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

```ts
// Button.stories.ts

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

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

type Story = StoryObj;

export const Primary: Story = {
  args: {
    primary: true,
    label: 'Button',
  },
};

export const Secondary: Story = {
  args: {
    ...Primary.args,
    primary: false,
  },
};
```