#include <AK/Array.h>
#include <AK/Optional.h>
#include <AK/String.h>
#include <AK/TypeCasts.h>
#include <AK/Utf16FlyString.h>
#include <AK/Utf16String.h>
#include <LibGC/Ptr.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/ArrayPrototype.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/PropertyKey.h>
#include <LibJS/Runtime/Realm.h>
#include <LibJS/Runtime/VM.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/HTMLElement.h>
#include <LibWeb/Bindings/HTMLFormElement.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Bindings/MainThreadVM.h>
#include <LibWeb/DOM/DOMTokenList.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/ElementFactory.h>
#include <LibWeb/HTML/CustomElements/CustomElementDefinition.h>
#include <LibWeb/HTML/CustomElements/CustomElementRegistry.h>
#include <LibWeb/HTML/HTMLElement.h>
#include <LibWeb/HTML/HTMLFormControlsCollection.h>
#include <LibWeb/HTML/HTMLFormElement.h>
#include <LibWeb/HTML/Scripting/SimilarOriginWindowAgent.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Tracing.h>
#include <LibWeb/WebIDL/Types.h>

namespace Web::Bindings {

void HTMLFormElementConstructor::initialize(JS::Realm& realm, JS::NativeFunction& object)
{
    auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;

    object.set_prototype(&ensure_web_constructor<HTMLElementPrototype>(realm, "HTMLElement"_fly_string));
    object.define_direct_property(vm.names.length, JS::Value(0), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.name, JS::PrimitiveString::create(vm, "HTMLFormElement"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<HTMLFormElementPrototype>(realm, "HTMLFormElement"_fly_string), 0);
}

JS::ThrowCompletionOr<GC::Ref<JS::Object>> HTMLFormElementConstructor::construct([[maybe_unused]] InterfaceConstructor& constructor, [[maybe_unused]] JS::FunctionObject& new_target)
{
    WebIDL::log_trace(constructor.vm(), "HTMLFormElementConstructor::construct");
    auto& vm = constructor.vm();
    auto& realm = *vm.current_realm();
    auto& window = as<HTML::Window>(HTML::current_global_object());

    // 1. If NewTarget is equal to the active function object, then throw a TypeError.
    if (&new_target == vm.active_function_object())
        return vm.throw_completion<JS::TypeError>("Cannot directly construct an HTML element, it must be inherited"_utf16);

    // 2. Let registry be null.
    GC::Ptr<HTML::CustomElementRegistry> registry;

    // 3. If the surrounding agent's active custom element constructor map[NewTarget] exists:
    auto& surrounding_agent = HTML::relevant_similar_origin_window_agent(window);
    if (auto registry_for_constructor = surrounding_agent.active_custom_element_constructor_map.get(GC::Ref { new_target }); registry_for_constructor.has_value() && !registry_for_constructor->is_null()) {
        // 1. Set registry to the surrounding agent's active custom element constructor map[NewTarget].
        registry = registry_for_constructor.value();

        // 2. Remove the surrounding agent's active custom element constructor map[NewTarget].
        surrounding_agent.active_custom_element_constructor_map.remove(GC::Ref { new_target });
    }
    // 4. Otherwise, set registry to current global object's associated Document's custom element registry.
    else {
        registry = window.associated_document().custom_element_registry();
    }

    // 5. Let definition be the item in registry's custom element definition set with constructor equal to NewTarget.
    //    If there is no such item, then throw a TypeError.
    auto definition = registry->get_definition_from_new_target(new_target);
    if (!definition)
        return vm.throw_completion<JS::TypeError>("There is no custom element definition assigned to the given constructor"_utf16);

    // 6. Let isValue be null.
    Optional<Utf16FlyString> is_value;

    // 7. If definition's local name is equal to definition's name (i.e., definition is for an autonomous custom element):
    if (definition->local_name() == definition->name()) {
        // 1. If the active function object is not HTMLElement, then throw a TypeError.
        return vm.throw_completion<JS::TypeError>("Autonomous custom elements can only inherit from HTMLElement"_utf16);
    }
    // 8. Otherwise (i.e., if definition is for a customized built-in element):
    else {
        // 1. Let valid local names be the list of local names for elements defined in this specification or in other applicable specifications that use the active function object as their element interface.
        static auto const& valid_local_names = *new auto(MUST(DOM::valid_local_names_for_given_html_element_interface("HTMLFormElement"sv)));

