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Two findings from review on #93, both verified before fixing. <img src> cannot vary by viewport, so it was always the wide desktop crop. A browser taking neither AVIF nor WebP therefore fell through to the desktop frame on a phone and lost the schoolhouse — the exact failure the two-crop <picture> exists to prevent, surviving in the one path nobody looks at. The band JPEG the build script already emitted was never referenced, which was the tell. It now backs a <source media> placed after the modern formats, so they still win wherever they are supported. Verified by stripping the AVIF and WebP <source>s at runtime and letting <picture> re-resolve, which is what an old browser actually sees: phone hero-band-500.avif → hero-band-700.jpg (band crop, school kept) desktop hero-wide-1672.avif → hero-wide-1200.jpg sharp was not declared: it arrives transitively from next@16.1.6, so the documented regeneration command works today and breaks on a Next upgrade or a clean install that resolves differently. Declared in devDependencies for the same reason next.config.js already declares its traced font files rather than trusting the tracer to keep finding them. The third finding — that the hero's licence is marked unconfirmed in CREDITS.md while the artwork ships — is accurate and deliberate. It is the owner's to answer; recording it as unknown is the point of the file. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
SchoolCompare Next.js Application
Modern Next.js application for comparing primary school KS2 performance across England.
Features
- Server-Side Rendering (SSR): Fast initial page loads with pre-rendered content
- Individual School Pages: Dedicated pages for each school with full SEO optimization
- Side-by-Side Comparison: Compare up to 5 schools simultaneously
- School Rankings: Top-performing schools by various metrics
- Interactive Maps: Leaflet integration for geographic visualization
- Performance Charts: Chart.js visualizations for historical data
- Responsive Design: Mobile-first approach with full responsive support
- SEO Optimized: Dynamic sitemaps, meta tags, and structured data
Tech Stack
- Framework: Next.js 16 (App Router)
- Language: TypeScript 5
- Styling: CSS Modules + CSS Variables
- State Management: React Context API + URL state
- Data Fetching: SWR (client-side) + Next.js fetch (server-side)
- Charts: Chart.js + react-chartjs-2
- Maps: Leaflet + react-leaflet
- Testing: Jest + React Testing Library
- Validation: Zod
Getting Started
Prerequisites
- Node.js 24+ (using nvm recommended)
- FastAPI backend running on port 8000
Installation
# Install dependencies
npm install
# Copy environment variables
cp .env.example .env.local
# Update .env.local with your configuration
Development
# Start development server
npm run dev
# Open http://localhost:3000
Building
# Build for production
npm run build
# Start production server
npm start
Testing
# Run tests
npm test
# Run tests in watch mode
npm run test:watch
# Run tests with coverage
npm run test:coverage
Linting
# Run ESLint
npm run lint
Project Structure
nextjs-app/
├── app/ # App Router pages
│ ├── layout.tsx # Root layout
│ ├── page.tsx # Home page
│ ├── compare/ # Compare page
│ ├── rankings/ # Rankings page
│ ├── school/[urn]/ # Individual school pages
│ ├── sitemap.ts # Dynamic sitemap
│ └── robots.ts # Robots.txt
├── components/ # React components
│ ├── SchoolCard.tsx # School card component
│ ├── FilterBar.tsx # Search/filter controls
│ ├── ComparisonView.tsx # Comparison interface
│ ├── RankingsView.tsx # Rankings table
│ └── ...
├── lib/ # Utility libraries
│ ├── api.ts # API client
│ ├── types.ts # TypeScript types
│ └── utils.ts # Helper functions
├── hooks/ # Custom React hooks
├── context/ # React Context providers
├── styles/ # Global styles
├── public/ # Static assets
└── __tests__/ # Test files
Environment Variables
| Variable | Description | Default |
|---|---|---|
NEXT_PUBLIC_API_URL |
Public API endpoint (client-side) | http://localhost:8000/api |
FASTAPI_URL |
Server-side API endpoint | http://localhost:8000/api |
NODE_ENV |
Environment mode | development |
Performance Optimizations
- Server-Side Rendering: Initial HTML rendered on server
- Static Generation: Where possible, pages are pre-generated
- Image Optimization: Next.js Image component with AVIF/WebP support
- Code Splitting: Automatic route-based code splitting
- Dynamic Imports: Heavy components loaded on demand
- API Caching: Configurable revalidation for data fetching
- Bundle Optimization: Tree shaking and minification
- Compression: Gzip compression enabled
SEO Features
- Dynamic Meta Tags: Generated per page with Next.js Metadata API
- Open Graph: Social media optimization
- JSON-LD: Structured data for search engines
- Sitemap: Auto-generated from database
- Robots.txt: Search engine crawling rules
- Canonical URLs: Duplicate content prevention
Browser Support
- Chrome (latest)
- Firefox (latest)
- Safari (latest)
- Edge (latest)
License
Proprietary - SchoolCompare
Support
For issues and questions, please contact the development team.