Emacs customization (example)

Download espresso.el and put it somewhere in your load-path. Then add the following to your .emacs:

          (autoload #'espresso-mode "espresso" "Start espresso-mode" t)
          (add-to-list 'auto-mode-alist '("\\.js$" . espresso-mode))
          (add-to-list 'auto-mode-alist '("\\.json$" . espresso-mode))