Possible Unhandled Promise Rejection Error

[juneyoung-kang]

I was following this official react native tutorial and I've already added react-native-activity-feed in my project. But, my application shows nothing and prints some error like below.

Error

Possible Unhandled Promise Rejection (id: 0): TypeError arguments[0].indexOf is not a function...

Screenshot

Code

import React from 'react';
import SafeAreaView from 'react-native-safe-area-view';
import { StreamApp, FlatFeed } from 'react-native-activity-feed';

const App = () => {
  return (
    <SafeAreaView style={{flex: 1}} forceInset={{ top: 'always' }}>
      <StreamApp
          apiKey="APIKEY"
          appId="APPID"
          token="TOKEN"
      >
        <FlatFeed />
      </StreamApp>
    </SafeAreaView>
  );
};

export default App;

How to resolve this error...? I need some help.

[JelteF]

That's weird. Two questions:

• Did you actually replace the APIKEY, APPID and TOKEN with the values from the tutorial?
• Did you do the final setup steps for the native version of this library? https://github.com/GetStream/react-native-activity-feed#final-setup-steps-for-the-react-native-activity-feed-package

[juneyoung-kang]

• Yes. I’ve already replaced with real values.
• Yes. I’ve done step 1 ~ 4.

[JelteF]

Googling this error points me here: facebook/react-native#14364
That's definitely possible, since I think there's probably some console warn errors in our code. Can you confirm that you are building a production build and not a dev one?

[juneyoung-kang]

Thanks for helping me. I'm building a development build now, but I wonder why the contents are not displayed properly even if the console.warn or console.log doesn’t happen? 😥

[JelteF]

Are the contents not displayed properly even with de development build?

And also, do I understand correctly that changing to a development build fixed the issue? In that case I'll remove the console.warn and console.log calls from the lib (or make sure they are not included in production builds).