From 880d6db83fb172f8aae8342b04894698a03f5606 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=B6=E8=BF=9C=E6=96=B9?= <yangpanteng@gmail.com>
Date: Wed, 5 Jul 2023 09:40:33 +0800
Subject: [PATCH] chore: improve the types for $set and $delete

---
 src/core/observer/index.ts | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/core/observer/index.ts b/src/core/observer/index.ts
index 9988fb8687f..02d19150b8b 100644
--- a/src/core/observer/index.ts
+++ b/src/core/observer/index.ts
@@ -218,7 +218,11 @@ export function defineReactive(
  * already exist.
  */
 export function set<T>(array: T[], key: number, value: T): T
-export function set<T>(object: object, key: string | number, value: T): T
+export function set<T extends Record<keyof any, any>, K extends keyof T>(
+  object: T,
+  key: K,
+  value: T[K]
+): T
 export function set(
   target: any[] | Record<string, any>,
   key: any,
@@ -278,7 +282,10 @@ export function set(
  * Delete a property and trigger change if necessary.
  */
 export function del<T>(array: T[], key: number): void
-export function del(object: object, key: string | number): void
+export function del<T extends Record<keyof any, any>, K extends keyof T>(
+  object: T,
+  key: K
+): void
 export function del(target: any[] | object, key: any) {
   if (__DEV__ && (isUndef(target) || isPrimitive(target))) {
     warn(