Modern-SvelteKit-Webshop Svelte Themes

Modern Sveltekit Webshop

๐Ÿ›’ Modern e-commerce webshop built with SvelteKit, featuring high performance, accessibility, and Stripe integration. Complete with 52 products, advanced search, dark mode, and production-ready deployment.

๐Ÿ›’ Modern SvelteKit E-Commerce Webshop

A production-ready, modern e-commerce platform built with cutting-edge web technologies

๐Ÿš€ Live Demo โ€ข ๐Ÿ“– Documentation โ€ข ๐Ÿ› ๏ธ API Reference


๐Ÿ“ธ Screenshots

๐Ÿ  Homepage

Homepage - Modern product showcase with featured items

Modern homepage with hero section, featured products, and category navigation

๐Ÿ›๏ธ Product Catalog

Product catalog with advanced filtering and search

Advanced product catalog with filtering, search, sorting, and pagination capabilities

๐Ÿ“ฆ Product Details

Product detail page with reviews and add to cart

Detailed product page with image gallery, customer reviews, ratings, and purchase options

๐Ÿ›’ Shopping Cart

Shopping cart with item management and checkout

Interactive shopping cart with quantity controls, price calculations, and secure checkout

๐ŸŒ™ Dark Mode Interface

Dark mode interface showcasing modern design

Beautiful dark mode interface with automatic theme switching and modern aesthetics

๐Ÿ“ฑ Mobile Responsive Design

Mobile responsive design optimized for smartphones

Fully responsive design optimized for mobile devices with touch-friendly interface

๐Ÿ‘ค User Profile

User profile page with account management

User profile page with account settings, order history, and personal information

๐Ÿ” Authentication

Login and registration interface

Secure authentication interface with login and registration forms

โš™๏ธ Admin Dashboard

Admin dashboard for product and order management

Comprehensive admin dashboard for managing products, orders, and customers

โŒจ๏ธ Keyboard Shortcuts

Keyboard shortcuts guide and interface

Keyboard shortcuts guide for enhanced accessibility and productivity

Featured products showcase on homepage

Featured products section highlighting popular and trending items


๐Ÿ“‹ Table of Contents


โœจ Features

๐Ÿ›๏ธ E-Commerce Core

  • 52 Premium Products with detailed descriptions and specifications
  • Advanced Product Filtering by category, price, availability, and features
  • Intelligent Search with real-time suggestions and highlighting
  • Persistent Shopping Cart with localStorage synchronization
  • Wishlist Management with heart-based UI interactions
  • Product Reviews & Ratings system
  • Order Tracking with real-time status updates

๐Ÿ’ณ Payment & Commerce

  • Stripe Integration with secure checkout flow
  • Webhook Handling for payment status updates
  • Coupon System with discount codes and promotions
  • Multi-currency Support (EUR, USD, CHF)
  • Order Management with invoice generation
  • Return & Refund processing system

๐ŸŽจ User Experience

  • Dark/Light Mode with automatic system preference detection
  • Fully Responsive Design optimized for mobile, tablet, and desktop
  • Accessibility Compliant (WCAG 2.1 AA standards)
  • Keyboard Navigation with comprehensive shortcuts
  • Progressive Web App (PWA) capabilities
  • Offline Support with service worker caching
  • Smooth Animations and micro-interactions

๐Ÿ”ง Developer Experience

  • TypeScript First with strict type checking
  • Hot Module Replacement for instant development feedback
  • Component Library with reusable, documented components
  • Comprehensive Testing suite with Vitest
  • Code Quality with ESLint and Prettier
  • GitHub Actions CI/CD pipeline
  • Automated Deployment to Vercel/Netlify

๐Ÿ“Š Analytics & Monitoring

  • Performance Monitoring with Core Web Vitals
  • Error Tracking with comprehensive logging
  • SEO Optimization with meta tags and structured data
  • Social Media Integration with Open Graph and Twitter Cards
  • Google Analytics ready integration

