Automatically enable prettier when .prettierrc is present at git root

.emacs.d/init.el

@@ -898,6 +898,14 @@
   :config
   (company-auctex-init))
 
+(use-package prettier-js
+  :hook ((js2-mode typescript-mode web-mode) . prettier-js-mode-maybe)
+  :init
+  (defun prettier-js-mode-maybe ()
+    (interactive)
+    (when (file-exists-p (concat (magit-toplevel) ".prettierrc"))
+      (prettier-js-mode t))))
+
 ;;; Local Variables
 (add-to-list 'safe-local-eval-forms '(outline-hide-body))
 ;; Local Variables: