#atom

Subtitle:

React Query hook for paginated or infinite scrolling data fetching

Core Idea:

useInfiniteQuery extends the base query functionality with specialized support for paginated data and infinite scrolling interfaces, handling the complexity of page tracking and merging.

Key Principles:

1. Page Management:
   • Tracks and manages multiple pages of data as a unified dataset.
2. Progressive Loading:
   • Provides controls to load more data while preserving previously loaded pages.
3. Pagination Metadata:
   • Handles cursor-based or offset pagination with automatic tracking.

Why It Matters:

• Performance Optimization:
  • Loads data incrementally to improve initial load times and reduce bandwidth usage.
• Improved UX:
  • Enables infinite scrolling interfaces for content-heavy applications.
• Reduced Complexity:
  • Abstracts away the logic of merging paginated data and tracking pagination state.

How to Implement:

1. Define Query Function:
   • Create a function that accepts a page parameter and returns paginated data.
2. Configure Options:
   • Set up getNextPageParam to determine how to fetch the next set of data.
3. Implement UI Controls:
   • Add buttons or scroll handlers that call fetchNextPage/fetchPreviousPage.

Example:

• Scenario:

  • Loading and displaying a social media feed with infinite scrolling.

• Application:

import { useInfiniteQuery } from '@tanstack/react-query';

function Feed() {
const {
data,
fetchNextPage,
hasNextPage,
isFetchingNextPage
} = useInfiniteQuery({
queryKey: ['feed'],
queryFn: ({ pageParam = 1 }) =>
fetch(/api/feed?page=${pageParam}).then(res => res.json()),
getNextPageParam: (lastPage) =>
lastPage.nextPage || undefined,
});

return (

• Result:
  • Users can progressively load additional content without manual page tracking.

Connections:

• Related Concepts:
  • React Query - Parent library
  • useQuery - Base query hook
  • Infinite Scrolling - UI pattern
• Broader Concepts:
  • Pagination Patterns
  • Data Virtualization
  • Content Loading Strategies

References:

1. Primary Source:
   • TanStack Query documentation on useInfiniteQuery
2. Additional Resources:
   • "Building Efficient Infinite Lists in React" by Dominik Dorfmeister

Tags:

#react-query #infinite-scroll #pagination #data-fetching #performance

Connections:

Sources:

• From: useQuery