1. pushmanager api

  2. pushmanager api: getsubscription

  3. pushmanager api: haspermission

  4. pushmanager api: permissionstate

  5. pushmanager api: register

  6. pushmanager api: registrations

  7. pushmanager api: subscribe

  8. pushmanager api: `supportedcontentencodings` static property

  9. pushmanager api: unregister

  10. pushmanager api: available in workers

  11. serviceworkerregistration api: pushmanager