You should probably put a link in the README.md in the github repository - it was the first thing I looked for (Cmd+F -> "demo"). Nothing beats a visual experience in case of a frontend library.
Neat, thanks! Literally just this morning I was thinking to myself that I would give just about anything for a high quality OSS rich text editor capable of generating terse, correct HTML output.
And here, not even 24 hours later, one just falls into my lap.
There's also ProseMirror [1], which I'm told is very good, and supports extensions of its document model to support things like embedded objects and Markdown, and is designed for collaborative editing -- all document operations are patches that can be sent over the network.
You'll want to add "cursor: hand;" to your CSS when someone hovers over the styling buttons. Because right now, it default to the cursor point, which doesn't given a clue to the user that the styling buttons are clickable.
