', null, this);
-                return that._getXHRPromise(false);
-            };
-            data.state = function () {
-                if (this.jqXHR) {
-                    return that._getDeferredState(this.jqXHR);
-                }
-                if (this._processQueue) {
-                    return that._getDeferredState(this._processQueue);
-                }
-            };
-            data.processing = function () {
-                return !this.jqXHR && this._processQueue && that
-                    ._getDeferredState(this._processQueue) === 'pending';
-            };
-            data.progress = function () {
-                return this._progress;
-            };
-            data.response = function () {
-                return this._response;
-            };
-        },
-
-        // Parses the Range header from the server response
-        // and returns the uploaded bytes:
-        _getUploadedBytes: function (jqXHR) {
-            var range = jqXHR.getResponseHeader('Range'),
-                parts = range && range.split('-'),
-                upperBytesPos = parts && parts.length > 1 &&
-                    parseInt(parts[1], 10);
-            return upperBytesPos && upperBytesPos + 1;
-        },
-
-        // Uploads a file in multiple, sequential requests
-        // by splitting the file up in multiple blob chunks.
-        // If the second parameter is true, only tests if the file
-        // should be uploaded in chunks, but does not invoke any
-        // upload requests:
-        _chunkedUpload: function (options, testOnly) {
-            options.uploadedBytes = options.uploadedBytes || 0;
-            var that = this,
-                file = options.files[0],
-                fs = file.size,
-                ub = options.uploadedBytes,
-                mcs = options.maxChunkSize || fs,
-                slice = this._blobSlice,
-                dfd = $.Deferred(),
-                promise = dfd.promise(),
-                jqXHR,
-                upload;
-            if (!(this._isXHRUpload(options) && slice && (ub || ($.type(mcs) === 'function' ? mcs(options) : mcs) < fs)) ||
-                    options.data) {
-                return false;
-            }
-            if (testOnly) {
-                return true;
-            }
-            if (ub >= fs) {
-                file.error = options.i18n('uploadedBytes');
-                return this._getXHRPromise(
-                    false,
-                    options.context,
-                    [null, 'error', file.error]
-                );
-            }
-            // The chunk upload method:
-            upload = function () {
-                // Clone the options object for each chunk upload:
-                var o = $.extend({}, options),
-                    currentLoaded = o._progress.loaded;
-                o.blob = slice.call(
-                    file,
-                    ub,
-                    ub + ($.type(mcs) === 'function' ? mcs(o) : mcs),
-                    file.type
-                );
-                // Store the current chunk size, as the blob itself
-                // will be dereferenced after data processing:
-                o.chunkSize = o.blob.size;
-                // Expose the chunk bytes position range:
-                o.contentRange = 'bytes ' + ub + '-' +
-                    (ub + o.chunkSize - 1) + '/' + fs;
-                // Trigger chunkbeforesend to allow form data to be updated for this chunk
-                that._trigger('chunkbeforesend', null, o);
-                // Process the upload data (the blob and potential form data):
-                that._initXHRData(o);
-                // Add progress listeners for this chunk upload:
-                that._initProgressListener(o);
-                jqXHR = ((that._trigger('chunksend', null, o) !== false && $.ajax(o)) ||
-                        that._getXHRPromise(false, o.context))
-                    .done(function (result, textStatus, jqXHR) {
-                        ub = that._getUploadedBytes(jqXHR) ||
-                            (ub + o.chunkSize);
-                        // Create a progress event if no final progress event
-                        // with loaded equaling total has been triggered
-                        // for this chunk:
-                        if (currentLoaded + o.chunkSize - o._progress.loaded) {
-                            that._onProgress($.Event('progress', {
-                                lengthComputable: true,
-                                loaded: ub - o.uploadedBytes,
-                                total: ub - o.uploadedBytes
-                            }), o);
-                        }
-                        options.uploadedBytes = o.uploadedBytes = ub;
-                        o.result = result;
-                        o.textStatus = textStatus;
-                        o.jqXHR = jqXHR;
-                        that._trigger('chunkdone', null, o);
-                        that._trigger('chunkalways', null, o);
-                        if (ub < fs) {
-                            // File upload not yet complete,
-                            // continue with the next chunk:
-                            upload();
-                        } else {
-                            dfd.resolveWith(
-                                o.context,
-                                [result, textStatus, jqXHR]
-                            );
-                        }
-                    })
-                    .fail(function (jqXHR, textStatus, errorThrown) {
-                        o.jqXHR = jqXHR;
-                        o.textStatus = textStatus;
-                        o.errorThrown = errorThrown;
-                        that._trigger('chunkfail', null, o);
-                        that._trigger('chunkalways', null, o);
-                        dfd.rejectWith(
-                            o.context,
-                            [jqXHR, textStatus, errorThrown]
-                        );
-                    })
-                    .always(function () {
-                        that._deinitProgressListener(o);
-                    });
-            };
-            this._enhancePromise(promise);
-            promise.abort = function () {
-                return jqXHR.abort();
-            };
-            upload();
-            return promise;
-        },
-
-        _beforeSend: function (e, data) {
-            if (this._active === 0) {
-                // the start callback is triggered when an upload starts
-                // and no other uploads are currently running,
-                // equivalent to the global ajaxStart event:
-                this._trigger('start');
-                // Set timer for global bitrate progress calculation:
-                this._bitrateTimer = new this._BitrateTimer();
-                // Reset the global progress values:
-                this._progress.loaded = this._progress.total = 0;
-                this._progress.bitrate = 0;
-            }
-            // Make sure the container objects for the .response() and
-            // .progress() methods on the data object are available
-            // and reset to their initial state:
-            this._initResponseObject(data);
-            this._initProgressObject(data);
-            data._progress.loaded = data.loaded = data.uploadedBytes || 0;
-            data._progress.total = data.total = this._getTotal(data.files) || 1;
-            data._progress.bitrate = data.bitrate = 0;
-            this._active += 1;
-            // Initialize the global progress values:
-            this._progress.loaded += data.loaded;
-            this._progress.total += data.total;
-        },
-
-        _onDone: function (result, textStatus, jqXHR, options) {
-            var total = options._progress.total,
-                response = options._response;
-            if (options._progress.loaded < total) {
-                // Create a progress event if no final progress event
-                // with loaded equaling total has been triggered:
-                this._onProgress($.Event('progress', {
-                    lengthComputable: true,
-                    loaded: total,
-                    total: total
-                }), options);
-            }
-            response.result = options.result = result;
-            response.textStatus = options.textStatus = textStatus;
-            response.jqXHR = options.jqXHR = jqXHR;
-            this._trigger('done', null, options);
-        },
-
-        _onFail: function (jqXHR, textStatus, errorThrown, options) {
-            var response = options._response;
-            if (options.recalculateProgress) {
-                // Remove the failed (error or abort) file upload from
-                // the global progress calculation:
-                this._progress.loaded -= options._progress.loaded;
-                this._progress.total -= options._progress.total;
-            }
-            response.jqXHR = options.jqXHR = jqXHR;
-            response.textStatus = options.textStatus = textStatus;
-            response.errorThrown = options.errorThrown = errorThrown;
-            this._trigger('fail', null, options);
-        },
-
-        _onAlways: function (jqXHRorResult, textStatus, jqXHRorError, options) {
-            // jqXHRorResult, textStatus and jqXHRorError are added to the
-            // options object via done and fail callbacks
-            this._trigger('always', null, options);
-        },
-
-        _onSend: function (e, data) {
-            if (!data.submit) {
-                this._addConvenienceMethods(e, data);
-            }
-            var that = this,
-                jqXHR,
-                aborted,
-                slot,
-                pipe,
-                options = that._getAJAXSettings(data),
