In this seminar you learn how to use jQuery, JavaScript, Ajax and a Web API method to upload multiple files asynchronously. As each file is uploaded, a progress bar is displayed to indicate the progress for each file. In order to accomplish this, you learn to clone an HTML template for each file selected to upload. You also learn to upload additional data with each file. Yes, you can find free, open-source libraries to help you do this, but it is always good to know how these things work under the hood.