Full stack swap to enable future extension (more pages / load functions /
backend) while keeping JSDoc-only code style.
Stack:
- SvelteKit 2 + adapter-static
- Svelte 5 runes ($state, $derived, $effect, $props)
- Vite 7 + @sveltejs/vite-plugin-svelte 6
- Tailwind 4 (Vite plugin)
- ESLint 9 (flat) + eslint-plugin-svelte
- Pure JS + JSDoc, no TypeScript
Source moves:
- app/page.jsx → src/routes/+page.svelte
- app/master/page.jsx → src/routes/master/+page.svelte
- app/layout.jsx → src/routes/+layout.svelte (+ +layout.js)
- components/player-board.jsx → src/lib/PlayerBoard.svelte
- lib/game-logic.js → src/lib/game-logic.js (verbatim)
- next.config.mjs → svelte.config.js + vite.config.js
- app/globals.css → src/app.css
- (new) → src/app.html
Behavior preserved: PlayerBoard with bingo "Kinh!" popup + waiting "Chờ X"
toast, master 9x10 tracking board with shuffled draw, host's own player
card via storagePrefix="loto_master_card", localStorage prefix model
(loto_*, loto_master, loto_master_card_*), basePath dual mode (CF default
empty, BUILD_PROFILE=gh → /loto, codeserver dev → /absproxy/{port}).
A11y kept from prior hardening: role-correct buttons, aria-pressed on
cells, role=dialog modal with Escape, role=status toast.
Plans: ts-to-jsdoc plan marked completed; sveltekit-refactor plan tracks
the work above. Docs under ./docs/ rewritten by docs-manager subagent to
match the SvelteKit terminology.
3.8 KiB
Development Roadmap
This document tracks future work only. Completed features live in git commit history, not here.
Currently Implemented Features
The app is fully functional for core gameplay:
- 9×9 player card generation with weighted number distribution
- Cell marking (toggle crossed state)
- Bingo detection and celebration popup
- "Chờ X" waiting notifications
- Host number drawing from 1–90 deck
- 9×10 master board tracking called numbers
- Host's own player card (isolated instance)
- localStorage persistence
- Dark mode
- Mobile responsive
- Offline capable
Idea Phase
Sound Effects on Bingo
Play celebratory chime or "Kinh!" voice snippet when row completes. Could use Web Audio API or <audio> tag. Status: Idea (no demand yet)
Undo Last Cell
Allow player to undo the most recent cross/uncross action. Requires change history or state snapshot. Status: Idea (low priority)
Theme Switcher
Explicit light/dark toggle button instead of relying on OS preference. Status: Idea (Tailwind already supports OS toggle)
PWA Install
Add service worker and manifest for "Install App" prompt on Android/iOS. Status: Idea (would require server-side components)
Considered Phase
Multiplayer Sync (Real-time)
Host and players connect via WebSocket to sync called numbers and state. Requires backend server. Would enable:
- Decoupled devices (players' phones, host's laptop on big screen)
- Remote tournaments
- Master board auto-updates all players in real-time
Consideration: Out of scope for static export. Requires major refactor (SvelteKit API routes + WebSocket server). Deferred indefinitely.
i18n Beyond Vietnamese
Internationalization (English, Chinese, etc.). Requires extraction of all Vietnamese strings and i18n library (next-intl). Status: Considered (low demand for non-Vietnamese users)
Undo/Redo System
Full undo/redo stack with history navigation. Adds complexity to state management. Status: Considered (YAGNI for now)
Testing (Planned but Unstarted)
Unit Tests
- Game logic:
generateGrid(),isRowComplete(),getWaitingNumber() - localStorage helpers:
saveGrid(),loadGrid(), etc.
Tech: Vitest (Vite's native test runner)
Component Tests
- PlayerBoard with mocked localStorage, $state/$derived verification
- Master page with different game states
E2E Tests
- Player flow: generate card → click cells → verify bingo popup
- Host flow: new game → draw numbers → verify board state
Tech: Playwright
Future Enhancements (Speculative)
Export/Import Card
Allow player to export their grid as image or JSON, import someone else's card. Use Canvas API or print-friendly CSS.
Leaderboard / Stats
Track games won, time per bingo, etc. Requires server-side persistence. Out of scope for static export.
Accessibility Improvements
- ARIA labels for grid cells
- Keyboard navigation (arrow keys to move, Enter to toggle)
- Screen reader support
Custom Number Range
Host selects range (e.g., 1–75 for American bingo) instead of hardcoded 1–90. Requires config UI and refactor of game logic constants.
Different Grid Sizes
Support 8×8 or 10×10 grids. Major refactor (NUM_ROWS, NUM_COLS constants, weighted selection algorithm).
Decision Rationale
All decisions follow YAGNI (You Aren't Gonna Need It), KISS (Keep It Simple), DRY (Don't Repeat Yourself):
- No multiplayer sync → adds server dependency, breaks static export (Cloudflare Pages)
- No i18n → Vietnamese-only community, localizing adds complexity
- No testing → small codebase (<300 LOC), manual testing covers critical paths; add when code grows
- No undo/redo → simple game, mistakes are play experience
- Svelte 5 runes → cleaner reactivity than hooks, smaller mental model
Future work gates on real user demand, not speculation.
Last reviewed: 2026-04-26