Added LitCounter.js

examples/framework-multiple/src/components/LitCounter.js

@@ -0,0 +1,33 @@
+import { LitElement, html } from 'lit';
+
+export const tagName = 'my-counter';
+
+class Counter extends LitElement {
+	static get properties() {
+		return {
+			count: {
+				type: Number,
+			},
+		};
+	}
+
+	constructor() {
+		super();
+		this.count = 0;
+	}
+
+	increment() {
+		this.count++;
+	}
+
+	render() {
+		return html`
+			<div>
+				<p>Count: ${this.count}</p>
+				<button type="button" @click=${this.increment}>Increment</button>
+			</div>
+		`;
+	}
+}
+
+customElements.define(tagName, Counter);