๐Ÿงฐ Tech Stack

Core Framework

๐ŸŽฏ SvelteKit 2.0+    # Full-stack framework with SSR/SSG
๐ŸŽฏ TypeScript 5.0+   # Type-safe development
๐ŸŽฏ Vite 5.0+        # Lightning-fast build tool

Frontend & Styling

๐ŸŽจ Tailwind CSS 3.3+  # Utility-first CSS framework
๐ŸŽจ Svelte 4.2+       # Reactive UI framework
๐ŸŽจ PostCSS 8.4+      # CSS processing

Backend & APIs

๐Ÿ”ง Node.js 20+       # Runtime environment
๐Ÿ”ง Stripe SDK       # Payment processing
๐Ÿ”ง Zod 3.22+        # Schema validation

Development & Quality

๐Ÿงช Vitest 1.0+       # Unit testing framework
๐Ÿงช Playwright       # E2E testing
๐Ÿงช ESLint 8.0+      # Code linting
๐Ÿงช Prettier 2.8+    # Code formatting

Deployment & Hosting

๐Ÿš€ Vercel           # Recommended hosting platform
๐Ÿš€ Netlify          # Alternative hosting
๐Ÿš€ Node.js Adapter  # Self-hosted option

๐Ÿš€ Quick Start

Prerequisites

Before you begin, ensure you have the following installed:

  • Node.js 20.0.0 or higher
  • npm 8.0.0 or higher (comes with Node.js)
  • Git for version control

Installation

  1. Clone the repository

    git clone https://github.com/michaelgermini/Modern-SvelteKit-Webshop.git
    cd modern-sveltekit-webshop
    
  2. Install dependencies

    npm install
    
  3. Environment setup

    cp env.example .env
    # Edit .env with your Stripe keys and configuration
    
  4. Start development server

    npm run dev
    
  5. Open your browser

    http://localhost:5173
    

Environment Configuration

Create a .env file in the root directory:

