Cordova Detect if user is leaving app or starting call (iOS)

I recently discovered Cordova, and started building an app that i've been thinking of. I need to figure out if i, through Cordova, can detect if the user is leaving the app (not locking the phone), or e.g. picking up a phone call, is there an event for this that i can bind to? I've searched through the most npm-library packages and did a lot of research but can't really find a good answer.