Counter with Double Increment - Inferno Typing CST Test
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Counter with Double Increment — Inferno Code
Counter increments by 2 with a special button.
import { render, Component } from 'inferno';
class Counter extends Component {
state = { count: 0, isDark: false };
increment = () => this.setState({ count: this.state.count + 1 });
doubleIncrement = () => this.setState({ count: this.state.count + 2 });
decrement = () => this.setState({ count: this.state.count - 1 });
reset = () => this.setState({ count: 0 });
toggleTheme = () => this.setState({ isDark: !this.state.isDark });
render() {
return (
<div className={this.state.isDark ? 'dark-theme' : 'light-theme'}>
<h2>Counter: {this.state.count}</h2>
<div>
<button onClick={this.increment}>+</button>
<button onClick={this.doubleIncrement}>++</button>
<button onClick={this.decrement}>-</button>
<button onClick={this.reset}>Reset</button>
</div>
<button onClick={this.toggleTheme}>Toggle 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.
Primary Use Cases
- ▸High-performance SPAs
- ▸Real-time dashboards and charts
- ▸Embedded widgets with small footprint
- ▸React-compatible environments needing speed
- ▸Apps requiring extremely fast client-side rendering
Notable Features
- ▸Ultra-fast Virtual DOM (faster than React in many benchmarks)
- ▸React-like components and lifecycle
- ▸Small bundle size (~9 KB)
- ▸Server-side rendering support
- ▸Partial React API compatibility
Origin & Creator
Created by Dominic Gannaway in 2016 as a high-performance alternative to React, with an emphasis on speed and small bundle size.
Industrial Note
Inferno is primarily used in performance-sensitive environments like financial dashboards, advertising tech, streaming interfaces, and embedded web widgets.