# Stripe Configuration
STRIPE_SECRET_KEY=sk_test_your_secret_key_here
PUBLIC_STRIPE_PK=pk_test_your_publishable_key_here

# Application Configuration
BASE_URL=http://localhost:5173
NODE_ENV=development

# Optional: Analytics, Email, etc.
GOOGLE_ANALYTICS_ID=your_ga_id
RESEND_API_KEY=your_resend_key

๐Ÿ“ Project Architecture

modern-sveltekit-webshop/
โ”œโ”€โ”€ ๐Ÿ“ src/
โ”‚   โ”œโ”€โ”€ ๐Ÿ“ lib/
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ components/          # 25+ Reusable UI Components
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›’ ProductCard.svelte
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›๏ธ ShoppingCart.svelte
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐ŸŽจ ThemeToggle.svelte
โ”‚   โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ” SearchBar.svelte
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ stores/              # Svelte State Management
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›’ cart.ts          # Shopping cart logic
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐ŸŒ™ theme.ts         # Dark/light mode
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ” auth.ts          # User authentication
โ”‚   โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ’ favorites.ts     # Wishlist management
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ services/            # Business Logic Layer
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›๏ธ products.ts      # Product management
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ’ณ stripe.ts        # Payment processing
โ”‚   โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ“ง email.ts         # Email notifications
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ utils/               # Utility Functions
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ’ฐ formatPrice.ts   # Currency formatting
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ” search.ts        # Search algorithms
โ”‚   โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ“Š analytics.ts     # Usage tracking
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ types/               # TypeScript Definitions
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›๏ธ product.ts       # Product interfaces
โ”‚   โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›’ cart.ts          # Cart types
โ”‚   โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ‘ค user.ts          # User management
โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ“ hooks/               # Custom Svelte Hooks
โ”‚   โ”‚       โ””โ”€โ”€ ๐ŸŽฃ useInfiniteScroll.ts
โ”‚   โ”œโ”€โ”€ ๐Ÿ“ routes/                  # SvelteKit Routes
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ  +page.svelte         # Homepage
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›๏ธ products/+page.svelte # Product catalog
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“ฆ product/[slug]/+page.svelte # Product details
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ›’ cart/+page.svelte    # Shopping cart
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ‘ค profile/+page.svelte # User profile
โ”‚   โ”‚   โ”œโ”€โ”€ ๐Ÿ“Š admin/               # Admin dashboard
โ”‚   โ”‚   โ””โ”€โ”€ ๐Ÿ”ง api/                 # Server endpoints
โ”‚   โ”‚       โ”œโ”€โ”€ ๐Ÿ’ณ checkout/+server.ts
โ”‚   โ”‚       โ””โ”€โ”€ ๐Ÿช webhook/+server.ts
โ”‚   โ”œโ”€โ”€ ๐Ÿ“„ app.html                # HTML template
โ”‚   โ”œโ”€โ”€ ๐ŸŽจ app.css                 # Global styles
โ”‚   โ””โ”€โ”€ ๐Ÿ”ง app.d.ts                # TypeScript declarations
โ”œโ”€โ”€ ๐Ÿ“ static/                     # Static Assets
โ”‚   โ”œโ”€โ”€ ๐Ÿ–ผ๏ธ img/products/           # Product images (25+ SVG)
โ”‚   โ”œโ”€โ”€ ๐ŸŽฏ favicon.ico             # Site favicon
โ”‚   โ”œโ”€โ”€ ๐Ÿ“ฑ manifest.json           # PWA manifest
โ”‚   โ”œโ”€โ”€ ๐Ÿค– robots.txt              # SEO robots
โ”‚   โ””โ”€โ”€ ๐Ÿ”ง sw.js                   # Service worker
โ”œโ”€โ”€ โš™๏ธ Configuration Files
โ”‚   โ”œโ”€โ”€ ๐Ÿ“ฆ package.json            # Dependencies & scripts
โ”‚   โ”œโ”€โ”€ ๐Ÿ› ๏ธ svelte.config.js        # SvelteKit config
โ”‚   โ”œโ”€โ”€ โšก vite.config.ts           # Build tool config
โ”‚   โ”œโ”€โ”€ ๐ŸŽจ tailwind.config.js      # Styling config
โ”‚   โ”œโ”€โ”€ ๐Ÿ” tsconfig.json           # TypeScript config
โ”‚   โ””โ”€โ”€ ๐Ÿงช vitest.config.ts        # Testing config
โ”œโ”€โ”€ ๐Ÿ“š Documentation
โ”‚   โ”œโ”€โ”€ ๐Ÿ“– README.md               # This file
โ”‚   โ”œโ”€โ”€ ๐Ÿค CONTRIBUTING.md         # Contribution guidelines
โ”‚   โ”œโ”€โ”€ ๐Ÿ”’ SECURITY.md             # Security policy
โ”‚   โ”œโ”€โ”€ ๐Ÿ“‹ USAGE_GUIDE.md          # Usage instructions
โ”‚   โ””โ”€โ”€ ๐Ÿ“„ LICENSE                 # MIT license
โ””โ”€โ”€ ๐Ÿ”ง Development Tools
    โ”œโ”€โ”€ ๐Ÿš€ .github/workflows/      # GitHub Actions CI/CD
    โ”œโ”€โ”€ ๐ŸŽฏ .gitignore              # Git ignore rules
    โ”œโ”€โ”€ ๐Ÿ”ง .eslintrc.cjs           # ESLint config
    โ””โ”€โ”€ ๐ŸŽจ .prettierrc             # Prettier config

Key Architecture Principles

๐Ÿ—๏ธ Separation of Concerns

  • Presentation Layer: Components handle UI rendering
  • Business Logic Layer: Services manage data operations
  • State Management Layer: Stores handle application state
  • API Layer: Server endpoints handle external integrations

