RTK Query takes inspiration from other tools that have pioneered solutions for data fetching, like Apollo Client, React Query, Urql, and SWR, but adds a unique approach to its API design: While you can use a state management library like Redux to cache data, the use cases are different enough that it's worth using tools that are purpose-built for the data fetching use case. Over the last couple years, the React community has come to realize that "data fetching and caching" is really a different set of concerns than "state management". However, users still have to write significant amounts of reducer logic to manage the loading state and the cached data. The Redux docs have taught some common patterns for dispatching actions around the request lifecycle to track loading state and request results, and Redux Toolkit's createAsyncThunk API was designed to abstract that typical pattern. That means that Redux has never included anything built in to help solve these use cases. The Redux core has always been very minimal - it's up to developers to write all the actual logic.
Web applications normally need to fetch data from a server in order to display it.
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See the RTK Query usage guides and API reference docs for complete information on how to use RTK Query: RTK Query is an optional addon included in the Redux Toolkit package, and its functionality is built on top of the other APIs in Redux Toolkit. It is designed to simplify common cases for loading data in a web application, eliminating the need to hand-write data fetching & caching logic yourself. RTK Query is a powerful data fetching and caching tool. If you see this issue, you may need to uninstall and reinstall react-redux with the latest version, to help ensure no redux duplicates are in the package tree. The problems appeared to be caused by multiple versions of the redux package ending up in a project's node_modules folder. Npm i add Note: During the alphas, we received some reports of users seeing incorrect types after installing the RTK 1.6 previews.
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