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React Styling | React Tutorial

Learn about React Styling in this comprehensive React tutorial for frontend web development. Master the className attribute, explore inline styles with JavaScript objects, and learn to organize your styles using CSS Modules for scalable architectures.

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Style Node

Component visual protocols.

Quick Quiz //

Why do we use 'className' instead of 'class' in React?


Styling is what brings your components to life. In React, we have multiple ways to apply CSS, each with its own strengths for different use cases.

1Attributes and Props

The most important rule in React styling is the use of className instead of the standard 'class' attribute. This is necessary because React is JavaScript, and 'class' is already a reserved keyword for defining JS classes. For dynamic, data-driven styles, the style prop allows you to pass a JavaScript object directly to an element, providing fine-grained control over individual properties like colors or positions that change based on state.

2CSS Modules and Scoping

As applications grow, global CSS can lead to naming collisions. CSS Modules solve this by scoping your styles to the component. When you import a module, React transforms your class names into unique strings, ensuring that a '.btn' class in one component doesn't interfere with a '.btn' in another. This modular approach is key to building maintainable large-scale systems.

?Frequently Asked Questions

Pascual Vila

Pascual Vila

Frontend Instructor // Code Syllabus

Lesson Glossary

[01]className

The React equivalent of the standard 'class' attribute.

Code Preview
className='box'

[02]Inline Style

Applying styles directly to an element using a JavaScript object.

Code Preview
style={{ color: 'red' }}

[03]CSS Modules

A CSS file where all class names and animation names are scoped locally by default.

Code Preview
styles.module.css

[04]Dynamic Styling

Changing the appearance of a component based on state or props.

Code Preview
isActive ? 'active' : ''

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