CSS Modules

CSS Modules are a styling approach where class names and animation names are scoped locally by default. Unlike traditional global CSS, which can lead to naming collisions and unintended style overrides, CSS Modules ensure that styles are applied only to the components they are defined for—creating more predictable and maintainable stylesheets in large applications.

When using CSS Modules, the class names are automatically transformed into unique identifiers at build time, preventing clashes across different parts of an application.

Key Practices and Features:

• Local Scoping: Each class name is scoped to the file/component it's used in, avoiding global conflicts.

Importing Styles: Styles are imported as objects in JavaScript/JSX:

 jsxCopyEditimport styles from './Button.module.css';  
<button className={styles.primary}>Click Me</button>

• Composition: CSS Modules support composes: to inherit styles from other classes within the same or other modules.
  
  

• Tooling Support: Works seamlessly with build tools like Webpack or Vite when properly configured.

Why CSS Modules Matter

In large or team-based codebases, global CSS can quickly become unmanageable. CSS Modules promote modularity, encapsulation, and scalability—making styles easier to reason about and refactor over time. They also work well in component-driven development paradigms like those used in React or Vue.

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