Learn
TypeScript and React Product Systems
Design React interfaces with typed state, resilient effects, accessible controls, and performance-aware layout.
Level: Intermediate. Track: Frontend systems. Audience: Frontend developers who want UI code that remains calm as product complexity grows.
Capstone: A responsive learning dashboard with typed workflows, optimistic progress, and screenshot-tested states.
Outcomes
- Represent UI and API states with clear TypeScript contracts.
- Build accessible flows that handle loading, errors, optimistic updates, and rollback.
- Keep layouts stable and test behavior through user-visible affordances.
Stack
- React
- TypeScript
- Vite
- Wouter
- Tailwind
Course sections
- Typed UI foundations — Make component contracts, remote data, and UI transitions explicit.
- Product quality loops — Harden layouts, server-state flows, forms, and tests for real product usage.
- Pro: operations and reliability — Connect accessibility, recovery, telemetry, screenshots, performance marks, and release checks.
Professional roadmap
- Typed data boundary — Parse external data once and pass trusted types through the component tree. Evidence: A fetcher or schema parser with tests for malformed responses.
- Flow model documented — Replace conflicting booleans with a state/event model. Evidence: Reducer tests or a transition table reviewed with the UI.
- Tested product flow — Verify a full form or dashboard interaction with accessible queries. Evidence: Passing behavior tests for success, failure, and retry paths.
- Release-ready product flow — Add accessible recovery, privacy-safe events, performance marks, mobile screenshots, and rollback notes. Evidence: Keyboard recovery proof, event contract, screenshot set, and release checklist.
Portfolio artifacts
- Typed React feature
- State transition notes
- Accessibility-minded tests
- Performance checklist
- Telemetry event contract
- Mobile release screenshot set
Lessons
- TypeScript Component Foundations — Use props, unions, and small component contracts to make UI states explicit before screens grow complex. 30 min.
- State Machines for UI Flow — Replace boolean soup with compact discriminated states that explain what the screen can do next. 35 min.
- Performance-Friendly Layout — Use stable dimensions, lazy boundaries, and predictable render paths to avoid layout shifts. 31 min.
- Server State, Forms, and Tests — Build a production form flow with typed API parsing, TanStack Query ownership, optimistic cache updates, rollback, accessible errors, and behavior-focused tests. 56 min.
- Accessibility and Error Recovery — Design UI flows that announce state changes, preserve focus, recover from failure, and stay usable on mobile. 42 min.
- Frontend Observability and Release Readiness — Instrument user-visible flows with safe events, performance marks, screenshots, and release checks before shipping. 48 min.
Canonical course URL