#include <AK/Utf16String.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/PropertyDescriptor.h>
#include <LibJS/Runtime/VM.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibWeb/Bindings/EventTarget.h>
#include <LibWeb/Bindings/ExceptionOrUtils.h>
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Bindings/MainThreadVM.h>
#include <LibWeb/Bindings/Node.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/DOM/NodeList.h>
#include <LibWeb/HTML/Scripting/SimilarOriginWindowAgent.h>
#include <LibWeb/WebIDL/AbstractOperations.h>
#include <LibWeb/WebIDL/Tracing.h>
#include <LibWeb/WebIDL/Types.h>

namespace Web::Bindings {

void NodeConstructor::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<EventTargetPrototype>(realm, "EventTarget"_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, "Node"_utf16), JS::Attribute::Configurable);
    object.define_direct_property(vm.names.prototype, &ensure_web_prototype<NodePrototype>(realm, "Node"_fly_string), 0);

    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ELEMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(1)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ATTRIBUTE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(2)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("TEXT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(3)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("CDATA_SECTION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(4)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ENTITY_REFERENCE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(5)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ENTITY_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(6)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("PROCESSING_INSTRUCTION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(7)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("COMMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(8)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(9)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_TYPE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(10)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_FRAGMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(11)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("NOTATION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(12)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_DISCONNECTED"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x01)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_PRECEDING"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x02)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_FOLLOWING"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x04)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_CONTAINS"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x08)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_CONTAINED_BY"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x10)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x20)), JS::Attribute::Enumerable);
}

JS::ThrowCompletionOr<GC::Ref<JS::Object>> NodeConstructor::construct([[maybe_unused]] InterfaceConstructor& constructor, [[maybe_unused]] JS::FunctionObject& new_target)
{
    WebIDL::log_trace(constructor.vm(), "NodeConstructor::construct");
    return constructor.vm().throw_completion<JS::TypeError>(JS::ErrorType::NotAConstructor, "Node");
}

void NodePrototype::initialize(JS::Realm& realm, JS::Object& object)
{
    [[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<EventTargetPrototype>(realm, "EventTarget"_fly_string) });

    auto node_type_id = "nodeType"_utf16_fly_string;
    auto native_node_type_getter = JS::NativeFunction::create(realm, node_type_getter, 0, node_type_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_node_type_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto node_type_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(node_type_id, native_node_type_getter, native_node_type_setter, node_type_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 node_name_id = "nodeName"_utf16_fly_string;
    auto native_node_name_getter = JS::NativeFunction::create(realm, node_name_getter, 0, node_name_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_node_name_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto node_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(node_name_id, native_node_name_getter, native_node_name_setter, node_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 base_uri_id = "baseURI"_utf16_fly_string;
    auto native_base_uri_getter = JS::NativeFunction::create(realm, base_uri_getter, 0, base_uri_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_base_uri_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto base_uri_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(base_uri_id, native_base_uri_getter, native_base_uri_setter, base_uri_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 is_connected_id = "isConnected"_utf16_fly_string;
    auto native_is_connected_getter = JS::NativeFunction::create(realm, is_connected_getter, 0, is_connected_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_is_connected_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto is_connected_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(is_connected_id, native_is_connected_getter, native_is_connected_setter, is_connected_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 owner_document_id = "ownerDocument"_utf16_fly_string;
    auto native_owner_document_getter = JS::NativeFunction::create(realm, owner_document_getter, 0, owner_document_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_owner_document_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto owner_document_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(owner_document_id, native_owner_document_getter, native_owner_document_setter, owner_document_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 parent_node_id = "parentNode"_utf16_fly_string;
    auto native_parent_node_getter = JS::NativeFunction::create(realm, parent_node_getter, 0, parent_node_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_parent_node_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto parent_node_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(parent_node_id, native_parent_node_getter, native_parent_node_setter, parent_node_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 parent_element_id = "parentElement"_utf16_fly_string;
    auto native_parent_element_getter = JS::NativeFunction::create(realm, parent_element_getter, 0, parent_element_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_parent_element_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto parent_element_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(parent_element_id, native_parent_element_getter, native_parent_element_setter, parent_element_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 child_nodes_id = "childNodes"_utf16_fly_string;
    auto native_child_nodes_getter = JS::NativeFunction::create(realm, child_nodes_getter, 0, child_nodes_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_child_nodes_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto child_nodes_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(child_nodes_id, native_child_nodes_getter, native_child_nodes_setter, child_nodes_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 first_child_id = "firstChild"_utf16_fly_string;
    auto native_first_child_getter = JS::NativeFunction::create(realm, first_child_getter, 0, first_child_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_first_child_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto first_child_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(first_child_id, native_first_child_getter, native_first_child_setter, first_child_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 last_child_id = "lastChild"_utf16_fly_string;
    auto native_last_child_getter = JS::NativeFunction::create(realm, last_child_getter, 0, last_child_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_last_child_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto last_child_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(last_child_id, native_last_child_getter, native_last_child_setter, last_child_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 previous_sibling_id = "previousSibling"_utf16_fly_string;
    auto native_previous_sibling_getter = JS::NativeFunction::create(realm, previous_sibling_getter, 0, previous_sibling_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_previous_sibling_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto previous_sibling_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(previous_sibling_id, native_previous_sibling_getter, native_previous_sibling_setter, previous_sibling_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 next_sibling_id = "nextSibling"_utf16_fly_string;
    auto native_next_sibling_getter = JS::NativeFunction::create(realm, next_sibling_getter, 0, next_sibling_id, &realm, "get"sv);
    GC::Ptr<JS::NativeFunction> native_next_sibling_setter;

