```js
// Button.stories.js

import Button from './Button.svelte';

export default {
  /* 👇 The title prop is optional.
  * See https://storybook.js.org/docs/7.0/svelte/configure/overview#configure-story-loading
  * to learn how to generate automatic titles
  */
  title: 'Button',
  component: Button,
  //👇 Creates specific argTypes
  argTypes: {
    backgroundColor: { control: 'color' },
  },
  args: {
    //👇 Now all Button stories will be primary.
    primary: true,
  },
};
```