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LibWeb: Verify element namespace in DOM::create_element()

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Psychpsyo 2025-01-09 21:36:40 +01:00 committed by Jelle Raaijmakers
parent 00ed797627
commit 19f97472eb
1 changed files with 7 additions and 5 deletions
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12
Libraries/LibWeb/DOM/ElementFactory.cpp
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@ -576,16 +576,18 @@ WebIDL::ExceptionOr<GC::Ref<Element>> create_element(Document& document, FlyStri
// 2. Set result to the result of constructing C, with no arguments.
auto result = TRY(WebIDL::construct(constructor));
// FIXME: 3. Assert: result’s custom element state and custom element definition are initialized.
// FIXME: 4. Assert: result’s namespace is the HTML namespace.
// Spec Note: IDL enforces that result is an HTMLElement object, which all use the HTML namespace.
// IDL does not currently convert the object for us, so we will have to do it here.
// NOTE: IDL does not currently convert the object for us, so we will have to do it here.
if (!result.has_value() || !result->is_object() || !is<HTML::HTMLElement>(result->as_object()))
return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "HTMLElement"sv);
GC::Ref<HTML::HTMLElement> element = verify_cast<HTML::HTMLElement>(result->as_object());
// FIXME: 3. Assert: result’s custom element state and custom element definition are initialized.
// 4. Assert: result’s namespace is the HTML namespace.
// Spec Note: IDL enforces that result is an HTMLElement object, which all use the HTML namespace.
VERIFY(element->namespace_uri() == Namespace::HTML);
// 5. If result’s attribute list is not empty, then throw a "NotSupportedError" DOMException.
if (element->has_attributes())
return JS::throw_completion(WebIDL::NotSupportedError::create(realm, "Synchronously created custom element cannot have attributes"_string));