# Advanced

- [Action Handlers](https://www.ngxs.io/v3.8/advanced/action-handlers.md)
- [Actions Life Cycle](https://www.ngxs.io/v3.8/advanced/actions-life-cycle.md)
- [Cancellation](https://www.ngxs.io/v3.8/advanced/cancellation.md)
- [Composition](https://www.ngxs.io/v3.8/advanced/composition.md)
- [Error Handling](https://www.ngxs.io/v3.8/advanced/errors.md)
- [Ivy Migration Guide](https://www.ngxs.io/v3.8/advanced/ivy-migration-guide.md)
- [Lazy Loading](https://www.ngxs.io/v3.8/advanced/lazy.md)
- [Life-cycle](https://www.ngxs.io/v3.8/advanced/life-cycle.md)
- [Mapped Sub States](https://www.ngxs.io/v3.8/advanced/mapped-sub-states.md)
- [Meta Reducers](https://www.ngxs.io/v3.8/advanced/meta-reducer.md)
- [Monitoring Unhandled Actions](https://www.ngxs.io/v3.8/advanced/monitoring-unhandled-actions.md)
- [Optimizing Selectors](https://www.ngxs.io/v3.8/advanced/optimizing-selectors.md)
- [Options](https://www.ngxs.io/v3.8/advanced/options.md)
- [Selector Utils](https://www.ngxs.io/v3.8/advanced/selector-utils.md)
- [Shared State](https://www.ngxs.io/v3.8/advanced/shared-state.md)
- [State Token](https://www.ngxs.io/v3.8/advanced/token.md)
- [State Operators](https://www.ngxs.io/v3.8/advanced/operators.md)
- [Sub States](https://www.ngxs.io/v3.8/advanced/sub-states.md)