import { css, customElement, html, LitElement, property, } from 'lit-element'; @customElement(MyElement.is) export class MyElement extends LitElement { static get is() { return 'my-element'; } public static styles = [ css` :host { display: block; } * { box-sizing: border-box; } `, ]; @property({ type: String }) public name: string = 'Hello, World!'; protected render() { return html`