Head-to-Head: Harlem vs Constate Analysis


v3.1.8(7 months ago)

This package is 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. It provides a simple and intuitive API for managing application state and handling state changes. With @harlem/core, you can easily define and update reactive state variables, create computed properties, and subscribe to state changes.

Alternatives: redux, mobx, vuex

Tags: javascriptstate-managementreactivelightweight


v3.3.2(over 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: 0Monthly npm downloads

Constate is a JavaScript library that provides an easy way to create and consume context in React. It helps manage application state by enabling you to define context and its associated reducers in one place. With constate, you can create reusable and composable state management logic that can be used across multiple components and even across different React applications.

Alternatives: redux, MobX, React context API

Tags: javascriptlibrarystate-managementreact



Both @harlem/core and constate have a moderate level of popularity within the React community. However, @harlem/core is relatively newer compared to constate, which has been around for some time and has garnered a larger user base.


@harlem/core and constate both aim to provide state management solutions for React applications. However, they take different approaches. @harlem/core is inspired by Vuex and Redux and follows a centralized store pattern with actions, mutations, and getters. constate, on the other hand, focuses on local component state management and uses React hooks.


Both @harlem/core and constate offer similar functionality, allowing you to manage state within your React components. @harlem/core provides a more traditional store-based approach, while constate provides a simpler and more lightweight solution for managing local component state. The choice depends on the complexity and scale of your application.

Developer Experience

constate offers a more straightforward and intuitive API using React hooks, making it easier for developers to work with and understand. @harlem/core's API is slightly more complex, especially if you are not familiar with Vuex or Redux. However, if you have experience with those libraries, @harlem/core may feel more familiar and comfortable.


Both @harlem/core and constate can handle state management in small to medium-sized applications effectively. However, if you anticipate your application growing in complexity and requiring advanced features like middleware or time-travel debugging, @harlem/core's Vuex/Redux-inspired architecture may be a better fit. constate may be more suitable for simpler projects or cases where local component state management is sufficient.

Community Support

constate has gained a significant following over time and has an active community on platforms like GitHub and npm. @harlem/core is newer and has a smaller community, but it is still actively maintained and supported. Consider the community support and availability of resources, such as examples, tutorials, and documentation, when choosing between the two packages.