feat: use setAttribute

src/components/hello-world.js

@@ -9,8 +9,7 @@ export default class HelloWorld extends WebComponent {
     let count = 0;
     this.onclick = () => {
       console.log("Clicked!");
-      this.name = `I was clicked ${++count} times`;
-      this.render();
+      this.setAttribute("name", `I was clicked ${++count} times`);
     };
     this.setAttribute("title", "Click me please");
   }