final-form-calculate

final-form-calculate is an open-source decorator for Final Form that automatically computes the value of one field based on changes to other fields, eliminating the need for manual state management. It is designed for developers using Final Form who need dynamic, reactive field calculations—such as totals, discounts, or derived data—without writing custom subscription logic. Its interest lies in simplifying complex form interactions while maintaining the declarative, subscription-based performance of Final Form.