storybook/code/frameworks/web-components-webpack5/template/cli/ts-4-9/Button.ts

import { html } from 'lit';
import { styleMap } from 'lit/directives/style-map.js';

import './button.css';

export interface ButtonProps {
  /** Is this the principal call to action on the page? */
  primary?: boolean;
  /** What background color to use */
  backgroundColor?: string;
  /** How large should the button be? */
  size?: 'small' | 'medium' | 'large';
  /** Button contents */
  label: string;
  /** Optional click handler */
  onClick?: () => void;
}
/** Primary UI component for user interaction */
export const Button = ({ primary, backgroundColor, size, label, onClick }: ButtonProps) => {
  const mode = primary ? 'storybook-button--primary' : 'storybook-button--secondary';

  return html`
    <button
      type="button"
      class=${['storybook-button', `storybook-button--${size || 'medium'}`, mode].join(' ')}
      style=${styleMap({ backgroundColor })}
      @click=${onClick}
    >
      ${label}
    </button>
  `;
};