diff --git a/driver/js/examples/hippy-react-demo/src/modules/NativeEvent/index.jsx b/driver/js/examples/hippy-react-demo/src/modules/NativeEvent/index.jsx
deleted file mode 100644
index 446e8d88d..000000000
--- a/driver/js/examples/hippy-react-demo/src/modules/NativeEvent/index.jsx
+++ /dev/null
@@ -1,100 +0,0 @@
-import React from 'react';
-import {
-  ScrollView,
-  Text,
-  View,
-  StyleSheet,
-  callNative,
-  HippyEventEmitter,
-} from '@hippy/react';
-
-const styles = StyleSheet.create({
-  text: {
-    fontSize: 14,
-    color: '#242424',
-    alignSelf: 'center',
-  },
-  container: {
-    flex: 1,
-  },
-  itemTitle: {
-    alignItems: 'flex-start',
-    justifyContent: 'center',
-    height: 80,
-    borderWidth: 1,
-    borderStyle: 'solid',
-    borderColor: '#e0e0e0',
-    borderRadius: 2,
-    backgroundColor: '#fafafa',
-    padding: 10,
-    marginTop: 10,
-  },
-  itemContent: {
-    alignItems: 'flex-start',
-    justifyContent: 'center',
-    height: 100,
-    borderBottomWidth: 1,
-    borderLeftWidth: 1,
-    borderRightWidth: 1,
-    borderStyle: 'solid',
-    borderRadius: 2,
-    borderColor: '#e0e0e0',
-    backgroundColor: '#ffffff',
-    padding: 10,
-  },
-  normalText: {
-    fontSize: 14,
-    lineHeight: 18,
-    color: 'black',
-  },
-});
-
-export default class NativeEvent extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = {
-      infoText: '',
-      infoText2: '',
-    };
-  }
-
-  render() {
-    const { infoText, infoText2 } = this.state;
-    return (
-      <ScrollView style={styles.container}>
-        <View
-          style={styles.itemTitle}
-          onPress={() => {
-            const hippyEventEmitter = new HippyEventEmitter();
-            this.call = hippyEventEmitter.addListener('NORMAL_EVENT', (e) => {
-              this.setState({
-                infoText: JSON.stringify(e),
-              });
-            });
-            callNative('MyEvent', 'btnClicked');
-          }}
-        >
-          <Text>客户端向前端单向通信</Text>
-          <Text>点此终端会发送NORMAL_EVENT事件</Text>
-          <Text>{ `事件接收结果：${infoText}` }</Text>
-        </View>
-        <View
-          style={styles.itemTitle}
-          onPress={() => {
-            const hippyEventEmitter = new HippyEventEmitter();
-            this.call = hippyEventEmitter.addListener('COUNT_DOWN', (e) => {
-              this.setState({
-                infoText2: JSON.stringify(e),
-              });
-            });
-            callNative('MyEvent', 'addListener', 'COUNT_DOWN');
-          }}
-        >
-          <Text>客户端向前端单向通信的进阶用法</Text>
-          <Text>点此终端会发送COUNT_DOWN事件</Text>
-          <Text>{ `事件接收结果：${infoText2}` }</Text>
-        </View>
-      </ScrollView>
-    );
-  }
-}
diff --git a/driver/js/examples/hippy-react-demo/src/modules/TestModule/TestModule.js b/driver/js/examples/hippy-react-demo/src/modules/TestModule/TestModule.js
deleted file mode 100644
index ced33d0a3..000000000
--- a/driver/js/examples/hippy-react-demo/src/modules/TestModule/TestModule.js
+++ /dev/null
@@ -1,18 +0,0 @@
-import { callNative, callNativeWithPromise } from '@hippy/react';
-
-/*
- 自定义module
- */
-const TestModule = {
-  log(msg) {
-    callNative('TestModule', 'log', msg);
-  },
-  helloNative(msg) {
-    callNative('TestModule', 'helloNative', msg);
-  },
-  helloNativeWithPromise(msg) {
-    return callNativeWithPromise('TestModule', 'helloNativeWithPromise', msg);
-  },
-};
-
-export default TestModule;
diff --git a/driver/js/examples/hippy-react-demo/src/modules/TestModule/index.jsx b/driver/js/examples/hippy-react-demo/src/modules/TestModule/index.jsx
deleted file mode 100644
index 78aa21067..000000000
--- a/driver/js/examples/hippy-react-demo/src/modules/TestModule/index.jsx
+++ /dev/null
@@ -1,28 +0,0 @@
-import React from 'react';
-import { Text } from '@hippy/react';
-import TestModule from './TestModule';
-
-// 展示自定义Module的使用
-export default class TestModuleDemo extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = { hello: 'TestModule log' };
-  }
-
-  componentDidMount() {
-    TestModule.log('hello i am from js');
-    TestModule.helloNative({ hello: 'i am form js' });
-    TestModule.helloNativeWithPromise({ hello: 'i am form js' }).then((e) => {
-      this.setState({ hello: JSON.stringify(e) });
-    });
-  }
-
-  render() {
-    const { hello } = this.state;
-    return (
-      <Text style={{ color: 'red' }}>
-        {hello}
-      </Text>
-    );
-  }
-}
diff --git a/driver/js/examples/hippy-react-demo/src/modules/index.js b/driver/js/examples/hippy-react-demo/src/modules/index.js
index 2c91899f7..029d9c8cb 100644
--- a/driver/js/examples/hippy-react-demo/src/modules/index.js
+++ b/driver/js/examples/hippy-react-demo/src/modules/index.js
@@ -3,8 +3,6 @@
 export { default as Animation } from './Animation';
 export { default as AsyncStorage } from './AsyncStorage';
 export { default as Clipboard } from './Clipboard';
-export { default as NativeEvent } from './NativeEvent';
 export { default as NetInfo } from './NetInfo';
-export { default as TestModule } from './TestModule';
 export { default as WebSocket } from './WebSocket';
 export { default as UIManagerModule } from './UIManagerModule';
diff --git a/driver/js/packages/hippy-react/src/modules/network-info.ts b/driver/js/packages/hippy-react/src/modules/network-info.ts
index 42e225ac7..531c6d886 100644
--- a/driver/js/packages/hippy-react/src/modules/network-info.ts
+++ b/driver/js/packages/hippy-react/src/modules/network-info.ts
@@ -32,9 +32,9 @@ interface NetInfoRevoker {
 }
 