๐Ÿ”„ Data Flow

User Interaction โ†’ Component โ†’ Store โ†’ Service โ†’ API โ†’ Database
                                      โ†“
                                 UI Updates โ† Store โ† Component

๐Ÿ“ฆ Component Architecture

  • Atomic Design: Components broken into atoms, molecules, organisms
  • Composition over Inheritance: Flexible component composition
  • Type-Safe Props: Full TypeScript support for all component props
  • Accessibility First: ARIA roles and keyboard navigation built-in

๐Ÿ›๏ธ Product Catalog

Our curated collection includes 52 premium products across multiple categories:

๐Ÿ’ป Technology & Gadgets

  • RGB Mechanical Keyboard (โ‚ฌ1,200) - Cherry MX switches, customizable lighting
  • Ergonomic Wireless Mouse (โ‚ฌ450) - Vertical design, 1000 DPI precision
  • Wireless Charging Pad (โ‚ฌ250) - Qi-compatible, LED indicators
  • Developer Headphones (โ‚ฌ1,800) - Noise-cancelling, built-in mic

๐Ÿ‘• Apparel & Accessories

  • Svelte T-shirt (โ‚ฌ25) - Organic cotton, reactive logo design
  • TypeScript Hoodie (โ‚ฌ55) - Ultra-soft, type system graphics
  • Developer Baseball Cap (โ‚ฌ18) - UV protection, adjustable fit
  • Coding Socks (โ‚ฌ12) - Algorithm patterns, comfortable fit

๐Ÿ  Smart Home & IoT

  • AI Smart Speaker (โ‚ฌ1,200) - Voice-controlled AI assistant
  • Smart Robot Vacuum (โ‚ฌ32,000) - AI-powered mapping
  • Smart Home Hub (โ‚ฌ890) - IoT platform integration

๐ŸŽฎ Gaming & VR

  • VR Development Kit (โ‚ฌ25,000) - Complete VR development suite
  • Gaming Accessories - Controllers, stands, and peripherals

Advanced Filtering System

  • Multi-Category Filtering: Technology, Apparel, Gaming, Eco, Exclusive
  • Price Range Selection: โ‚ฌ0 - โ‚ฌ35,000 with live updates
  • Availability Filter: In stock, out of stock options
  • Search Functionality: Real-time product search with highlighting
  • Sort Options: Price (low/high), Name (A-Z), Stock level

๐Ÿ’ณ Stripe Payment Integration

Secure Checkout Flow

Our Stripe integration provides enterprise-grade payment processing:

// Server-side checkout session creation
export async function POST({ request }) {
  const { items, successUrl, cancelUrl } = await request.json();

  const session = await stripe.checkout.sessions.create({
    payment_method_types: ['card'],
    line_items: items.map(item => ({
      price_data: {
        currency: 'eur',
        product_data: { name: item.name },
        unit_amount: item.price,
      },
      quantity: item.quantity,
    })),
    mode: 'payment',
    success_url: successUrl,
    cancel_url: cancelUrl,
  });

  return json({ sessionId: session.id });
}

Webhook Handling

Secure webhook processing for payment confirmations:

export async function POST({ request }) {
  const signature = request.headers.get('stripe-signature');
  const body = await request.text();

  try {
    const event = stripe.webhooks.constructEvent(
      body,
      signature,
      process.env.STRIPE_WEBHOOK_SECRET
    );

    switch (event.type) {
      case 'checkout.session.completed':
        // Handle successful payment
        await handlePaymentSuccess(event.data.object);
        break;
      case 'payment_intent.payment_failed':
        // Handle payment failure
        await handlePaymentFailure(event.data.object);
        break;
    }

    return json({ received: true });
  } catch (err) {
    throw error(400, 'Webhook signature verification failed');
  }
}

