LibWeb: Add fast_is<T>() for HTML::HTMLHtmlElement

Another one spotted in a scroll-up-and-down profile.

2 files changed, 9 insertions, 0 deletions

diff --git a/Userland/Libraries/LibWeb/DOM/Node.h b/Userland/Libraries/LibWeb/DOM/Node.h
index c1e02624f1..cc4fa09e84 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.h
+++ b/Userland/Libraries/LibWeb/DOM/Node.h
@@ -82,6 +82,7 @@ public:
 
     virtual bool is_editable() const;
 
+    virtual bool is_html_html_element() const { return false; }
     virtual bool is_html_template_element() const { return false; }
 
     ExceptionOr<NonnullRefPtr<Node>> pre_insert(NonnullRefPtr<Node>, RefPtr<Node>);
diff --git a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
index 3e689b5a5b..fac96b510b 100644
--- a/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
+++ b/Userland/Libraries/LibWeb/HTML/HTMLHtmlElement.h
@@ -18,6 +18,14 @@ public:
     virtual ~HTMLHtmlElement() override;
 
     bool should_use_body_background_properties() const;
+
+private:
+    virtual bool is_html_html_element() const override { return true; }
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLHtmlElement>() const { return is_html_html_element(); }
+}