storybook/docs/snippets/svelte/loader-story.js.mdx

```js
// TodoItem.stories.js

import fetch from 'node-fetch';

import TodoItem from './TodoItem.svelte';

export const Primary = (args, { loaded: { todo } }) => ({
  Component: TodoItem,
  props: {...args, ...todo},
});

Primary.loaders = [
  async () => ({
    todo: (await fetch('https://jsonplaceholder.typicode.com/todos/1')).json(),
  }),
];
```