Here’s a Github issue that turned into a good philosophical debate on how to build a progressive web app: should you enhance your existing site or creating a separate URL?
(For the record: I’m in favour of enhancing.)
Matthew describes a very nice bit of progressive enhancement for drag’n’drop file uploads (similar to the CSS Tricks article I linked to recently).
It uses the Dropzone JS which looks like it aligns nicely with the progressive enhancement approach.
Not only is FixMyStreet responsive, it’s using the “display: table-caption” trick I documented for adjustable “content first/navigation second” source order.