React Query |TanStack Query:Server State Management in React

Discover how useQuery fetches data, caches results, and synchronizes server state across components, with a provider enabling access to features and background updates for slow or offline networks.

Explore the syntax of useQuery in TanStack Query, using a unique key and an async fetch function that returns a promise, with optional options like stale time and cache time.

Explore the useQuery hook to fetch and update data in a react application. Understand the syntax: query key, fetch function, and options like fetch interval, stale time, cache time.

Learn to use useQuery to fetch a list of users from an API in a React app, exposing data, loading, and other query properties for display.

Explore the useQuery return object in React Query, examining query result state, fetch status, and data handling, including automatic refetch on focus and interpreting loading, error, and success.

Display loading, data, and error states using React Query by destructuring useQuery, leveraging isLoading and isError (or status), and rendering user properties like avatar and email.

Master how query keys uniquely identify each use query hook, enabling caching, updates, and invalidations in react query, with keys as strings or arrays that map data in the cache.

Query keys act as unique, descriptive identifiers for fetched data, enabling caching, invalidation, prefetching, pagination, and cross-component synchronization to align client and server state.

Learn the types of query keys in React Query: string keys for simple data, object keys for fine-tuned control, and array keys for parameterized requests, with user data examples.

Unpack using query keys as arrays and single strings in React Query to fetch a single user with a dynamic id, showing UI updates as keys change.

Rewrite the single user fetch using a query keys array, access the id inside the fetch function, and destructure the query key to use second index as the user id.

Learn how to use an object as query keys in React Query, destructure to extract the user id, and compare object-based keys with array keys through practical refactoring.

Master React Query key rules by using unique, consistent, and meaningful keys. Structure keys as arrays, serialize data, refactor as needed, and avoid dynamic or sensitive values.

Learn how query functions fetch and produce data for components by returning promises and handling asynchronous API calls, database fetches, and other tasks, with arguments supplied by the query key.

Learn the rules for query functions in react query: return a promise, throw errors, align the query key order, and resolve to actual data, not the response object, for components.

Learn to catch and handle errors in react query with fetch or axios, noting fetch does not reject on http errors and requires manual status checks.

Learn how to handle fetch errors by checking response.ok, throwing custom errors like user not found, and observe how React Query retries and surfaces error states.

Understand how Axios handles errors with React Query, throwing on non-200 responses and moving the query hook to the error state, while deciding when to use Axios for server-side errors.

Learn to handle errors with axios by leveraging its data property, see how it reports errors and 404 status, and customize messages like user not found using try and catch.

Explore how default values in React Query provide predefined settings when explicit values are not provided, and how to configure them at the global level or the per-query level.

Install and configure the React Query devtools to visualize queries and default values, using npm, then wrap your main entry with the devtools and set the initial open prop.

Explore the React Query Devtool to inspect queries, keys, and cached data, including fresh, fetching, and stale status, and learn to refresh, invalidate, and reset with cache time.

Explore stale time in React Query, how a zero default makes data stale after fetch, and how increasing it reduces unnecessary network requests when data does not change frequently.

Explore how to customize server state behavior in React Query by adjusting the global query client and per-query stale time, controlling when data becomes outdated and refetched.

Discover how React Query caches data and uses cache time to remove unused data, balancing memory use with data freshness, with a default of five minutes.

Configure cache time in React Query at component and global levels, showing how data becomes stale after five seconds and remains in cache as inactive for up to five minutes.

Enable refresh on mount to automatically update data when a component mounts, true or false to enable or disable. Configure defaults globally or per query.

Enable refresh on window focus to automatically update query data when the browser regains focus, ensuring up-to-date information without manual refreshes, with global or per-query customization.

Enable refresh on reconnect to fetch latest data when the network restores; default is true and can be configured globally or per useQuery, interacting with stale time.

Learn how the retry delay option in React Query (TanStack Query) manages backoff between failed server state queries, with defaults, customization, and trade-offs for backend load and user experience.

Set a refresh interval in milliseconds to automatically refresh queries in the background, globally or per query, keeping data fresh and avoiding stale data.

Explore how react query runs independent queries in parallel, fetching user data, product lists, and site settings, then renders after all data arrives with guidance on independence and load.

Demonstrate parallel queries in react query by fetching all users and an unknown user from two endpoints, handling loading and errors, and rendering results.

Explore how React Query uses paginated queries to fetch large data sets in pages, enabling navigation between pages, faster responses, and caching of previous pages.

Demonstrates implementing pagination in React Query with the Json placeholder API, using _page and _limit, a dynamic page state, and previous/next controls with loading handling.

Prefetching data in advance with the React Query prefetch query function speeds up perceived loading by making data ready when needed, while honoring cache and freshness rules.

Explore prefetching with TanStack Query in a pagination app, using useQueryClient and prefetchQuery to cache the next page for seamless navigation.

Use mutations to change data with post, put, or delete requests via useMutation, tracking idle, loading, success, and error states while separating mutation logic and invalidating queries to refresh data.

Learn how mutateAsync triggers mutations asynchronously with useMutation, returning a promise you can await to handle results or errors, while updating loading, success, and error states in the UI.

Demonstrates using the mutate async function for HTTP requests to create, delete, or update documents, with try/catch handling and redirect after submission.

Understand query invalidation in React Query and keep client data in sync after mutations. Use exact query keys and the useMutation onSuccess callback to refresh only what's needed.

Shows how to use TanStack Query to invalidate the post list after a successful mutation, refreshing all posts without a manual page refresh.