Here's how I built this contacts manager app, from initial concept to final implementation:
1.Architected TypeScript interface for Contact objects with firstName, lastName, email, phone, address, and company properties, implementing comprehensive data validation
2.Built CRUD system using React state management with functional updates, implementing optimistic UI updates and proper state synchronization across components
3.Developed advanced search system using Array.filter() with multiple search criteria, implementing real-time filtering by name, email, phone, and company fields
4.Created comprehensive form validation with email regex patterns, phone number formatting, and required field validation with real-time error feedback
5.Implemented localStorage persistence with JSON serialization, handling complex object serialization and proper data integrity with error handling
6.Built responsive design using CSS Grid and Flexbox, implementing mobile-first approach with touch-optimized interactions and accessibility compliance