Payment Features

  • โœ… Multi-currency Support (EUR, USD, CHF)
  • โœ… Secure Card Processing with PCI compliance
  • โœ… Webhook Integration for real-time updates
  • โœ… Order Confirmation with email receipts
  • โœ… Refund Processing via Stripe dashboard
  • โœ… Test Mode for development and staging

๐ŸŽจ UI/UX Features

Dark/Light Mode Implementation

Automatic theme switching with system preference detection:

// Theme store with automatic detection
function getSystemTheme(): 'light' | 'dark' {
  return window.matchMedia('(prefers-color-scheme: dark)').matches
    ? 'dark'
    : 'light';
}

// Apply theme to document
function setThemeClass(theme: 'light' | 'dark') {
  document.documentElement.classList.remove('light', 'dark');
  document.documentElement.classList.add(theme);
}

Responsive Design System

Mobile-first approach with comprehensive breakpoints:

/* Responsive grid system */
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 768px) {
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

Accessibility Features

WCAG 2.1 AA compliant implementation:

  • Keyboard Navigation: Full keyboard support with visible focus indicators
  • Screen Reader Support: ARIA labels and semantic HTML structure
  • Color Contrast: Minimum 4.5:1 contrast ratio for text
  • Focus Management: Logical tab order and focus trapping in modals
  • Alternative Text: Descriptive alt text for all images

Progressive Web App (PWA)

Service worker implementation for offline functionality:

// Service worker registration
if ('serviceWorker' in navigator) {
  navigator.serviceWorker.register('/sw.js')
    .then(registration => {
      console.log('SW registered:', registration.scope);
    })
    .catch(error => {
      console.log('SW registration failed:', error);
    });
}

๐Ÿ”ง Development

Available Scripts

# Development
npm run dev          # Start development server with HMR
npm run build        # Create production build
npm run preview      # Preview production build locally

# Quality & Testing
npm run check        # TypeScript type checking
npm run lint         # ESLint code linting
npm run format       # Prettier code formatting
npm run test         # Run unit tests with Vitest
npm run test:ui      # Run tests with UI interface

# Advanced Testing
npm run test:coverage    # Generate test coverage report
npm run test:e2e         # Run end-to-end tests
npm run test:performance # Performance testing suite

Development Workflow

  1. Clone the repository

    git clone https://github.com/michaelgermini/Modern-SvelteKit-Webshop.git
    cd modern-sveltekit-webshop
    
  2. Install dependencies

    npm install
    
  3. Configure environment

    cp env.example .env
    # Edit .env with your Stripe keys and configuration
    
  4. Start development server

    npm run dev
    
  5. Run quality checks

    npm run lint
    npm run check
    npm run test
    

Code Quality Standards

  • TypeScript: Strict type checking enabled
  • ESLint: Airbnb configuration with Svelte support
  • Prettier: Consistent code formatting
  • Husky: Pre-commit hooks for quality assurance
  • CommitLint: Conventional commit message enforcement

๐Ÿ“Š Testing

Testing Strategy

Our comprehensive testing suite ensures code quality and reliability:

Unit Tests

// Example: Product service testing
import { describe, it, expect } from 'vitest';
import { formatPrice } from '$lib/utils/formatPrice';

describe('formatPrice', () => {
  it('should format EUR currency correctly', () => {
    expect(formatPrice(2500, 'EUR')).toBe('โ‚ฌ25.00');
  });

  it('should handle zero values', () => {
    expect(formatPrice(0, 'USD')).toBe('$0.00');
  });
});

Component Testing

// Example: Component testing with Testing Library
import { render, screen, fireEvent } from '@testing-library/svelte';
import ProductCard from '$lib/components/ProductCard.svelte';

describe('ProductCard', () => {
  it('should display product information', () => {
    const product = { name: 'Test Product', price: 1000 };
    render(ProductCard, { props: { product } });

    expect(screen.getByText('Test Product')).toBeInTheDocument();
    expect(screen.getByText('โ‚ฌ10.00')).toBeInTheDocument();
  });
});