-                send = function () {
-                    that._sending += 1;
-                    // Set timer for bitrate progress calculation:
-                    options._bitrateTimer = new that._BitrateTimer();
-                    jqXHR = jqXHR || (
-                        ((aborted || that._trigger(
-                            'send',
-                            $.Event('send', {delegatedEvent: e}),
-                            options
-                        ) === false) &&
-                        that._getXHRPromise(false, options.context, aborted)) ||
-                        that._chunkedUpload(options) || $.ajax(options)
-                    ).done(function (result, textStatus, jqXHR) {
-                        that._onDone(result, textStatus, jqXHR, options);
-                    }).fail(function (jqXHR, textStatus, errorThrown) {
-                        that._onFail(jqXHR, textStatus, errorThrown, options);
-                    }).always(function (jqXHRorResult, textStatus, jqXHRorError) {
-                        that._deinitProgressListener(options);
-                        that._onAlways(
-                            jqXHRorResult,
-                            textStatus,
-                            jqXHRorError,
-                            options
-                        );
-                        that._sending -= 1;
-                        that._active -= 1;
-                        if (options.limitConcurrentUploads &&
-                                options.limitConcurrentUploads > that._sending) {
-                            // Start the next queued upload,
-                            // that has not been aborted:
-                            var nextSlot = that._slots.shift();
-                            while (nextSlot) {
-                                if (that._getDeferredState(nextSlot) === 'pending') {
-                                    nextSlot.resolve();
-                                    break;
-                                }
-                                nextSlot = that._slots.shift();
-                            }
-                        }
-                        if (that._active === 0) {
-                            // The stop callback is triggered when all uploads have
-                            // been completed, equivalent to the global ajaxStop event:
-                            that._trigger('stop');
-                        }
-                    });
-                    return jqXHR;
-                };
-            this._beforeSend(e, options);
-            if (this.options.sequentialUploads ||
-                    (this.options.limitConcurrentUploads &&
-                    this.options.limitConcurrentUploads <= this._sending)) {
-                if (this.options.limitConcurrentUploads > 1) {
-                    slot = $.Deferred();
-                    this._slots.push(slot);
-                    pipe = slot.then(send);
-                } else {
-                    this._sequence = this._sequence.then(send, send);
-                    pipe = this._sequence;
-                }
-                // Return the piped Promise object, enhanced with an abort method,
-                // which is delegated to the jqXHR object of the current upload,
-                // and jqXHR callbacks mapped to the equivalent Promise methods:
-                pipe.abort = function () {
-                    aborted = [undefined, 'abort', 'abort'];
-                    if (!jqXHR) {
-                        if (slot) {
-                            slot.rejectWith(options.context, aborted);
-                        }
-                        return send();
-                    }
-                    return jqXHR.abort();
-                };
-                return this._enhancePromise(pipe);
-            }
-            return send();
-        },
-
-        _onAdd: function (e, data) {
-            var that = this,
-                result = true,
-                options = $.extend({}, this.options, data),
-                files = data.files,
-                filesLength = files.length,
-                limit = options.limitMultiFileUploads,
-                limitSize = options.limitMultiFileUploadSize,
-                overhead = options.limitMultiFileUploadSizeOverhead,
-                batchSize = 0,
-                paramName = this._getParamName(options),
-                paramNameSet,
-                paramNameSlice,
-                fileSet,
-                i,
-                j = 0;
-            if (!filesLength) {
-                return false;
-            }
-            if (limitSize && files[0].size === undefined) {
-                limitSize = undefined;
-            }
-            if (!(options.singleFileUploads || limit || limitSize) ||
-                    !this._isXHRUpload(options)) {
-                fileSet = [files];
-                paramNameSet = [paramName];
-            } else if (!(options.singleFileUploads || limitSize) && limit) {
-                fileSet = [];
-                paramNameSet = [];
-                for (i = 0; i < filesLength; i += limit) {
-                    fileSet.push(files.slice(i, i + limit));
-                    paramNameSlice = paramName.slice(i, i + limit);
-                    if (!paramNameSlice.length) {
-                        paramNameSlice = paramName;
-                    }
-                    paramNameSet.push(paramNameSlice);
-                }
-            } else if (!options.singleFileUploads && limitSize) {
-                fileSet = [];
-                paramNameSet = [];
-                for (i = 0; i < filesLength; i = i + 1) {
-                    batchSize += files[i].size + overhead;
-                    if (i + 1 === filesLength ||
-                            ((batchSize + files[i + 1].size + overhead) > limitSize) ||
-                            (limit && i + 1 - j >= limit)) {
-                        fileSet.push(files.slice(j, i + 1));
-                        paramNameSlice = paramName.slice(j, i + 1);
-                        if (!paramNameSlice.length) {
-                            paramNameSlice = paramName;
-                        }
-                        paramNameSet.push(paramNameSlice);
-                        j = i + 1;
-                        batchSize = 0;
-                    }
-                }
-            } else {
-                paramNameSet = paramName;
-            }
-            data.originalFiles = files;
-            $.each(fileSet || files, function (index, element) {
-                var newData = $.extend({}, data);
-                newData.files = fileSet ? element : [element];
-                newData.paramName = paramNameSet[index];
-                that._initResponseObject(newData);
-                that._initProgressObject(newData);
-                that._addConvenienceMethods(e, newData);
-                result = that._trigger(
-                    'add',
-                    $.Event('add', {delegatedEvent: e}),
-                    newData
-                );
-                return result;
+          } else {
+            $.each(options.files, function(index, file) {
+              formData.push({
+                name:
+                  ($.type(options.paramName) === 'array' &&
+                    options.paramName[index]) ||
+                  paramName,
+                value: file
+              });
             });
-            return result;
-        },
-
-        _replaceFileInput: function (data) {
-            var input = data.fileInput,
-                inputClone = input.clone(true),
-                restoreFocus = input.is(document.activeElement);
-            // Add a reference for the new cloned file input to the data argument:
-            data.fileInputClone = inputClone;
-            $('<form></form>').append(inputClone)[0].reset();
-            // Detaching allows to insert the fileInput on another form
-            // without loosing the file input value:
-            input.after(inputClone).detach();
-            // If the fileInput had focus before it was detached,
-            // restore focus to the inputClone.
-            if (restoreFocus) {
-                inputClone.focus();
-            }
-            // Avoid memory leaks with the detached file input:
-            $.cleanData(input.unbind('remove'));
-            // Replace the original file input element in the fileInput
-            // elements set with the clone, which has been copied including
-            // event handlers:
-            this.options.fileInput = this.options.fileInput.map(function (i, el) {
-                if (el === input[0]) {
-                    return inputClone[0];
-                }
-                return el;
+          }
+        } else {
+          if (that._isInstanceOf('FormData', options.formData)) {
+            formData = options.formData;
+          } else {
+            formData = new FormData();
+            $.each(this._getFormData(options), function(index, field) {
+              formData.append(field.name, field.value);
             });
-            // If the widget has been initialized on the file input itself,
-            // override this.element with the file input clone:
-            if (input[0] === this.element[0]) {
-                this.element = inputClone;
-            }
-        },
-
-        _handleFileTreeEntry: function (entry, path) {
-            var that = this,
-                dfd = $.Deferred(),
-                entries = [],
-                dirReader,
-                errorHandler = function (e) {
-                    if (e && !e.entry) {
-                        e.entry = entry;
-                    }
-                    // Since $.when returns immediately if one
-                    // Deferred is rejected, we use resolve instead.
