Introduction
Typing tests are everywhere, but many focus only on one thing:
"How fast can you type?"
I wanted to build something different.
Something that feels like a real typing environment - fast, customizable, and enjoyable.
That's how RhythmKey was created.
RhythmKey is an open-source typing application built with React, Tailwind CSS, and Vite that combines:
- Real-time typing analytics
- Multiple test modes
- Custom themes
- Mechanical keyboard sounds
- Smooth animations
- Detailed performance tracking
The goal was simple:
Create a typing experience that helps users improve while actually enjoying the process.
In this article, I'll share how I built RhythmKey, the architecture behind it, and the challenges I solved along the way.
Features That Make RhythmKey Different
Multiple Typing Modes
RhythmKey supports different practice styles:
- Time tests (15s, 30s, 60s, 120s)
- Word challenges
- Stories
- Quotes
- Infinite typing
- Custom text
Real-Time Statistics
During every test, users can see:
- WPM
- Accuracy
- Mistakes
- Backspaces
- Progress tracking
- Consistency
The calculations update instantly while typing.
Custom Mechanical Keyboard
One of my favorite parts of RhythmKey is the custom keyboard experience.
The app includes:
- Animated on-screen keyboard
- QWERTY / AZERTY / DVORAK layouts
- Key highlighting
- Custom sound effects
Instead of generic typing sounds, RhythmKey includes different sound profiles:
- Mechanical switches
- Click sounds
- Typewriter style
The goal was to make typing feel more physical.
Personalization
Users can customize:
- Dark / Light / System themes
- Cursor styles
- Font size
- Sound settings
- Difficulty
- Punctuation
- Numbers
- Symbols
All settings are saved automatically.
Building the Architecture
RhythmKey is built with a component-based React architecture.
The main idea:
Keep UI components simple and move complex logic into reusable hooks.
Tech Stack
| Technology | Purpose |
|---|---|
| React | UI architecture |
| Vite | Fast development |
| Tailwind CSS | Styling |
| React Router | Navigation |
| LocalStorage | Data persistence |
| SVG | Performance graphs |
Custom Hooks
The application relies heavily on custom hooks:
useTypingTest
Handles:
- Typing state
- Timer
- Mistakes
- WPM calculation
useTypingHandlers
Controls:
- Keyboard input
- Shortcuts
- Sound triggers
useSettings
Manages:
- Preferences
- Themes
- Keyboard settings
useStats
Stores:
- History
- Best scores
- User progress
Creating a Real-Time Typing Engine
The hardest part of RhythmKey was creating a typing engine that feels instant.
Every key press needs to:
- Check the expected character
- Update the UI
- Track mistakes
- Play sounds
- Update statistics
A simplified version:
const expected =
currentText[userInput.length];
if(key !== expected){
setMistakes(prev => prev + 1);
}
Part 5 - Challenges & Lessons
Challenges I Solved
1. Making Typing Feel Natural
The first version felt too static.
I improved it by adding:
- Smooth cursor movement
- Better animations
- Instant feedback
- Sound responses
2. Saving User Preferences
Users expect their setup to remain.
I created a settings system using LocalStorage that remembers:
- Theme
- Keyboard layout
- Sounds
- Preferences
3. Supporting Multiple Keyboard Layouts
Supporting QWERTY, AZERTY, and DVORAK required custom key mapping logic.
The keyboard automatically adapts based on the selected layout.
What I Learned
Building RhythmKey taught me:
- Better React state management
- Designing reusable hooks
- Creating smooth user interactions
- Managing complex frontend logic
Future Improvements
Some ideas for the future:
- Multiplayer typing races
- More languages
- Advanced statistics
- Community themes
- Typing lessons
Try RhythmKey
Live Demo:
https://rhythmkey.vercel.app/
GitHub:
https://github.com/byllzz/rhythmkey
RhythmKey is open-source under the MIT License.
If you enjoyed it, feel free to ⭐ the repository or contribute.
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