How to Use Redux and Redux Toolkit Tutorial for Beginners

Next, we define a counterReducer function that accepts the current state and the dispatched action. Let’s define actions we want to dispatch to the reducer when the user clicks the increase or decrease button. We’ll create a simple webpage that allows you to increase or decrease a counter in the state using plus and minus buttons. We’ll use a single index.html document that contains a script tag with all the necessary code.

what is redux for

Its intended usage adopts the design principles of React – writing declarative components. For medium- and large-scale apps, debugging takes more time then actually developing features. Redux DevTools makes it easy to taker advantage of all Redux has to offer. 💡 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.

Step 7: How to set up Redux Actions

While the online tutorials and guides provided helpful information, I needed more clarity to really understand Redux. So the problem is when multiple components that need to share and use the same state. Please give me a video tutorial for this it will more transparent and easy to learn as your convenience. If you’d like to learn more about React, take a look at our How To Code in React.js series, or check out our React topic page for exercises and programming projects. There are a lot more things you can do with Redux, from keeping data in sync with a database, to authentication and keeping track of user permissions.

what is redux for

Once you understand how everything fits together, we’ll look at using Redux Toolkit to simplify things. Redux Toolkit is the recommended way to build production apps with Redux, and is built on all of the concepts that we will look at throughout this tutorial. Once you understand the core concepts covered here, you’ll understand how to use Redux Toolkit more efficiently. Whenever we dispatch an action with a certain type, we need to make sure to have appropriate reducers to handle that action. The state of the whole application is stored in the form of a JS object tree in a single store as shown below.

How to Get User’s Location in React.js

Just like how the mail carrier delivers mail to different departments, dispatch delivers actions to various reducers in your Redux store. Each reducer is like a department in the company what is redux for that processes the mail and updates its own part of the company’s data. An action is an object that describes what changes need to be made to the state of your application.

And firing the action of adding one item to the cart again will increase the number of items in the cart to 2. We’ll talk more about actions and reducers in the following sections. Being a state management library, Redux will basically store and manage all the application’s states.

Then we pass that reducer function to the createStore function as the first argument and 0 as the initial value of the state as the second argument. One of the many benefits of Redux is that all data in an application follows the same lifecycle pattern. The logic of your app is more predictable and easier to understand, because Redux architecture follows a strict unidirectional data flow. Reducers specify how the application’s state changes in response to actions that are dispatched to the store. One thing most people find difficult about Redux is knowing when to use it. The bigger and more complex your app gets, the more likely it’s going to be that you’d benefit from using Redux.

  • In case any project needs a state management tool, Redux is the best option to reap the benefits in the long run.
  • When you created an account in your bank, you might have deposited some amount in your account, and if you ask the cashier for your bank balance they’ll look it up and tell it to you.
  • Redux is a popular Javascript library used to manage state in web applications.
  • You can use the Redux library with any frontend framework, such as React, Angular, or even Vue.