Debug ionic 4 and react app from android emulator

i created a new ionic 4 react app and added capacitor to this.

after this i compiled the react app in build folder

now created android platform using capacitor and i was able to run the react app in android.

Also by going to chrome remote devices i was able to connect with the emulator.

Now my problem is there i can see only compiled js files, and i want to see and debug this like a react code. how can i get the source map there

please help.