-                    // This allows valid files and invalid items
-                    // to be returned together in one set:
-                    dfd.resolve([e]);
-                },
-                successHandler = function (entries) {
-                    that._handleFileTreeEntries(
-                        entries,
-                        path + entry.name + '/'
-                    ).done(function (files) {
-                        dfd.resolve(files);
-                    }).fail(errorHandler);
-                },
-                readEntries = function () {
-                    dirReader.readEntries(function (results) {
-                        if (!results.length) {
-                            successHandler(entries);
-                        } else {
-                            entries = entries.concat(results);
-                            readEntries();
-                        }
-                    }, errorHandler);
-                };
-            path = path || '';
-            if (entry.isFile) {
-                if (entry._file) {
-                    // Workaround for Chrome bug #149735
-                    entry._file.relativePath = path;
-                    dfd.resolve(entry._file);
-                } else {
-                    entry.file(function (file) {
-                        file.relativePath = path;
-                        dfd.resolve(file);
-                    }, errorHandler);
+          }
+          if (options.blob) {
+            formData.append(
+              paramName,
+              options.blob,
+              file.uploadName || file.name
+            );
+          } else {
+            $.each(options.files, function(index, file) {
+              // This check allows the tests to run with
+              // dummy objects:
+              if (
+                that._isInstanceOf('File', file) ||
+                that._isInstanceOf('Blob', file)
+              ) {
+                var fileName = file.uploadName || file.name;
+                if (options.uniqueFilenames) {
+                  fileName = that._getUniqueFilename(
+                    fileName,
+                    options.uniqueFilenames
+                  );
                 }
-            } else if (entry.isDirectory) {
-                dirReader = entry.createReader();
-                readEntries();
-            } else {
-                // Return an empty list for file system items
-                // other than files or directories:
-                dfd.resolve([]);
-            }
-            return dfd.promise();
-        },
-
-        _handleFileTreeEntries: function (entries, path) {
-            var that = this;
-            return $.when.apply(
-                $,
-                $.map(entries, function (entry) {
-                    return that._handleFileTreeEntry(entry, path);
-                })
-            ).then(function () {
-                return Array.prototype.concat.apply(
-                    [],
-                    arguments
+                formData.append(
+                  ($.type(options.paramName) === 'array' &&
+                    options.paramName[index]) ||
+                    paramName,
+                  file,
+                  fileName
                 );
+              }
             });
-        },
-
-        _getDroppedFiles: function (dataTransfer) {
-            dataTransfer = dataTransfer || {};
-            var items = dataTransfer.items;
-            if (items && items.length && (items[0].webkitGetAsEntry ||
-                    items[0].getAsEntry)) {
-                return this._handleFileTreeEntries(
-                    $.map(items, function (item) {
-                        var entry;
-                        if (item.webkitGetAsEntry) {
-                            entry = item.webkitGetAsEntry();
-                            if (entry) {
-                                // Workaround for Chrome bug #149735:
-                                entry._file = item.getAsFile();
-                            }
-                            return entry;
-                        }
-                        return item.getAsEntry();
-                    })
-                );
-            }
-            return $.Deferred().resolve(
-                $.makeArray(dataTransfer.files)
-            ).promise();
-        },
-
-        _getSingleFileInputFiles: function (fileInput) {
-            fileInput = $(fileInput);
-            var entries = fileInput.prop('webkitEntries') ||
-                    fileInput.prop('entries'),
-                files,
-                value;
-            if (entries && entries.length) {
-                return this._handleFileTreeEntries(entries);
-            }
-            files = $.makeArray(fileInput.prop('files'));
-            if (!files.length) {
-                value = fileInput.prop('value');
-                if (!value) {
-                    return $.Deferred().resolve([]).promise();
-                }
-                // If the files property is not available, the browser does not
-                // support the File API and we add a pseudo File object with
-                // the input value as name with path information removed:
-                files = [{name: value.replace(/^.*\\/, '')}];
-            } else if (files[0].name === undefined && files[0].fileName) {
-                // File normalization for Safari 4 and Firefox 3:
-                $.each(files, function (index, file) {
-                    file.name = file.fileName;
-                    file.size = file.fileSize;
-                });
+          }
+        }
+        options.data = formData;
+      }
+      // Blob reference is not needed anymore, free memory:
+      options.blob = null;
+    },
+
+    _initIframeSettings: function(options) {
+      var targetHost = $('<a></a>')
+        .prop('href', options.url)
+        .prop('host');
+      // Setting the dataType to iframe enables the iframe transport:
+      options.dataType = 'iframe ' + (options.dataType || '');
+      // The iframe transport accepts a serialized array as form data:
+      options.formData = this._getFormData(options);
+      // Add redirect url to form data on cross-domain uploads:
+      if (options.redirect && targetHost && targetHost !== location.host) {
+        options.formData.push({
+          name: options.redirectParamName || 'redirect',
+          value: options.redirect
+        });
+      }
+    },
+
+    _initDataSettings: function(options) {
+      if (this._isXHRUpload(options)) {
+        if (!this._chunkedUpload(options, true)) {
+          if (!options.data) {
+            this._initXHRData(options);
+          }
+          this._initProgressListener(options);
+        }
+        if (options.postMessage) {
+          // Setting the dataType to postmessage enables the
+          // postMessage transport:
+          options.dataType = 'postmessage ' + (options.dataType || '');
+        }
+      } else {
+        this._initIframeSettings(options);
+      }
+    },
+
+    _getParamName: function(options) {
+      var fileInput = $(options.fileInput),
+        paramName = options.paramName;
+      if (!paramName) {
+        paramName = [];
+        fileInput.each(function() {
+          var input = $(this),
+            name = input.prop('name') || 'files[]',
+            i = (input.prop('files') || [1]).length;
+          while (i) {
+            paramName.push(name);
+            i -= 1;
+          }
+        });
+        if (!paramName.length) {
+          paramName = [fileInput.prop('name') || 'files[]'];
+        }
+      } else if (!$.isArray(paramName)) {
+        paramName = [paramName];
+      }
+      return paramName;
+    },
+
+    _initFormSettings: function(options) {
+      // Retrieve missing options from the input field and the
+      // associated form, if available:
+      if (!options.form || !options.form.length) {
+        options.form = $(options.fileInput.prop('form'));
+        // If the given file input doesn't have an associated form,
+        // use the default widget file input's form:
+        if (!options.form.length) {
+          options.form = $(this.options.fileInput.prop('form'));
+        }
+      }
+      options.paramName = this._getParamName(options);
+      if (!options.url) {
+        options.url = options.form.prop('action') || location.href;
+      }
+      // The HTTP request method must be "POST" or "PUT":
+      options.type = (
+        options.type ||
+        ($.type(options.form.prop('method')) === 'string' &&
+          options.form.prop('method')) ||
+        ''
+      ).toUpperCase();
+      if (
+        options.type !== 'POST' &&
+        options.type !== 'PUT' &&
+        options.type !== 'PATCH'
+      ) {