        // 2. If valid local names does not contain definition's local name, then throw a TypeError.
        if (!valid_local_names.contains_slow(definition->local_name()))
            return vm.throw_completion<JS::TypeError>(Utf16String::formatted("Local name '{}' of customized built-in element is not a valid local name for HTMLFormElement", definition->local_name()));

        // 3. Set isValue to definition's name.
        is_value = definition->name();
    }

    // 9. If definition's construction stack is empty:
    if (definition->construction_stack().is_empty()) {
        // 1. Let element be the result of internally creating a new object implementing the interface to which the active function object corresponds, given the current Realm Record and NewTarget.
        // 2. Set element's node document to the current global object's associated Document.
        // 3. Set element's namespace to the HTML namespace.
        // 4. Set element's namespace prefix to null.
        // 5. Set element's local name to definition's local name.
        auto element = realm.create<HTML::HTMLFormElement>(window.associated_document(), DOM::QualifiedName { definition->local_name(), {}, Namespace::HTML });

        // https://webidl.spec.whatwg.org/#internally-create-a-new-object-implementing-the-interface
        TRY(WebIDL::set_prototype_from_new_target<HTMLFormElementPrototype>(vm, new_target, "HTMLFormElement"_fly_string, *element));

        // 6. Set element's custom element registry to registry.
        element->set_custom_element_registry(registry);

        // 7. Set element's custom element state to "custom".
        // 8. Set element's custom element definition to definition.
        // 9. Set element's is value to isValue.
        element->setup_custom_element_from_constructor(*definition, is_value);

        // 10. Return element.
        return *element;
    }

    // 10. Let prototype be ? Get(NewTarget, "prototype").
    auto prototype = TRY(new_target.get(vm.names.prototype));

    // 11. If Type(prototype) is not Object, then:
    if (!prototype.is_object()) {
        // 1. Let realm be ? GetFunctionRealm(NewTarget).
        auto* function_realm = TRY(JS::get_function_realm(vm, new_target));

        // 2. Set prototype to the interface prototype object of realm whose interface is the same as the interface of the active function object.
        VERIFY(function_realm);
        prototype = &Bindings::ensure_web_prototype<HTMLFormElementPrototype>(*function_realm, "HTMLFormElement"_fly_string);
    }

    VERIFY(prototype.is_object());

    // 12. Let element be the last entry in definition's construction stack.
    auto& element = definition->construction_stack().last();

    // 13. If element is an already constructed marker, then throw a TypeError.
    if (element.has<HTML::AlreadyConstructedCustomElementMarker>())
        return vm.throw_completion<JS::TypeError>("Custom element has already been constructed"_utf16);

    // 14. Perform ? element.[[SetPrototypeOf]](prototype).
    auto actual_element = element.get<GC::Ref<DOM::Element>>();
    TRY(actual_element->internal_set_prototype_of(&prototype.as_object()));

    // 15. Replace the last entry in definition's construction stack with an already constructed marker.
    definition->construction_stack().last() = HTML::AlreadyConstructedCustomElementMarker {};

    // 16. Return element.
    return *actual_element;
}

GC_DEFINE_ALLOCATOR(HTMLFormElementPrototype);

HTMLFormElementPrototype::HTMLFormElementPrototype([[maybe_unused]] JS::Realm& realm)
    : Object(ConstructWithPrototypeTag::Tag, GC::Ref { ensure_web_prototype<HTMLElementPrototype>(realm, "HTMLElement"_fly_string) })
{
}

