The HTML5 Filesystem API is a versatile API that addresses many of the uses cases that the other offline APIs don’t. It can remedy their shortcomings, like making it difficult to dynamically caching a page. I’m looking at you AppCache! My ♥ for the API is deep–so much so that I wrote a book and released a library called filer.js to help promote its adoption. While filer aims to make the API more c