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto next_sibling_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(next_sibling_id, native_next_sibling_getter, native_next_sibling_setter, next_sibling_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 node_value_id = "nodeValue"_utf16_fly_string;
    auto native_node_value_getter = JS::NativeFunction::create(realm, node_value_getter, 0, node_value_id, &realm, "get"sv);
    auto native_node_value_setter = JS::NativeFunction::create(realm, node_value_setter, 1, node_value_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto node_value_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(node_value_id, native_node_value_getter, native_node_value_setter, node_value_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 text_content_id = "textContent"_utf16_fly_string;
    auto native_text_content_getter = JS::NativeFunction::create(realm, text_content_getter, 0, text_content_id, &realm, "get"sv);
    auto native_text_content_setter = JS::NativeFunction::create(realm, text_content_setter, 1, text_content_id, &realm, "set"sv);

    // 4. Let configurable be false if attr is unforgeable and true otherwise.
    auto text_content_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(text_content_id, native_text_content_getter, native_text_content_setter, text_content_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, "getRootNode"_utf16_fly_string, get_root_node, 0, default_attributes);

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

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

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

    object.define_native_function(realm, "isEqualNode"_utf16_fly_string, is_equal_node, 1, default_attributes);

    object.define_native_function(realm, "isSameNode"_utf16_fly_string, is_same_node, 1, default_attributes);

    object.define_native_function(realm, "compareDocumentPosition"_utf16_fly_string, compare_document_position, 1, default_attributes);

    object.define_native_function(realm, "contains"_utf16_fly_string, contains, 1, default_attributes);

    object.define_native_function(realm, "lookupPrefix"_utf16_fly_string, lookup_prefix, 1, default_attributes);

    object.define_native_function(realm, "lookupNamespaceURI"_utf16_fly_string, lookup_namespace_uri, 1, default_attributes);

    object.define_native_function(realm, "isDefaultNamespace"_utf16_fly_string, is_default_namespace, 1, default_attributes);

    object.define_native_function(realm, "insertBefore"_utf16_fly_string, insert_before, 2, default_attributes);

    object.define_native_function(realm, "appendChild"_utf16_fly_string, append_child, 1, default_attributes);

    object.define_native_function(realm, "replaceChild"_utf16_fly_string, replace_child, 2, default_attributes);

    object.define_native_function(realm, "removeChild"_utf16_fly_string, remove_child, 1, default_attributes);


    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ELEMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(1)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ATTRIBUTE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(2)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("TEXT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(3)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("CDATA_SECTION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(4)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ENTITY_REFERENCE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(5)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("ENTITY_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(6)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("PROCESSING_INSTRUCTION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(7)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("COMMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(8)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(9)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_TYPE_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(10)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_FRAGMENT_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(11)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("NOTATION_NODE"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(12)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_DISCONNECTED"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x01)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_PRECEDING"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x02)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_FOLLOWING"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x04)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_CONTAINS"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x08)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_CONTAINED_BY"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x10)), JS::Attribute::Enumerable);
    // 1. FIXME: If const is not exposed in realm, then continue.
    // 2. Let value be the result of converting const’s IDL value to a JavaScript value.
    // 3. Let desc be the PropertyDescriptor{[[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false, [[Value]]: value}.
    // 4. Let id be const’s identifier.
    // 5. Perform ! DefinePropertyOrThrow(target, id, desc).
    object.define_direct_property("DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC"_utf16_fly_string, JS::Value(static_cast<WebIDL::UnsignedShort>(0x20)), JS::Attribute::Enumerable);
    object.define_direct_property(vm.well_known_symbol_to_string_tag(), JS::PrimitiveString::create(vm, "Node"_utf16), JS::Attribute::Configurable);
}

void NodePrototype::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<DOM::Node*> impl_from(JS::VM& vm, JS::Value js_value)
{

