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Redux Toolkit · Hook

useAppSelector

A Redux selector is a function that reads the needed value from store state. Reusable selectors keep lookup logic in slice files and can accept extra arguments such as an item ID.

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Syntax

const selectPostById = (state: RootState, postId: string) => state.posts.find(post => post.id === postId)

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  • useAppSelector
  • RootState
  • createSlice
  • createSelector
  • selectAllPosts
  • selectPostById

Source: Redux Essentials, Part 4: Using Redux Data. Checked 2026-11-03.