File: uploader/js/uploader.js

            /**
            * Provides UI for selecting multiple files and functionality for
            * uploading multiple files to the server with support for either
            * html5 or Flash transport mechanisms, automatic queue management,
            * upload progress monitoring, and error events.
            * @module uploader
            * @main uploader
            * @since 3.5.0
            */
            
            /**
            * `Y.Uploader` serves as an alias for either <a href="UploaderFlash.html">`Y.UploaderFlash`</a>
            * or <a href="UploaderHTML5.html">`Y.UploaderHTML5`</a>, depending on the feature set available
            * in a specific browser. If neither HTML5 nor Flash transport layers are available, `Y.Uploader.TYPE`
            * static property is set to `"none"`.
            *
            * @class Uploader
            */
            
            /**
            * The static property reflecting the type of uploader that `Y.Uploader`
            * aliases. The possible values are:
            * <ul>
            * <li><strong>`"html5"`</strong>: Y.Uploader is an alias for <a href="UploaderHTML5.html">Y.UploaderHTML5</a></li>
            * <li><strong>`"flash"`</strong>: Y.Uploader is an alias for <a href="UploaderFlash.html">Y.UploaderFlash</a></li>
            * <li><strong>`"none"`</strong>: Neither Flash not HTML5 are available, and Y.Uploader does
            * not reference an actual implementation.</li>
            * </ul>
            *
            * @property TYPE
            * @type {String}
            * @static
            */
            
            var Win = Y.config.win;
            
            if (Win && Win.File && Win.FormData && Win.XMLHttpRequest) {
                Y.Uploader = Y.UploaderHTML5;
            }
            
            else if (Y.SWFDetect.isFlashVersionAtLeast(10,0,45)) {
                Y.Uploader = Y.UploaderFlash;
            }
            
            else {
                Y.namespace("Uploader");
                Y.Uploader.TYPE = "none";
            }