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

[[maybe_unused]] static JS::ThrowCompletionOr<DOM::Node*> 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(NodePrototype::node_type_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::node_type_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->node_type(); }));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::node_name_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::node_name_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->node_name(); }));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::base_uri_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::base_uri_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->base_uri(); }));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::is_connected_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::is_connected_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->is_connected(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::owner_document_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::owner_document_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->owner_document(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::parent_node_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::parent_node_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->parent_node(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::parent_element_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::parent_element_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->parent_element(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::child_nodes_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::child_nodes_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->child_nodes(); }));

    return JS::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::first_child_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::first_child_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->first_child(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::last_child_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::last_child_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->last_child(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::previous_sibling_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::previous_sibling_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->previous_sibling(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::next_sibling_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::next_sibling_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->next_sibling(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R)
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(JS::Value(R));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::node_value_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::node_value_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->node_value(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::text_content_getter)
{
    WebIDL::log_trace(vm, "NodePrototype::text_content_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->text_content(); }));

    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::node_value_setter)
{
    WebIDL::log_trace(vm, "NodePrototype::node_value_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]] DOM::Node* 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<Optional<Utf16String>> {
        Optional<Utf16String> value;

        if (!V.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }());
        }
        return value;
    }(); }));

        // 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_node_value(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(NodePrototype::text_content_setter)
{
    WebIDL::log_trace(vm, "NodePrototype::text_content_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]] DOM::Node* 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<Optional<Utf16String>> {
        Optional<Utf16String> value;

        if (!V.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, V));
    }());
        }
        return value;
    }(); }));

        // 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_text_content(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(NodePrototype::get_root_node)
{
    WebIDL::log_trace(vm, "NodePrototype::get_root_node");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    auto arg0 = vm.argument(0);
    GetRootNodeOptions options = GetRootNodeOptions {};
    if (!arg0.is_undefined())
        options = TRY(throw_dom_exception_if_needed(vm, [&] { return convert_to_idl_value_for_get_root_node_options(vm, arg0); }));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::has_child_nodes)
{
    WebIDL::log_trace(vm, "NodePrototype::has_child_nodes");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::normalize)
{
    WebIDL::log_trace(vm, "NodePrototype::normalize");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

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

    [[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(NodePrototype::clone_node)
{
    WebIDL::log_trace(vm, "NodePrototype::clone_node");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    auto arg0 = vm.argument(0);
    bool deep = false;
    if (!arg0.is_undefined())
        deep = TRY(throw_dom_exception_if_needed(vm, [&] { return arg0.to_boolean(); }));

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

    [[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::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::is_equal_node)
{
    WebIDL::log_trace(vm, "NodePrototype::is_equal_node");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "isEqualNode");

    auto arg0 = vm.argument(0);
    auto other_node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<DOM::Node>> {
        GC::Ptr<DOM::Node> value;

        if (!arg0.is_nullish()) {

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

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::is_same_node)
{
    WebIDL::log_trace(vm, "NodePrototype::is_same_node");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "isSameNode");

    auto arg0 = vm.argument(0);
    auto other_node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<DOM::Node>> {
        GC::Ptr<DOM::Node> value;

        if (!arg0.is_nullish()) {

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

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::compare_document_position)
{
    WebIDL::log_trace(vm, "NodePrototype::compare_document_position");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "compareDocumentPosition");

    auto arg0 = vm.argument(0);
    auto other_node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<DOM::Node>> {
        GC::Ptr<DOM::Node> value;

        if (!arg0.is_nullish()) {

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

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->compare_document_position(other_node); }));
    return JS::Value(static_cast<WebIDL::UnsignedShort>(R));
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::contains)
{
    WebIDL::log_trace(vm, "NodePrototype::contains");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "contains");

    auto arg0 = vm.argument(0);
    auto other = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<DOM::Node>> {
        GC::Ptr<DOM::Node> value;

        if (!arg0.is_nullish()) {

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

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::lookup_prefix)
{
    WebIDL::log_trace(vm, "NodePrototype::lookup_prefix");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "lookupPrefix");

    auto arg0 = vm.argument(0);
    auto namespace_ = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Optional<Utf16String>> {
        Optional<Utf16String> value;

        if (!arg0.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, arg0));
    }());
        }
        return value;
    }(); }));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->lookup_prefix(namespace_); }));
    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::lookup_namespace_uri)
{
    WebIDL::log_trace(vm, "NodePrototype::lookup_namespace_uri");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "lookupNamespaceURI");

    auto arg0 = vm.argument(0);
    auto prefix = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Optional<Utf16String>> {
        Optional<Utf16String> value;

        if (!arg0.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, arg0));
    }());
        }
        return value;
    }(); }));

    [[maybe_unused]] auto R = TRY(throw_dom_exception_if_needed(vm, [&] { return idl_object->lookup_namespace_uri(prefix); }));
    return [&]() -> JS::Value {
        // 1. If the IDL nullable type T? value is null, then the JavaScript value is null.
        if (!R.has_value())
            return JS::js_null();

