types(reactivity): simplify UnwrapNestedRefs (#4194)

Author: Picknight

packages/reactivity/src/reactive.ts

@@ -11,7 +11,7 @@ import {
   shallowCollectionHandlers,
   shallowReadonlyCollectionHandlers
 } from './collectionHandlers'
-import { UnwrapRef, Ref } from './ref'
+import { UnwrapRefSimple, Ref } from './ref'
 
 export const enum ReactiveFlags {
   SKIP = '__v_skip',
@@ -60,7 +60,7 @@ function getTargetType(value: Target) {
 }
 
 // only unwrap nested ref
-export type UnwrapNestedRefs<T> = T extends Ref ? T : UnwrapRef<T>
+export type UnwrapNestedRefs<T> = T extends Ref ? T : UnwrapRefSimple<T>
 
 /**
  * Creates a reactive copy of the original object.

packages/reactivity/src/ref.ts

@@ -264,7 +264,7 @@ export type UnwrapRef<T> = T extends Ref<infer V>
   ? UnwrapRefSimple<V>
   : UnwrapRefSimple<T>
 
-type UnwrapRefSimple<T> = T extends
+export type UnwrapRefSimple<T> = T extends
   | Function
   | CollectionTypes
   | BaseTypes