LibWeb: Make the Window object "inherit" from EventTarget :^)

Since Web::Bindings::WindowObject inherits from JS::GlobalObject, it
cannot also inherit from Web::Bindings::EventTargetWrapper.

However, that's not actually necessary. Instead, we simply set the
Window object's prototype to the EventTargetPrototype, and add a little
extra branch in the impl_from() function that turns the JS "this" value
into a DOM::EventTarget*.

With this, you can now call window.addEventListener()! Very cool :^)

Fixes #4758.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/Libraries/LibWeb/DOM/EventTarget.h b/Userland/Libraries/LibWeb/DOM/EventTarget.h
index 32399a6a7a..f03d4a4fb2 100644
--- a/Userland/Libraries/LibWeb/DOM/EventTarget.h
+++ b/Userland/Libraries/LibWeb/DOM/EventTarget.h
@@ -51,7 +51,7 @@ public:
     void remove_from_event_listener_list(NonnullRefPtr<EventListener>);
 
     virtual bool dispatch_event(NonnullRefPtr<Event>) = 0;
-    virtual Bindings::EventTargetWrapper* create_wrapper(JS::GlobalObject&) = 0;
+    virtual JS::Object* create_wrapper(JS::GlobalObject&) = 0;
     Bindings::ScriptExecutionContext* script_execution_context() { return m_script_execution_context; }
 
     virtual EventTarget* get_parent(const Event&) { return nullptr; }