ngxeventcore

ngxeventcore is an open-source Angular library that provides a centralized event bus to support decoupled communication across components and services. It implements a publish-subscribe pattern to reduce tight coupling and to enable scalable event-driven architectures in Angular apps.

At its core, ngxeventcore exposes a singleton EventBus service that can be injected anywhere. Events are represented as simple classes or identifiers; producers publish events; consumers subscribe to event types. The system is built on RxJS, using Observables to deliver events asynchronously with standard error handling and cancellation via unsubscribing.

Key features include: typed events for compile-time safety, a pluggable middleware pipeline for filtering, transformation, and auditing, support for multiple subscriptions per event, and a lightweight footprint with no global state beyond the bus. The library emphasizes testability, with mock buses and helper utilities.

Typical usage: install and import NgxEventCoreModule, inject NgxEventBus. Define an event class UserRegisteredEvent and publish: eventBus.publish(new UserRegisteredEvent(userId)); Subscribe: eventBus.subscribe(UserRegisteredEvent, (evt) => handleUserRegistered(evt));

Relationship and status: works alongside other Angular state management approaches such as NgRx; it does not replace them but complements decoupled event communication. It is maintained by a community of contributors with regular releases.