Viewport

The Viewport toolbar item allows you to adjust the dimensions of the iframe your story is rendered in. It makes it easy to develop responsive UIs.

Configuration

Out of the box, the Viewport addon offers you a standard set of viewports that you can use. If you want to change the default set of viewports, you can configure your own viewports with the viewport parameter in your .storybook/preview.js.

You can define the available viewports using the viewports property and set the initial viewport using the defaultViewport property:

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import { Preview } from '@storybook/your-renderer';
import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport';
 
const preview: Preview = {
  parameters: {
    viewport: {
      viewports: INITIAL_VIEWPORTS,
      defaultViewport: 'ipad',
    },
  },
};
 
export default preview;

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import { Preview } from '@storybook/your-renderer';
 
const preview: Preview = {
  parameters: {
    viewport: {
      viewports: INITIAL_VIEWPORTS,
    },
  },
  initialGlobals: {
    viewport: { value: 'ipad', isRotated: false },
  },
};
 
export default preview;

Use a detailed set of devices

By default, the Viewport addon will use a minimal set of viewports, which enables you to test your UI in common responsive scenarios. These are also available in the MINIMAL_VIEWPORTS export and include the following devices:

If you need a more detailed set of devices, you can use the INITIAL_VIEWPORTS export, which includes the following devices:

To use the detailed set of devices, you can replace the viewports property in your configuration with the INITIAL_VIEWPORTS export:

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import { Preview } from '@storybook/your-renderer';
import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport';
 
const preview: Preview = {
  parameters: {
    viewport: {
      viewports: INITIAL_VIEWPORTS,
      defaultViewport: 'ipad',
    },
  },
};
 
export default preview;

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import { Preview } from '@storybook/your-renderer';
 
const preview: Preview = {
  parameters: {
    viewport: {
      viewports: INITIAL_VIEWPORTS,
    },
  },
  initialGlobals: {
    viewport: { value: 'ipad', isRotated: false },
  },
};
 
export default preview;

Add new devices

If the predefined viewports don't meet your needs, you can add new devices to the list of viewports. For example, let's add two Kindle devices to the default set of minimal viewports:

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import { Preview } from '@storybook/your-renderer';
import { MINIMAL_VIEWPORTS } from '@storybook/addon-viewport';
 
const kindleViewports = {
  kindleFire2: {
    name: 'Kindle Fire 2',
    styles: {
      width: '600px',
      height: '963px',
    },
  },
  kindleFireHD: {
    name: 'Kindle Fire HD',
    styles: {
      width: '533px',
      height: '801px',
    },
  },
};
 
const preview: Preview = {
  parameters: {
    viewport: {
      viewports: {
        ...MINIMAL_VIEWPORTS,
        ...kindleViewports,
      },
    },
  },
};
 
export default preview;

Configuring per component or story

In some cases, it's not practical for you to use a specific visual viewport on a global scale, and you need to adjust it to an individual story or set of stories for a component.

Parameters can be applied at the project, component, and story levels, which allows you to specify the configuration where needed. For example, you can set the available viewports for all of the stories for a component like so:

import type { Meta, StoryObj } from '@storybook/react';
import { INITIAL_VIEWPORTS } from '@storybook/addon-viewport';
 
import { MyComponent } from './MyComponent';
 
const meta: Meta<typeof MyComponent> = {
  component: MyComponent,
  parameters: {
    viewport: {
      //👇 Set available viewports for every story in the file
      viewports: INITIAL_VIEWPORTS,
    },
  },
};
 
export default meta;

Defining the viewport for a story

The Viewport addon enables you to change the viewport applied to a story by selecting from the list of predefined viewports in the toolbar. If needed, you can set a story to default to a specific viewport, by using the parameters.viewport.default parameter:

// Replace your-framework with the name of your framework
import type { Meta, StoryObj } from '@storybook/your-framework';
 
import { Button } from './Button';
 
const meta: Meta<typeof Button> = {
  component: Button,
  parameters: {
    // 👇 Set default viewport for all component stories
    viewport: { defaultViewport: 'tablet' },
  },
};
 
export default meta;
type Story = StoryObj<typeof Button>;
 
export const OnPhone: Story = {
  parameters: {
    // 👇 Override default viewport for this story
    viewport: { defaultViewport: 'mobile1' },
  },
};

As implied by the name, this method only sets the default viewport for a story. You can still change the viewport using the toolbar when viewing the story.

// Replace your-renderer with the renderer you are using (e.g., react, vue3, angular, etc.)
import type { Meta, StoryObj } from '@storybook/your-renderer';
 
import { Button } from './Button';
 
const meta: Meta<typeof Button> = {
  component: Button,
  globals: {
    // 👇 Set viewport for all component stories
    viewport: { value: 'tablet', isRotated: false },
  },
};
 
export default meta;
type Story = StoryObj<typeof Button>;
 
export const OnPhone: Story = {
  globals: {
    // 👇 Override viewport for this story
    viewport: { value: 'mobile1', isRotated: false },
  },
};

API

Keyboard shortcuts

If you need, you can edit these on the shortcuts page.

• Next viewport: alt + v
• Previous viewport: alt + shift + v
• Reset viewport: alt + control + v

Parameters

This addon contributes the following parameters to Storybook, under the viewport namespace:

defaultOrientation

Type: 'portrait' | 'landscape'

Default: 'portrait'

Specifies the default orientation used when viewing a story. Only available if you haven't enabled the globals API.

defaultViewport

Type: string

Specifies the default viewport used when viewing a story. Must match a key in the viewports (or options) object.

disable

Type: boolean

Turn off this addon's behavior. If you wish to turn off this addon for the entire Storybook, you should do so when registering addon-essentials. See the essential addon's docs for more information.

This parameter is most useful to allow overriding at more specific levels. For example, if this parameter is set to true at the project level, it could be re-enabled by setting it to false at the meta (component) or story level.

viewports

Type:

{
  [key: string]: {
    name: string;
    styles: { height: string, width: string };
    type: 'desktop' | 'mobile' | 'tablet';
  };
}

Specify the available viewports. See usage example above. The width and height values must include the unit, e.g. '320px'.

{
  [key: string]: {
    name: string;
    styles: { height: string, width: string };
    type: 'desktop' | 'mobile' | 'tablet' | 'other';
  };
}

Exports

This addon contributes the following exports to Storybook:

import { INITIAL_VIEWPORTS, MINIMAL_VIEWPORTS } from '@storybook/addon-viewport';

INITIAL_VIEWPORTS

Type: object

The full set of initial viewports provided by the Viewport addon, listed above.

MINIMAL_VIEWPORTS

Type: object

A minimal set of viewports provided by the Viewport addon listed above. These are used by default.