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async npm modules
https://codepen.io/developit/pen/NBbgNb?editors=0010
// quick tip: an import alias that loads npm modules!
const npm = p => import(`https://unpkg.com/${p}?module`);

(async () => {
    const { h, Component, render } = await npm('preact');
    class Clock extends Component {
        componentWillMount() {
            const tick = () => this.setState({ time: new Date() });
                setInterval(tick, 1000);
                tick();
        }
        render({ }, { time }) {
            return h('time', { title: time+'' }, time.toLocaleTimeString());
        }
    }
    render(h(Clock), document.body);
})();