Redux
Redux is a predictable state container for JavaScript applications, primarily used with React but compatible with other frameworks. It centralizes application state in a single store, making state changes predictable and easier to debug through a unidirectional data flow. It enforces immutable state updates via pure reducer functions and actions, facilitating features like time-travel debugging.
Developers should learn Redux when building complex, large-scale applications where managing shared state across many components becomes challenging. It's particularly useful for applications with frequent state updates, such as dashboards, e-commerce platforms, or collaborative tools, as it provides a structured way to handle state logic and improves maintainability. Redux also integrates well with middleware like Redux Thunk or Redux Saga for handling asynchronous operations.