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The required components are then rendered in HTML and sent to the clients. For medium- and large-scale apps, debugging takes more time then actually developing features. Redux DevTools makes it easy to take advantage of all Redux has to offer. With Redux, the state of your application is kept in a store, and each component can access any state that it needs from this store.

It works by allowing you to write “sagas” — special functions that take in actions and perform async tasks based on those actions. These sagas can be thought of as “mini-reducers” that handle the async logic of your app in a predictable and maintainable way. One of the key benefits of using middleware in Redux is that it allows you to add additional functionality to your Redux applications. For example, you can use middleware to handle async tasks, such as making API calls, or to perform side effects, such as updating the UI or dispatching additional actions.

The Pros and Cons of Using Redux with React

You might assume that keeping the app’s state global would result in some performance degradation. React Redux implements many performance optimizations internally so that your own connected component only re-renders when it actually needs to. Besides logging, it has great DevTools that allow you to time travel actions, persist actions on page refresh, and more. Reducers are based on the reduce function in JavaScript, where a single value is calculated from multiple values after a callback function has been carried out.

• Redux Logger allows you to log information about actions and the state of the store, which can be useful for debugging and understanding the flow of actions in your application.
• They are the only way you can send data from your application to your Redux store.
• The entire React application has to be then wrapped with that store.

While we won’t cover all implementation details, this example demonstrates the creation of query keys and an asynchronous query function. In the journey of front-end development, choosing the right state management solution can significantly impact the efficiency and maintainability what is redux used for of your application. Two popular libraries, Redux and React Query, have emerged as key players in this domain. Redux has long been the default choice for managing application state in React applications, but React Query offers a fresh and potent alternative.

Redux vs Context

Redux, while still widely used, has seen a shift in popularity toward more simple and modern alternatives like React Query. In contrast, Redux focuses on client-side state, centralizing application state management within the Client. Redux is suitable when you need precise control over the client-side state. With these changes, the ChangeColor component now uses Redux to manage the state. Users can change the color of the displayed text by typing their desired color in the input field and clicking the “Change text color” button.

However, it is important to implement Redux only if it fits your requirements and your project needs a state management tool. By logging actions and state, it is easy to understand coding errors, network errors, and other forms of bugs that might come up during production. As you can see in the example above, the component does not need to provide any state or method for its children components to share data among themselves. Everything is handled by Redux, which greatly simplifies the app and makes it easier to maintain.

What Do Best Practices in App UX Look Like?

In addition, the store is the central location where all application state changes occur. Global state solves issues mentioned in the section about the local component state. It prevents coupling between the component rendered elements and its state. No state has to be lifted as it already sits at the top of every component. The code is also more flexible allowing for easy movement of components. The problem with prop drilling also does not occur, and it is much easier to persist data between sessions when it is collected in one place.

During the last 16 months, maybe the most notable change in the React community is React hooks. I will add my experience using saga in production system in addition to the library author’s rather thorough answer. Modern front-end projects rely on many different tools, such as React, Storybook, Jest, Cypress, Tailwind, and… React Query has gained significant momentum in the React community, and it continues to receive active development and support. As a result, you can benefit from an extensive ecosystem of plugins and community-contributed integrations.

Redux FAQ: General

To enhance development and ensure type safety, we’ll utilize @lukemorales/query-key-factory. The choice depends on your application’s requirements, with React Query excelling in server data scenarios, while Redux is robust for client-side state management. If you’re looking for additional resources on this topic, you can read Client vs. Server and replace client-side. When choosing which to use, consider factors like app complexity, team size, and performance needs.

There are several different types of middleware available for Redux, each with its own unique set of features and capabilities. Redux Saga uses a declarative approach to async logic, which allows you to specify async logic as generator functions that yield effects. Redux Logger allows you to log information about actions and the state of the store, which can be useful for debugging and understanding the flow of actions in your application. Redux Loop allows you to manage async logic and side effects as plain objects, called “effects,” which can be dispatched as actions. As I mentioned Redux Saga is a middleware that allows you to handle complex async tasks in a declarative and easy-to-understand way.

How to Manage State in Your Applications – useState() vs Redux

When your application grows you can get easily lost by figuring out who is waiting for the action to be dispatched, or what everything happens when some action is being dispatched. Choosing one or another depends on many aspects like type and size of the project, what types of side effect your project must handle or dev team preference. With Redux Logger installed, you will see a log of each action that is dispatched in your console, along with the current state of the store. One common task that you might want to perform in a Redux application is making API calls to retrieve data from a server.

Redux Loop is a middleware for Redux that allows you to manage async logic and side effects in your Redux applications. It can be used to simplify async logic, such as making API calls, and to perform side effects, such as updating the UI or dispatching additional actions. Redux Saga is an another middleware that allows you to express async logic as generator functions. It is particularly useful for handling complex async tasks and performing side effects like API calls. Redux is used for managing states in JavaScript applications because it provides a centralized way or a predictable way for managing application state.

If this post makes me seem frustrated with sagas, it is because I am frustrated with sagas. So, another idea could be is to use generators with redux-thunk, but for me, it seems like trying to invent a bicycle with square wheels. I have seen a couple of projects where thunks have been treated as if they are controllers from the MVC patten and this quickly becomes an unmaintable mess.