diff --git a/crates/web-sys/tests/wasm/location.rs b/crates/web-sys/tests/wasm/location.rs
new file mode 100644
index 00000000..d6193a67
--- /dev/null
+++ b/crates/web-sys/tests/wasm/location.rs
@@ -0,0 +1,56 @@
+use wasm_bindgen_test::*;
+use web_sys::Window;
+
+#[wasm_bindgen_test]
+fn href() {
+    let loc = Window::location();
+    loc.href().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn origin() {
+    let loc = Window::location();
+    loc.origin().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn protocol() {
+    let loc = Window::location();
+    loc.protocol().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn host() {
+    let loc = Window::location();
+    loc.host().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn hostname() {
+    let loc = Window::location();
+    loc.hostname().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn port() {
+    let loc = Window::location();
+    loc.port().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn pathname() {
+    let loc = Window::location();
+    loc.pathname().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn search() {
+    let loc = Window::location();
+    loc.search().unwrap();
+}
+
+#[wasm_bindgen_test]
+fn hash() {
+    let loc = Window::location();
+    loc.hash().unwrap();
+}
diff --git a/crates/web-sys/tests/wasm/main.rs b/crates/web-sys/tests/wasm/main.rs
index 2f21cde6..05537755 100644
--- a/crates/web-sys/tests/wasm/main.rs
+++ b/crates/web-sys/tests/wasm/main.rs
@@ -52,3 +52,4 @@ pub mod title_element;
 pub mod xpath_result;
 pub mod dom_point;
 pub mod performance;
+pub mod location;
diff --git a/crates/webidl/src/first_pass.rs b/crates/webidl/src/first_pass.rs
index 8c12ed47..39534791 100644
--- a/crates/webidl/src/first_pass.rs
+++ b/crates/webidl/src/first_pass.rs
@@ -44,7 +44,7 @@ pub(crate) struct InterfaceData<'src> {
     pub(crate) consts: Vec<&'src ConstMember<'src>>,
     pub(crate) operations: BTreeMap<OperationId<'src>, OperationData<'src>>,
     pub(crate) superclass: Option<&'src str>,
-    pub(crate) definition_attributes: Option<&'src [ExtendedAttribute<'src>]>,
+    pub(crate) definition_attributes: Option<&'src ExtendedAttributeList<'src>>,
 }
 
 /// We need to collect mixin data during the first pass, to be used later.
@@ -55,6 +55,7 @@ pub(crate) struct MixinData<'src> {
     pub(crate) attributes: Vec<&'src AttributeMixinMember<'src>>,
     pub(crate) consts: Vec<&'src ConstMember<'src>>,
     pub(crate) operations: BTreeMap<OperationId<'src>, OperationData<'src>>,
+    pub(crate) definition_attributes: Option<&'src ExtendedAttributeList<'src>>,
 }
 
 /// We need to collect namespace data during the first pass, to be used later.
@@ -300,8 +301,7 @@ impl<'src> FirstPass<'src, ()> for weedle::InterfaceDefinition<'src> {
                 .or_default();
             interface_data.partial = false;
             interface_data.superclass = self.inheritance.map(|s| s.identifier.0);
-            interface_data.definition_attributes = self.attributes.as_ref()
-                .map(|l| &l.body.list[..]);
+            interface_data.definition_attributes = self.attributes.as_ref();
         }
         if let Some(attrs) = &self.attributes {
             for attr in attrs.body.list.iter() {
@@ -510,6 +510,7 @@ impl<'src> FirstPass<'src, ()> for weedle::InterfaceMixinDefinition<'src>{
                 .entry(self.identifier.0)
                 .or_default();
             mixin_data.partial = false;
+            mixin_data.definition_attributes = self.attributes.as_ref();
         }
 
         for member in &self.members.body {
diff --git a/crates/webidl/src/lib.rs b/crates/webidl/src/lib.rs
index aed5c584..aec8d42f 100644
--- a/crates/webidl/src/lib.rs
+++ b/crates/webidl/src/lib.rs
@@ -330,7 +330,7 @@ impl<'src> FirstPassRecord<'src> {
         );
 
         let kind = backend::ast::ImportFunctionKind::Normal;
-        for mut import_function in self.create_imports(kind, id, data) {
+        for mut import_function in self.create_imports(None, kind, id, data) {
             import_function.doc_comment = Some(doc_comment.clone());
             module.imports.push(
                 backend::ast::Import {
@@ -413,11 +413,12 @@ impl<'src> FirstPassRecord<'src> {
             self.member_attribute(
                 program,
                 name,
-                &member.attributes,
                 member.modifier,
                 member.readonly.is_some(),
                 &member.type_,
                 member.identifier.0,
+                &member.attributes,
+                data.definition_attributes,
             );
         }
 