HTMLFormElementPrototype::~HTMLFormElementPrototype()
{
}


void HTMLFormElementPrototype::initialize(JS::Realm& realm)
{
    auto& object = *this;
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable | JS::Attribute::Configurable | JS::Attribute::Writable;

    object.set_prototype(GC::Ref { ensure_web_prototype<HTMLElementPrototype>(realm, "HTMLElement"_fly_string) });

    auto accept_charset_id = "acceptCharset"_utf16_fly_string;
    auto native_accept_charset_getter = JS::NativeFunction::create(realm, accept_charset_getter, 0, accept_charset_id, &realm, "get"sv);
    auto native_accept_charset_setter = JS::NativeFunction::create(realm, accept_charset_setter, 1, accept_charset_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto accept_charset_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(accept_charset_id, native_accept_charset_getter, native_accept_charset_setter, accept_charset_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto action_id = "action"_utf16_fly_string;
    auto native_action_getter = JS::NativeFunction::create(realm, action_getter, 0, action_id, &realm, "get"sv);
    auto native_action_setter = JS::NativeFunction::create(realm, action_setter, 1, action_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto action_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(action_id, native_action_getter, native_action_setter, action_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto autocomplete_id = "autocomplete"_utf16_fly_string;
    auto native_autocomplete_getter = JS::NativeFunction::create(realm, autocomplete_getter, 0, autocomplete_id, &realm, "get"sv);
    auto native_autocomplete_setter = JS::NativeFunction::create(realm, autocomplete_setter, 1, autocomplete_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto autocomplete_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(autocomplete_id, native_autocomplete_getter, native_autocomplete_setter, autocomplete_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto enctype_id = "enctype"_utf16_fly_string;
    auto native_enctype_getter = JS::NativeFunction::create(realm, enctype_getter, 0, enctype_id, &realm, "get"sv);
    auto native_enctype_setter = JS::NativeFunction::create(realm, enctype_setter, 1, enctype_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto enctype_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(enctype_id, native_enctype_getter, native_enctype_setter, enctype_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto encoding_id = "encoding"_utf16_fly_string;
    auto native_encoding_getter = JS::NativeFunction::create(realm, encoding_getter, 0, encoding_id, &realm, "get"sv);
    auto native_encoding_setter = JS::NativeFunction::create(realm, encoding_setter, 1, encoding_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto encoding_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(encoding_id, native_encoding_getter, native_encoding_setter, encoding_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto method_id = "method"_utf16_fly_string;
    auto native_method_getter = JS::NativeFunction::create(realm, method_getter, 0, method_id, &realm, "get"sv);
    auto native_method_setter = JS::NativeFunction::create(realm, method_setter, 1, method_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto method_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(method_id, native_method_getter, native_method_setter, method_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto name_id = "name"_utf16_fly_string;
    auto native_name_getter = JS::NativeFunction::create(realm, name_getter, 0, name_id, &realm, "get"sv);
    auto native_name_setter = JS::NativeFunction::create(realm, name_setter, 1, name_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto name_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(name_id, native_name_getter, native_name_setter, name_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto no_validate_id = "noValidate"_utf16_fly_string;
    auto native_no_validate_getter = JS::NativeFunction::create(realm, no_validate_getter, 0, no_validate_id, &realm, "get"sv);
    auto native_no_validate_setter = JS::NativeFunction::create(realm, no_validate_setter, 1, no_validate_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto no_validate_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(no_validate_id, native_no_validate_getter, native_no_validate_setter, no_validate_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto target_id = "target"_utf16_fly_string;
    auto native_target_getter = JS::NativeFunction::create(realm, target_getter, 0, target_id, &realm, "get"sv);
    auto native_target_setter = JS::NativeFunction::create(realm, target_setter, 1, target_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto target_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(target_id, native_target_getter, native_target_setter, target_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto rel_id = "rel"_utf16_fly_string;
    auto native_rel_getter = JS::NativeFunction::create(realm, rel_getter, 0, rel_id, &realm, "get"sv);
    auto native_rel_setter = JS::NativeFunction::create(realm, rel_setter, 1, rel_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto rel_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(rel_id, native_rel_getter, native_rel_setter, rel_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto rel_list_id = "relList"_utf16_fly_string;
    auto native_rel_list_getter = JS::NativeFunction::create(realm, rel_list_getter, 0, rel_list_id, &realm, "get"sv);
    auto native_rel_list_setter = JS::NativeFunction::create(realm, rel_list_setter, 1, rel_list_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto rel_list_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(rel_list_id, native_rel_list_getter, native_rel_list_setter, rel_list_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto elements_id = "elements"_utf16_fly_string;
    auto native_elements_getter = JS::NativeFunction::create(realm, elements_getter, 0, elements_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_elements_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto elements_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(elements_id, native_elements_getter, native_elements_setter, elements_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    auto length_id = "length"_utf16_fly_string;
    auto native_length_getter = JS::NativeFunction::create(realm, length_getter, 0, length_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_length_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto length_attributes = default_attributes;

