JavaScript Project Ideas
Build these projects to solidify your JavaScript skills — from beginner to advanced
Last updated on
The best way to learn is to build. Each project is designed to reinforce specific JavaScript concepts. Build them with Vanilla JS — no frameworks.
Beginner Projects
1. Todo App with LocalStorage
Concepts: DOM manipulation, event handling, localStorage, CRUD operations
Features:
- Add, edit, delete, and mark tasks complete
- Filter by All / Active / Completed
- Persist data in localStorage
- Clear completed button
2. Calculator
Concepts: Event delegation, state management, string/number conversion
Features:
- Basic arithmetic operations
- Decimal support
- Keyboard input support
- Clear and backspace
3. Digital Clock / Countdown Timer
Concepts: setInterval, Date object, DOM updates
Features:
- Real-time clock display
- Countdown timer with start/pause/reset
- Alarm notification when timer ends
Intermediate Projects
4. Weather App (API-based)
Concepts: Fetch API, async/await, error handling, DOM rendering
Features:
- Search by city name
- Display current weather + 5-day forecast
- Geolocation API for auto-detect
- Error handling for invalid cities
- Loading states
5. Expense Tracker
Concepts: Array methods (filter, reduce, map), localStorage, form validation
Features:
- Add income/expense with category
- Running balance calculation
- Filter by date range or category
- Chart visualization (use Canvas API)
- Export as CSV
6. Infinite Scroll Image Gallery
Concepts: IntersectionObserver, fetch, throttle, lazy loading
Features:
- Fetch images from Unsplash API
- Infinite scroll loading
- Lazy load images (load when visible)
- Masonry grid layout
- Click to view full-size
7. Quiz Application
Concepts: State management, timers, DOM manipulation, data structures
Features:
- Multiple question types (MCQ, true/false)
- Timer per question
- Score tracking
- Review answers after completion
- Store high scores
Advanced Projects
8. Kanban Board (Trello Clone)
Concepts: Drag & Drop API, complex state, event delegation, localStorage
Features:
- Multiple columns (Todo, In Progress, Done)
- Drag and drop cards between columns
- Add/edit/delete cards
- Persist board state
- Color labels
9. Real-Time Chat (WebSocket)
Concepts: WebSocket API, async communication, DOM updates, scroll management
Features:
- Connect to WebSocket server
- Send/receive messages in real-time
- Username support
- Auto-scroll to latest message
- Connection status indicator
10. Custom Video Player
Concepts: HTML5 Video API, custom controls, event listeners, CSS
Features:
- Custom play/pause, volume, seek bar
- Playback speed control
- Fullscreen toggle
- Keyboard shortcuts
- Picture-in-picture
How to Get the Most Out of Projects
- No tutorials — read the docs, figure it out yourself
- Plan first — sketch the UI and list features before coding
- Start simple — get the MVP working, then add features
- Refactor — clean up your code after it works
- Deploy — put it online (GitHub Pages, Netlify, Vercel)
- Write about it — explaining solidifies understanding
What Each Project Tests
| Project | Key Concepts |
|---|---|
| Todo App | DOM, events, localStorage, CRUD |
| Calculator | Event delegation, state, math |
| Weather App | Fetch, async/await, error handling |
| Expense Tracker | Arrays, reduce, form validation |
| Infinite Scroll | IntersectionObserver, lazy loading |
| Kanban Board | Drag & Drop, complex state |
| Chat App | WebSocket, real-time updates |
| Video Player | Media API, custom controls |
Congratulations! 🎉 You've completed the JavaScript Master Roadmap. Go back and review any topics you're less confident about, then start building projects!