js2-mode is awesome

modules/prelude-js.el

@@ -32,17 +32,26 @@
 
 ;;; Code:
 
+(prelude-require-package 'js2-mode)
 (require 'prelude-programming)
 
-(eval-after-load 'js-mode
+(require 'js2-mode)
+
+(add-to-list 'auto-mode-alist '("\\.js\\'"    . js2-mode))
+(add-to-list 'auto-mode-alist '("\\.pac\\'"   . js2-mode))
+(add-to-list 'interpreter-mode-alist '("node" . js2-mode))
+
+(eval-after-load 'js2-mode
   '(progn
      (defun prelude-js-mode-defaults ()
        ;; electric-layout-mode doesn't play nice with smartparens
-       (setq-local electric-layout-rules '((?\; . after))))
+       (setq-local electric-layout-rules '((?\; . after)))
+       (setq mode-name "JS2")
+       (js2-imenu-extras-mode +1))
 
      (setq prelude-js-mode-hook 'prelude-js-mode-defaults)
 
-     (add-hook 'js-mode-hook (lambda () (run-hooks 'prelude-js-mode-hook)))))
+     (add-hook 'js2-mode-hook (lambda () (run-hooks 'prelude-js-mode-hook)))))
 
 (provide 'prelude-js)