I just added it with ionic plugin add cordova-plugin-background-mode
In the code I then add this after the imports:
declare var cordova:any;
and use this:
platform.ready().then(
() => {
console.log("MyApp::constructor platform.ready");
cordova.plugins.backgroundMode.setDefaults({
title: 'My App Name',
text: 'Active in background...');
cordova.plugins.backgroundMode.enable();
}
);