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🎨 Frontend Development

This section covers the SvelteKit frontend architecture, components, and development patterns.

📖 Overview

LibreFolio's frontend is built with:

  • SvelteKit 2.x - Full-stack web framework
  • Svelte 5 - Reactive UI framework using Runes ($state, $derived, $effect)
  • Tailwind CSS 4.x - Utility-first CSS (configured via @theme in CSS)
  • TypeScript - Type safety
  • lucide-svelte - Icon library

📂 Directory Structure

frontend/src/
├── routes/           # SvelteKit pages and routing
│   ├── (app)/        # Authenticated app routes (Dashboard, Brokers, etc.)
│   │   ├── dashboard/
│   │   ├── brokers/
│   │   │   └── [id]/    # Broker detail page
│   │   ├── assets/
│   │   ├── transactions/
│   │   ├── fx/
│   │   ├── files/
│   │   └── settings/
│   └── +page.svelte  # Login page (Public)
├── lib/
│   ├── api/          # API client (Zodios, generated from OpenAPI)
│   ├── components/   # Reusable components
│   │   ├── auth/     # LoginCard, RegisterCard, ForgotPasswordCard
│   │   ├── brokers/  # Broker cards, forms, icon, import
│   │   ├── files/    # FilesTable with DataTable
│   │   ├── layout/   # Sidebar, Header, LanguageSelector
│   │   ├── settings/ # Settings tabs (Profile, Preferences, Global, About)
│   │   ├── table/    # DataTable suite (ModalBase, ConfirmModal, etc.)
│   │   └── ui/       # Generic UI atoms
│   │       ├── input/    # PasswordInput, PasswordStrength
│   │       ├── media/    # ImageCropper, ImageEditModal, AssetPickerModal, FileEditModal
│   │       └── select/   # BaseDropdown, SimpleSelect, SearchSelect
│   ├── i18n/         # Internationalization (EN, IT, FR, ES)
│   ├── stores/       # Global state (Auth, Settings, Language)
│   ├── types/        # TypeScript type definitions
│   └── utils/        # Utilities (imageCrop, upload, urlFilters)
├── e2e/              # Playwright E2E tests (7 suites, 109+ tests)
└── static/           # Static assets

⚡ Svelte 5 Runes

LibreFolio fully embraces Svelte 5's Runes for reactivity, replacing the legacy let and $ syntax.

🔑 Key Runes Used

  • $state: Declares reactive state. 
    let count = $state(0);
  • $derived: Declares derived state (automatically updates when dependencies change). 
    let double = $derived(count * 2);
  • $effect: Side effects (runs when dependencies change). 
    $effect(() => {
    console.log(count);
});
  • $props: Declares component props. 
    let { title, active = false } = $props();

📚 Documentation Sections

🏗️ Build & Development

Frontend tasks are managed via dev.py front:

# Start Vite dev server with Hot Module Replacement
./dev.py front dev

# Build for production (output in frontend/build/)
./dev.py front build

# Build with source maps for debugging
./dev.py front build --debug

# Type-check with svelte-check
./dev.py front check

# Preview production build locally
./dev.py front preview
Command Description
front dev Starts Vite at localhost:5173, proxies API calls to backend
front build Production build with minification and tree-shaking
front build --debug Build with source maps (useful for debugging deployed code)
front check Runs svelte-check for TypeScript and Svelte diagnostics
front preview Serves the production build locally for testing

Development workflow

Run ./dev.py server in one terminal and ./dev.py front dev in another. The Vite dev server proxies /api calls to the backend automatically.

Topic Description
DataTable Advanced table with sorting, filtering, pagination
FX Chain Algorithm DFS + graphology for multi-step FX routes
Authentication LoginCard, RegisterCard, ForgotPasswordCard
Settings User preferences, profile, and global settings
File Upload File uploader, image crop, asset picker