+        options.type = 'POST';
+      }
+      if (!options.formAcceptCharset) {
+        options.formAcceptCharset = options.form.attr('accept-charset');
+      }
+    },
+
+    _getAJAXSettings: function(data) {
+      var options = $.extend({}, this.options, data);
+      this._initFormSettings(options);
+      this._initDataSettings(options);
+      return options;
+    },
+
+    // jQuery 1.6 doesn't provide .state(),
+    // while jQuery 1.8+ removed .isRejected() and .isResolved():
+    _getDeferredState: function(deferred) {
+      if (deferred.state) {
+        return deferred.state();
+      }
+      if (deferred.isResolved()) {
+        return 'resolved';
+      }
+      if (deferred.isRejected()) {
+        return 'rejected';
+      }
+      return 'pending';
+    },
+
+    // Maps jqXHR callbacks to the equivalent
+    // methods of the given Promise object:
+    _enhancePromise: function(promise) {
+      promise.success = promise.done;
+      promise.error = promise.fail;
+      promise.complete = promise.always;
+      return promise;
+    },
+
+    // Creates and returns a Promise object enhanced with
+    // the jqXHR methods abort, success, error and complete:
+    _getXHRPromise: function(resolveOrReject, context, args) {
+      var dfd = $.Deferred(),
+        promise = dfd.promise();
+      // eslint-disable-next-line no-param-reassign
+      context = context || this.options.context || promise;
+      if (resolveOrReject === true) {
+        dfd.resolveWith(context, args);
+      } else if (resolveOrReject === false) {
+        dfd.rejectWith(context, args);
+      }
+      promise.abort = dfd.promise;
+      return this._enhancePromise(promise);
+    },
+
+    // Adds convenience methods to the data callback argument:
+    _addConvenienceMethods: function(e, data) {
+      var that = this,
+        getPromise = function(args) {
+          return $.Deferred()
+            .resolveWith(that, args)
+            .promise();
+        };
+      data.process = function(resolveFunc, rejectFunc) {
+        if (resolveFunc || rejectFunc) {
+          data._processQueue = this._processQueue = (
+            this._processQueue || getPromise([this])
+          )
+            .then(function() {
+              if (data.errorThrown) {
+                return $.Deferred()
+                  .rejectWith(that, [data])
+                  .promise();
+              }
+              return getPromise(arguments);
+            })
+            .then(resolveFunc, rejectFunc);
+        }
+        return this._processQueue || getPromise([this]);
+      };
+      data.submit = function() {
+        if (this.state() !== 'pending') {
+          data.jqXHR = this.jqXHR =
+            that._trigger(
+              'submit',
+              $.Event('submit', { delegatedEvent: e }),
+              this
+            ) !== false && that._onSend(e, this);
+        }
+        return this.jqXHR || that._getXHRPromise();
+      };
+      data.abort = function() {
+        if (this.jqXHR) {
+          return this.jqXHR.abort();
+        }
+        this.errorThrown = 'abort';
+        that._trigger('fail', null, this);
+        return that._getXHRPromise(false);
+      };
+      data.state = function() {
+        if (this.jqXHR) {
+          return that._getDeferredState(this.jqXHR);
+        }
+        if (this._processQueue) {
+          return that._getDeferredState(this._processQueue);
+        }
+      };
+      data.processing = function() {
+        return (
+          !this.jqXHR &&
+          this._processQueue &&
+          that._getDeferredState(this._processQueue) === 'pending'
+        );
+      };
+      data.progress = function() {
+        return this._progress;
+      };
+      data.response = function() {
+        return this._response;
+      };
+    },
+
+    // Parses the Range header from the server response
+    // and returns the uploaded bytes:
+    _getUploadedBytes: function(jqXHR) {
+      var range = jqXHR.getResponseHeader('Range'),
+        parts = range && range.split('-'),
+        upperBytesPos = parts && parts.length > 1 && parseInt(parts[1], 10);
+      return upperBytesPos && upperBytesPos + 1;
+    },
+
+    // Uploads a file in multiple, sequential requests
+    // by splitting the file up in multiple blob chunks.
+    // If the second parameter is true, only tests if the file
+    // should be uploaded in chunks, but does not invoke any
+    // upload requests:
+    _chunkedUpload: function(options, testOnly) {
+      options.uploadedBytes = options.uploadedBytes || 0;
+      var that = this,
+        file = options.files[0],
+        fs = file.size,
+        ub = options.uploadedBytes,
+        mcs = options.maxChunkSize || fs,
+        slice = this._blobSlice,
+        dfd = $.Deferred(),
+        promise = dfd.promise(),
+        jqXHR,
+        upload;
+      if (
+        !(
+          this._isXHRUpload(options) &&
+          slice &&
+          (ub || ($.type(mcs) === 'function' ? mcs(options) : mcs) < fs)
+        ) ||
+        options.data
+      ) {
+        return false;
+      }
+      if (testOnly) {
+        return true;
+      }
+      if (ub >= fs) {
+        file.error = options.i18n('uploadedBytes');
+        return this._getXHRPromise(false, options.context, [
+          null,
+          'error',
+          file.error
+        ]);
+      }
+      // The chunk upload method:
+      upload = function() {
+        // Clone the options object for each chunk upload:
+        var o = $.extend({}, options),
+          currentLoaded = o._progress.loaded;
+        o.blob = slice.call(
+          file,
+          ub,
+          ub + ($.type(mcs) === 'function' ? mcs(o) : mcs),
+          file.type
+        );
+        // Store the current chunk size, as the blob itself
+        // will be dereferenced after data processing:
+        o.chunkSize = o.blob.size;
+        // Expose the chunk bytes position range:
+        o.contentRange =
+          'bytes ' + ub + '-' + (ub + o.chunkSize - 1) + '/' + fs;
+        // Trigger chunkbeforesend to allow form data to be updated for this chunk
+        that._trigger('chunkbeforesend', null, o);
+        // Process the upload data (the blob and potential form data):
+        that._initXHRData(o);
+        // Add progress listeners for this chunk upload:
+        that._initProgressListener(o);
+        jqXHR = (
+          (that._trigger('chunksend', null, o) !== false && $.ajax(o)) ||
+          that._getXHRPromise(false, o.context)
+        )
+          .done(function(result, textStatus, jqXHR) {
+            ub = that._getUploadedBytes(jqXHR) || ub + o.chunkSize;
+            // Create a progress event if no final progress event
+            // with loaded equaling total has been triggered
+            // for this chunk:
+            if (currentLoaded + o.chunkSize - o._progress.loaded) {
+              that._onProgress(
+                $.Event('progress', {
+                  lengthComputable: true,
+                  loaded: ub - o.uploadedBytes,
+                  total: ub - o.uploadedBytes
+                }),
+                o
+              );
             }
-            return $.Deferred().resolve(files).promise();
-        },
-
-        _getFileInputFiles: function (fileInput) {
-            if (!(fileInput instanceof $) || fileInput.length === 1) {
-                return this._getSingleFileInputFiles(fileInput);
+            options.uploadedBytes = o.uploadedBytes = ub;
+            o.result = result;
+            o.textStatus = textStatus;
+            o.jqXHR = jqXHR;
+            that._trigger('chunkdone', null, o);
+            that._trigger('chunkalways', null, o);
+            if (ub < fs) {
+              // File upload not yet complete,
+              // continue with the next chunk:
+              upload();
+            } else {
+              dfd.resolveWith(o.context, [result, textStatus, jqXHR]);
             }
-            return $.when.apply(
-                $,
-                $.map(fileInput, this._getSingleFileInputFiles)
-            ).then(function () {
-                return Array.prototype.concat.apply(
-                    [],
-                    arguments
+          })
+          .fail(function(jqXHR, textStatus, errorThrown) {
+            o.jqXHR = jqXHR;
+            o.textStatus = textStatus;
+            o.errorThrown = errorThrown;
+            that._trigger('chunkfail', null, o);
+            that._trigger('chunkalways', null, o);
+            dfd.rejectWith(o.context, [jqXHR, textStatus, errorThrown]);
+          })
+          .always(function() {
+            that._deinitProgressListener(o);
+          });
+      };
+      this._enhancePromise(promise);
+      promise.abort = function() {
