What Is React Redux and How Do You Use it?

Ultimately, these concepts are used to create a simple state management architecture. One of the key ways Redux does this is by making use of a redux store, such that the entire application is handled by one state object. Redux is strict about how code what does redux do should be organized, which makes it easier for someone with knowledge of Redux to understand the structure of any Redux application. This generally makes it easier to maintain, and also helps you segregate your business logic from your component tree.

what does redux do

UseDispatch is a hook we use when we want to dispatch a certain action to update the state. While using React, it is quite easy to get caught up in a ‘Prop-drill’ as the app’s size gets increased. Actions are payloads of information that are dispatched to the store. Dispatching an action is the only way to manipulate the store.

Learn to think in React

To deepen your fundamental concepts in Redux let’s take an example of a simple React application, and we will refactor the app to introduce Redux in it. You’re aware that there is a process that you need to follow to withdraw your money. When you talk to the cashier, he takes some time, checks some https://deveducation.com/ details, enters some commands, and hands over the cash to you. Let’s relate this example to Redux and understand some of its terminologies. Wearing all of these hats has provided him with a wide range of expertise and the ability to manage teams, create solutions, and understand industry needs.

what does redux do

This also eliminates the need to write more code, which is awesome in my opinion. When working with functional programming, it’s important to understand concepts like pure functions, anonymous functions, closures and higher order functions just to mention a few. Yes, it’s possible to write a complete application using nothing but a framework. But as your application gets more complex, with more and more components, using just a framework to manage this can get very tricky. Furthermore, while Context API has made it easier to pass data between components without using Redux, it’s not a state manager, which means you’re missing out on a lot of other features. Redux offers tools that make it incredibly easy for you to debug, test, and track your state.

How does Redux work?

There is a central store that holds the entire state of the application. Each component can access the stored state without having to send down props from one component to another. State management is essentially a way to facilitate the communication and sharing of data across components. It creates a tangible data structure to represent the state of your app that you can read from and write to. That way, you can see otherwise invisible states while you’re working with them.

  • By the end of this post, you’ll understand what Redux is for, and how to know when it’s time to add it to your own app.
  • Remember, this data is not needed by the parent component, but because its children need to share data, it has to provide a state.
  • The required components are then rendered in HTML and sent to the clients.
  • Note how in the above example, we dispatch an action on click of the button.

As we mentioned earlier, Redux is a standalone library that can be used with different JavaScript frameworks including Angular, Inferno, Vue, Preact, React, etc. In the ever-evolving world of web development, new JavaScript libraries are always being released. But chasing after each new release without fully understanding their benefits isn’t a good idea. To understand why you should use React Redux, it may help to understand what a «UI binding library» does. React Redux is the official Redux UI binding library for React. If you are using Redux and React together, you should also use React Redux to bind these two libraries.

How to connect an app to the Redux store

If the data needs to be passed from a parent to a child deep down the tree, this can still be accomplished using React utilities like Context. But when it comes to sharing the state between components on the same level, Redux is the inevitable option. Redux is used to maintain and update data across your applications for multiple components to share, all while remaining independent of the components. Redux allows you to manage your app’s state in a single place and keep changes in your app more predictable and traceable, making it easier to understand the changes happening in your app.

This allows you to separate your React application components as presentational and container components based on their connection to the Redux store. React provides two major mechanisms for providing data to components, props and state. Props are read-only and allow a parent component to pass attributes to a child component. A data gets initialized on a parent level component which has multiple descending children component. And now, the data has to be accessed by a descending children component. In such situation, the data has to be passed through props to props from parent to several layers of children component.

what does redux do

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