1.8.1

https://www.w3.org/TR/2020/REC-css-contain-1-20201222/

after/syntax/css/fonts-4.vim

@@ -1,16 +1,19 @@
+syn match cssFontProp contained "\<font-synthesis\(-\(weight\|style\|small-caps\|settings\)\)\=\>"
+syn match cssFontProp contained "\<font-named-instance\>"
 syn match cssFontProp contained "\<font-display\>"
+syn match cssFontProp contained "\<\(ascent\|descent\|line-gap\)-override\>"
 syn match cssFontProp contained "\<font-optical-sizing\>"
 syn match cssFontProp contained "\<font-variation-settings\>"
 syn match cssFontProp contained "\<font-palette\>"
+syn match cssFontProp contained "\<font-variant-emoji\>"
 syn match cssFontProp contained "\<font-presentation\>"
 syn match cssFontProp contained "\<base-palette\>"
 syn match cssFontProp contained "\<override-color\>"
-syn match cssFontProp contained "\<font-variant-emoji\>"
-syn keyword cssFontAttr contained emoji math fangsong infinity swap fallback optional light dark
+syn keyword cssFontAttr contained emoji math fangsong swap fallback light dark
 syn match cssFontAttr contained "\<system-ui\>"
 syn match cssFontAttr contained "\<ui-\(\(sans-\)\=serif\|monospace\|rounded\)\>"
-syn match cssFontAttr contained "\<historical-forms\>"
 syn match cssFontAttr contained "\<xxx-large\>"
+syn match cssFontAttr contained "\<historical-forms\>"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
-" syn match cssFontDescriptor "@font-feature-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
+syn match cssFontDescriptor "@font-feature-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl
 syn match cssFontDescriptor "@font-palette-values\>" nextgroup=cssFontDescriptorBlock skipwhite skipnl

after/syntax/css/pseudo-4.vim

@@ -1,2 +1,3 @@
-syn match cssPseudoClassId contained "\<inactive-selection\>"
+syn match cssPseudoClassId contained "\<target-text\>"
 syn match cssPseudoClassId contained "\<\(spelling\|grammer\)-error\>"
+syn match cssPseudoClassId contained "\<file-selectors-button\>"

test/test.css

@@ -354,34 +354,47 @@
 }
 
 .fonts-4 {
+	font-synthesis-weight: auto;
+	font-synthesis-style: auto;
+	font-synthesis-small-caps: auto;
+	font-variation-settings: auto;
+	font-named-instance: auto;
 	font-display: auto;
+	ascent-override: auto;
+	descent-override: auto;
+	line-gap-override: auto;
 	font-optical-sizing: auto;
 	font-variation-settings: auto;
 	font-palette: auto;
-	font-presentation: auto;
 	font-variant-emoji: auto;
+	font-presentation: auto;
 	display: system-ui;
 	display: emoji;
 	display: math;
 	display: fangsong;
-	display: infinity;
-	display: stylistic(feature-value-name);
-	display: historical-forms;
-	display: styleset(feature-value-name #);
-	display: character-variant(feature-vlue-name #);
-	display: swash(feature-value-name);
-	display: ornaments(feature-value-name);
-	display: annotation(feature-value-name);
-	display: swap;
-	display: fallback;
-	display: optional;
-	display: light;
-	display: dark;
 	display: ui-serif;
 	display: ui-sans-serif;
 	display: ui-monospace;
 	display: ui-rounded;
 	display: xxx-large;
+	display: swap;
+	display: fallback;
+	display: historical-forms;
+	display: stylistic(feature-value-name);
+	display: styleset(feature-value-name #);
+	display: character-variant(feature-vlue-name #);
+	display: swash(feature-value-name);
+	display: ornaments(feature-value-name);
+	display: annotation(feature-value-name);
+	display: light;
+	display: dark;
+}
+
+@font-feature-values Test {
+	@swash {
+		swishy: 1;
+		flowing: 2;
+	}
 }
 
 @font-palette-values Test {
@@ -679,9 +692,10 @@ mask {
 	initial-value: auto;
 }
 
-.pseudo-4::inactive-selection,
+.pseudo-4::target-text,
 .pseudo-4::spelling-error,
-.pseudo-4::grammer-error {
+.pseudo-4::grammer-error,
+.pseudi-4::file-selectors-button {
 	display: auto;
 }