console.log browser in android emulator

If you are using Android Studio; you can open your Logcat (Alt+6) and filter for: :CONSOLE

Filtering for only :CONSOLE (rather than INFO:CONSOLE) will display all types of console messages (including ERROR, WARN, etc).

Command - get log from the emulator

adb -e logcat 

adb.exe can be found at $your_installation_path$\android sdk\platform-tools

more detailed https://docs.microsoft.com/ru-ru/xamarin/android/deploy-test/debugging/android-debug-log?tabs=windows

Open this url on your chrome

chrome://inspect