Javascript implementation of emacs [closed]

Question

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?

Answer 1

You are probably looking for Ace. It's the successor of Bespin/Skywriter. See

http://ace.ajax.org/

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:

http://sharejs.org/code.html

Answer 2

You might be thinking of Ymacs. It's written in javascript and I don't feel like porting over my extensive customizations so I have only used the demo a little. That and I don't have much use for a web text editor. As far as I can see there is no effort made to make it compatible with Emacs, rather only to be "emacs-like".