State Management · Junior · Question 56 of 75

Why define selector functions like `selectCartTotal(state)` instead of inline lookups everywhere?

✓Correct answer: Components don't depend on the state shape, logic lives in one place and selectors can be memoized
2Redux requires all selectors to be named
3Inline selectors don't work with useSelector

Explanation

When the state structure changes, only the selectors need updating. createSelector adds memoization for derived data.

Further reading

Redux: Deriving Data with Selectors ↗

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