Fix JS regexp literal syntax propertization in expressions

Bug#25465:
* lisp/progmodes/js.el (js-syntax-propertize): Recognize a regexp
literal after "!", "&", and "|".
test/lisp/progmodes/js-tests.el (js-mode-regexp-syntax): New test.

1 files changed, 2 insertions, 2 deletions

diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index 54df3913fc6..2e5c6ae119b 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -1720,10 +1720,10 @@ This performs fontification according to `js--class-styles'."
     ;; Distinguish /-division from /-regexp chars (and from /-comment-starter).
     ;; FIXME: Allow regexps after infix ops like + ...
     ;; https://developer.mozilla.org/en/JavaScript/Reference/Operators
-    ;; We can probably just add +, -, !, <, >, %, ^, ~, |, &, ?, : at which
+    ;; We can probably just add +, -, <, >, %, ^, ~, ?, : at which
     ;; point I think only * and / would be missing which could also be added,
     ;; but need care to avoid affecting the // and */ comment markers.
-    ("\\(?:^\\|[=([{,:;]\\|\\_<return\\_>\\)\\(?:[ \t]\\)*\\(/\\)[^/*]"
+    ("\\(?:^\\|[=([{,:;|&!]\\|\\_<return\\_>\\)\\(?:[ \t]\\)*\\(/\\)[^/*]"
      (1 (ignore
          (forward-char -1)
          (when (or (not (memq (char-after (match-beginning 0)) '(?\s ?\t)))