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authorStefan Monnier <monnier@iro.umontreal.ca>2022-08-13 11:18:40 -0400
committerStefan Monnier <monnier@iro.umontreal.ca>2022-08-13 11:18:40 -0400
commit3fcbcc61db31e316115364cf6275effcbfdebc6f (patch)
treebbc422fdadb3210f95a9b02fc772bad29a03318e /lisp/progmodes/js.el
parent94c10c426e305037126cf75cc5cf23c9f8df4664 (diff)
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js.el: Tweak last change
* lisp/progmodes/js.el (js-json-mode): Use a function as value of `syntax-propertize-function`.
Diffstat (limited to 'lisp/progmodes/js.el')
-rw-r--r--lisp/progmodes/js.el7
1 files changed, 4 insertions, 3 deletions
diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index d2c24a75810..efad3b52aa9 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -3490,9 +3490,10 @@ This function is intended for use in `after-change-functions'."
;;;###autoload
(define-derived-mode js-json-mode js-mode "JSON"
- ;; JSON files can be big. Speed up syntax-ppss.
- (setq-local syntax-propertize-function nil)
- (setq-local js-enabled-frameworks nil))
+ (setq-local js-enabled-frameworks nil)
+ ;; Speed up `syntax-ppss': JSON files can be big but can't hold
+ ;; regexp matchers nor #! thingies (and `js-enabled-frameworks' is nil).
+ (setq-local syntax-propertize-function #'ignore))
;; Since we made JSX support available and automatically-enabled in
;; the base `js-mode' (for ease of use), now `js-jsx-mode' simply