seng-disposable-event-listener

The DisposableEventListener is a wrapper around the native addEventListener method, which makes it easier to remove the handlers. By calling the returning function, the listener is removed

seng-device-state-tracker

DeviceStateTracker is a utility class that tracks which media query is currently active using the matchMedia API.

seng-disposable-manager

Utility class for cleaning up various destructible things like timeouts, disposable instances and whatever you want to add.