Redux (JavaScript library)

Redux is a small library with a simple, limited API designed to be a predictable container for application state. It operates in a similar fashion to a reducing function, a functional programming concept.

It is influenced by the functional programming language Elm.[3]

Redux was created by Dan Abramov and Andrew Clark in 2015.[4] Abramov began writing the first Redux implementation while preparing for a conference talk[5] at React Europe[6] on hot reloading. Abramov remarks, "I was trying to make a proof of concept of Flux where I could change the logic. And it would let me time travel. And it would let me reapply the future actions on the code change."[7]

Abramov was struck by the similarity of the Flux pattern with a reducing function. "I was thinking about Flux as a reduce operation over time... your stores, they accumulate state in response to these actions. I was thinking of taking this further. What if your Flux store was not a store but a reducer function?"[4]

Abramov reached out to Andrew Clark (author of the Flux implementation Flummox) as a collaborator. Among other things, he credits Clark with making the Redux ecosystem of tools possible, helping to come up with a coherent API, implementing extension points such as middleware and store enhancers.[4]

In February 2019, useReducer was introduced as a React hook in the 16.8 release. It provides an API that is consistent with Redux, enabling developers to create Redux-like stores that are local to component states.[8]

• Official website
• GitHub