storybook/docs/snippets/svelte/my-component-story-configure-viewports.ts-4-9.mdx

```ts
// MyComponent.stories.ts

import type { Meta, StoryObj } from '@storybook/svelte';
import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport';

import MyComponent from './MyComponent.svelte';

const meta = {
  component: MyComponent,
  parameters: {
    //👇 The viewports object from the Essentials addon
    viewport: {
      //👇 The viewports you want to use
      viewports: INITIAL_VIEWPORTS,
      //👇 Your own default viewport
      defaultViewport: 'iphone6',
    },
  },
} satisfies Meta<typeof MyComponent>;

export default meta;
type Story = StoryObj<typeof meta>;

export const MyStory: Story = {
  parameters: {
    viewport: {
      defaultViewport: 'iphonex',
    },
  },
};
```