Draft.js – Rich Text Editor Framework for React
My ProseMirror [1] project is in the same space (including using persistent data model detached from the DOM). It has a richer, tree-shaped document model and collaboration [2], but not quite as much programmerpower behind it since I'm a single OSS dev as opposed to a giant tech company.[1]: https://prosemirror.net
[2]: http://marijnhaverbeke.nl/blog/collaborative-editing.html