Lock device in portrait orientation

I need to get my app to be locked in portrait orientation at all times. I’ve tried screen.lockOrientation(‘portrait’) in angular.module and .config but haven’t gotten it to work.

Hi! try to read this page : http://www.gajotres.net/changing-locking-screen-orientation-in-ionic-application/

I tried this but it’s not working…I copied his code by importing plugin with CLI and then tried screen.lockOrientation(‘portrait’); both in the angular.module and .config … I also tried changing preference in config.xml but still no luck