Preact is a fast, lightweight alternative to Facebook’s React library, with a similar design philosophy and programming model. It allows you to build web applications using a declarative component-based architecture, and it includes features such as virtual DOM rendering, diffing, and patching for efficient updates. Preact is just 3kB in size, making it an attractive choice for performance-critical applications.
To set up a Preact application, you can use the Preact CLI tool, which provides a simple way to create, build, and deploy Preact projects. Here’s an example of how to create a new Preact project:
npx create-preact-app my-app
This will create a new Preact application in a directory called my-app
. You can then navigate to that directory and start the development server:
cd my-app
npm start
This will start the development server and open your application in a web browser.
Preact components are custom HTML elements that encapsulate a specific piece of functionality or behavior. Here’s an example of a simple Preact component that displays a greeting message:
import { h, Component } from 'preact';
class Greeting extends Component {
render() {
return <h1>Hello, {this.props.name}!</h1>;
}
}
This component can be used in another component like this:
import { h, render } from 'preact';
import Greeting from './Greeting';
render(<Greeting name="Alice" />, document.body);
Preact Router is a routing library for Preact that allows you to create single-page applications with multiple views. Here’s an example of how to use Preact Router:
First, install Preact Router:
npm install preact-router
Then, create some routes:
import { Router, Route } from 'preact-router';
function App() {
return (
<Router>
<Route path="/" component={Home} />
<Route path="/about" component={About} />
<Route path="/contact" component={Contact} />
</Router>
);
}
function Home() {
return <h1>Home</h1>;
}
function About() {
return <h1>About</h1>;
}
function Contact() {
return <h1>Contact</h1>;
}
Finally, render the App
component:
import { render } from 'preact';
import App from './App';
render(<App />, document.body);
This will create a single-page application with three views: Home, About, and Contact.
For more information on Preact, Preact Router, and other related technologies, check out the following resources:
- Preact documentation
- Preact Router documentation
- Enzyme adapter for Preact
- Preact CLI documentation
- Preact and TypeScript
- Preact and Webpack
- Preact and Sass
- Preact and Firebase
- Preact and Jest
- Preact and Luxon
These resources provide detailed information on how to use Preact, Preact Router, and related technologies to build web applications. They cover topics such as component design, routing, testing, and deployment. By studying these resources and practicing with hands-on projects, you can become proficient in Preact and build high-performance web applications.