storybook/docs/snippets/react/page-story-slots.ts.mdx

```js
// Page.stories.js

import React from 'react';
import { Story, Meta } from '@storybook/react';
import Page from './Page';

export default {
  component: Page,
  title: 'Page',
} as Meta;

const Template: Story<Page> = (args, { argTypes }) => (
  <Page {...args}>
    <footer>{args.footer}</footer
  </Page>
);

export const CustomFooter = Template.bind({});
CustomFooter.args = {
  footer: 'Built with Storybook',
};
```