DevDocs is made of two pieces: a Ruby scraper that generates the documentation and metadata, and a JavaScript app powered by a small Sinatra app. Finally, point your browser at localhost:9292 (the first request will take a few seconds to compile the assets). You're all set.

Yes, one of the key features of DevDocs.io is its ability to work offline. Users can download the documentation they need and access it anytime, anywhere, without an internet connection. This makes DevDocs.io a reliable resource for developers who may not always have access to the internet.

Developer documentation provides developers with comprehensive software information, which they utilize to understand, develop and interact with the software product. These documents guide them through the code, explaining the design, code choices, and implementation processes.