layout: Ensure abs-pos elements establish block formatting contexts

1 files changed, 7 insertions, 0 deletions

diff --git a/components/layout/block.rs b/components/layout/block.rs
index 1f4eb92ea51..80c0fae2243 100644
--- a/components/layout/block.rs
+++ b/components/layout/block.rs
@@ -1682,6 +1682,13 @@ impl BlockFlow {
     /// Determines the type of formatting context this is. See the definition of
     /// `FormattingContextType`.
     pub fn formatting_context_type(&self) -> FormattingContextType {
+        if self
+            .base
+            .flags
+            .contains(FlowFlags::IS_ABSOLUTELY_POSITIONED)
+        {
+            return FormattingContextType::Other;
+        }
         if self.is_inline_flex_item() || self.is_block_flex_item() {
             return FormattingContextType::Other;
         }