@@ -432,7 +433,6 @@ impl<'src> FirstPassRecord<'src> {
                 self.member_attribute(
                     program,
                     name,
-                    &member.attributes,
                     if let Some(s) = member.stringifier {
                         Some(weedle::interface::StringifierOrInheritOrStatic::Stringifier(s))
                     } else {
@@ -441,6 +441,8 @@ impl<'src> FirstPassRecord<'src> {
                     member.readonly.is_some(),
                     &member.type_,
                     member.identifier.0,
+                    &member.attributes,
+                    mixin_data.definition_attributes,
                 );
             }
         }
@@ -450,11 +452,12 @@ impl<'src> FirstPassRecord<'src> {
         &self,
         program: &mut backend::ast::Program,
         self_name: &'src str,
-        attrs: &'src Option<ExtendedAttributeList>,
         modifier: Option<weedle::interface::StringifierOrInheritOrStatic>,
         readonly: bool,
         type_: &'src weedle::types::AttributedType<'src>,
         identifier: &'src str,
+        attrs: &'src Option<ExtendedAttributeList<'src>>,
+        container_attrs: Option<&'src ExtendedAttributeList<'src>>,
     ) {
         use weedle::interface::StringifierOrInheritOrStatic::*;
 
@@ -465,8 +468,6 @@ impl<'src> FirstPassRecord<'src> {
             None => false,
         };
 
-        let is_structural = util::is_structural(attrs);
-        let throws = util::throws(attrs);
         let global = self
             .interfaces
             .get(self_name)
@@ -478,9 +479,9 @@ impl<'src> FirstPassRecord<'src> {
             &type_.type_,
             self_name,
             is_static,
-            is_structural,
-            throws,
             global,
+            attrs,
+            container_attrs,
         ) {
             program.imports.push(wrap_import_function(import_function));
         }
@@ -488,12 +489,12 @@ impl<'src> FirstPassRecord<'src> {
         if !readonly {
             for import_function in self.create_setter(
                 identifier,
-                type_.type_.clone(),
+                &type_.type_,
                 self_name,
                 is_static,
-                is_structural,
-                throws,
                 global,
+                attrs,
+                container_attrs,
             ) {
                 program.imports.push(wrap_import_function(import_function));
             }
@@ -533,7 +534,8 @@ impl<'src> FirstPassRecord<'src> {
                 import_function_kind(backend::ast::OperationKind::IndexingDeleter)
             }
         };
-        for method in self.create_imports(kind, id, op_data) {
+        let attrs = data.definition_attributes;
+        for method in self.create_imports(attrs, kind, id, op_data) {
             program.imports.push(wrap_import_function(method));
         }
     }
diff --git a/crates/webidl/src/util.rs b/crates/webidl/src/util.rs
index b91478f9..50e59dc6 100644
--- a/crates/webidl/src/util.rs
+++ b/crates/webidl/src/util.rs
@@ -299,9 +299,9 @@ impl<'src> FirstPassRecord<'src> {
         ty: &weedle::types::Type<'src>,
         self_name: &str,
         is_static: bool,
-        is_structural: bool,
-        catch: bool,
         global: bool,
+        attrs: &Option<ExtendedAttributeList>,
+        container_attrs: Option<&ExtendedAttributeList>,
     ) -> Option<backend::ast::ImportFunction> {
         let kind = backend::ast::OperationKind::Getter(Some(raw_ident(name)));
         let kind = self.import_function_kind(self_name, global, is_static, kind);
@@ -312,8 +312,8 @@ impl<'src> FirstPassRecord<'src> {
             None.into_iter(),
             &ret,
             kind,
-            is_structural,
-            catch,
+            is_structural(attrs.as_ref(), container_attrs),
+            throws(attrs),
             Some(format!("The `{}` getter\n\n{}", name, mdn_doc(self_name, Some(name))))
         )
     }
@@ -322,12 +322,12 @@ impl<'src> FirstPassRecord<'src> {
     pub fn create_setter(
         &self,
         name: &str,
-        field_ty: weedle::types::Type<'src>,
+        field_ty: &weedle::types::Type<'src>,
         self_name: &str,
         is_static: bool,
-        is_structural: bool,
-        catch: bool,
         global: bool,
+        attrs: &Option<ExtendedAttributeList>,
+        container_attrs: Option<&ExtendedAttributeList>,
     ) -> Option<backend::ast::ImportFunction> {
         let kind = backend::ast::OperationKind::Setter(Some(raw_ident(name)));
         let kind = self.import_function_kind(self_name, global, is_static, kind);
@@ -338,8 +338,8 @@ impl<'src> FirstPassRecord<'src> {
             Some((name, &field_ty)).into_iter(),
             &IdlType::Void,
             kind,
-            is_structural,
-            catch,
+            is_structural(attrs.as_ref(), container_attrs),
+            throws(attrs),
             Some(format!("The `{}` setter\n\n{}", name, mdn_doc(self_name, Some(name))))
         )
     }
@@ -372,6 +372,7 @@ impl<'src> FirstPassRecord<'src> {
 
