chore(types): export UnwrapNestedRefs type (#779)

Co-authored-by: webfansplz <>

Author: webfansplz

src/reactivity/index.ts

@@ -29,4 +29,4 @@ export type {
   UnwrapRefSimple,
   ShallowUnwrapRef,
 } from './ref'
-export type { DeepReadonly } from './readonly'
+export type { DeepReadonly, UnwrapNestedRefs } from './readonly'

src/reactivity/readonly.ts

@@ -33,7 +33,7 @@ export type DeepReadonly<T> = T extends Builtin
                   : Readonly<T>
 
 // only unwrap nested ref
-type UnwrapNestedRefs<T> = T extends Ref ? T : UnwrapRefSimple<T>
+export type UnwrapNestedRefs<T> = T extends Ref ? T : UnwrapRefSimple<T>
 
 /**
  * **In @vue/composition-api, `reactive` only provides type-level readonly check**