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:

Android (Java/Kotlin)​

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

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:

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

iOS (Objective-C/Swift)​

In your native module, use NSLog for custom logs:

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

Or, in Swift:

print("YourModuleName: \(message)")

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