+        return jqXHR.abort();
+      };
+      upload();
+      return promise;
+    },
+
+    _beforeSend: function(e, data) {
+      if (this._active === 0) {
+        // the start callback is triggered when an upload starts
+        // and no other uploads are currently running,
+        // equivalent to the global ajaxStart event:
+        this._trigger('start');
+        // Set timer for global bitrate progress calculation:
+        this._bitrateTimer = new this._BitrateTimer();
+        // Reset the global progress values:
+        this._progress.loaded = this._progress.total = 0;
+        this._progress.bitrate = 0;
+      }
+      // Make sure the container objects for the .response() and
+      // .progress() methods on the data object are available
+      // and reset to their initial state:
+      this._initResponseObject(data);
+      this._initProgressObject(data);
+      data._progress.loaded = data.loaded = data.uploadedBytes || 0;
+      data._progress.total = data.total = this._getTotal(data.files) || 1;
+      data._progress.bitrate = data.bitrate = 0;
+      this._active += 1;
+      // Initialize the global progress values:
+      this._progress.loaded += data.loaded;
+      this._progress.total += data.total;
+    },
+
+    _onDone: function(result, textStatus, jqXHR, options) {
+      var total = options._progress.total,
+        response = options._response;
+      if (options._progress.loaded < total) {
+        // Create a progress event if no final progress event
+        // with loaded equaling total has been triggered:
+        this._onProgress(
+          $.Event('progress', {
+            lengthComputable: true,
+            loaded: total,
+            total: total
+          }),
+          options
+        );
+      }
+      response.result = options.result = result;
+      response.textStatus = options.textStatus = textStatus;
+      response.jqXHR = options.jqXHR = jqXHR;
+      this._trigger('done', null, options);
+    },
+
+    _onFail: function(jqXHR, textStatus, errorThrown, options) {
+      var response = options._response;
+      if (options.recalculateProgress) {
+        // Remove the failed (error or abort) file upload from
+        // the global progress calculation:
+        this._progress.loaded -= options._progress.loaded;
+        this._progress.total -= options._progress.total;
+      }
+      response.jqXHR = options.jqXHR = jqXHR;
+      response.textStatus = options.textStatus = textStatus;
+      response.errorThrown = options.errorThrown = errorThrown;
+      this._trigger('fail', null, options);
+    },
+
+    _onAlways: function(jqXHRorResult, textStatus, jqXHRorError, options) {
+      // jqXHRorResult, textStatus and jqXHRorError are added to the
+      // options object via done and fail callbacks
+      this._trigger('always', null, options);
+    },
+
+    _onSend: function(e, data) {
+      if (!data.submit) {
+        this._addConvenienceMethods(e, data);
+      }
+      var that = this,
+        jqXHR,
+        aborted,
+        slot,
+        pipe,
+        options = that._getAJAXSettings(data),
+        send = function() {
+          that._sending += 1;
+          // Set timer for bitrate progress calculation:
+          options._bitrateTimer = new that._BitrateTimer();
+          jqXHR =
+            jqXHR ||
+            (
+              ((aborted ||
+                that._trigger(
+                  'send',
+                  $.Event('send', { delegatedEvent: e }),
+                  options
+                ) === false) &&
+                that._getXHRPromise(false, options.context, aborted)) ||
+              that._chunkedUpload(options) ||
+              $.ajax(options)
+            )
+              .done(function(result, textStatus, jqXHR) {
+                that._onDone(result, textStatus, jqXHR, options);
+              })
+              .fail(function(jqXHR, textStatus, errorThrown) {
+                that._onFail(jqXHR, textStatus, errorThrown, options);
+              })
+              .always(function(jqXHRorResult, textStatus, jqXHRorError) {
+                that._deinitProgressListener(options);
+                that._onAlways(
+                  jqXHRorResult,
+                  textStatus,
+                  jqXHRorError,
+                  options
                 );
-            });
-        },
-
-        _onChange: function (e) {
-            var that = this,
-                data = {
-                    fileInput: $(e.target),
-                    form: $(e.target.form)
-                };
-            this._getFileInputFiles(data.fileInput).always(function (files) {
-                data.files = files;
-                if (that.options.replaceFileInput) {
-                    that._replaceFileInput(data);
-                }
-                if (that._trigger(
-                        'change',
-                        $.Event('change', {delegatedEvent: e}),
-                        data
-                    ) !== false) {
-                    that._onAdd(e, data);
-                }
-            });
-        },
-
-        _onPaste: function (e) {
-            var items = e.originalEvent && e.originalEvent.clipboardData &&
-                    e.originalEvent.clipboardData.items,
-                data = {files: []};
-            if (items && items.length) {
-                $.each(items, function (index, item) {
-                    var file = item.getAsFile && item.getAsFile();
-                    if (file) {
-                        data.files.push(file);
+                that._sending -= 1;
+                that._active -= 1;
+                if (
+                  options.limitConcurrentUploads &&
+                  options.limitConcurrentUploads > that._sending
+                ) {
+                  // Start the next queued upload,
+                  // that has not been aborted:
+                  var nextSlot = that._slots.shift();
+                  while (nextSlot) {
+                    if (that._getDeferredState(nextSlot) === 'pending') {
+                      nextSlot.resolve();
+                      break;
                     }
-                });
-                if (this._trigger(
-                        'paste',
-                        $.Event('paste', {delegatedEvent: e}),
-                        data
-                    ) !== false) {
-                    this._onAdd(e, data);
+                    nextSlot = that._slots.shift();
+                  }
                 }
+                if (that._active === 0) {
+                  // The stop callback is triggered when all uploads have
+                  // been completed, equivalent to the global ajaxStop event:
+                  that._trigger('stop');
+                }
+              });
+          return jqXHR;
+        };
+      this._beforeSend(e, options);
+      if (
+        this.options.sequentialUploads ||
+        (this.options.limitConcurrentUploads &&
+          this.options.limitConcurrentUploads <= this._sending)
+      ) {
+        if (this.options.limitConcurrentUploads > 1) {
+          slot = $.Deferred();
+          this._slots.push(slot);
+          pipe = slot.then(send);
+        } else {
+          this._sequence = this._sequence.then(send, send);
+          pipe = this._sequence;
+        }
+        // Return the piped Promise object, enhanced with an abort method,
+        // which is delegated to the jqXHR object of the current upload,
+        // and jqXHR callbacks mapped to the equivalent Promise methods:
+        pipe.abort = function() {
+          aborted = [undefined, 'abort', 'abort'];
+          if (!jqXHR) {
+            if (slot) {
+              slot.rejectWith(options.context, aborted);
             }
-        },
-
-        _onDrop: function (e) {
-            e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
-            var that = this,
-                dataTransfer = e.dataTransfer,
-                data = {};
-            if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
-                e.preventDefault();
-                this._getDroppedFiles(dataTransfer).always(function (files) {
-                    data.files = files;
-                    if (that._trigger(
-                            'drop',
-                            $.Event('drop', {delegatedEvent: e}),
-                            data
-                        ) !== false) {
-                        that._onAdd(e, data);
-                    }
-                });
-            }
-        },
-
-        _onDragOver: getDragHandler('dragover'),
-
-        _onDragEnter: getDragHandler('dragenter'),
-
-        _onDragLeave: getDragHandler('dragleave'),
-
-        _initEventHandlers: function () {
-            if (this._isXHRUpload(this.options)) {
