[EventEmitter] Fix emitter.off("eventName")

1 files changed, 6 insertions, 1 deletions

diff --git a/src/bun.js/bindings/webcore/JSEventEmitter.cpp b/src/bun.js/bindings/webcore/JSEventEmitter.cpp
index 542de1339..28a18c31c 100644
--- a/src/bun.js/bindings/webcore/JSEventEmitter.cpp
+++ b/src/bun.js/bindings/webcore/JSEventEmitter.cpp
@@ -332,11 +332,16 @@ static inline JSC::EncodedJSValue jsEventEmitterPrototypeFunction_removeListener
     UNUSED_PARAM(throwScope);
     UNUSED_PARAM(callFrame);
     auto& impl = castedThis->wrapped();
-    if (UNLIKELY(callFrame->argumentCount() < 2))
+    if (UNLIKELY(callFrame->argumentCount() < 1))
         return throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
     EnsureStillAliveScope argument0 = callFrame->uncheckedArgument(0);
     auto eventType = argument0.value().toPropertyKey(lexicalGlobalObject);
     RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
+    if (callFrame->argumentCount() < 2) {
+        impl.removeAllListeners(eventType);
+        RELEASE_AND_RETURN(throwScope, JSValue::encode(actualThis));
+    }
+
     EnsureStillAliveScope argument1 = callFrame->uncheckedArgument(1);
     auto listener = convert<IDLNullable<IDLEventListener<JSEventListener>>>(*lexicalGlobalObject, argument1.value(), *castedThis, [](JSC::JSGlobalObject& lexicalGlobalObject, JSC::ThrowScope& scope) { throwArgumentMustBeObjectError(lexicalGlobalObject, scope, 1, "listener", "EventEmitter", "removeListener"); });
     RETURN_IF_EXCEPTION(throwScope, encodedJSValue());