How should I organize Redux slices?
By feature, not by file type. A cart slice holds all cart state and logic. This keeps related code together and easy to find as the app grows, instead of scattering actions, types, and reducers across many files.
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More FAQs in Redux Toolkit Best Practices for Scalable React Apps
Select only the specific data a component needs, not a whole slice. If you select a large object when you need one field, the component re-renders whenever any part changes. Be specific in your selectors.
Use createAsyncThunk for data fetching and other async logic, and manage pending, fulfilled, and rejected cases in extraReducers. Do not hand-roll async in reducers, which must stay pure.
A data-fetching solution built into Redux Toolkit that handles caching, invalidation, and loading states for you. For API data, it removes most hand-written data-fetching code and is worth considering.
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