What implementations (emulations, clones) of emacs are there that are written in javascript? How are their stability, functionality, and compatibility with the original (GNU emacs)?
Edit I want to embed a text editor in a web application with emacs functionalities. The two answers I have gotten suggest Ymacs and Ace. What are their characteristics? How do they compare?
You are probably looking for Ace. It's the successor of Bespin/Skywriter. See
or for the code
https://github.com/ajaxorg/ace
It is also used by ShareJS, an awesome Google-wave-like tool for collaborative editing. See http://sharejs.org/ and especially the demo here: