storybook/docs/snippets/web-components/button-story.ts.mdx

```ts
// Button.stories.ts

import type { Meta, StoryObj } from '@storybook/web-components';

import { html } from 'lit';

const meta: Meta = {
  title: 'Button',
  component: 'demo-button',
};
export default meta;

type Story = StoryObj;

export const Primary: Story = {
  render: () => html`<demo-button primary></demo-button>`,
};
```