diff --git a/vim/syntax/pangloss_javascript_custom.vim b/vim/syntax/pangloss_javascript_custom.vim
index bd42130..452b267 100644
--- a/vim/syntax/pangloss_javascript_custom.vim
+++ b/vim/syntax/pangloss_javascript_custom.vim
@@ -54,8 +54,10 @@ syntax keyword jsFrom               contained from skipwhite skipempty nextgroup
 syntax match   jsModuleComma        contained /,/ skipwhite skipempty nextgroup=jsModuleKeyword,jsModuleAsterisk,jsModuleGroup,jsFlowTypeKeyword
 
 " Strings, Templates, Numbers
-syntax region  jsString           start=+"+  skip=+\\\("\|$\)+  end=+"\|$+  contains=jsSpecial,@Spell,htmlTag,htmlEndTag,cssClassRegion,cssIdRegion,htmlArgRegion extend
-syntax region  jsString           start=+'+  skip=+\\\('\|$\)+  end=+'\|$+  contains=jsSpecial,@Spell,htmlTag,htmlEndTag,cssClassRegion,cssIdRegion,htmlArgRegion extend
+syntax match   jsCssClassName     "\.-\=[A-Za-z_][A-Za-z0-9_-]*" contained
+syntax match   jsCssIdentifier     "#-\=[A-Za-z_][A-Za-z0-9_-]*" contained
+syntax region  jsString           start=+"+  skip=+\\\("\|$\)+  end=+"\|$+  contains=jsSpecial,@Spell,htmlTag,htmlEndTag,cssClassRegion,cssIdRegion,htmlArgRegion,jsCssClassName,jsCssIdentifier extend
+syntax region  jsString           start=+'+  skip=+\\\('\|$\)+  end=+'\|$+  contains=jsSpecial,@Spell,htmlTag,htmlEndTag,cssClassRegion,cssIdRegion,htmlArgRegion,jsCssClassName,jsCssIdentifier extend
 syntax region  jsTemplateString   start=+`+  skip=+\\\(`\|$\)+  end=+`+     contains=jsTemplateExpression,jsSpecial,@Spell extend
 syntax match   jsTaggedTemplate   /\k\+\%(`\)\@=/ nextgroup=jsTemplateString
 syntax match   jsNumber           /\<\d\+\%([eE][+-]\=\d\+\)\=\>\|\<0[bB][01]\+\>\|\<0[oO]\o\+\>\|\<0[xX]\x\+\>/
@@ -381,6 +383,9 @@ if version >= 508 || !exists("did_javascript_syn_inits")
 
   HiLink jsCssStyles            Label
 
+  HiLink jsCssClassName         cssClassName
+  HiLink jsCssIdentifier        cssIdentifier
+
   delcommand HiLink
 endif