From 80b08f8bf7857999758dd4f91aefb2a65d12fec5 Mon Sep 17 00:00:00 2001
From: LastLeaf <bqfu@163.com>
Date: Wed, 25 Feb 2026 19:52:39 +0800
Subject: [PATCH] fix: property type infer on type null (#369)

---
 test/component.test.ts         | 1 +
 types/wx/lib.wx.component.d.ts | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/test/component.test.ts b/test/component.test.ts
index 60371ba..130dda1 100644
--- a/test/component.test.ts
+++ b/test/component.test.ts
@@ -34,6 +34,7 @@ Component({
         expectType<number>(oldVal)
         expectType<void>(this.onMyButtonTap())
         expectType<number>(this.data.max)
+        expectType<string>(this.data.freeType)
       },
     },
     lastLeaf: {
diff --git a/types/wx/lib.wx.component.d.ts b/types/wx/lib.wx.component.d.ts
index cdf4b08..0bf2b59 100644
--- a/types/wx/lib.wx.component.d.ts
+++ b/types/wx/lib.wx.component.d.ts
@@ -172,7 +172,9 @@ declare namespace WechatMiniprogram.Component {
         : T extends ObjectConstructor
         ? IAnyObject
         : never
-    type SimpleValueType<T extends PropertyType, V> = T extends StringConstructor
+    type SimpleValueType<T extends PropertyType, V> = T extends null
+        ? V
+        : T extends StringConstructor
         ? Satisfy<string, V>
         : T extends NumberConstructor
         ? Satisfy<number, V>