Commit: runtime(javascript): add 'Symbol' as a type; add 'void' as a reserved word

[Christian Brabandt]

runtime(javascript): add 'Symbol' as a type; add 'void' as a reserved word

Commit: https://github.com/vim/vim/commit/1fa6fed84628d2953bf9aa4558bb8a97b61219e1
Author: Ilia Dubovik <askdu...@gmail.com>
Date: Sun Jun 7 17:23:34 2026 +0000

runtime(javascript): add 'Symbol' as a type; add 'void' as a reserved word

closes: https://github.com/vim/vim/issues/20440

Signed-off-by: Ilia Dubovik <askdu...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/syntax/javascript.vim b/runtime/syntax/javascript.vim
index c910a668a..912f99a95 100644
--- a/runtime/syntax/javascript.vim
+++ b/runtime/syntax/javascript.vim
@@ -6,7 +6,7 @@
" Kevin Locke
" LongJohnCoder
" Devin Weaver
-" Last Change: 2026 Apr 26
+" Last Change: 2026 Jun 07

" tuning parameters:
" unlet javaScript_fold
@@ -59,7 +59,7 @@ syn keyword javaScriptConditional if else switch
syn keyword javaScriptRepeat while for do in of
syn keyword javaScriptBranch break continue
syn keyword javaScriptOperator new delete instanceof typeof
-syn keyword javaScriptType Array Boolean Date Function Number Object String RegExp
+syn keyword javaScriptType Array Boolean Date Function Number Object String RegExp Symbol
syn keyword javaScriptStatement return with await yield
syn keyword javaScriptBoolean true false
syn keyword javaScriptNull null undefined
@@ -70,7 +70,7 @@ syn keyword javaScriptMessage alert confirm prompt status
syn keyword javaScriptGlobal self window top parent
syn keyword javaScriptMember document event location
syn keyword javaScriptDeprecated escape unescape
-syn keyword javaScriptReserved abstract as boolean byte char class const debugger double enum export extends final float from goto implements import int interface let long native package private protected public short super synchronized throws transient var volatile async using
+syn keyword javaScriptReserved abstract as boolean byte char class const debugger double enum export extends final float from goto implements import int interface let long native package private protected public short super synchronized throws transient var void volatile async using
syn keyword javaScriptModifier static

syn cluster javaScriptEmbededExpr contains=javaScriptBoolean,javaScriptNull,javaScriptIdentifier,javaScriptStringD,javaScriptStringS,javaScriptStringT