{
Object.assign(btn2, {
style: "border: 2px solid green; cursor: pointer;"
});
btn2.appendChild(html`Counter <div class="counter">0</div>`)
RxJs.fromEvent(btn2, "click")
.pipe(RxJs.scan(count => count + 1, 0))
.subscribe(count => {
console.log(`Clicked ${count} times`);
btn2.querySelector('.counter').innerHTML=count
});
}