Simply Jonathan

Enhancing a Comment Form: From Basic to Custom Error Message to BackgroundSync 

Simple step-by-step instructions for how to take a plain old form and improving it with lots of added behaviour, provided the browser supports the features.

This should really serve as the go-to example for how to do progressive enhancement.

This is Simply Jonathan, a blog written by Jonathan Holst. It's mostly about technical topics (and mainly the Web at that), but an occasional post on clothing, sports, and general personal life topics can be found.

Jonathan Holst is a programmer, language enthusiast, sports fan, and appreciator of good design, living in Copenhagen, Denmark, Europe. He is also someone pretentious enough to call himself the 'author' of a blog. And talk about himself in the third person.