Variable: js-json-mode-hook
js-json-mode-hook is a variable defined in js.el.gz.
Value
nil
Documentation
Hook run after entering JSON mode.
No problems result if this variable is not bound.
add-hook automatically binds it. (This is true for all hook variables.)
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/js.el.gz
;;;###autoload
(define-derived-mode js-json-mode js-mode "JSON"
(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))