[css-forms-1] Make optgroup display block (#13559)

lukewarlow · web-flow · commit 6d8cab9221f9 · 2026-02-25T16:40:51.000Z
diff --git a/css-forms-1/Overview.bs b/css-forms-1/Overview.bs
@@ -1022,6 +1022,7 @@ select option:not(:checked)::checkmark {
 }
 
 select optgroup {
+  display: block;
   /* font-weight makes optgroups visually distinct from options. */
   font-weight: bolder;
 }

Original file line number	Diff line number	Diff line change
`@@ -1022,6 +1022,7 @@ select option:not(:checked)::checkmark {`
`1022`	`1022`	`}`
`1023`	`1023`
`1024`	`1024`	`select optgroup {`
	`1025`	`+ display: block;`
`1025`	`1026`	`/* font-weight makes optgroups visually distinct from options. */`
`1026`	`1027`	`font-weight: bolder;`
`1027`	`1028`	`}`