1 files changed, 40 insertions, 0 deletions
diff --git a/dom/html/ElementInternals.h b/dom/html/ElementInternals.h
new file mode 100644
index 0000000000..b62a27ff18
--- /dev/null
+++ b/dom/html/ElementInternals.h
@@ -0,0 +1,40 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_ElementInternals_h
+#define mozilla_dom_ElementInternals_h
+
+#include "js/TypeDecls.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsGenericHTMLElement.h"
+#include "nsWrapperCache.h"
+
+namespace mozilla {
+namespace dom {
+
+class ElementInternals final : public nsISupports, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(ElementInternals)
+
+  explicit ElementInternals(nsGenericHTMLElement* aTarget);
+
+  nsISupports* GetParentObject();
+
+  virtual JSObject* WrapObject(JSContext* aCx,
+                               JS::Handle<JSObject*> aGivenProto) override;
+
+ private:
+  ~ElementInternals() = default;
+
+  // It's a target element which is a custom element.
+  RefPtr<nsGenericHTMLElement> mTarget;
+};
+
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // mozilla_dom_ElementInternals_h