diff --git a/docs/docs/playground/demos/Playground/codes/reactive.ts b/docs/docs/playground/demos/Playground/codes/reactive.ts
index 2de83785..6672d848 100644
--- a/docs/docs/playground/demos/Playground/codes/reactive.ts
+++ b/docs/docs/playground/demos/Playground/codes/reactive.ts
@@ -36,7 +36,7 @@ const change = () => {
   },0);
 };
 
-render(<button onClick={ change } > change { $(reactive.b.b1.b2)}</button>);
+render(<button onClick={ change }> change { $(reactive.b.b1.b2)}</button>);
 `;
 
 const dict_atomx = `
diff --git a/packages/helux-core/src/consts/user.ts b/packages/helux-core/src/consts/user.ts
index 0959da4c..2bc5e459 100644
--- a/packages/helux-core/src/consts/user.ts
+++ b/packages/helux-core/src/consts/user.ts
@@ -1,6 +1,6 @@
 import { VER as limuVer } from 'limu';
 
-export const VER = '4.2.0';
+export const VER = '4.2.1';
 
 export const LIMU_VER = limuVer;
 
diff --git a/packages/helux-core/src/types/api.d.ts b/packages/helux-core/src/types/api.d.ts
index 11a18163..b6dbe6fe 100644
--- a/packages/helux-core/src/types/api.d.ts
+++ b/packages/helux-core/src/types/api.d.ts
@@ -1,6 +1,6 @@
 /*
 |------------------------------------------------------------------------------------------------
-| helux-core@4.2.0
+| helux-core@4.2.1
 | A state library core that integrates atom, signal, collection dep, derive and watch,
 | it supports all react like frameworks ( including react 18 ).
 |------------------------------------------------------------------------------------------------
@@ -68,7 +68,7 @@ import type {
 } from './base';
 
 export declare const cst: {
-  VER: '4.2.0';
+  VER: '4.2.1';
   LIMU_VER: string;
   EVENT_NAME: {
     /** 共享状态创建时的事件 */
diff --git a/packages/helux-utils/src/log.ts b/packages/helux-utils/src/log.ts
index dd1c4d27..31a80f42 100644
--- a/packages/helux-utils/src/log.ts
+++ b/packages/helux-utils/src/log.ts
@@ -23,9 +23,10 @@ export function tryAlert(err: any, options?: IAlertOpts) {
     errMsg = err.message;
   }
 
-  const canAlert = alertErr ?? isDebug();
-  if (canAlert) {
-    err && GLOBAL_REF.alert?.(`${prefixLabel}${errMsg}${suffixLabel}`);
+  // 还原为老写法（ 无 ?? 和 ?. ），防止某些版本 babel 编译报错
+  const canAlert = typeof alertErr === 'boolean' ? alertErr : isDebug();
+  if (canAlert && GLOBAL_REF.alert) {
+    err && GLOBAL_REF.alert(`${prefixLabel}${errMsg}${suffixLabel}`);
   }
   logErr && console.error(err);
   if (throwErr) {