-                this._on(this.options.dropZone, {
-                    dragover: this._onDragOver,
-                    drop: this._onDrop,
-                    // event.preventDefault() on dragenter is required for IE10+:
-                    dragenter: this._onDragEnter,
-                    // dragleave is not required, but added for completeness:
-                    dragleave: this._onDragLeave
-                });
-                this._on(this.options.pasteZone, {
-                    paste: this._onPaste
-                });
-            }
-            if ($.support.fileInput) {
-                this._on(this.options.fileInput, {
-                    change: this._onChange
-                });
+            return send();
+          }
+          return jqXHR.abort();
+        };
+        return this._enhancePromise(pipe);
+      }
+      return send();
+    },
+
+    _onAdd: function(e, data) {
+      var that = this,
+        result = true,
+        options = $.extend({}, this.options, data),
+        files = data.files,
+        filesLength = files.length,
+        limit = options.limitMultiFileUploads,
+        limitSize = options.limitMultiFileUploadSize,
+        overhead = options.limitMultiFileUploadSizeOverhead,
+        batchSize = 0,
+        paramName = this._getParamName(options),
+        paramNameSet,
+        paramNameSlice,
+        fileSet,
+        i,
+        j = 0;
+      if (!filesLength) {
+        return false;
+      }
+      if (limitSize && files[0].size === undefined) {
+        limitSize = undefined;
+      }
+      if (
+        !(options.singleFileUploads || limit || limitSize) ||
+        !this._isXHRUpload(options)
+      ) {
+        fileSet = [files];
+        paramNameSet = [paramName];
+      } else if (!(options.singleFileUploads || limitSize) && limit) {
+        fileSet = [];
+        paramNameSet = [];
+        for (i = 0; i < filesLength; i += limit) {
+          fileSet.push(files.slice(i, i + limit));
+          paramNameSlice = paramName.slice(i, i + limit);
+          if (!paramNameSlice.length) {
+            paramNameSlice = paramName;
+          }
+          paramNameSet.push(paramNameSlice);
+        }
+      } else if (!options.singleFileUploads && limitSize) {
+        fileSet = [];
+        paramNameSet = [];
+        for (i = 0; i < filesLength; i = i + 1) {
+          batchSize += files[i].size + overhead;
+          if (
+            i + 1 === filesLength ||
+            batchSize + files[i + 1].size + overhead > limitSize ||
+            (limit && i + 1 - j >= limit)
+          ) {
+            fileSet.push(files.slice(j, i + 1));
+            paramNameSlice = paramName.slice(j, i + 1);
+            if (!paramNameSlice.length) {
+              paramNameSlice = paramName;
             }
+            paramNameSet.push(paramNameSlice);
+            j = i + 1;
+            batchSize = 0;
+          }
+        }
+      } else {
+        paramNameSet = paramName;
+      }
+      data.originalFiles = files;
+      $.each(fileSet || files, function(index, element) {
+        var newData = $.extend({}, data);
+        newData.files = fileSet ? element : [element];
+        newData.paramName = paramNameSet[index];
+        that._initResponseObject(newData);
+        that._initProgressObject(newData);
+        that._addConvenienceMethods(e, newData);
+        result = that._trigger(
+          'add',
+          $.Event('add', { delegatedEvent: e }),
+          newData
+        );
+        return result;
+      });
+      return result;
+    },
+
+    _replaceFileInput: function(data) {
+      var input = data.fileInput,
+        inputClone = input.clone(true),
+        restoreFocus = input.is(document.activeElement);
+      // Add a reference for the new cloned file input to the data argument:
+      data.fileInputClone = inputClone;
+      $('<form></form>')
+        .append(inputClone)[0]
+        .reset();
+      // Detaching allows to insert the fileInput on another form
+      // without loosing the file input value:
+      input.after(inputClone).detach();
+      // If the fileInput had focus before it was detached,
+      // restore focus to the inputClone.
+      if (restoreFocus) {
+        inputClone.focus();
+      }
+      // Avoid memory leaks with the detached file input:
+      $.cleanData(input.unbind('remove'));
+      // Replace the original file input element in the fileInput
+      // elements set with the clone, which has been copied including
+      // event handlers:
+      this.options.fileInput = this.options.fileInput.map(function(i, el) {
+        if (el === input[0]) {
+          return inputClone[0];
+        }
+        return el;
+      });
+      // If the widget has been initialized on the file input itself,
+      // override this.element with the file input clone:
+      if (input[0] === this.element[0]) {
+        this.element = inputClone;
+      }
+    },
+
+    _handleFileTreeEntry: function(entry, path) {
+      var that = this,
+        dfd = $.Deferred(),
+        entries = [],
+        dirReader,
+        errorHandler = function(e) {
+          if (e && !e.entry) {
+            e.entry = entry;
+          }
+          // Since $.when returns immediately if one
+          // Deferred is rejected, we use resolve instead.
+          // This allows valid files and invalid items
+          // to be returned together in one set:
+          dfd.resolve([e]);
         },
-
-        _destroyEventHandlers: function () {
-            this._off(this.options.dropZone, 'dragenter dragleave dragover drop');
-            this._off(this.options.pasteZone, 'paste');
-            this._off(this.options.fileInput, 'change');
-        },
-
-        _destroy: function () {
-            this._destroyEventHandlers();
+        successHandler = function(entries) {
+          that
+            ._handleFileTreeEntries(entries, path + entry.name + '/')
+            .done(function(files) {
+              dfd.resolve(files);
+            })
+            .fail(errorHandler);
         },
-
-        _setOption: function (key, value) {
-            var reinit = $.inArray(key, this._specialOptions) !== -1;
-            if (reinit) {
-                this._destroyEventHandlers();
+        readEntries = function() {
+          dirReader.readEntries(function(results) {
+            if (!results.length) {
+              successHandler(entries);
+            } else {
+              entries = entries.concat(results);
+              readEntries();
             }
-            this._super(key, value);
-            if (reinit) {
-                this._initSpecialOptions();
-                this._initEventHandlers();
+          }, errorHandler);
+        };
+      // eslint-disable-next-line no-param-reassign
+      path = path || '';
+      if (entry.isFile) {
+        if (entry._file) {
+          // Workaround for Chrome bug #149735
+          entry._file.relativePath = path;
+          dfd.resolve(entry._file);
+        } else {
+          entry.file(function(file) {
+            file.relativePath = path;
+            dfd.resolve(file);
+          }, errorHandler);
+        }
+      } else if (entry.isDirectory) {
+        dirReader = entry.createReader();
+        readEntries();
+      } else {
+        // Return an empty list for file system items
+        // other than files or directories:
+        dfd.resolve([]);
+      }
+      return dfd.promise();
+    },
+
+    _handleFileTreeEntries: function(entries, path) {
+      var that = this;
+      return $.when
+        .apply(
+          $,
+          $.map(entries, function(entry) {
+            return that._handleFileTreeEntry(entry, path);
+          })
+        )
+        .then(function() {
+          return Array.prototype.concat.apply([], arguments);
+        });
+    },
+
+    _getDroppedFiles: function(dataTransfer) {
+      // eslint-disable-next-line no-param-reassign
+      dataTransfer = dataTransfer || {};
+      var items = dataTransfer.items;
+      if (
+        items &&
+        items.length &&
+        (items[0].webkitGetAsEntry || items[0].getAsEntry)
+      ) {
+        return this._handleFileTreeEntries(
+          $.map(items, function(item) {
+            var entry;
+            if (item.webkitGetAsEntry) {
+              entry = item.webkitGetAsEntry();
+              if (entry) {
+                // Workaround for Chrome bug #149735:
+                entry._file = item.getAsFile();
+              }
+              return entry;
             }
-        },
-
-        _initSpecialOptions: function () {
-            var options = this.options;
-            if (options.fileInput === undefined) {
-                options.fileInput = this.element.is('input[type="file"]') ?
