React Query Tutorial in Hindi #1 React Query Introduction
2React Query is a powerful and flexible data-fetching library for React applications. It simplifies the process of fetching, caching, synchronizing, and updating data from various sources, such as APIs, databases, and GraphQL endpoints. React Query is designed to work seamlessly with React and provides a set of hooks that enable efficient data management and a smooth user experience.
React Query V4: The Solution for Effortless Data Fetching
Key Features of React Query:
Data Fetching: React Query provides a set of hooks to fetch data from APIs and other sources. These hooks include useQuery for fetching data, useMutation for making data mutations (POST, PUT, DELETE, etc.), and usePaginatedQuery for paginated data fetching.
Caching: One of the standout features of React Query is its built-in caching mechanism. It automatically caches the results of API requests in memory, so subsequent requests for the same data can be served from the cache without hitting the network again. The cache is fully customizable and can be configured to suit your application's needs.
Background Data Updates: React Query can automatically keep the data in sync with the server in the background. It can refetch the data at predefined intervals or after specific mutations have occurred, ensuring that the UI is always up to date.
Optimistic Updates: With optimistic updates, React Query allows you to update the UI optimistically before the API response is received. This provides a snappy user experience by avoiding the need to wait for the server response to update the UI.
The idea with optimistic updates is that the application will assume that the server will respond “It was a success. You accomplished your goal. Whatever you needed me to do, I did it.” So again, taking Instagram as an example, Instagram will show that you liked the post. A transparent heart will overlay the Instagram post and the heart icon will turn red. Instagram does this, optimistically; they visually show you that you liked the post without first getting confirmation from the backend that that entire operation — of liking the post — was accepted.
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