        // 2. Otherwise, the JavaScript value is the result of converting the IDL nullable type value to the inner IDL type T.
        return JS::Value(WebIDL::primitive_string_from_string(vm, R.value()));
    }();
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::is_default_namespace)
{
    WebIDL::log_trace(vm, "NodePrototype::is_default_namespace");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "isDefaultNamespace");

    auto arg0 = vm.argument(0);
    auto namespace_ = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<Optional<Utf16String>> {
        Optional<Utf16String> value;

        if (!arg0.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<Utf16String> {
        return TRY(WebIDL::to_utf16_string(vm, arg0));
    }());
        }
        return value;
    }(); }));

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

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::insert_before)
{
    WebIDL::log_trace(vm, "NodePrototype::insert_before");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 2)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountMany, "insertBefore", "2");

    auto arg0 = vm.argument(0);
    auto node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg0.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

    auto arg1 = vm.argument(1);
    auto child = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ptr<DOM::Node>> {
        GC::Ptr<DOM::Node> value;

        if (!arg1.is_nullish()) {

            value = TRY([&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg1.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }());
        }
        return value;
    }(); }));

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

    [[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::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::append_child)
{
    WebIDL::log_trace(vm, "NodePrototype::append_child");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "appendChild");

    auto arg0 = vm.argument(0);
    auto node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg0.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

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

    [[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::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::replace_child)
{
    WebIDL::log_trace(vm, "NodePrototype::replace_child");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 2)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountMany, "replaceChild", "2");

    auto arg0 = vm.argument(0);
    auto node = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg0.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

    auto arg1 = vm.argument(1);
    auto child = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg1.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

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

    [[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::Value(R);
}

JS_DEFINE_NATIVE_FUNCTION(NodePrototype::remove_child)
{
    WebIDL::log_trace(vm, "NodePrototype::remove_child");
    [[maybe_unused]] auto& realm = *vm.current_realm();
    [[maybe_unused]] DOM::Node* idl_object = TRY(impl_from(vm));

    if (vm.argument_count() < 1)
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::BadArgCountOne, "removeChild");

    auto arg0 = vm.argument(0);
    auto child = TRY(throw_dom_exception_if_needed(vm, [&] { return [&]() -> JS::ThrowCompletionOr<GC::Ref<DOM::Node>> {
        if (auto impl = arg0.as_if<DOM::Node>())
            return *impl;
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Node");
    }(); }));

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

    [[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::Value(R);
}

// https://webidl.spec.whatwg.org/#es-dictionary
JS::ThrowCompletionOr<GetRootNodeOptions> convert_to_idl_value_for_get_root_node_options(JS::VM& vm, JS::Value js_dict)
{
    // 1. If jsDict is not an Object and jsDict is neither undefined nor null, then throw a TypeError.
    if (!js_dict.is_object() && !js_dict.is_nullish())
        return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "GetRootNodeOptions");

    // 2. Let idlDict be an empty ordered map, representing a dictionary of type D.
    // 3. Let dictionaries be a list consisting of D and all of D’s inherited dictionaries, in order from least to most derived.
    // 4. For each dictionary dictionary in dictionaries, in order:
    // NB: We defer construction until the return initializer because some members may not be default-constructible. Inherited dictionaries are represented by the generated C++ struct inheritance.

    // 5. Return idlDict.
    return GetRootNodeOptions {
        .composed = TRY([&]() -> JS::ThrowCompletionOr<bool> {
            // 1. Let key be the identifier of member.
            // 2. If jsDict is either undefined or null, then:
            //     1. Let jsMemberValue be undefined.
            // 3. Otherwise,
            //     1. Let jsMemberValue be ? Get(jsDict, key).
            auto js_member_value = JS::js_undefined();
            if (js_dict.is_object())
                js_member_value = TRY(js_dict.as_object().get("composed"_utf16_fly_string));

            // 4. If jsMemberValue is not undefined, then:
            if (!js_member_value.is_undefined()) {
                // 1. Let idlMemberValue be the result of converting jsMemberValue to an IDL value whose type is the type member is declared to be of.
                auto idl_member_value = TRY(throw_dom_exception_if_needed(vm, [&] { return js_member_value.to_boolean(); }));

                // 2. Set idlDict[key] to idlMemberValue.
                return idl_member_value;
            }
            // 5. Otherwise, if jsMemberValue is undefined but member has a default value, then:
            // 1. Let idlMemberValue be the result of converting member's default value to an IDL value whose type is the type member is declared to be of.
            auto idl_member_value = false;

            // 2. Set idlDict[key] to idlMemberValue.
            return idl_member_value;
        }()),
    };
}

} // namespace Web::Bindings