react query full course with common patterns best practices
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react query full course: a comprehensive guide
introduction to react query
*react query* is a powerful library for managing server state in react applications. it simplifies data fetching, caching, synchronization, and updates, making it easier to work with asynchronous data in your react components.
key features of react query
**data fetching**: simple and effective way to fetch data from apis.
**caching**: automatically caches responses to prevent unnecessary requests.
**synchronization**: keeps your data in sync between the server and client.
**background updates**: automatically refetches data in the background.
**error handling**: built-in error handling mechanism.
installation
to get started with react query, you need to install the library:
basic usage
setting up a query client
before using react query, you need to set up a `queryclient` and wrap your application with the `queryclientprovider`.
fetching data
to fetch data, use the `usequery` hook. here’s a basic example:
mutations
to handle data updates or mutations (like post, put, delete requests), use the `usemutation` hook.
query keys
react query uses query keys to identify queries. query keys can be strings or arrays. using arrays allows you to pass additional parameters.
query invalidation
react query automatically refetches queries when data changes (mutations). you can also manually invalidate queries using `queryclient.invalidatequeries`.
pagination and infinite scrolling
react query supports pagination and infinite scrolling. for pagination, you can use the `usepaginatedquery` hook or manage your own state and fetch data based on the current page.
best practices
1. **use query keys wisely**: use unique query keys for different data requests to avoid caching issues.
2. **error handling**: always handle errors gracefully. use `onerror` callbacks in mutations.
3. **refetching strategies**: utilize refetching options like `refetchonwindowfocus`, ...
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React Query
full course
best practices
common patterns
data fetching
caching strategies
server state management
asynchronous operations
React hooks
pagination techniques
optimistic updates
error handling
query invalidation
performance optimization
state synchronization
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