diff --git a/Userland/Libraries/LibWeb/DOM/Document.cpp b/Userland/Libraries/LibWeb/DOM/Document.cpp
index 19b26b042b..f05487d8a3 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Document.cpp
@@ -2280,6 +2280,13 @@ void Document::did_stop_being_active_document_in_browsing_context(Badge<HTML::Br
     tear_down_layout_tree();
 }
 
+// https://w3c.github.io/editing/docs/execCommand/#querycommandsupported()
+bool Document::query_command_supported(String const& command) const
+{
+    dbgln("(STUBBED) Document::query_command_supported(command='{}')", command);
+    return false;
+}
+
 // https://html.spec.whatwg.org/multipage/scripting.html#appropriate-template-contents-owner-document
 JS::NonnullGCPtr<DOM::Document> Document::appropriate_template_contents_owner_document()
 {
diff --git a/Userland/Libraries/LibWeb/DOM/Document.h b/Userland/Libraries/LibWeb/DOM/Document.h
index fcab4c06b9..3a0ce51dfa 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.h
+++ b/Userland/Libraries/LibWeb/DOM/Document.h
@@ -443,6 +443,8 @@ public:
 
     void did_stop_being_active_document_in_browsing_context(Badge<HTML::BrowsingContext>);
 
+    bool query_command_supported(String const&) const;
+
 protected:
     virtual void visit_edges(Cell::Visitor&) override;
 
diff --git a/Userland/Libraries/LibWeb/DOM/Document.idl b/Userland/Libraries/LibWeb/DOM/Document.idl
index 2bd6063e00..1c667c7e84 100644
--- a/Userland/Libraries/LibWeb/DOM/Document.idl
+++ b/Userland/Libraries/LibWeb/DOM/Document.idl
@@ -98,6 +98,7 @@ interface Document : Node {
 
     attribute DOMString title;
 
+    boolean queryCommandSupported(DOMString commandId);
     readonly boolean hidden;
     readonly DOMString visibilityState;