Counter with Color Themes - Inferno Typing CST Test

Counter with Color Themes — Inferno Code

Cycles through multiple color themes.

import { render, Component } from 'inferno';

const themes = ['light-theme','dark-theme','blue-theme'];

class Counter extends Component {
	state = { count: 0, current: 0, theme: themes[0] };

	increment = () => this.setState({ count: this.state.count + 1 });
	decrement = () => this.setState({ count: this.state.count - 1 });
	reset = () => this.setState({ count: 0 });
	toggleTheme = () => { const next = (this.state.current + 1) % themes.length; this.setState({ current: next, theme: themes[next] }); };

	render() {
		return (
		<div className={this.state.theme}>
		<h2>Counter: {this.state.count}</h2>
		<div>
		<button onClick={this.increment}>+</button>
		<button onClick={this.decrement}>-</button>
		<button onClick={this.reset}>Reset</button>
		</div>
		<button onClick={this.toggleTheme}>Switch Theme</button>
		</div>
		);
	}
}

render(<Counter />, document.body);

Inferno Language Guide

Inferno.js is an extremely fast, lightweight JavaScript library for building high-performance user interfaces. It uses a React-like API and Virtual DOM but is optimized for speed, small size, and predictable rendering.

More Inferno Typing Exercises

Practice Other Languages