    // 5. Let desc be the PropertyDescriptor{[[Get]]: getter, [[Set]]: setter, [[Enumerable]]: true, [[Configurable]]: configurable}.

    // 7. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_accessor(length_id, native_length_getter, native_length_setter, length_attributes);

    // 8. FIXME: If attr’s type is an observable array type with type argument T, then set target’s backing observable array exotic object for attr to the result of creating an observable array exotic object in realm, given T, attr’s set an indexed value algorithm, and attr’s delete an indexed value algorithm.
    object.define_native_function(realm, "submit"_utf16_fly_string, submit, 0, default_attributes);

    object.define_native_function(realm, "requestSubmit"_utf16_fly_string, request_submit, 0, default_attributes);

    object.define_native_function(realm, "reset"_utf16_fly_string, reset, 0, default_attributes);

    object.define_native_function(realm, "checkValidity"_utf16_fly_string, check_validity, 0, default_attributes);

    object.define_native_function(realm, "reportValidity"_utf16_fly_string, report_validity, 0, default_attributes);

    object.define_direct_property(vm.well_known_symbol_iterator(), realm.intrinsics().array_prototype()->get_without_side_effects(vm.names.values), JS::Attribute::Configurable | JS::Attribute::Writable);

    object.define_direct_property(vm.well_known_symbol_to_string_tag(), JS::PrimitiveString::create(vm, "HTMLFormElement"_utf16), JS::Attribute::Configurable);
    Base::initialize(realm);
}

void HTMLFormElementPrototype::define_unforgeable_attributes(JS::Realm& realm, [[maybe_unused]] JS::Object& object)
{
    [[maybe_unused]] auto& vm = realm.vm();
    [[maybe_unused]] u8 default_attributes = JS::Attribute::Enumerable;
}

[[maybe_unused]] static JS::ThrowCompletionOr<HTML::HTMLFormElement*> impl_from(JS::VM& vm, JS::Value js_value)
{

    if (auto impl = js_value.as_if<HTML::HTMLFormElement>())
        return impl.ptr();
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "HTMLFormElement");
}

[[maybe_unused]] static JS::ThrowCompletionOr<HTML::HTMLFormElement*> impl_from(JS::VM& vm)
{
    auto this_value = vm.this_value();
    if (this_value.is_nullish())
        this_value = &vm.current_realm()->global_object();
    return impl_from(vm, this_value);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::accept_charset_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::accept_charset_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute has the type DOMString:
    // 1. Let element be the result of running this's get the element.
    // 2. Let contentAttributeValue be the result of running this's get the content attribute.
    // 5. If contentAttributeValue is null, then return the empty string.
    // 6. Return contentAttributeValue.
    auto R = idl_object->get_attribute_value("accept-charset"_utf16_fly_string);

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::action_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::action_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->action(); }));

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::autocomplete_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::autocomplete_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute is an enumerated attribute:
    // 1. Let contentAttributeValue be the result of running this's get the content attribute.
    auto content_attribute_value = idl_object->attribute("autocomplete"_utf16_fly_string);

    // 2. If contentAttributeValue is null, then set contentAttributeValue to the missing value default.
    auto R = content_attribute_value.value_or("on"_utf16);
    auto did_set_to_missing_value = false;
    if (!content_attribute_value.has_value())
        did_set_to_missing_value = true;

    // 3. If contentAttributeValue is an ASCII case-insensitive match for one of the keywords, then return that keyword's canonical keyword.
    Array valid_values { "on"_utf16, "off"_utf16 };
    auto has_keyword = false;
    for (auto const& value : valid_values) {
        if (value.equals_ignoring_ascii_case(R)) {
            has_keyword = true;
            R = value;
            break;
        }
    }

