beautify some js code in emacs

js-beautify.el

;;; js-beautify.el -- beautify some js code

(defgroup js-beautify nil
  "Use jsbeautify to beautify some js"
  :group 'editing)

(defcustom js-beautify-args "--jslint-happy --brace-style=end-expand --keep-array-indentation"
  "Arguments to pass to jsbeautify script"
  :type '(string)
  :group 'js-beautify)

(defcustom js-beautify-path "~/projects/js-beautify/python/jsbeautifier.py"
  "Path to jsbeautifier python file"
  :type '(string)
  :group 'js-beautify)

(defun js-beautify ()
  "Beautify a region of javascript using the code from jsbeautify.org"
  (interactive)
  (let ((orig-point (point)))
    (unless (mark)
      (mark-defun))
    (shell-command-on-region (point)
                             (mark)
                             (concat "python "
                                     js-beautify-path
                                     " --stdin "
                                     js-beautify-args)
                             nil t)
    (goto-char orig-point)))

(provide 'js-beautify)
;;; js-beautify.el ends here

Thanks for putting this out there. I added to this a bit (checked in also):

;;; js-beautify.el -- beautify some js code
 (defcustom rhino-jar "~/software/rhino1_7R"
       "Location of the rhino jar e.g. rhino1_7R2"
       :type '(string)
       :group 'data)
 (defcustom beautify-dir "~/software/js-beautify"
       "Location of the js-beautify directory e.g. ~/software/js-beautify"
       :type '(string)
       :group 'data)
 (defun js-beautify-region ()
  "Beautify a region of javascript using the code from jsbeautify.org. If you don't have
   a region selected, the code will go from the cursor to the end of the line."
  (interactive)
  (let ((orig-point (point)))
    (setq endm 0)
    (if mark-active
        (setq endm (mark))
      (setq endm (point-at-eol))
    )
    (setq command (concatenate 'string "java -jar " rhino-jar "/js.jar " beautify-dir  "/beautify-cl.js -i 4 -p -d " beautify-dir ))
    (shell-command-on-region (point)
                             endm
                             command  nil t)
    (goto-char orig-point)))
 (defun js-beautify-buffer ()
  "Beautify the buffer using the code from jsbeautify.org"
  (interactive)
  (let ((orig-point (point)))
    (setq command (concatenate 'string "java -jar " rhino-jar "/js.jar " beautify-dir  "/beautify-cl.js -i 4 -p -d " beautify-dir ))
    (shell-command-on-region (point-min) (point-max) command  nil t)
    (goto-char orig-point)))

 (provide 'js-beautify)

Thanks! I just updated to use the python version.

Shameless plug: https://sethmason.com/2011/04/28/beautify-your-javascript-in-emacs.html

Shameless plug: http://sethmason.com/2011/04/28/jsbeautify-in-emacs.html

correct link : https://sethmason.com/2011/04/28/beautify-your-javascript-in-emacs.html

@yashasolutions Thanks! Updated my comment.