CSS Modules is a popular approach to styling in React applications that allows for modular and scoped CSS. CSS Modules works by generating unique class names for each CSS module at build time, and then using those class names to apply styles to components.
When using CSS Modules in a React application, each CSS file is treated as a separate module. The CSS file is then imported into the JavaScript file for the component that it styles, and the class names are accessed as properties on an object that is returned by the import statement.
For example, let’s say we have a component called `Button` and a CSS file called `button.module.css`. We can import the CSS file into the `Button` component like this:
import styles from './button.module.css';
We can then apply styles to the `Button` component using the class names defined in `button.module.css`:
function Button() {
return ;
}
The `styles.button` property is a dynamically generated class name that is unique to the `button.module.css` file. This ensures that the CSS styles defined in `button.module.css` only apply to the `Button` component, and not to other components in the application.
CSS Modules also supports other features such as global styles, dynamic class names, and composition, which allow for more advanced styling techniques.
Overall, CSS Modules is a powerful and flexible approach to styling in React applications that provides modular and scoped CSS. It can be a great choice for applications that require complex styling, or for teams that prefer a more modular approach to styling in their applications.