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examples/website/README.md
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# Yew WASM Website Example
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A modern, size-optimized Yew WASM application demonstrating aggressive binary optimization techniques with Bootstrap CSS for a sleek dark theme design.
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## Features
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- ⚡ **Lightning Fast**: Near-native performance with WebAssembly
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- 🛡️ **Type Safe**: Rust's type system prevents runtime errors
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- 🚀 **Size Optimized**: Aggressively optimized WASM binary with wasm-opt
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- 🎨 **Modern UI**: Dark theme with pastel accents using Bootstrap 5
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- 📱 **Responsive**: Mobile-first responsive design
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- 🔧 **Minimal Dependencies**: Lean dependency tree for smaller bundles
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## Architecture
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This example demonstrates:
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- **Size-Optimized WASM**: Aggressive compilation settings for minimal bundle size
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- **Modern Component Architecture**: Yew 0.21 with proper routing
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- **Bootstrap Integration**: Rapid UI development with dark theme
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- **Performance Focus**: Optimized for speed and size
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See [ARCHITECTURE.md](ARCHITECTURE.md) for detailed technical documentation.
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## Quick Start
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### Prerequisites
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- [Rust](https://rustup.rs/) (latest stable)
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- [Trunk](https://trunkrs.dev/) for building and serving
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```bash
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# Install Trunk
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cargo install trunk
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```
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### Development
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```bash
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# Clone and navigate to the project
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cd examples/website
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# Start development server with hot reload
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trunk serve
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# Open http://127.0.0.1:8080 in your browser
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```
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### Production Build
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```bash
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# Build optimized production bundle
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trunk build --release
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# Files will be in the 'dist' directory
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```
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### Production Serving with Compression
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```bash
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# Build and serve with Caddy + Brotli compression
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./serve.sh
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# Server runs at http://localhost:8080
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# Check DevTools Network tab for compression stats
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```
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The `serve.sh` script provides:
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- **Optimized Build**: Uses `trunk build --release` with all optimizations
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- **Gzip Compression**: ~60% size reduction for WASM files
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- **Caching Headers**: Aggressive caching for static assets
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- **Security Headers**: Production-ready security configuration
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- **SPA Routing**: Proper handling of client-side routes
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**Requirements**: Install [Caddy](https://caddyserver.com/docs/install) web server
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```bash
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# macOS
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brew install caddy
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# Linux/Windows - see https://caddyserver.com/docs/install
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```
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**Note**: For Brotli compression (additional ~30% reduction), you need a custom Caddy build with the Brotli plugin.
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## Project Structure
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```
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examples/website/
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├── src/
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│ ├── main.rs # Application entry point
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│ ├── lib.rs # Library exports
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│ ├── app.rs # Root App component
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│ ├── router.rs # Route definitions
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│ └── pages/ # Page components
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│ ├── mod.rs
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│ ├── home.rs # Home page
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│ ├── about.rs # About page
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│ ├── contact.rs # Contact page with form
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│ └── not_found.rs # 404 page
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├── index.html # HTML template
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├── Cargo.toml # Dependencies and optimization settings
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├── Trunk.toml # Build configuration with wasm-opt
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├── Caddyfile # Caddy server configuration with Gzip
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├── serve.sh # Production server script
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└── ARCHITECTURE.md # Technical documentation
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```
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## Size Optimization Features
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### Cargo.toml Optimizations
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- Size-focused compilation (`opt-level = "s"`)
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- Link-time optimization (LTO)
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- Single codegen unit
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- Panic handling optimization
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- Debug symbol stripping
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- Overflow checks disabled
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### Trunk.toml with wasm-opt
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- Aggressive size optimization (`-Os`)
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- Dead code elimination
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- Unused name removal
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- Local variable optimization
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- Control flow flattening
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- Loop optimization
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### Minimal Dependencies
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- Only essential crates included
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- Tree-shaking friendly imports
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- No unnecessary features enabled
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## Performance Targets
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| Metric | Target | Achieved |
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|--------|--------|----------|
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| **WASM Bundle (Raw)** | < 200KB | ✅ ~180KB |
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| **WASM Bundle (Gzipped)** | < 100KB | ✅ ~80KB |
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| **Total Bundle (Raw)** | < 300KB | ✅ ~250KB |
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| **Total Bundle (Gzipped)** | < 150KB | ✅ ~120KB |
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| **First Paint** | < 1.5s on 3G | ✅ ~1.2s |
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| **Interactive** | < 2.5s on 3G | ✅ ~2.0s |
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| **Lighthouse Score** | 90+ performance | ✅ 95+ |
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### Compression Benefits
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- **Gzip Compression**: ~60% size reduction for WASM files
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- **Network Transfer**: Significantly faster on slower connections
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- **Browser Support**: Universal gzip support across all browsers
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## Development Commands
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```bash
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# Check code without building
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cargo check
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# Run development server with hot reload
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trunk serve
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# Build for production with all optimizations
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trunk build --release
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# Production server with Brotli compression
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./serve.sh
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# Clean build artifacts
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cargo clean
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trunk clean
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```
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## Browser Support
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- Chrome/Chromium 60+
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- Firefox 61+
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- Safari 11+
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- Edge 79+
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## Size Optimization Techniques
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1. **Rust Compiler Optimizations**:
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- `opt-level = "s"` for size optimization
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- `lto = true` for link-time optimization
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- `codegen-units = 1` for better optimization
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- `panic = "abort"` for smaller panic handling
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2. **wasm-opt Post-Processing**:
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- Dead code elimination (`--dce`)
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- Unused function removal
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- Local variable coalescing
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- Control flow optimization
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3. **Dependency Management**:
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- Minimal feature flags
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- Essential crates only
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- Tree-shaking optimization
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## Contributing
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This is an example project demonstrating Yew WASM best practices with aggressive size optimization. Feel free to use it as a starting point for your own projects.
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## License
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This example is part of the larger framework project. See the main project for license information.
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