-                        this.element : this.element.find('input[type="file"]');
-            } else if (!(options.fileInput instanceof $)) {
-                options.fileInput = $(options.fileInput);
+            return item.getAsEntry();
+          })
+        );
+      }
+      return $.Deferred()
+        .resolve($.makeArray(dataTransfer.files))
+        .promise();
+    },
+
+    _getSingleFileInputFiles: function(fileInput) {
+      // eslint-disable-next-line no-param-reassign
+      fileInput = $(fileInput);
+      var entries =
+          fileInput.prop('webkitEntries') || fileInput.prop('entries'),
+        files,
+        value;
+      if (entries && entries.length) {
+        return this._handleFileTreeEntries(entries);
+      }
+      files = $.makeArray(fileInput.prop('files'));
+      if (!files.length) {
+        value = fileInput.prop('value');
+        if (!value) {
+          return $.Deferred()
+            .resolve([])
+            .promise();
+        }
+        // If the files property is not available, the browser does not
+        // support the File API and we add a pseudo File object with
+        // the input value as name with path information removed:
+        files = [{ name: value.replace(/^.*\\/, '') }];
+      } else if (files[0].name === undefined && files[0].fileName) {
+        // File normalization for Safari 4 and Firefox 3:
+        $.each(files, function(index, file) {
+          file.name = file.fileName;
+          file.size = file.fileSize;
+        });
+      }
+      return $.Deferred()
+        .resolve(files)
+        .promise();
+    },
+
+    _getFileInputFiles: function(fileInput) {
+      if (!(fileInput instanceof $) || fileInput.length === 1) {
+        return this._getSingleFileInputFiles(fileInput);
+      }
+      return $.when
+        .apply($, $.map(fileInput, this._getSingleFileInputFiles))
+        .then(function() {
+          return Array.prototype.concat.apply([], arguments);
+        });
+    },
+
+    _onChange: function(e) {
+      var that = this,
+        data = {
+          fileInput: $(e.target),
+          form: $(e.target.form)
+        };
+      this._getFileInputFiles(data.fileInput).always(function(files) {
+        data.files = files;
+        if (that.options.replaceFileInput) {
+          that._replaceFileInput(data);
+        }
+        if (
+          that._trigger(
+            'change',
+            $.Event('change', { delegatedEvent: e }),
+            data
+          ) !== false
+        ) {
+          that._onAdd(e, data);
+        }
+      });
+    },
+
+    _onPaste: function(e) {
+      var items =
+          e.originalEvent &&
+          e.originalEvent.clipboardData &&
+          e.originalEvent.clipboardData.items,
+        data = { files: [] };
+      if (items && items.length) {
+        $.each(items, function(index, item) {
+          var file = item.getAsFile && item.getAsFile();
+          if (file) {
+            data.files.push(file);
+          }
+        });
+        if (
+          this._trigger(
+            'paste',
+            $.Event('paste', { delegatedEvent: e }),
+            data
+          ) !== false
+        ) {
+          this._onAdd(e, data);
+        }
+      }
+    },
+
+    _onDrop: function(e) {
+      e.dataTransfer = e.originalEvent && e.originalEvent.dataTransfer;
+      var that = this,
+        dataTransfer = e.dataTransfer,
+        data = {};
+      if (dataTransfer && dataTransfer.files && dataTransfer.files.length) {
+        e.preventDefault();
+        this._getDroppedFiles(dataTransfer).always(function(files) {
+          data.files = files;
+          if (
+            that._trigger(
+              'drop',
+              $.Event('drop', { delegatedEvent: e }),
+              data
+            ) !== false
+          ) {
+            that._onAdd(e, data);
+          }
+        });
+      }
+    },
+
+    _onDragOver: getDragHandler('dragover'),
+
+    _onDragEnter: getDragHandler('dragenter'),
+
+    _onDragLeave: getDragHandler('dragleave'),
+
+    _initEventHandlers: function() {
+      if (this._isXHRUpload(this.options)) {
+        this._on(this.options.dropZone, {
+          dragover: this._onDragOver,
+          drop: this._onDrop,
+          // event.preventDefault() on dragenter is required for IE10+:
+          dragenter: this._onDragEnter,
+          // dragleave is not required, but added for completeness:
+          dragleave: this._onDragLeave
+        });
+        this._on(this.options.pasteZone, {
+          paste: this._onPaste
+        });
+      }
+      if ($.support.fileInput) {
+        this._on(this.options.fileInput, {
+          change: this._onChange
+        });
+      }
+    },
+
+    _destroyEventHandlers: function() {
+      this._off(this.options.dropZone, 'dragenter dragleave dragover drop');
+      this._off(this.options.pasteZone, 'paste');
+      this._off(this.options.fileInput, 'change');
+    },
+
+    _destroy: function() {
+      this._destroyEventHandlers();
+    },
+
+    _setOption: function(key, value) {
+      var reinit = $.inArray(key, this._specialOptions) !== -1;
+      if (reinit) {
+        this._destroyEventHandlers();
+      }
+      this._super(key, value);
+      if (reinit) {
+        this._initSpecialOptions();
+        this._initEventHandlers();
+      }
+    },
+
+    _initSpecialOptions: function() {
+      var options = this.options;
+      if (options.fileInput === undefined) {
+        options.fileInput = this.element.is('input[type="file"]')
+          ? this.element
+          : this.element.find('input[type="file"]');
+      } else if (!(options.fileInput instanceof $)) {
+        options.fileInput = $(options.fileInput);
+      }
+      if (!(options.dropZone instanceof $)) {
+        options.dropZone = $(options.dropZone);
+      }
+      if (!(options.pasteZone instanceof $)) {
+        options.pasteZone = $(options.pasteZone);
+      }
+    },
+
+    _getRegExp: function(str) {
+      var parts = str.split('/'),
+        modifiers = parts.pop();
+      parts.shift();
+      return new RegExp(parts.join('/'), modifiers);
+    },
+
+    _isRegExpOption: function(key, value) {
+      return (
+        key !== 'url' &&
+        $.type(value) === 'string' &&
+        /^\/.*\/[igm]{0,3}$/.test(value)
+      );
+    },
+
+    _initDataAttributes: function() {
+      var that = this,
+        options = this.options,
+        data = this.element.data();
+      // Initialize options set via HTML5 data-attributes:
+      $.each(this.element[0].attributes, function(index, attr) {
+        var key = attr.name.toLowerCase(),
+          value;
+        if (/^data-/.test(key)) {
+          // Convert hyphen-ated key to camelCase:
+          key = key.slice(5).replace(/-[a-z]/g, function(str) {
+            return str.charAt(1).toUpperCase();
+          });
+          value = data[key];
+          if (that._isRegExpOption(key, value)) {
+            value = that._getRegExp(value);
+          }
+          options[key] = value;
+        }
+      });
+    },
+
+    _create: function() {
+      this._initDataAttributes();
+      this._initSpecialOptions();
+      this._slots = [];
+      this._sequence = this._getXHRPromise(true);
+      this._sending = this._active = 0;
+      this._initProgressObject(this);
+      this._initEventHandlers();
+    },
+
+    // This method is exposed to the widget API and allows to query
+    // the number of active uploads:
+    active: function() {
+      return this._active;
+    },
+
+    // This method is exposed to the widget API and allows to query
+    // the widget upload progress.
