How to replicate CouchDB to a desktop browser?

I've heard that CouchDB can replicate to desktop browsers, such as: http://www.youtube.com/watch开发者_如何学C?v=Na2yApM9ydw

How can a CouchDB database be replicated to a desktop browser?

The web browser would have to be running a CouchDB instance or a "clone" that uses a compatible API, but uses a browser-based database under the hood. (like localStorage, IndexedDB, etc.)

There are several projects out there, namely: BrowserCouch and IDBCouch

BrowserCouch is a JavaScript-based implementation of Map/Reduce with the CouchDB API. IDBCouch leverages IndexedDB (a Mozilla project) for the same basic purpose.