Head-to-Head: Harlem vs NGXS Analysis


v3.1.8(about 1 year ago)

This package was last published over a year ago. It may not be actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 1Monthly npm downloads

@harlem/core is a state management library for JavaScript applications, offering a simple and efficient way to manage application state. It provides a centralized store for state management, allowing components to access and update state without the need for complex configurations. @harlem/core emphasizes a reactive and immutable approach to state management, ensuring predictable and scalable application behavior.


Tags: javascriptstate-managementreactiveimmutablestore


v3.8.2(6 months ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 1Monthly npm downloads

@ngxs/store is a state management library for Angular applications, inspired by Redux. It provides a simple and efficient way to manage the state of your application using a single store and immutable state changes. With @ngxs/store, you can easily define actions, selectors, and reducers to handle state changes in a predictable and testable manner.


Tags: angularstate-managementreduximmutable-statepredictable-state-changes



Both @harlem/core and @ngxs/store are popular state management libraries in the JavaScript ecosystem. However, @ngxs/store has a longer history and a larger user base, making it more widely known and adopted.


@ngxs/store follows a state management pattern called Redux, which uses a central store and immutable data flow. On the other hand, @harlem/core is inspired by Recoil and implements an atom tree structure, allowing for fine-grained state management and localized reactivity.

Integration with Frameworks

@ngxs/store is specifically designed for Angular applications and tightly integrates with Angular's change detection system. It provides decorators, dependency injection, and seamless integration with Angular's component lifecycle. @harlem/core, on the other hand, is framework-agnostic and can be used with any JavaScript framework or library, making it more versatile.

Developer Experience

@ngxs/store provides a more explicit and structured approach to state management, with strong typing and IDE support. It also offers various plugins and devtools for debugging and inspecting the state. @harlem/core focuses on simplicity and minimal configuration, providing a more lightweight and intuitive developer experience.

Ecosystem and Tooling

@ngxs/store has a large ecosystem and community support, with various plugins, integrations, and extensions available. It also supports time-travel debugging and has extensive documentation. @harlem/core is a newer library and has a smaller ecosystem, but it offers modern tooling like TypeScript support and has a growing community.


Both libraries aim for good performance, but @harlem/core emphasizes efficient reactivity and localized state updates. It leverages modern JavaScript features like proxies to achieve optimal performance. @ngxs/store also focuses on performance optimizations and provides features like memoized selectors and change detection strategies for better performance in Angular applications.