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Learn how to efficiently fetch data on component load using React-Redux and Axios. This guide is perfect for beginners in React and Redux looking to manage state effectively.
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How to Fetch Data on Component Load in React-Redux with Axios

Fetching data from an API on component load is a common necessity in modern web applications. If you're building a React application and using Redux for state management, this task can seem daunting at first. In this post, we'll walk through the steps required to fetch data from an API using Axios, and store it in the Redux state when the component loads. Whether you are new to these technologies or just looking for a refresher, this guide will help you understand the process clearly.

Understanding the Problem

Let's say you want to show a list of food items fetched from an API when a particular component (FoodScreen in this case) loads. Your existing components are structured into a parent component called SalesDesk, and from there, you want to manage the data flow to FoodScreen. However, as a beginner to React and Redux, you're unsure how to properly initiate the API call upon the component's initial load.

Here’s a simplified approach to the problem:

Use Axios to make the API call.

Use Redux to store the data in the application's state.

Make sure the request happens when the component mounts.

Solution Overview

To solve this issue, we need to use the useDispatch hook from Redux to dispatch an action that will trigger the API call when the SalesDesk component mounts.

Step-by-Step Implementation

Set Up API Calls

To start, we need a function to fetch data using Axios. Let's define this in an API.js file as follows:

[[See Video to Reveal this Text or Code Snippet]]

Here, we create an asynchronous function GetAllItems that fetches data from the given API_URL. Once we receive the response, we dispatch an action to save this data.

Set Up Redux Reducer

Next, we need to handle the dispatched data with a reducer. The ItemsReducer.js will look like this:

[[See Video to Reveal this Text or Code Snippet]]

Please note that we now store the fetched data directly in the state, which will help later when we need to access this data.

Define Actions

In SalesAction.js, make sure the action is set up properly to carry the fetched data:

[[See Video to Reveal this Text or Code Snippet]]

Fetch Data on Component Load

Finally, modify the SalesDesk component to fetch the data on load using the useDispatch hook from React-Redux:

[[See Video to Reveal this Text or Code Snippet]]

The dispatch(GetAllItems()) is placed inside the useEffect hook, ensuring that it runs when the component mounts.

Displaying the Fetched Data

Inside the FoodScreen component, you can now retrieve the data from the redux store and display it. You can utilize the useSelector hook to access the state, as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Using Axios and Redux to manage fetching data from an API on component load is straightforward once you understand the process. By following the steps outlined, you can effectively set up your application to fetch and display data seamlessly.

Now that you have the basic implementation, feel free to experiment further, and don't hesitate to ask questions if you encounter any obstacles. Happy coding!