     pub fn create_imports(
         &self,
+        container_attrs: Option<&ExtendedAttributeList<'src>>,
         kind: backend::ast::ImportFunctionKind,
         id: &OperationId<'src>,
         data: &OperationData<'src>,
@@ -552,7 +553,7 @@ impl<'src> FirstPassRecord<'src> {
                     .map(|(ty, orig_arg)| (orig_arg.name, ty)),
                 &ret_ty,
                 kind.clone(),
-                force_structural || is_structural(&signature.orig.attrs),
+                force_structural || is_structural(signature.orig.attrs.as_ref(), container_attrs),
                 force_throws || throws(&signature.orig.attrs),
                 None,
             ));
@@ -562,7 +563,7 @@ impl<'src> FirstPassRecord<'src> {
 }
 
 /// Search for an attribute by name in some webidl object's attributes.
-fn has_named_attribute(list: &Option<ExtendedAttributeList>, attribute: &str) -> bool {
+fn has_named_attribute(list: Option<&ExtendedAttributeList>, attribute: &str) -> bool {
     let list = match list {
         Some(list) => list,
         None => return false,
@@ -575,22 +576,26 @@ fn has_named_attribute(list: &Option<ExtendedAttributeList>, attribute: &str) ->
 
 /// ChromeOnly is for things that are only exposed to privileged code in Firefox.
 pub fn is_chrome_only(ext_attrs: &Option<ExtendedAttributeList>) -> bool {
-    has_named_attribute(ext_attrs, "ChromeOnly")
+    has_named_attribute(ext_attrs.as_ref(), "ChromeOnly")
 }
 
 /// Whether a webidl object is marked as a no interface object.
 pub fn is_no_interface_object(ext_attrs: &Option<ExtendedAttributeList>) -> bool {
-    has_named_attribute(ext_attrs, "NoInterfaceObject")
+    has_named_attribute(ext_attrs.as_ref(), "NoInterfaceObject")
 }
 
 /// Whether a webidl object is marked as structural.
-pub fn is_structural(attrs: &Option<ExtendedAttributeList>) -> bool {
-    has_named_attribute(attrs, "Unforgeable")
+pub fn is_structural(
+    item_attrs: Option<&ExtendedAttributeList>,
+    container_attrs: Option<&ExtendedAttributeList>,
+) -> bool {
+    has_named_attribute(item_attrs, "Unforgeable") ||
+        has_named_attribute(container_attrs, "Unforgeable")
 }
 
 /// Whether a webidl object is marked as throwing.
 pub fn throws(attrs: &Option<ExtendedAttributeList>) -> bool {
-    has_named_attribute(attrs, "Throws")
+    has_named_attribute(attrs.as_ref(), "Throws")
 }
 
 /// Create a syn `pub` token