From: Liam Hupfer <liam@hpfr.net>
Date: Thu, 26 Jun 2025 03:47:34 +0000 (-0500)
Subject: bug#78901: [PATCH] js-ts-mode: Fix auto-mode-alist regexp
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bug#78901: [PATCH] js-ts-mode: Fix auto-mode-alist regexp

Align the js-ts-mode entry with the javascript-mode entries in the
default auto-mode-alist value in lisp/files.el. Otherwise, js-ts-mode is
not associated with .js files.

* lisp/progmodes/js.el (js-ts-mode): Fix auto-mode-alist regexp.

Fixes: 2023-01-20 6b2f85caa6ca "Make tree-sitter based modes optional"
---

diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index 3e789218fde..edb77db9bfe 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -3961,7 +3961,7 @@ See `treesit-thing-settings' for more information.")
     (treesit-major-mode-setup)
 
     (add-to-list 'auto-mode-alist
-                 '("\\(\\.js[mx]\\|\\.har\\)\\'" . js-ts-mode))))
+                 '("\\(\\.js[mx]?\\|\\.har\\)\\'" . js-ts-mode))))
 
 (derived-mode-add-parents 'js-ts-mode '(js-mode))