How to use the useSWRInfinite hook for paginated data fetching in Next.js



Image not found!!

To use the useSWRInfinite hook for paginated data fetching in Next.js, you'll first need to install the swr package if you haven't already:

bash
npm install swr

# or

yarn add swr

Then, you can follow these steps:

  1. Import the useSWRInfinite hook:

    Import the useSWRInfinite hook from the swr package in your Next.js component file:

    javascript
    import useSWRInfinite from 'swr/infinite';

  2. Define a function to fetch data:

    Create a function that will be responsible for fetching paginated data. This function should accept a pageIndex parameter, which will be used to determine which page of data to fetch.

    javascript
    const fetcher = async (url) => {
    const response = await fetch(url);
    return response.json();
};

  3. Use useSWRInfinite hook:

    Inside your Next.js component, use the useSWRInfinite hook passing in your fetch function and any other options you need.

    javascript
    const MyComponent = () => {
    const PAGE_SIZE = 10;

    const getKey = (pageIndex, previousPageData) => {
        if (previousPageData && !previousPageData.length) return null; // reached the end
        return `/api/data?page=${pageIndex + 1}&pageSize=${PAGE_SIZE}`;
    };

    const { data, error, size, setSize } = useSWRInfinite(getKey, fetcher);

    // Render your component using the `data` array
    // Handle loading and error states

    return (
        // Your component JSX
    );
};

  4. Handle pagination:

    Inside your component, handle how you want to display and interact with the paginated data. Typically, you'll have some UI elements like buttons or a scroll event listener to trigger fetching more data when the user reaches the end of the current data set.

    You can use the size and setSize values returned by useSWRInfinite to keep track of the current page and load more data.

    javascript
    const handleLoadMore = () => {
    setSize(size + 1);
};

    You can trigger handleLoadMore based on user interaction, such as clicking a "Load More" button or reaching the end of a scroll container.

  5. Render the data:

    Render the data fetched by useSWRInfinite inside your component based on your UI requirements.

    javascript
    return (
    <div>
        {data.map((pageData, index) => (
            <ul key={index}>
                {pageData.map((item) => (
                    <li key={item.id}>{item.name}</li>
                ))}
            </ul>
        ))}
        <button onClick={handleLoadMore}>Load More</button>
    </div>
);

    This will render each page of data as a separate list and provide a "Load More" button to fetch the next page.

That's a basic overview of how to use the useSWRInfinite hook for paginated data fetching in Next.js. You can customize it further based on your specific use case and UI requirements.

Category List