LibWeb: Add some fast_is<T> helpers for hot classes on GitHub :^)

2 files changed, 5 insertions, 0 deletions

diff --git a/Userland/Libraries/LibWeb/DOM/Node.h b/Userland/Libraries/LibWeb/DOM/Node.h
index 02d59dc6fb..4af2f3f720 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.h
+++ b/Userland/Libraries/LibWeb/DOM/Node.h
@@ -72,6 +72,7 @@ public:
     bool is_parent_node() const { return is_element() || is_document() || is_document_fragment(); }
     bool is_slottable() const { return is_element() || is_text(); }
     bool is_attribute() const { return type() == NodeType::ATTRIBUTE_NODE; }
+    virtual bool is_shadow_root() const { return false; }
 
     virtual bool requires_svg_container() const { return false; }
     virtual bool is_svg_container() const { return false; }
diff --git a/Userland/Libraries/LibWeb/DOM/ShadowRoot.h b/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
index 7ea5ca32ff..f550c0e5cb 100644
--- a/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
+++ b/Userland/Libraries/LibWeb/DOM/ShadowRoot.h
@@ -34,6 +34,7 @@ public:
 private:
     // ^Node
     virtual FlyString node_name() const override { return "#shadow-root"; }
+    virtual bool is_shadow_root() const final { return true; }
 
     // NOTE: The specification doesn't seem to specify a default value for closed. Assuming false for now.
     bool m_closed { false };
@@ -41,4 +42,7 @@ private:
     bool m_available_to_element_internals { false };
 };
 
+template<>
+inline bool Node::fast_is<ShadowRoot>() const { return is_shadow_root(); }
+
 }