```js
// demo-button.stories.js

import { Button } from './demo-button';

export default {
  /* 👇 The title prop is optional.
   * See https://storybook.js.org/docs/7.0/web-components/configure/overview#configure-story-loading
   * to learn how to generate automatic titles
   */
  title: 'Button',
};

/*
 *👇 Render functions are a framework specific feature to allow you control on how the component renders.
 * See https://storybook.js.org/docs/7.0/web-components/api/csf
 * to learn how to use render functions.
 */

export const Primary = {
  render: (args) => Button(args),
  args: {
    background: '#ff0',
    label: 'Button',
  },
};

export const Secondary = {
  render: (args) => Button(args),
  args: {
    ...Primary.args,
    label: '😄👍😍💯',
  },
};

export const Tertiary = {
  render: (args) => Button(args),
  args: {
    ...Primary.args,
    label: '📚📕📈🤓',
  },
};
```