redux-cycles

Handles side effects explicitly via drivers like HTTP, pushing impure operations to the edges and keeping business logic pure, as shown in the example where requests and responses are separated into distinct streams.

Expresses logic as pure functions over streams of actions and state, avoiding imperative code and improving maintainability, with cycles that are easily composable using utilities like combineCycles.

Cycles are pure functions, so testing involves providing input streams and asserting on output streams, making unit tests straightforward and less reliant on mocks, as highlighted in the testing section.

Built on observables, which are easier to statically type compared to generators used in redux-saga, reducing type-related bugs in complex async workflows, as noted in the comparison with other libraries.