Same demo of Basic single image demo but loading FileUploader using the UMD version.
Both FileUploader.umd.min.js (that exposes the FileUplader variable)
and en.umd.min.js (that exposes fupl_strings_en)
are loaded using a script tag directly from dist/ folder.
Take a look at the "About the demo" section in the README file for info about the following code boxes.