Redux is one of the important libraries in front-end development now-a-days. It is a foreseeable state container for JavaScript apps. It’s not a traditional library or a framework like Underscore.js and AngularJS, rather it will be better to say that it’s an application data-flow architecture .

Redux was created by Dan Abramov around June 2015. It was inspired by Facebook’s Flux and functional programming language Elm. It got very popular so quickly due to its simplicity, low size (only 2 KB) and great documentation.

For application state management, redux is mostly used. It maintains the state of an entire application in a single immutable state tree (object), which can’t be changed directly.A new object is being created by using actions and reducers,when something changes.

Redux Data Flow

Redux Data Flow

Benefits Of Redux

1.Predictability of outcome
There is always one source of truth, the store, with no confusion about how to sync the current state with actions and other parts of the application.

2.Maintainability
Having both a predictable outcome as well as strict structure makes the code more easier to maintain.

3.Organization
Redux is stricter about how the code should be well organized, for which it makes the code more consistent as well as easier for a team to work with.

4.Server rendering
This is very helpful, especially for the initial render, making for a better user experience as well as search engine optimization.

5.Developer tools
From actions to state changes, developers can track everything going on in the app in real time.

6.Community and ecosystem
This is a huge plus point whenever you’re learning or using any kind of library or framework. Having a community behind Redux makes it even more appealing to use.

7.Ease of testing
The first rule of writing testable code is to write small functions that do only one thing and also that are independent.