Only restyle viewport-relative nodes on viewport size change

1 files changed, 8 insertions, 2 deletions

diff --git a/components/layout_thread/lib.rs b/components/layout_thread/lib.rs
index fe1f82f533b..e670d214e03 100644
--- a/components/layout_thread/lib.rs
+++ b/components/layout_thread/lib.rs
@@ -1072,9 +1072,15 @@ impl LayoutThread {
                        .send(ConstellationMsg::ViewportConstrained(self.id, constraints))
                        .unwrap();
             }
-            // FIXME (#10104): Only dirty nodes affected by vh/vw/vmin/vmax styles.
             if data.document_stylesheets.iter().any(|sheet| sheet.dirty_on_viewport_size_change) {
-                needs_dirtying = true;
+                for node in node.traverse_preorder() {
+                    if node.needs_dirty_on_viewport_size_changed() {
+                        node.dirty_self();
+                        node.dirty_descendants();
+                        // TODO(shinglyu): We can skip the traversal if the descendants were already
+                        // dirtied
+                    }
+                }
             }
         }