LibWeb: Implement WindowEventHandlers

Author: https://github.com/Lubrsi
Commit: 3fe66bddf4
Pull-request: https://github.com/SerenityOS/serenity/pull/14406
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibWeb/Bindings/WindowObject.cpp

@@ -137,10 +137,11 @@ void WindowObject::initialize_global_object()
     // WebAssembly "namespace"
     define_direct_property("WebAssembly", heap().allocate<WebAssemblyObject>(*this, *this), JS::Attribute::Enumerable | JS::Attribute::Configurable);
 
-    // HTML::GlobalEventHandlers
+    // HTML::GlobalEventHandlers and HTML::WindowEventHandlers
 #define __ENUMERATE(attribute, event_name) \
     define_native_accessor(#attribute, attribute##_getter, attribute##_setter, attr);
     ENUMERATE_GLOBAL_EVENT_HANDLERS(__ENUMERATE);
+    ENUMERATE_WINDOW_EVENT_HANDLERS(__ENUMERATE);
 #undef __ENUMERATE
 
     ADD_WINDOW_OBJECT_INTERFACES;
@@ -719,6 +720,7 @@ JS_DEFINE_NATIVE_FUNCTION(WindowObject::name_setter)
         return JS::js_undefined();                                                                                         \
     }
 ENUMERATE_GLOBAL_EVENT_HANDLERS(__ENUMERATE)
+ENUMERATE_WINDOW_EVENT_HANDLERS(__ENUMERATE)
 #undef __ENUMERATE
 
 }