f8.1/sdk/dart/package-fuchsia_modular_lifecycle/package-fuchsia_modular_lifecycle-library.md

# lifecycle library






    *[<Null safety>](https://dart.dev/null-safety)*



<p>The lifecycle interface defines a service which allows running components
to be notified when lifecycle events happen in the system.</p>


## Classes

##### [Lifecycle](../package-fuchsia_modular_lifecycle/Lifecycle-class.md)



Allows running components to be notified when lifecycle events happen in the
system.