OneSignal Cordova Push Notification Plugin
This is a plugin based on onesignal-cordova-plugin. Please visit their repository for help with everything except the unique functionality I provide.
This plugin allows you to send background notifications on Android. To accomplish this, you must add "content_available": true to the data object on your notification. If the app is open when this notification is received, handleNotificationReceived will be called with the argument being a JSON object j such that j['payload']['additionalData'] is the data object you sent. No visible notification will be shown as long as the notification has no title or content.