diff --git a/Userland/Libraries/LibWeb/HTML/Window.cpp b/Userland/Libraries/LibWeb/HTML/Window.cpp
index 6b1fbc9e94..cb6d30caff 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Window.cpp
@@ -703,6 +703,13 @@ BrowsingContext* Window::browsing_context()
     return m_associated_document->browsing_context();
 }
 
+// https://html.spec.whatwg.org/multipage/nav-history-apis.html#window-navigable
+JS::GCPtr<Navigable> Window::navigable() const
+{
+    // A Window's navigable is the navigable whose active document is the Window's associated Document's, or null if there is no such navigable.
+    return Navigable::navigable_with_active_document(*m_associated_document);
+}
+
 // https://html.spec.whatwg.org/multipage/system-state.html#pdf-viewer-plugin-objects
 Vector<JS::NonnullGCPtr<Plugin>> Window::pdf_viewer_plugin_objects()
 {
diff --git a/Userland/Libraries/LibWeb/HTML/Window.h b/Userland/Libraries/LibWeb/HTML/Window.h
index 5f5f12baed..dcdbf161f0 100644
--- a/Userland/Libraries/LibWeb/HTML/Window.h
+++ b/Userland/Libraries/LibWeb/HTML/Window.h
@@ -20,6 +20,7 @@
 #include <LibWeb/HTML/CrossOrigin/CrossOriginPropertyDescriptorMap.h>
 #include <LibWeb/HTML/GlobalEventHandlers.h>
 #include <LibWeb/HTML/MimeType.h>
+#include <LibWeb/HTML/Navigable.h>
 #include <LibWeb/HTML/Plugin.h>
 #include <LibWeb/HTML/Scripting/ImportMap.h>
 #include <LibWeb/HTML/ScrollOptions.h>
@@ -82,6 +83,8 @@ public:
     BrowsingContext const* browsing_context() const;
     BrowsingContext* browsing_context();
 
+    JS::GCPtr<Navigable> navigable() const;
+
     size_t document_tree_child_browsing_context_count() const;
 
     ImportMap const& import_map() const { return m_import_map; }