deka-dom-el/docs/components/examples/introducing/helloWorld.js

import { el } from "deka-dom-el";
import { S } from "deka-dom-el/signals";

// A HelloWorld component using the 3PS pattern
function HelloWorld({ emoji = "🚀" }) {
	// PART 1: Create reactive state
	const clicks = S(0);

	return el().append(
		// PART 2: Bind state to UI elements
		el("p", {
			className: "greeting",
			// This paragraph automatically updates when clicks changes
			textContent: S(() => `Hello World ${emoji.repeat(clicks.get())}`)
		}),

		// PART 3: Update state in response to events
		el("button", {
			type: "button",
			textContent: "Add emoji",
			// When clicked, update the state
			onclick: () => clicks.set(clicks.get() + 1)
		})
	);
}

// Use the component in your app
document.body.append(
	el(HelloWorld, { emoji: "🎉" })
);