⚛️ ReactJS Pro: Elevate Your Frontend Engineering Mastery – Series 1

### 1. Coding Challenge: Build a Dynamic Form with Validation & Reusability (25 mins)

Objective: Implement a dynamic form component in React that accepts JSON schema and renders inputs with built-in validation.
Key Concepts:

• Controlled components and form state
• Reusable components with props and context
• Validation (custom + libraries like Yup)

Discussion Points:

• Schema-driven UI design
• Managing deeply nested form data
• Performance with large forms (memoization, virtualization)

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### 2. Debugging Simulation: Resolving React Memory Leaks (25 mins)

Scenario: A React dashboard gradually slows down and crashes after prolonged use.
Tasks:

• Identify and fix memory leaks from event listeners, intervals, or subscriptions
• Apply cleanup with `useEffect` and test with Chrome DevTools

Key Concepts:

• React lifecycle (`useEffect`, cleanup, unmount)
• Debugging with React DevTools + Profiler
• Preventing zombie subscriptions and stale state

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### 3. System Design Session: Designing a Component Library for an Enterprise App (35 mins)

Objective: Architect a scalable and themeable component library with Storybook integration.
Discussion Points:

• Atomic design principles
• Style systems (Tailwind vs Styled Components)
• Component composition and accessibility

Key Concepts:

• `React.forwardRef`, `useImperativeHandle`
• Design tokens and theme context
• Publishing as NPM package

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### 4. Real-World Product Issue: Handling Global Error Boundaries & Logging (25 mins)

Scenario: In production, certain user flows result in blank screens with no feedback.
Tasks:

• Implement a global error boundary that logs to an external service
• Display fallback UIs with user-friendly messaging

Key Concepts:

• `componentDidCatch` vs `useErrorBoundary`
• Integration with Sentry, LogRocket, or custom loggers
• Ensuring observability in SPAs

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### 5. Q&A and React Roundtable (30 mins)

Open forum:

• Discuss real-world challenges like hydration errors, performance bottlenecks, or state explosion
• Interview insights for React engineers (2–6 YOE)
• Live review of participant projects or portfolio advice

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> ✅ Bonus Add-on for Recruiter/Team Use:
> Series 2 – "ReactJS Pro Advanced":

• React + GraphQL integration
• State machine with XState
• Lazy loading, code splitting, SSR & hydration
• Testing React apps with Cypress + Jest

Join Zoom Meeting

https://us02web.zoom.us/j/82509450624?pwd=kFu5LRz4qbDgNlmRH6bFQgmmX7jMMZ.1

Meeting ID: 825 0945 0624
Passcode: 130608