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Showing content from https://reactnative.dev/docs/next/debugging-native-code below:

Debugging Native Code · React Native

If you are writing a Native Module and want to add custom logs to your module for debugging purposes, you can use the following method:

In your native module, use the Log class to add logs that can be viewed in Logcat:

java

import android.util.Log;

private void log(String message) {
    Log.d("YourModuleName", message);
}

To view these logs in Logcat, use this command, replacing YourModuleName with your custom tag:

shell

adb logcat "*:S" ReactNative:V ReactNativeJS:V YourModuleName:D

In your native module, use NSLog for custom logs:

objective-c

NSLog(@"YourModuleName: %@", message);

Or, in Swift:

swift

print("YourModuleName: \(message)")

These logs will appear in the Xcode console when running the app.

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