Counter with Auto-Increment - Preact Typing CST Test
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Counter with Auto-Increment — Preact Code
Automatically increments counter every second.
import { h } from 'preact';
import { useState, useEffect } from 'preact/hooks';
function AutoIncrementCounter() {
const [count, setCount] = useState(0);
useEffect(() => { const interval = setInterval(() => setCount(c => c + 1), 1000); return () => clearInterval(interval); }, []);
return <h2>Counter: {count}</h2>;
}
export default AutoIncrementCounter;Preact Language Guide
Preact is a fast, lightweight JavaScript library for building user interfaces with a React-like API. It emphasizes small bundle size, performance, and compatibility with modern web standards while providing an easy transition for React developers.
Primary Use Cases
- ▸Small to medium web applications
- ▸Mobile-first web apps
- ▸Interactive widgets and components
- ▸Progressive web apps (PWAs)
- ▸High-performance client-side rendering
Notable Features
- ▸Small bundle size (~3KB gzipped)
- ▸React-compatible API
- ▸Fast virtual DOM rendering
- ▸Component-based architecture
- ▸Optional ecosystem add-ons (preact/compat)
Origin & Creator
Created by Jason Miller and first released in 2015, Preact was designed as a lightweight alternative to React for high-performance web applications.
Industrial Note
Preact excels in projects where bundle size, speed, and React compatibility are crucial, such as mobile-first web apps, embedded widgets, and highly interactive UIs.