Js exeception not caught in dev mode until first render

[dowmeister]

Hi,

i'm trying to integrate this module

In index.js (main entrypoint)

import {
    AppRegistry
} from 'react-native';
import App from './App';

import {
    Alert
} from 'react-native';
import {
    setJSExceptionHandler,
    getJSExceptionHandler
} from 'react-native-exception-handler';
import {
    setNativeExceptionHandler
} from 'react-native-exception-handler';

const errorHandler = (e, isFatal) => {

    console.log('------------------- JS HANDLER ------------------');
console.log('------------------- CUSTOM JS HANDLER ------------------');
    console.log(error);

    if (isFatal) {
        Alert.alert(
            'Unexpected error occurred',
            `
          Error: ${(isFatal) ? 'Fatal:' : ''} ${e.name} ${e.message}
  
          We will need to restart the app.
          `, [{
                text: 'Restart',
                onPress: () => {
                    //RNRestart.Restart();
                }
            }]
        );
    } else {
        console.log(e); // So that we can see it in the ADB logs in case of Android if needed
    }
};

const setNativeHandler = (exceptionString) => {

    console.log('------------------- NATIVE HANDLER ------------------');
    console.log(exceptionString);
};

console.log('------------------- JS HANDLER ------------------');
console.log('Entering exception handling');

setJSExceptionHandler(errorHandler, true);

setNativeExceptionHandler(setNativeHandler, false);

AppRegistry.registerComponent('TruckyV2', () => App);

In adb log i see

------------------- JS HANDLER ------------------ Entering exception handling

Don't see ------------------- CUSTOM JS HANDLER ------------------

In Home.js constructor (called from App), i've added this.test() to force fire error, continue to see the RN default red screeen

What's wrong?

"react": "^16.3.1",
"react-native": "^0.55.3",
"react-native-exception-handler": "^2.7.5",

Thanks

[a7ul]

Hi @shardick Yes, The exception handler doesnt catch the error on first render. Its an issue being tracked here #36. The issue is that the js exception handler module doesn't seem to fire before first render.

The issue occurs only till first render of the app.

You can try moving the this.test() call to a button click maybe to test it.

In the meanwhile I ll mark this as a bug and track it here.

[dowmeister]

Thanks @master-atul

Confirmed, it works on next interaction

[aks1994]

Hello, is there any fix for this planned?

[a7ul]

Not really at the moment. I am not sure how to solve this.