cordova.js not available while running in chrome
Cordova is only included once your app is built to be run on a device, and so it's not available while testing in a browser. This of course means that plugins relying on Cordova wont work either. That's a limitation of testing in a browser. You can disregard the error.
To test all functionality you should test in an emulator or a real device.
no need to add browser platform you can test it usingionic cordova run android -lit will open your emulator and will show messages in consol of browser