Using Node.js with JS-comint in Emacs

Question

I use Emacs 24.2. I've installed js-comint and js-mode from MELPA, executed run-js, and now in REPL instead of > sign i have this gibberish:

^[[1G> ^[[0K^[[3G

The REPL itself in Inferior Javascript mode works just fine, just the > sign is changed. If you enter unfinished expression, it even prints ^[[1G... ^[[0K^[[5G. The ^[ are system characters, that are not copied with copy-paste, i add them for you to have an idea.

In my init-file:

(require 'js-comint)
(setq inferior-js-program-command "nodejs")

In terminal calling nodejs produces working REPL.

Why prompt behaves this way? What should i do to correct this?

score 20 · Answer 1 · edited May 23 '17 at 11:53

20

Just add one line in your .emacs:

(setenv "NODE_NO_READLINE" "1")

Answer come from this post: Node.js prompt '>' can not show in eshell

edited May 23 '17 at 11:53

Community

1
1

answered May 19 '13 at 08:07

tangxinfa

1,410
13
12

+1. this basically worked for me, thanks. I created a file named 'repl' in my app directory, and in it put NODE_NO_READLINE=1 node. Then just call ./repl from within an emacs shell and you get a node repl inside emacs with correct module scoping and no output giberrish. – Scott Klarenbach Sep 11 '15 at 03:24

score 18 · Accepted Answer · answered Dec 13 '12 at 15:19

18

(setq inferior-js-mode-hook
      (lambda ()
        ;; We like nice colors
        (ansi-color-for-comint-mode-on)
        ;; Deal with some prompt nonsense
        (add-to-list
         'comint-preoutput-filter-functions
         (lambda (output)
           (replace-regexp-in-string "\033\\[[0-9]+[GK]" "" output)))))

\033 is the escape character it prints as ^[.

answered Dec 13 '12 at 15:19

but why does prompt produce garbage? – Mirzhan Irkegulov Jan 05 '13 at 18:35
1

Made a minor edit to the last statement: `(replace-regexp-in-string "\033\\[[0-9]+[A-Z]" "" output)))))` – narayan Jul 12 '13 at 20:24

score 2 · Answer 3 · answered Feb 15 '14 at 21:25

2

Not sure how recent, but now one can download and use the nodejs-repl.

answered Feb 15 '14 at 21:25

nymo

532
1
5
14

Using Node.js with JS-comint in Emacs

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