    // 4. If contentAttributeValue is not a keyword and was not set to the missing value default, return the invalid value default.
    if (!has_keyword && !did_set_to_missing_value)
        R = "on"_utf16;

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::enctype_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::enctype_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute is an enumerated attribute:
    // 1. Let contentAttributeValue be the result of running this's get the content attribute.
    auto content_attribute_value = idl_object->attribute("enctype"_utf16_fly_string);

    // 2. If contentAttributeValue is null, then set contentAttributeValue to the missing value default.
    auto R = content_attribute_value.value_or("application/x-www-form-urlencoded"_utf16);
    auto did_set_to_missing_value = false;
    if (!content_attribute_value.has_value())
        did_set_to_missing_value = true;

    // 3. If contentAttributeValue is an ASCII case-insensitive match for one of the keywords, then return that keyword's canonical keyword.
    Array valid_values { "application/x-www-form-urlencoded"_utf16, "multipart/form-data"_utf16, "text/plain"_utf16 };
    auto has_keyword = false;
    for (auto const& value : valid_values) {
        if (value.equals_ignoring_ascii_case(R)) {
            has_keyword = true;
            R = value;
            break;
        }
    }

    // 4. If contentAttributeValue is not a keyword and was not set to the missing value default, return the invalid value default.
    if (!has_keyword && !did_set_to_missing_value)
        R = "application/x-www-form-urlencoded"_utf16;

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::encoding_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::encoding_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute is an enumerated attribute:
    // 1. Let contentAttributeValue be the result of running this's get the content attribute.
    auto content_attribute_value = idl_object->attribute("enctype"_utf16_fly_string);

    // 2. If contentAttributeValue is null, then set contentAttributeValue to the missing value default.
    auto R = content_attribute_value.value_or("application/x-www-form-urlencoded"_utf16);
    auto did_set_to_missing_value = false;
    if (!content_attribute_value.has_value())
        did_set_to_missing_value = true;

    // 3. If contentAttributeValue is an ASCII case-insensitive match for one of the keywords, then return that keyword's canonical keyword.
    Array valid_values { "application/x-www-form-urlencoded"_utf16, "multipart/form-data"_utf16, "text/plain"_utf16 };
    auto has_keyword = false;
    for (auto const& value : valid_values) {
        if (value.equals_ignoring_ascii_case(R)) {
            has_keyword = true;
            R = value;
            break;
        }
    }

    // 4. If contentAttributeValue is not a keyword and was not set to the missing value default, return the invalid value default.
    if (!has_keyword && !did_set_to_missing_value)
        R = "application/x-www-form-urlencoded"_utf16;

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::method_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::method_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute is an enumerated attribute:
    // 1. Let contentAttributeValue be the result of running this's get the content attribute.
    auto content_attribute_value = idl_object->attribute("method"_utf16_fly_string);

    // 2. If contentAttributeValue is null, then set contentAttributeValue to the missing value default.
    auto R = content_attribute_value.value_or("get"_utf16);
    auto did_set_to_missing_value = false;
    if (!content_attribute_value.has_value())
        did_set_to_missing_value = true;

    // 3. If contentAttributeValue is an ASCII case-insensitive match for one of the keywords, then return that keyword's canonical keyword.
    Array valid_values { "get"_utf16, "post"_utf16, "dialog"_utf16 };
    auto has_keyword = false;
    for (auto const& value : valid_values) {
        if (value.equals_ignoring_ascii_case(R)) {
            has_keyword = true;
            R = value;
            break;
        }
    }

    // 4. If contentAttributeValue is not a keyword and was not set to the missing value default, return the invalid value default.
    if (!has_keyword && !did_set_to_missing_value)
        R = "get"_utf16;

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::name_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::name_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute has the type DOMString:
    // 1. Let element be the result of running this's get the element.
    // 2. Let contentAttributeValue be the result of running this's get the content attribute.
    // 5. If contentAttributeValue is null, then return the empty string.
    // 6. Return contentAttributeValue.
    auto R = idl_object->get_attribute_value("name"_utf16_fly_string);

