From a75b00c55834a088f7b44bc5df99673fa0ff076c Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Wed, 21 Apr 2021 19:13:26 -0400
Subject: [PATCH] wip: treat compat model listener as already declared

---
 packages/runtime-core/src/componentEmits.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/runtime-core/src/componentEmits.ts b/packages/runtime-core/src/componentEmits.ts
index ca04092a0..d5e2cb9f8 100644
--- a/packages/runtime-core/src/componentEmits.ts
+++ b/packages/runtime-core/src/componentEmits.ts
@@ -219,6 +219,11 @@ export function isEmitListener(
   if (!options || !isOn(key)) {
     return false
   }
+
+  if (__COMPAT__ && key.startsWith(compatModelEventPrefix)) {
+    return true
+  }
+
   key = key.slice(2).replace(/Once$/, '')
   return (
     hasOwn(options, key[0].toLowerCase() + key.slice(1)) ||