Emacs run-javascript?

Question

Is there such a thing as a javascript equivalent to run-python et al available for Emacs 23 or later? I'd like to run a JS REPL from within Emacs with the standard load-definition/load-file bindings.

Answer 1

Oh, this is cool. (Thanks for the question!)

I've just learned about MozRepl -- a Mozilla/Firefox extension -- via this answer to a related question, and Emacs support for MozRepl is already available.

1. Install the browser extension and the Emacs library
2. Start MozRepl from the browser using the Tools -> MozRepl menu
3. M-x run-mozilla RET

See also http://www.emacswiki.org/emacs/MozRepl

Answer 2

Yes. Check out js-comint.el, which is easily installable via Marmalade or MELPA.

As @phils mentions, MozRepl is also worth a look.