🎯 Learning Objectives
After completing this course, you will be able to:
- Master modern frontend development workflows
- Build responsive, accessible web applications
- Implement state management patterns
- Optimize frontend performance
- Write maintainable, testable code
- Deploy and monitor frontend applications
- Follow frontend best practices
⚡ Prerequisites
- HTML & CSS Course completed
- JavaScript fundamentals
- Responsive Design knowledge
- Basic Git/GitHub
- Command line basics
1. Modern Frontend Stack
The Modern Frontend Ecosystem
Modern frontend development involves a rich ecosystem of tools, frameworks, and best practices that enable building scalable, maintainable applications.
Core Technologies
- HTML5: Semantic markup
- CSS3: Modern styling (Grid, Flexbox)
- JavaScript (ES6+): Modern syntax
- TypeScript: Type safety
Build Tools
- Vite: Fast build tool
- Webpack: Module bundler
- Babel: JavaScript compiler
- PostCSS: CSS processor
Frameworks
- React: Component-based UI
- Vue: Progressive framework
- Angular: Full-featured framework
- Svelte: Compiled framework
Package Management
- npm: Node package manager
- yarn: Fast package manager
- pnpm: Efficient package manager
2. Application Architecture
⚠️ Best Practices
- Keep components small and focused
- Separate business logic from UI
- Use TypeScript for type safety
- Follow consistent naming conventions
- Implement proper error boundaries
3. State Management
State Management Options
- Local State: useState, useReducer
- Context API: Global state
- Redux: Predictable state container
- Zustand: Lightweight state management
- Jotai: Atomic state management
When to Use What
- Local State: Component-specific data
- Context: Theme, auth, small apps
- Redux: Complex apps, time travel
- Zustand/Jotai: Simple global state
🔴 Performance Metrics
- FCP: First Contentful Paint (under 1.8s)
- LCP: Largest Contentful Paint (under 2.5s)
- FID: First Input Delay (under 100ms)
- CLS: Cumulative Layout Shift (under 0.1)
- TTI: Time to Interactive (under 3.8s)
Optimization Techniques
- Code splitting and lazy loading
- Image optimization (WebP, lazy loading)
- Memoization (useMemo, useCallback)
- Virtual scrolling for long lists
- Debouncing and throttling
- Service workers and caching
Bundle Optimization
- Tree shaking
- Minification
- Compression (gzip, brotli)
- CDN usage
- Remove unused dependencies
- Analyze bundle size
5. Testing Strategies
Testing Pyramid
- Unit Tests: Individual functions/components
- Integration Tests: Component interactions
- E2E Tests: Full user flows
Testing Tools
- Vitest: Fast unit testing
- React Testing Library: Component testing
- Cypress: E2E testing
- Playwright: Cross-browser testing
6. Accessibility (a11y)
🔴 WCAG Guidelines
Follow Web Content Accessibility Guidelines (WCAG) 2.1 Level AA standards:
- Perceivable: Information must be presentable to users
- Operable: UI components must be operable
- Understandable: Information must be understandable
- Robust: Content must work with assistive technologies
Key Practices
- Semantic HTML elements
- ARIA labels and roles
- Keyboard navigation
- Focus management
- Color contrast (4.5:1 minimum)
- Alt text for images
- Form labels and error messages
Testing Tools
- axe DevTools: Browser extension
- WAVE: Web accessibility evaluator
- Lighthouse: Automated audits
- Screen readers: NVDA, JAWS, VoiceOver
7. Deployment & CI/CD
Deployment Platforms
- Vercel: Zero-config deployments
- Netlify: JAMstack hosting
- AWS S3 + CloudFront: Scalable hosting
- GitHub Pages: Free static hosting
- Azure Static Web Apps: Microsoft cloud
CI/CD Pipeline
- Automated testing
- Code linting
- Build optimization
- Preview deployments
- Production deployment
- Rollback capability
Environment Variables
Always use environment variables for sensitive data and configuration:
- API endpoints
- API keys (never commit to git)
- Feature flags
- Analytics IDs
Practice Exercises
Create a comprehensive dashboard application:
- Setup with Vite + React + TypeScript
- Implement authentication flow
- Create reusable component library
- Add data visualization (charts)
- Implement responsive design
- Add dark mode toggle
- Write unit tests for components
Optimize an existing application:
- Analyze bundle size and reduce it by 30%
- Implement code splitting for routes
- Add lazy loading for images
- Optimize re-renders with memoization
- Achieve Lighthouse score above 90
- Implement service worker for caching
Make an application fully accessible:
- Add proper ARIA labels
- Implement keyboard navigation
- Ensure color contrast compliance
- Add skip navigation links
- Test with screen readers
- Fix all axe DevTools issues
🎉 Summary
You've completed the Frontend Development Mastery course! You now know:
- Modern frontend development stack and tools
- Component architecture and design patterns
- State management strategies
- Performance optimization techniques
- Testing methodologies and tools
- Accessibility standards and implementation
- Deployment and CI/CD workflows
Total points available: 10/10