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::no_validate_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::no_validate_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute has the type boolean:
    // 1. Let contentAttributeValue be the result of running this's get the content attribute.
    // 2. If contentAttributeValue is null, then return false.
    auto R = idl_object->has_attribute("novalidate"_utf16_fly_string);

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::target_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::target_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute has the type DOMString:
    // 1. Let element be the result of running this's get the element.
    // 2. Let contentAttributeValue be the result of running this's get the content attribute.
    // 5. If contentAttributeValue is null, then return the empty string.
    // 6. Return contentAttributeValue.
    auto R = idl_object->get_attribute_value("target"_utf16_fly_string);

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::rel_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::rel_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    // If a reflected IDL attribute has the type DOMString:
    // 1. Let element be the result of running this's get the element.
    // 2. Let contentAttributeValue be the result of running this's get the content attribute.
    // 5. If contentAttributeValue is null, then return the empty string.
    // 6. Return contentAttributeValue.
    auto R = idl_object->get_attribute_value("rel"_utf16_fly_string);

    return WebIDL::primitive_string_from_string(vm, R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::rel_list_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::rel_list_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->rel_list(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::elements_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::elements_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->elements(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::length_getter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::length_getter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    auto* idl_object = TRY(impl_from(vm));


    auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->length(); }));

    return JS::Value(static_cast<WebIDL::UnsignedLong>(R));
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::accept_charset_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::accept_charset_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<String> {
        return TRY(WebIDL::to_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("accept-charset"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::action_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::action_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_usv_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->set_action(idl_value); }));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::autocomplete_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::autocomplete_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("autocomplete"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::enctype_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::enctype_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("enctype"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::encoding_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::encoding_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("enctype"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::method_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::method_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("method"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::name_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::name_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("name"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::no_validate_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::no_validate_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return V.to_boolean(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            if (!idl_value)
        idl_object->remove_attribute("novalidate"_utf16_fly_string);
    else
        idl_object->set_attribute_value("novalidate"_utf16_fly_string, Utf16String {});
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::target_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::target_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<String> {
        return TRY(WebIDL::to_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("target"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::rel_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::rel_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    auto original_steps = [&]() -> JS::ThrowCompletionOr<JS::Value> {
        // 6. Let idlValue be determined as follows:
        // -> Otherwise, idlValue is the result of converting V to an IDL value of attribute’s type.
        auto idl_value = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<String> {
        return TRY(WebIDL::to_string(vm, V));
    }(); }));

        // 7. Run the setter steps of attribute with idlObject as this and idlValue as the value.
        auto setter_result = [&]() -> JS::ThrowCompletionOr<void> {
            idl_object->set_attribute_value("rel"_utf16_fly_string, attribute_value_to_utf16(idl_value));
    return {};
        }();

        if (setter_result.is_error())
            return setter_result.release_error();

        return JS::js_undefined();
    };

    // 8. Return undefined.
    return TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::rel_list_setter)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::rel_list_setter");
    [[maybe_unused]] auto& realm = *vm.current_realm();

    // 1. Let V be undefined.
    auto V = JS::js_undefined();

    // 2. If any arguments were passed, then set V to the value of the first argument passed.
    if (vm.argument_count() > 0)
        V = vm.argument(0);

    // 3. Let id be attribute’s identifier.

    // 4. Let idlObject be null.
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = nullptr;

    // 5. If attribute is a regular attribute:

    // 1. Let jsValue be the this value, if it is not null or undefined, or realm’s global object otherwise. (This will subsequently cause a TypeError in a few steps, if the global object does not implement target and [LegacyLenientThis] is not specified.)
    auto js_value = vm.this_value();
    if (js_value.is_nullish())
        js_value = &realm.global_object();

    // 2. FIXME: If jsValue is a platform object, then perform a security check, passing jsValue, attribute’s identifier, and "setter".