+    // It returns an object with loaded, total and bitrate properties
+    // for the running uploads:
+    progress: function() {
+      return this._progress;
+    },
+
+    // This method is exposed to the widget API and allows adding files
+    // using the fileupload API. The data parameter accepts an object which
+    // must have a files property and can contain additional options:
+    // .fileupload('add', {files: filesList});
+    add: function(data) {
+      var that = this;
+      if (!data || this.options.disabled) {
+        return;
+      }
+      if (data.fileInput && !data.files) {
+        this._getFileInputFiles(data.fileInput).always(function(files) {
+          data.files = files;
+          that._onAdd(null, data);
+        });
+      } else {
+        data.files = $.makeArray(data.files);
+        this._onAdd(null, data);
+      }
+    },
+
+    // This method is exposed to the widget API and allows sending files
+    // using the fileupload API. The data parameter accepts an object which
+    // must have a files or fileInput property and can contain additional options:
+    // .fileupload('send', {files: filesList});
+    // The method returns a Promise object for the file upload call.
+    send: function(data) {
+      if (data && !this.options.disabled) {
+        if (data.fileInput && !data.files) {
+          var that = this,
+            dfd = $.Deferred(),
+            promise = dfd.promise(),
+            jqXHR,
+            aborted;
+          promise.abort = function() {
+            aborted = true;
+            if (jqXHR) {
+              return jqXHR.abort();
             }
-            if (!(options.dropZone instanceof $)) {
-                options.dropZone = $(options.dropZone);
+            dfd.reject(null, 'abort', 'abort');
+            return promise;
+          };
+          this._getFileInputFiles(data.fileInput).always(function(files) {
+            if (aborted) {
+              return;
             }
-            if (!(options.pasteZone instanceof $)) {
-                options.pasteZone = $(options.pasteZone);
+            if (!files.length) {
+              dfd.reject();
+              return;
             }
-        },
-
-        _getRegExp: function (str) {
-            var parts = str.split('/'),
-                modifiers = parts.pop();
-            parts.shift();
-            return new RegExp(parts.join('/'), modifiers);
-        },
-
-        _isRegExpOption: function (key, value) {
-            return key !== 'url' && $.type(value) === 'string' &&
-                /^\/.*\/[igm]{0,3}$/.test(value);
-        },
-
-        _initDataAttributes: function () {
-            var that = this,
-                options = this.options,
-                data = this.element.data();
-            // Initialize options set via HTML5 data-attributes:
-            $.each(
-                this.element[0].attributes,
-                function (index, attr) {
-                    var key = attr.name.toLowerCase(),
-                        value;
-                    if (/^data-/.test(key)) {
-                        // Convert hyphen-ated key to camelCase:
-                        key = key.slice(5).replace(/-[a-z]/g, function (str) {
-                            return str.charAt(1).toUpperCase();
-                        });
-                        value = data[key];
-                        if (that._isRegExpOption(key, value)) {
-                            value = that._getRegExp(value);
-                        }
-                        options[key] = value;
-                    }
-                }
+            data.files = files;
+            jqXHR = that._onSend(null, data);
+            jqXHR.then(
+              function(result, textStatus, jqXHR) {
+                dfd.resolve(result, textStatus, jqXHR);
+              },
+              function(jqXHR, textStatus, errorThrown) {
+                dfd.reject(jqXHR, textStatus, errorThrown);
+              }
             );
-        },
-
-        _create: function () {
-            this._initDataAttributes();
-            this._initSpecialOptions();
-            this._slots = [];
-            this._sequence = this._getXHRPromise(true);
-            this._sending = this._active = 0;
-            this._initProgressObject(this);
-            this._initEventHandlers();
-        },
-
-        // This method is exposed to the widget API and allows to query
-        // the number of active uploads:
-        active: function () {
-            return this._active;
-        },
-
-        // This method is exposed to the widget API and allows to query
-        // the widget upload progress.
-        // It returns an object with loaded, total and bitrate properties
-        // for the running uploads:
-        progress: function () {
-            return this._progress;
-        },
-
-        // This method is exposed to the widget API and allows adding files
-        // using the fileupload API. The data parameter accepts an object which
-        // must have a files property and can contain additional options:
-        // .fileupload('add', {files: filesList});
-        add: function (data) {
-            var that = this;
-            if (!data || this.options.disabled) {
-                return;
-            }
-            if (data.fileInput && !data.files) {
-                this._getFileInputFiles(data.fileInput).always(function (files) {
-                    data.files = files;
-                    that._onAdd(null, data);
-                });
-            } else {
-                data.files = $.makeArray(data.files);
-                this._onAdd(null, data);
-            }
-        },
-
-        // This method is exposed to the widget API and allows sending files
-        // using the fileupload API. The data parameter accepts an object which
-        // must have a files or fileInput property and can contain additional options:
-        // .fileupload('send', {files: filesList});
-        // The method returns a Promise object for the file upload call.
-        send: function (data) {
-            if (data && !this.options.disabled) {
-                if (data.fileInput && !data.files) {
-                    var that = this,
-                        dfd = $.Deferred(),
-                        promise = dfd.promise(),
-                        jqXHR,
-                        aborted;
-                    promise.abort = function () {
-                        aborted = true;
-                        if (jqXHR) {
-                            return jqXHR.abort();
-                        }
-                        dfd.reject(null, 'abort', 'abort');
-                        return promise;
-                    };
-                    this._getFileInputFiles(data.fileInput).always(
-                        function (files) {
-                            if (aborted) {
-                                return;
-                            }
-                            if (!files.length) {
-                                dfd.reject();
-                                return;
-                            }
-                            data.files = files;
-                            jqXHR = that._onSend(null, data);
-                            jqXHR.then(
-                                function (result, textStatus, jqXHR) {
-                                    dfd.resolve(result, textStatus, jqXHR);
-                                },
-                                function (jqXHR, textStatus, errorThrown) {
-                                    dfd.reject(jqXHR, textStatus, errorThrown);
-                                }
-                            );
-                        }
-                    );
-                    return this._enhancePromise(promise);
-                }
-                data.files = $.makeArray(data.files);
-                if (data.files.length) {
-                    return this._onSend(null, data);
-                }
-            }
-            return this._getXHRPromise(false, data && data.context);
+          });
+          return this._enhancePromise(promise);
         }
-
-    });
-
-}));
+        data.files = $.makeArray(data.files);
+        if (data.files.length) {
+          return this._onSend(null, data);
+        }
+      }
+      return this._getXHRPromise(false, data && data.context);
+    }
+  });
+});