wip: fix render fn compat detection

packages/runtime-core/src/components/BaseTransition.ts

@@ -1,7 +1,8 @@
 import {
   getCurrentInstance,
   SetupContext,
-  ComponentInternalInstance
+  ComponentInternalInstance,
+  ComponentOptions
 } from '../component'
 import {
   cloneVNode,
@@ -110,7 +111,7 @@ export function useTransitionState(): TransitionState {
 
 const TransitionHookValidator = [Function, Array]
 
-const BaseTransitionImpl = {
+const BaseTransitionImpl: ComponentOptions = {
   name: `BaseTransition`,
 
   props: {
@@ -250,6 +251,10 @@ const BaseTransitionImpl = {
   }
 }
 
+if (__COMPAT__) {
+  BaseTransitionImpl.__isBuiltIn = true
+}
+
 // export the public type for h/tsx inference
 // also to avoid inline import() in generated d.ts files
 export const BaseTransition = (BaseTransitionImpl as any) as {

packages/runtime-core/src/components/KeepAlive.ts

@@ -5,7 +5,8 @@ import {
   ComponentInternalInstance,
   LifecycleHooks,
   currentInstance,
-  getComponentName
+  getComponentName,
+  ComponentOptions
 } from '../component'
 import { VNode, cloneVNode, isVNode, VNodeProps } from '../vnode'
 import { warn } from '../warning'
@@ -62,7 +63,7 @@ export interface KeepAliveContext extends ComponentRenderContext {
 export const isKeepAlive = (vnode: VNode): boolean =>
   (vnode.type as any).__isKeepAlive
 
-const KeepAliveImpl = {
+const KeepAliveImpl: ComponentOptions = {
   name: `KeepAlive`,
 
   // Marker for special handling inside the renderer. We are not using a ===
@@ -298,6 +299,10 @@ const KeepAliveImpl = {
   }
 }
 
+if (__COMPAT__) {
+  KeepAliveImpl.__isBuildIn = true
+}
+
 // export the public type for h/tsx inference
 // also to avoid inline import() in generated d.ts files
 export const KeepAlive = (KeepAliveImpl as any) as {