From 4178d5d7d9549a0a1d19663bc2f92c8ac6a731b2 Mon Sep 17 00:00:00 2001
From: fishDog <40156382+Bigfish8@users.noreply.github.com>
Date: Tue, 7 Sep 2021 03:24:15 +0800
Subject: [PATCH] fix(type): fix prop type infer (#4530)

fix #4525
---
 packages/runtime-core/src/componentProps.ts | 8 ++++----
 test-dts/defineComponent.test-d.tsx         | 5 ++++-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/packages/runtime-core/src/componentProps.ts b/packages/runtime-core/src/componentProps.ts
index cca7fbcdc72..924f40a7384 100644
--- a/packages/runtime-core/src/componentProps.ts
+++ b/packages/runtime-core/src/componentProps.ts
@@ -109,10 +109,10 @@ type InferPropType<T> = [T] extends [null]
   ? boolean
   : [T] extends [DateConstructor | { type: DateConstructor }]
   ? Date
-  : [T] extends [
-      (DateConstructor | infer U)[] | { type: (DateConstructor | infer U)[] }
-    ]
-  ? Date | InferPropType<U>
+  : [T] extends [(infer U)[] | { type: (infer U)[] }]
+  ? U extends DateConstructor
+    ? Date | InferPropType<U>
+    : InferPropType<U>
   : [T] extends [Prop<infer V, infer D>]
   ? unknown extends V
     ? D
diff --git a/test-dts/defineComponent.test-d.tsx b/test-dts/defineComponent.test-d.tsx
index fb50648b579..8604f8e9fbd 100644
--- a/test-dts/defineComponent.test-d.tsx
+++ b/test-dts/defineComponent.test-d.tsx
@@ -44,6 +44,7 @@ describe('with object props', () => {
     date?: Date
     l?: Date
     ll?: Date | number
+    lll?: string | number
   }
 
   type GT = string & { __brand: unknown }
@@ -135,7 +136,8 @@ describe('with object props', () => {
       },
       date: Date,
       l: [Date],
-      ll: [Date, Number]
+      ll: [Date, Number],
+      lll: [String, Number]
     },
     setup(props) {
       // type assertion. See https://github.com/SamVerschueren/tsd
@@ -170,6 +172,7 @@ describe('with object props', () => {
       expectType<ExpectedProps['date']>(props.date)
       expectType<ExpectedProps['l']>(props.l)
       expectType<ExpectedProps['ll']>(props.ll)
+      expectType<ExpectedProps['lll']>(props.lll)
 
       // @ts-expect-error props should be readonly
       expectError((props.a = 1))