Advanced Decorator Techniques in Storybook.js

1. Introduction

Storybook.js provides a powerful way to develop UI components in isolation. Advanced decorators can enhance the functionality of your stories, allowing for customizable and reusable components.

2. Key Concepts

• Decorator: A function that wraps your story, modifying its rendering or behavior.
• Context: The environment in which your component operates, including global settings and data.
• Args: Arguments passed to your story that can modify its appearance or behavior dynamically.

3. Decorator Types

3.1 Global Decorators

Global decorators apply to all stories within a Storybook. They are defined in the `preview.js` file.

import { addDecorator } from '@storybook/react';
import { ThemeProvider } from 'styled-components';
import theme from './theme';

addDecorator((storyFn) => (
    
        {storyFn()}
    
));
            

3.2 Local Decorators

Local decorators are specific to a single story or component and can be defined directly in the story file.

export const MyStory = () => ;

MyStory.decorators = [(Story) => 
];
            

4. Code Examples

Here are some advanced examples of decorators in action.

4.1 Conditional Decorators

const withConditionalDecorator = (Story, context) => {
    return context.args.showDecorator ? 
 : ;
};

export const MyStory = () => ;
MyStory.decorators = [withConditionalDecorator];
            

4.2 Multiple Decorators

const withDecoratorOne = (Story) => 
;
const withDecoratorTwo = (Story) => 
;

export const MyStory = () => ;
MyStory.decorators = [withDecoratorOne, withDecoratorTwo];
            

5. Best Practices

• Use decorators to encapsulate common patterns across stories.
• Keep decorators lightweight to avoid performance issues.
• Document the purpose of each decorator clearly.
• Test decorators independently to ensure they work as expected.

6. FAQ