So what Redux does is keep the application state in a store to make any required state easily accessible to each component from this store. Although it’s not new to programmers, as a JavaScript library, Redux still enjoys its enduring popularity. It’s a potent tool for managing application state in React projects while providing a reliable data layer. Action is static information about the event that initiates a state change.

• This task of handling multiple states from multiple components efficiently can become challenging when the application grows in size.
• With Redux, you can keep a record of the changes in your state and time travel back to these changes.
• In other words, if our application crashes, we lose the entire application state.
• If you feel middleware is required, you will enjoy it because it gives you a lot of power to do tons of great work with the best abstraction.
• Further in the above code, we just need to define the do something part to return a new state.

Furthermore, Redux is more efficient than React stand-alone because Context often forces re-renders. For more info, see Dan Abramov’s posts on You Might Not Need Redux and The Case for Flux, as well as the Redux FAQ on “when should I use Redux?”. Also, while you’re not using React, you might also be interested in an article I co-wrote about the benefits of using Redux in a React app. First, I have used angular2+ for a while, and so I am also trying to grab the idea from the what I have already know.

Understanding Redux: Beginner’s guide to modern state management

We will talk about changing/updating the state later in this blog. Right now consider a case in which you visit the bank and you didn’t perform any action so the bank balance remains the same. In Redux if you won’t perform any action and you don’t pass the Action as an argument in Reducer then the state will remain the same and the reducer will return the same state as a new state. At this point keep a new state being returned as the same state passed in.

When you add a comment using the form, it appears in the list. Behind the scenes in most implementations, this means listening to forms with a certain class. When one submits you retrieve the content of the form and make an AJAX request to your server with that payload. When it responds you either render the whole form again or render another ” with your templates and append it to the list. This is a very tightly coupled and complex series of operations.

Replies to “Understanding Redux: A tutorial with examples”

Let’s take a look at a basic implementation of React-Redux. Because state can be messy to manage, especially when there are a number of dynamic components, utilizing a state management system will help your future debugging. You have a todo-item component, and you want to program the component so that when a user clicks the item, it gets crossed out. You can have a state variable called isFinished and have its value be either True or False.

With Redux, there’s one general state in the store, and each component has access to the state. It is based on the reduce function in JavaScript, where a single value is calculated from multiple values after a callback function has been carried out. Remember, this data is not needed by the parent component, but because its children need to share data, it has to provide a state. If you’re just getting started with Redux, the video below is a great resource for beginners. Lastly, you can install the Redux DevTools that give you insights into your application’s current state to simplify debugging or testing your application.

It’s more opinionated with its predictable way of managing state, both a plus and a minus depending on your needs. The lack of flexibility might help prevent bugs, but could also be a disadvantage in certain situations. If you want easy recruiting from a global pool of skilled candidates, what is redux for we’re here to help. Our graduates are highly skilled, motivated, and prepared for impactful careers in tech. Nurture your inner tech pro with personalized guidance from not one, but two industry experts. They’ll provide feedback, support, and advice as you build your new career.