fix(toRef): ref created from union typed prop can't be used in watch (#3048)

2021-02-04 02:12:51 +08:00
parent 6d5b623512
commit 4ca4666d58
2 changed files with 11 additions and 2 deletions
--- a/packages/reactivity/src/ref.ts
+++ b/packages/reactivity/src/ref.ts
@@ -20,7 +20,7 @@ export interface Ref<T = any> {
  _shallow?: boolean
 }

-export type ToRef<T> = T extends Ref ? T : Ref<UnwrapRef<T>>
+export type ToRef<T> = [T] extends [Ref] ? T : Ref<UnwrapRef<T>>
 export type ToRefs<T = any> = {
  // #2687: somehow using ToRef<T[K]> here turns the resulting type into
  // a union of multiple Ref<*> types instead of a single Ref<* | *> type.