do it properly with webidl manifest

crates/web-sys/src/features/gen_EventTarget.rs

@@ -155,15 +155,18 @@ extern "C" {
     #[doc = "[MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/dispatchEvent)"]
     #[doc = ""]
     #[doc = "*This API requires the following crate features to be activated: `Event`, `EventTarget`*"]
-    pub fn dispatch_event(this: &EventTarget, event: &Event) -> Result<bool, JsValue>;
+    pub fn dispatch_event_with_event(this: &EventTarget, event: &Event) -> Result<bool, JsValue>;
     #[cfg(feature = "CustomEvent")]
     # [wasm_bindgen (catch , method , structural , js_class = "EventTarget" , js_name = dispatchEvent)]
     #[doc = "The `dispatchEvent()` method."]
     #[doc = ""]
     #[doc = "[MDN Documentation](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/dispatchEvent)"]
     #[doc = ""]
     #[doc = "*This API requires the following crate features to be activated: `CustomEvent`, `EventTarget`*"]
-    pub fn dispatch_custom_event(this: &EventTarget, event: &CustomEvent) -> Result<bool, JsValue>;
+    pub fn dispatch_event_with_custom_event(
+        this: &EventTarget,
+        event: &CustomEvent,
+    ) -> Result<bool, JsValue>;
     # [wasm_bindgen (catch , method , structural , js_class = "EventTarget" , js_name = removeEventListener)]
     #[doc = "The `removeEventListener()` method."]
     #[doc = ""]

crates/web-sys/webidls/enabled/EventTarget.webidl

@@ -37,5 +37,5 @@ interface EventTarget {
                            EventListener listener,
                            optional (EventListenerOptions or boolean) options);
   [Throws, NeedsCallerType]
-  boolean dispatchEvent(Event event);
+  boolean dispatchEvent((Event or CustomEvent) event);
 };