    // 3. Let validThis be true if jsValue implements target, or false otherwise.
    auto maybe_idl_object = impl_from(vm, js_value);

    // 4. If validThis is false and attribute was not specified with the [LegacyLenientThis] extended attribute, then throw a TypeError.
    idl_object = TRY(maybe_idl_object);

    // 8. If attribute is declared with a [PutForwards] extended attribute, then:

    // 1. Let Q be ? Get(jsValue, id).
    auto receiver_value = TRY(idl_object->get("relList"_utf16_fly_string));

    // 2. If Q is not an Object, then throw a TypeError.
    if (!receiver_value.is_object())
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObject, receiver_value);
    auto& receiver = receiver_value.as_object();

    // 3. Let forwardId be the identifier argument of the [PutForwards] extended attribute.
    auto forward_id = "value"_utf16_fly_string;

    // 4. Perform ? Set(Q, forwardId, V, false).
    TRY(receiver.set(JS::PropertyKey { forward_id, JS::PropertyKey::StringMayBeNumber::No }, V, JS::Object::ShouldThrowExceptions::No));

    // 5. Return undefined.
    return JS::js_undefined();
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::submit)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::submit");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = TRY(impl_from(vm));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->submit(); }));
    return JS::js_undefined();
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::request_submit)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::request_submit");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = TRY(impl_from(vm));

    auto arg0 = vm.argument(0);
    GC::Ptr<HTML::HTMLElement> submitter = nullptr;
    if (!arg0.is_undefined())
        submitter = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<HTML::HTMLElement>> {
        GC::Ptr<HTML::HTMLElement> value;

        if (!arg0.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<GC::Ref<HTML::HTMLElement>> {
        if (auto impl = arg0.as_if<HTML::HTMLElement>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "HTMLElement");
    }());
        }
        return value;
    }(); }));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->request_submit(submitter); }));
    return JS::js_undefined();
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::reset)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::reset");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = TRY(impl_from(vm));

    auto original_steps = [&] {
        return throw_dom_exception_if_needed(vm, [&] { return idl_object->reset(); });
    };

    [[maybe_unused]] auto R = TRY([&]() -> decltype(original_steps()) {
        // For [CEReactions]: https://html.spec.whatwg.org/multipage/custom-elements.html#cereactions

        // 1. Push a new element queue onto this object's relevant agent's custom element reactions stack.
        auto& reactions_stack = HTML::relevant_similar_origin_window_agent(*idl_object).custom_element_reactions_stack;
        reactions_stack.element_queue_stack.append({});

        // 2. Run the originally-specified steps for this construct, catching any exceptions. If the steps return a value, let value be the returned value. If they throw an exception, let exception be the thrown exception.
        auto value_or_exception = original_steps();

        // 3. Let queue be the result of popping from this object's relevant agent's custom element reactions stack.
        // 4. Invoke custom element reactions in queue.
        auto queue = reactions_stack.element_queue_stack.take_last();
        Bindings::invoke_custom_element_reactions(queue);

        // 5. If an exception exception was thrown by the original steps, rethrow exception.
        if (value_or_exception.is_error())
            return value_or_exception.release_error();

