Storybook

Storybook is a tool for building and reviewing UI components outside the screens that use them. Each component gets one or more stories: small, named examples of the component in a specific state, such as a button that is loading, disabled or showing a very long label.

React Native Storybook, the @storybook/react-native package, renders those stories inside your app on a simulator, emulator or phone. You switch from the real app to a Storybook UI, pick a story, and adjust its props live with controls. Because it runs natively, you see real fonts, shadows, safe areas and platform differences, which a browser cannot show you faithfully.

Stories use the Component Story Format shared with web Storybook:

import type { Meta, StoryObj } from '@storybook/react-native';
import { Button } from './Button';

const meta: Meta<typeof Button> = { component: Button };
export default meta;

export const Disabled: StoryObj<typeof Button> = { args: { title: 'Pay', disabled: true } };

Why teams use it:

• Build a component without navigating five screens deep or faking backend data to reach the right state.
• Give designers and reviewers a catalogue of every component and variant, which keeps a design system built on design tokens honest.
• Reuse stories as test fixtures, so tests render the same states you review visually.

Teams can also render stories in a browser through React Native Web for easier sharing, at the cost of not seeing true native rendering.

The usual gotcha is shipping Storybook to users. It must be switched on by an environment variable or a development-only entry point, and excluded from production builds, or it adds weight and exposes internal screens. The other is stories that silently rot: components that need providers such as a theme or navigation must be wrapped with decorators, or the stories break the moment those dependencies change.