Error: Requiring module "node_modules/react-native-tcp-socket/src/index.js

[arturmusin]

Hi, I've been struggling with this issue over a week. I create empty react-native application for MacOS and install "react-native-tcp-socket" package. When I try to use this library in my project I get "Error: Requiring module "node_modules/react-native-tcp-socket/src/index.js", which threw an exception: Invariant Violation: Native module cannot be null."

Could anyone please help me with that? I'm bashing my head against this wall over a week already...

` import React, { Component } from 'react'; import {Text,View} from 'react-native';

const tcpSocket = require('react-native-tcp-socket');

class App extends Component { render() { return (

Hello React Native Sockets!

);

} }

export default App; `

[Rapsssito]

@arturmusin, are you using expo?

[theteladras]

@Rapsssito I have experienced the same described issue that @arturmusin is having, on an expo ejected project.

[Rapsssito]

It might be an issue with expo new ejected project. Have you tested with the cache cleared? What RN version are you using?

[Lawjune]

Hi @Rapsssito,

I restarted the expo project and this issue resolved. But the expothrew an exception of Native module cannot be null. Is there any solution to make react-native-tcp-socket in an expo project?

Invariant Violation: Native module cannot be null.
at node_modules/react-native/Libraries/Core/ExceptionsManager.js:104:6 in reportException
at node_modules/react-native/Libraries/Core/ExceptionsManager.js:171:19 in handleException
at node_modules/react-native/Libraries/Core/setUpErrorHandling.js:24:6 in handleError
at node_modules/expo-error-recovery/build/ErrorRecovery.fx.js:12:21 in ErrorUtils.setGlobalHandler$argument_0
at [native code]:null in flushedQueue
at [native code]:null in invokeCallbackAndReturnFlushedQueue

Unable to start your application. Please refer to https://expo.fyi/no-registered-application for more information.
at node_modules/react-native/Libraries/ReactNative/AppRegistry.js:200:6 in runApplication
at [native code]:null in callFunctionReturnFlushedQueue

Thank you so much in advanced!

[Rapsssito]

@Lawjune, I am not familiar with expo, but as far as I know you cannot run any module with native code without "ejecting" your project first. Maybe someone with more experience with expo can help you.

[Lawjune]

@Rapsssito, thank you so much all the same. It's an expo issue existing for years since https://expo.canny.io/feature-requests/p/support-raw-tcp-sockets. Eventually I use the RN CLI to make it work. Thanks again!