Text Adventure (Interactive Fiction) Javascript Engine

I have been looking for a Javascript engine suitable for creating simple text adventures or interactive fiction games.

My current choice is Choice Script that allow for creating games directly in text files with simple, custom language, while Javascript processes the game script and runs game in a browser. You can download Choice Script at Github.

Blink! also looks clean and good and I might research it more later. Undum is another option and looks as a beautiful match for the fantasy IF games.

Have you tried writing a game in these or any other interactive fiction Javascript engines? Let me know.