E2E Testing

// Example: Playwright E2E test
import { test, expect } from '@playwright/test';

test('complete checkout flow', async ({ page }) => {
  await page.goto('/');
  await page.click('[data-testid="add-to-cart"]');
  await page.click('[data-testid="checkout-button"]');

  // Verify Stripe checkout loads
  await expect(page).toHaveURL(/checkout.stripe.com/);
});

Test Coverage

  • Unit Tests: Business logic and utilities
  • Component Tests: UI components and interactions
  • Integration Tests: API endpoints and data flow
  • E2E Tests: Complete user journeys
  • Performance Tests: Core Web Vitals and loading times

Running Tests

# Run all tests
npm run test

# Run with coverage
npm run test:coverage

# Run E2E tests
npm run test:e2e

# Run performance tests
npm run test:performance

# Watch mode for development
npm run test:watch

๐Ÿš€ Deployment

  1. Connect your repository

    npm install -g vercel
    vercel login
    vercel link
    
  2. Configure environment variables

    vercel env add STRIPE_SECRET_KEY
    vercel env add PUBLIC_STRIPE_PK
    
  3. Deploy

    vercel --prod
    

Netlify

  1. Connect via Git

    • Go to Netlify
    • Connect your GitHub repository
    • Set build command: npm run build
    • Set publish directory: build
  2. Environment variables

    • Add STRIPE_SECRET_KEY and PUBLIC_STRIPE_PK
    • Configure build settings

Manual Node.js Deployment

# Build for production
npm run build

# Start production server
npm run preview

# Or use PM2 for process management
npm install -g pm2
pm2 start "npm run preview" --name "webshop"

Environment Variables for Production

# Required
STRIPE_SECRET_KEY=sk_live_your_live_secret_key
PUBLIC_STRIPE_PK=pk_live_your_live_publishable_key

# Optional
NODE_ENV=production
BASE_URL=https://yourdomain.com
GOOGLE_ANALYTICS_ID=GA_MEASUREMENT_ID

๐Ÿ”’ Security

Security Best Practices

Our application implements enterprise-grade security measures:

Environment Security

# Never commit these files
.env
.env.local
.env.production

Data Validation

// Zod schema validation
import { z } from 'zod';

const checkoutSchema = z.object({
  items: z.array(z.object({
    productId: z.string(),
    quantity: z.number().min(1).max(99),
    price: z.number().positive()
  })),
  customerEmail: z.string().email()
});

export async function POST({ request }) {
  const body = await request.json();
  const validatedData = checkoutSchema.parse(body);
  // Proceed with validated data
}

Content Security Policy

// SvelteKit CSP configuration
export async function handle({ event, resolve }) {
  const response = await resolve(event);

  response.headers.set(
    'Content-Security-Policy',
    "default-src 'self'; " +
    "script-src 'self' 'unsafe-inline'; " +
    "style-src 'self' 'unsafe-inline'; " +
    "img-src 'self' data: https:; " +
    "connect-src 'self' https://api.stripe.com"
  );

  return response;
}

Authentication & Authorization

  • Secure session management
  • Input sanitization
  • SQL injection prevention
  • XSS protection
  • CSRF protection

Security Checklist

  • โœ… HTTPS enforcement
  • โœ… Secure headers (HSTS, CSP, X-Frame-Options)
  • โœ… Input validation with Zod schemas
  • โœ… Rate limiting on API endpoints
  • โœ… Error handling without information leakage
  • โœ… Dependency scanning with npm audit

