{
const root = html`<div></div>`;
function tick() {
const element = htm`
<div>
<h1>Hello, world!</h1>
<h2>It is ${new Date().toLocaleTimeString()}.</h2>
</div>
`;
ReactDOM.render(element, root);
}
while (true) {
await Promises.tick(1000);
tick();
yield root;
}
}