diff --git a/emacs/.emacs.d/init.org b/emacs/.emacs.d/init.org
index a5d2bcc..95e2669 100644
--- a/emacs/.emacs.d/init.org
+++ b/emacs/.emacs.d/init.org
@@ -1616,6 +1616,20 @@ Computing Environment".
      (add-hook 'org-mode-hook 'org-bullets-mode)
    #+END_SRC
 
+** Grep
+
+   Make searching for "js" include ~*.js~, ~*.jsx~ and ~*.json~ files.
+
+   #+BEGIN_SRC emacs-lisp
+     (add-to-list 'grep-files-aliases '("js" . "*.js *.jsx *.json"))
+   #+END_SRC
+
+   Make searching for "css" include ~*.css~, ~*.less~, ~*.sass~ and
+   ~*.scss~ files.
+
+   #+BEGIN_SRC emacs-lisp
+     (add-to-list 'grep-files-aliases '("css" . "*.css *.less *.sass *.scss"))
+   #+END_SRC
 * Custom
 
   Put the customize settings in a different file so that Emacs doesn't