💡 A pure function is a function that will always return the same value if given the same parameters, i.e., the function depends on only the parameters and no external data. Remember, this data is not needed by the parent component, but because its children need to share data, it has to provide a state. While it’s mostly used as a state management tool with React, you can use Redux with any other JavaScript framework or library. It’s lightweight at 2KB (including dependencies), so you don’t have to worry about it making your application’s asset size bigger. Redux is a predictable state container designed to help you write JavaScript apps that behave consistently across client, server, and native environments, and are easy to test.

Redux can integrate with any UI framework, and is most frequently used with React. React-Redux is our official package that lets your React components interact with a Redux store by reading pieces of state and dispatching actions to update the store. Redux helps you deal with shared state management, but like any tool, it has tradeoffs.

Fetch Data with Redux-Thunk in React Native App

In Array.reduce() we returned the sum of the accumulator and current value. If you take the example of our bank scenario then after withdrawal, the money in your bank vault is no longer the same. It will be updated and again, the Cashier and Vault will remain in sync with the balance left in your account. Just like the cashier the reducer always returns the new state of your application.

Redux fundamental principles help in maintaining consistency throughout your application, which makes debugging and testing easier. For your action WITHDRAW_MONEY, you interact with the cashier…yeah??? This means if you want your money, your action needs to be passed through the cashier.

What Is Redux?

In Redux, Waters goes from the extreme of understatement in his earlier work to the extreme of overstatement and overwriting. Redux has its moments – not least in how Waters’ weathered, character-filled voice inhabits and adds weight to his original lyrics – but sometimes, less really is more. Connect and share knowledge within a single location that is structured and easy to search. Tutorials Point is a leading Ed Tech company striving to provide the best learning material on technical and non-technical subjects.

• In your Redux application based on the requirement, you can define as many actions as you want but every action flows through the reducer and that’s what we have done in the above code.
• It switches on the action type, and then whichever case matches with the dispatched action type, it makes the necessary update and returns the fresh new version of the updated state.
• Being a state management library, Redux will basically store and manage all the application’s states.
• Also, don’t get afraid of so many libraries available in Redux.
• The index.js file represents the root reducer, which combines all the individual reducers in the application.

In each of the folders create an index.js file that will be the entry point for each of the Redux components. Now refactor the application we have built before and put everything https://deveducation.com/ in its own place. In this section, we will talk about folder structure, and we will see how to put everything in specific folders/files to keep things organized.

When you are dispatching an action, it passes through the Reducer (cashier). This reducer function takes two arguments, first is the state itself, and second is the action object. The ones familiar with react will know that react is a component-based front end library tool that connects the various segments of the web page. In react, we use props (short for properties) in a component which allows the usage of non-static variables.

Redux provides a single store that you can use to manage a large amount of data. To help you along the way, Educative has created the Understanding Redux course, which is designed to give you a primer on the basics of Redux. It’s an interactive is redux necessary course, with plenty of coding challenges to make learning Redux not just easier, but more fun. While Redux is something that every developer should consider utilizing when developing their application, it’s not for everyone.

We will learn what Redux is at its core along with its three key principles. If we dig deeper into this statement, we see that Redux is a state management library that you can use with any JS library or framework like React, Angular, or Vue.