 const DEVICE_CONNECTIVITY_EVENT = 'networkStatusDidChange';
-const subScriptions = new Map();
+const subscriptions = new Map();
 
-let NetInfoEventEmitter: HippyEventEmitter;
+const NetInfoEventEmitter: HippyEventEmitter = new HippyEventEmitter();
 
 class NetInfoRevoker implements NetInfoRevoker {
   public constructor(eventName: string, listener: (data: any) => void) {
@@ -60,7 +60,6 @@ class NetInfoRevoker implements NetInfoRevoker {
  * @returns {object} NetInfoRevoker - The event revoker for destroy the network info event listener.
  */
 function addEventListener(eventName: string, listener: NetworkInfoCallback): NetInfoRevoker {
-  NetInfoEventEmitter = new HippyEventEmitter();
   let event = eventName;
   if (event && event === 'change') {
     event = DEVICE_CONNECTIVITY_EVENT;
@@ -75,8 +74,7 @@ function addEventListener(eventName: string, listener: NetworkInfoCallback): Net
       listener(data);
     },
   );
-  // FIXME: Seems only accept one callback for each event, should support multiple callback.
-  subScriptions.set(listener, handler);
+  subscriptions.set(listener, handler);
   return new NetInfoRevoker(event, listener);
 }
 
@@ -101,12 +99,12 @@ function removeEventListener(eventName: string, listener?: NetInfoRevoker | Netw
   if (count <= 1) {
     Bridge.callNative('NetInfo', 'removeListener', event);
   }
-  const handler = subScriptions.get(listener);
+  const handler = subscriptions.get(listener);
   if (!handler) {
     return;
   }
   handler.remove();
-  subScriptions.delete(listener);
+  subscriptions.delete(listener);
 }
 
 /**