diff --git a/after/syntax/css/cssom-view.vim b/after/syntax/css/cssom-view.vim
new file mode 100644
index 0000000..e0ce6c6
--- /dev/null
+++ b/after/syntax/css/cssom-view.vim
@@ -0,0 +1,2 @@
+syn match cssFontProp contained "\<scroll-behavior\>"
+syn keyword cssFontAttr contained instant smooth
diff --git a/after/syntax/html.vim b/after/syntax/html.vim
index c6de7a9..965e376 100644
--- a/after/syntax/html.vim
+++ b/after/syntax/html.vim
@@ -48,4 +48,5 @@ syn include @htmlCss syntax/css/css-values.vim
 syn include @htmlCss syntax/css/css-variables.vim
 syn include @htmlCss syntax/css/css-will-change-1.vim
 syn include @htmlCss syntax/css/css-writing-modes-3.vim
+syn include @htmlCss syntax/css/cssom-view.vim
 syn include @htmlCss syntax/css/selectors4.vim
diff --git a/test/test.css b/test/test.css
index 8a45cd8..ab53cd3 100644
--- a/test/test.css
+++ b/test/test.css
@@ -161,6 +161,11 @@
   display: ethiopic-numeric;
 }
 
+.cssom-view {
+  scroll-behavior: instant;
+  display: smooth;
+}
+
 .display {
   box-suppress: flow;
   display: flow-root;
diff --git a/test/test.html b/test/test.html
index 173bfdb..2f5e478 100644
--- a/test/test.html
+++ b/test/test.html
@@ -184,6 +184,12 @@
 }
 </style>
 <style>
+.cssom-view {
+  scroll-behavior: instant;
+  display: smooth;
+}
+</style>
+<style>
 .display {
   box-suppress: flow;
   display: flow-root;