diff --git a/Userland/Libraries/LibWeb/DOM/Element.cpp b/Userland/Libraries/LibWeb/DOM/Element.cpp
index 13b81e587b..aa26166e03 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Element.cpp
@@ -639,6 +639,12 @@ bool Element::is_target() const
     return document().target_element() == this;
 }
 
+// https://dom.spec.whatwg.org/#document-element
+bool Element::is_document_element() const
+{
+    return document().document_element() == this;
+}
+
 JS::NonnullGCPtr<HTMLCollection> Element::get_elements_by_class_name(DeprecatedFlyString const& class_names)
 {
     Vector<FlyString> list_of_class_names;
diff --git a/Userland/Libraries/LibWeb/DOM/Element.h b/Userland/Libraries/LibWeb/DOM/Element.h
index 2de7d0eb9e..f25897fcd7 100644
--- a/Userland/Libraries/LibWeb/DOM/Element.h
+++ b/Userland/Libraries/LibWeb/DOM/Element.h
@@ -169,6 +169,7 @@ public:
     bool is_focused() const;
     bool is_active() const;
     bool is_target() const;
+    bool is_document_element() const;
 
     JS::NonnullGCPtr<HTMLCollection> get_elements_by_class_name(DeprecatedFlyString const&);