        // 6. If a value value was returned from the original steps, return value.
        return value_or_exception.release_value();
    }());
    return JS::js_undefined();
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::check_validity)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::check_validity");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = TRY(impl_from(vm));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->check_validity(); }));
    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(HTMLFormElementPrototype::report_validity)
{
    WebIDL::log_trace(vm, "HTMLFormElementPrototype::report_validity");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] HTML::HTMLFormElement* idl_object = TRY(impl_from(vm));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->report_validity(); }));
    return JS::Value(R);
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<Autocomplete> convert_to_idl_value_for_autocomplete(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "on"sv)
        return Autocomplete::On;
    if (value_as_string == "off"sv)
        return Autocomplete::Off;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "Autocomplete");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(Autocomplete value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case Autocomplete::On:
        return "on"_utf16;
    case Autocomplete::Off:
        return "off"_utf16;
    }
    VERIFY_NOT_REACHED();
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<EnctypeAttribute> convert_to_idl_value_for_enctype_attribute(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "application/x-www-form-urlencoded"sv)
        return EnctypeAttribute::Application_XWwwFormUrlencoded;
    if (value_as_string == "multipart/form-data"sv)
        return EnctypeAttribute::Multipart_FormData;
    if (value_as_string == "text/plain"sv)
        return EnctypeAttribute::Text_Plain;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "EnctypeAttribute");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(EnctypeAttribute value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case EnctypeAttribute::Application_XWwwFormUrlencoded:
        return "application/x-www-form-urlencoded"_utf16;
    case EnctypeAttribute::Multipart_FormData:
        return "multipart/form-data"_utf16;
    case EnctypeAttribute::Text_Plain:
        return "text/plain"_utf16;
    }
    VERIFY_NOT_REACHED();
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<MethodAttribute> convert_to_idl_value_for_method_attribute(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "get"sv)
        return MethodAttribute::Get;
    if (value_as_string == "post"sv)
        return MethodAttribute::Post;
    if (value_as_string == "dialog"sv)
        return MethodAttribute::Dialog;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "MethodAttribute");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(MethodAttribute value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case MethodAttribute::Get:
        return "get"_utf16;
    case MethodAttribute::Post:
        return "post"_utf16;
    case MethodAttribute::Dialog:
        return "dialog"_utf16;
    }
    VERIFY_NOT_REACHED();
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<FormEnctypeAttribute> convert_to_idl_value_for_form_enctype_attribute(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "application/x-www-form-urlencoded"sv)
        return FormEnctypeAttribute::Application_XWwwFormUrlencoded;
    if (value_as_string == "multipart/form-data"sv)
        return FormEnctypeAttribute::Multipart_FormData;
    if (value_as_string == "text/plain"sv)
        return FormEnctypeAttribute::Text_Plain;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "FormEnctypeAttribute");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(FormEnctypeAttribute value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case FormEnctypeAttribute::Application_XWwwFormUrlencoded:
        return "application/x-www-form-urlencoded"_utf16;
    case FormEnctypeAttribute::Multipart_FormData:
        return "multipart/form-data"_utf16;
    case FormEnctypeAttribute::Text_Plain:
        return "text/plain"_utf16;
    }
    VERIFY_NOT_REACHED();
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<FormMethodAttribute> convert_to_idl_value_for_form_method_attribute(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "get"sv)
        return FormMethodAttribute::Get;
    if (value_as_string == "post"sv)
        return FormMethodAttribute::Post;
    if (value_as_string == "dialog"sv)
        return FormMethodAttribute::Dialog;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "FormMethodAttribute");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(FormMethodAttribute value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case FormMethodAttribute::Get:
        return "get"_utf16;
    case FormMethodAttribute::Post:
        return "post"_utf16;
    case FormMethodAttribute::Dialog:
        return "dialog"_utf16;
    }
    VERIFY_NOT_REACHED();
}

// https://webidl.spec.whatwg.org/#idl-enumeration
JS::ThrowCompletionOr<SelectionMode> convert_to_idl_value_for_selection_mode(JS::VM& vm, JS::Value value)
{
    // 1. Let S be the result of calling ? ToString(V).
    auto value_as_string = TRY(value.to_utf16_string(vm));

    // 2. If S is not one of E’s enumeration values, then throw a TypeError.
    // 3. Return the enumeration value of type E that is equal to S.
    if (value_as_string == "select"sv)
        return SelectionMode::Select;
    if (value_as_string == "start"sv)
        return SelectionMode::Start;
    if (value_as_string == "end"sv)
        return SelectionMode::End;
    if (value_as_string == "preserve"sv)
        return SelectionMode::Preserve;
    return vm.throw_completion<JS::TypeError>(JS::ErrorType::InvalidEnumerationValue, value_as_string, "SelectionMode");
}

// https://webidl.spec.whatwg.org/#idl-enumeration
Utf16String idl_enum_to_string(SelectionMode value)
{
    // The result of converting an IDL enumeration type value to a JavaScript value is the String value that represents the same sequence of code units as the enumeration value.
    switch (value) {
    case SelectionMode::Select:
        return "select"_utf16;
    case SelectionMode::Start:
        return "start"_utf16;
    case SelectionMode::End:
        return "end"_utf16;
    case SelectionMode::Preserve:
        return "preserve"_utf16;
    }
    VERIFY_NOT_REACHED();
}

} // namespace Web::Bindings