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useState basics, correct updates, functional updates, and common mistakes

useState stores local component state, and updates should be based on immutable patterns and previous state when needed.

React Easy Theory

useState basics, correct updates, functional updates, and common mistakes

useState stores local component state, and updates should be based on immutable patterns and previous state when needed.

  • Use functional updates when next state depends on previous state
  • Never mutate arrays or objects directly
  • Setter calls schedule a re-render
#hooks #react #useState

useState basics, correct updates, functional updates, and common mistakes