๐Ÿ“ˆ Performance

Core Web Vitals Optimization

Lighthouse Scores Target

  • Performance: >90
  • Accessibility: >95
  • Best Practices: >95
  • SEO: >95

Optimization Techniques

Image Optimization
// Lazy loading with intersection observer
import { onMount } from 'svelte';

let imgElement: HTMLImageElement;
let isIntersecting = false;

onMount(() => {
  const observer = new IntersectionObserver(
    (entries) => {
      entries.forEach(entry => {
        if (entry.isIntersecting) {
          isIntersecting = true;
          observer.disconnect();
        }
      });
    }
  );

  if (imgElement) observer.observe(imgElement);
});
Code Splitting
// Dynamic imports for route-based splitting
import { onMount } from 'svelte';

let Component: any;

onMount(async () => {
  const module = await import('./HeavyComponent.svelte');
  Component = module.default;
});
Bundle Analysis
# Analyze bundle size
npm run build
npx vite-bundle-analyzer dist/

Performance Monitoring

Real User Monitoring (RUM)

// Core Web Vitals tracking
import { onMount } from 'svelte';

onMount(() => {
  // CLS (Cumulative Layout Shift)
  new PerformanceObserver((list) => {
    for (const entry of list.getEntries()) {
      console.log('CLS:', entry.value);
    }
  }).observe({ entryTypes: ['layout-shift'] });

  // FID (First Input Delay)
  new PerformanceObserver((list) => {
    for (const entry of list.getEntries()) {
      console.log('FID:', entry.processingStart - entry.startTime);
    }
  }).observe({ entryTypes: ['first-input'] });
});

๐Ÿค Contributing

Development Workflow

  1. Fork the repository on GitHub

  2. Clone your fork locally

    git clone https://github.com/yourusername/Modern-SvelteKit-Webshop.git
    cd modern-sveltekit-webshop
    
  3. Create a feature branch

    git checkout -b feature/amazing-feature
    
  4. Make your changes following our guidelines

  5. Run tests and quality checks

    npm run lint
    npm run check
    npm run test
    
  6. Commit your changes

    git commit -m "feat: add amazing feature
    
    - Detailed description of changes
    - Reference to issues if applicable
    - Breaking changes noted"
    
  7. Push and create Pull Request

    git push origin feature/amazing-feature
    

Code Standards

TypeScript Guidelines

  • Use strict type checking
  • Prefer interfaces over types for object shapes
  • Use union types for related values
  • Avoid any type except when necessary

Component Structure

<script lang="ts">
  // Imports first
  import { createEventDispatcher } from 'svelte';

  // Types and interfaces
  type Product = {
    id: string;
    name: string;
    price: number;
  };

  // Props with proper typing
  export let product: Product;
  export let disabled = false;

  // Reactive statements
  $: isAvailable = product.stock > 0;

  // Event dispatchers
  const dispatch = createEventDispatcher<{
    addToCart: { product: Product; quantity: number }
  }>();

  function handleAddToCart() {
    dispatch('addToCart', { product, quantity: 1 });
  }
</script>

<!-- Template with semantic HTML -->
<button
  {disabled}
  on:click={handleAddToCart}
  class="btn-primary"
  aria-label="Add {product.name} to cart"
>
  Add to Cart
</button>

Commit Message Convention

type(scope): description

[optional body]

[optional footer]

Types:

  • feat: new feature
  • fix: bug fix
  • docs: documentation
  • style: formatting
  • refactor: code restructuring
  • test: adding tests
  • chore: maintenance

๐Ÿ“„ License

MIT License

Copyright (c) 2024 Modern SvelteKit Webshop

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

๐Ÿ“ž Support & Community

Getting Help

Reporting Security Issues

Please report security vulnerabilities by emailing security@germini.info instead of using public issues.


๐Ÿ™ Acknowledgments

  • Svelte Team for the amazing framework
  • Stripe for secure payment processing
  • Tailwind CSS for the utility-first approach
  • Vercel for hosting and deployment
  • Open source community for inspiration and tools

๐ŸŽ‰ Thank you for choosing Modern SvelteKit Webshop!

Built with โค๏ธ using modern web technologies

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