bug#60503: 29.0.60; js-ts-mode has inconsistent features/fontification wrt other ts major-modes

bug#60503: 29.0.60; js-ts-mode has inconsistent features/fontification wrt other ts major-modes

[Jostein Kjønigsen]

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js-ts-mode does not adhere to the "standardized" features and 
fontification levels requested in emacs-devel.

It's overall pretty good, but I did find one minor inconsistency which 
annoyed me enough to (IMO) warrant an update:

js-ts-mode does not highlight incoming parameters in 
functions/methods/arrow-expressions as variables.

Attached is a patch which fixes this issue and makes it much more 
consistent with csharp-ts-mode, tsx-ts-mode and typescript-ts-mode.

--


In GNU Emacs 29.0.60 (build 7, x86_64-pc-linux-gnu, GTK+ Version
  3.24.34, cairo version 1.16.0) of 2023-01-01 built on ThinkPad-T14s
Repository revision: f12f72b0e09c7a45098955c1304499963a5eb9a7
Repository branch: emacs-29
Windowing system distributor 'The X.Org Foundation', version 11.0.12201003
System Description: Ubuntu 22.10

Configured using:
  'configure --with-json --with-tree-sitter'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NOTIFY
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Important settings:
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   value of $LC_NUMERIC: nb_NO.UTF-8
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Major mode: Magit

Minor modes in effect:
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Load-path shadows:
/home/jostein/.emacs.d/elpa/transient-20221202.1727/transient hides 
/home/jostein/build/emacs/lisp/transient

Features:
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powershell-autoloads dap-mode-autoloads lsp-docker-autoloads
yaml-autoloads lsp-treemacs-autoloads treemacs-autoloads cfrs-autoloads
posframe-autoloads hydra-autoloads pfuture-autoloads
ace-window-autoloads avy-autoloads bui-autoloads lsp-mode-autoloads
lv-autoloads markdown-mode-autoloads spinner-autoloads ht-autoloads
git-commit-autoloads transient-autoloads compat-autoloads
cmake-mode-autoloads shrink-path-autoloads f-autoloads info
dash-autoloads s-autoloads popup-autoloads queue-autoloads package
browse-url url url-proxy url-privacy url-expand url-methods url-history
url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs password-cache
json subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs
cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode lisp-mode prog-mode register
page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
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cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
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code-pages mule custom widget keymap hashtable-print-readable backquote
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font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
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Memory information:
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  (symbols 48 47016 24)
  (strings 32 203095 12541)
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-- 
Vennlig hilsen
*Jostein Kjønigsen*

jostein@kjonigsen.net 🍵 jostein@gmail.com
https://jostein.kjønigsen.no <https://jostein.kjønigsen.no>

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[-- Attachment #2: 0003-lisp-progmodes-js.el-Improve-fontification-consisten.patch --]
[-- Type: text/x-patch, Size: 1143 bytes --]

From 4f3996bbe15dae049a0560a1e7ffe3560a7e0eae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jostein=20Kj=C3=B8nigsen?= <jostein@kjonigsen.net>
Date: Mon, 2 Jan 2023 21:26:36 +0100
Subject: [PATCH 3/3] lisp/progmodes/js.el: Improve fontification consistency

- Highlight declared parameters in functions, methods and
  arrow-expressions as variables.
---
 lisp/progmodes/js.el | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index c5fdecae71b..050472002bb 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -3521,6 +3521,15 @@ js--treesit-font-lock-settings
      (method_definition
       name: (property_identifier) @font-lock-function-name-face)
 
+     (method_definition
+      parameters: (formal_parameters (identifier) @font-lock-variable-name-face))
+
+     (arrow_function
+      parameters: (formal_parameters (identifier) @font-lock-variable-name-face))
+
+     (function_declaration
+      parameters: (formal_parameters (identifier) @font-lock-variable-name-face))
+
      (variable_declarator
       name: (identifier) @font-lock-variable-name-face)
 
-- 
2.37.2

bug#60503: 29.0.60; js-ts-mode has inconsistent features/fontification wrt other ts major-modes

[Theodor Thornhill via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Jostein Kjønigsen <jostein@secure.kjonigsen.net> writes:

> js-ts-mode does not adhere to the "standardized" features and 
> fontification levels requested in emacs-devel.
>
> It's overall pretty good, but I did find one minor inconsistency which 
> annoyed me enough to (IMO) warrant an update:
>
> js-ts-mode does not highlight incoming parameters in 
> functions/methods/arrow-expressions as variables.
>
> Attached is a patch which fixes this issue and makes it much more 
> consistent with csharp-ts-mode, tsx-ts-mode and typescript-ts-mode.
>

Looks good to me :-)

Theo

bug#60503: 29.0.60; js-ts-mode has inconsistent features/fontification wrt other ts major-modes

[Yuan Fu]

Theodor Thornhill <theo@thornhill.no> writes:

> Jostein Kjønigsen <jostein@secure.kjonigsen.net> writes:
>
>> js-ts-mode does not adhere to the "standardized" features and 
>> fontification levels requested in emacs-devel.
>>
>> It's overall pretty good, but I did find one minor inconsistency which 
>> annoyed me enough to (IMO) warrant an update:
>>
>> js-ts-mode does not highlight incoming parameters in 
>> functions/methods/arrow-expressions as variables.
>>
>> Attached is a patch which fixes this issue and makes it much more 
>> consistent with csharp-ts-mode, tsx-ts-mode and typescript-ts-mode.
>>
>
> Looks good to me :-)
>
> Theo

Great! I applied the patch.

Yuan