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Adding A Sass Stylesheet

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This feature is available with react-scripts@2.0.0 and higher.

When working with React components, it's generally recommended not to reuse the same CSS classes across different components. Instead, it's better to create separate component styles and compose them together. However, if you find CSS preprocessors valuable, you can integrate Sass into your React project.

To use Sass in your Create React App project, follow these steps:

Step 1: Install Sass​

First, install the sass package by running the following command in your project's terminal:

Terminal
$ npm install sass
# or
$ yarn add sass

Step 2: Rename and Import the Sass Stylesheet​

Next, rename the src/App.css file to src/App.scss. This will signal Create React App to use the Sass compiler for this file. Update src/App.js to import src/App.scss as follows:

App.js
import React from 'react';
import './App.scss';

function App() {
  // Your component code goes here
  return (
    // JSX code
  );
}

export default App;

By importing the Sass file, Create React App will automatically compile it.

Step 3: Share Variables Between Sass Files​

To share variables between Sass files, you can use the @use rule provided by Sass. For example, in src/App.scss or other component style files, you can include the following line to import a shared Sass file with variable definitions:

@use "./shared.scss";

You can then use those variables within your component styles.

Step 4: Importing External Sass Files​

To import Sass files from external sources or libraries, you can use the @use rule. Here are a couple of examples:

@use 'styles/_colors.scss'; // assuming a styles directory under src/
@use '~nprogress/nprogress'; // loading a CSS file from the nprogress node module

The ~ symbol followed by the module name allows you to resolve modules from the node_modules directory.

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If you're using Windows, separate your paths by semicolons:

SASS_PATH=path1;path2;path3

Step 5: Using Sass with CSS Modules​

You can also use Sass in combination with CSS modules. To enable this feature, follow the same steps mentioned above, but use .module.scss as the file extension instead (e.g., src/App.module.scss).

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If you're using Flow, make sure to update your .flowconfig file to recognize .sass or .scss files. Add the following lines to the [options] section:

module.file_ext=.sass
module.file_ext=.scss
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LibSass and the packages built on top of it, including Node Sass, are deprecated. If you're currently using Node Sass, it's recommended to migrate to Dart Sass. You can do this by replacing node-sass in your package.json file with sass or by running the following commands:

$ npm uninstall node-sass
$ npm install sass
# or
$ yarn remove node-sass
$ yarn add sass

That's it! You've successfully added a Sass stylesheet to your Create React App project. Now you can leverage the power of Sass to write cleaner and more maintainable styles for your React components.

Some popular resources and official sites that beginners can refer to when learning about adding Sass stylesheets in a React project:

  1. Sass Documentation - The official Sass documentation is an excellent resource for learning about Sass features, syntax, and usage. It provides comprehensive guides, examples, and explanations: Sass Documentation

  2. Create React App Documentation - The official documentation for Create React App includes a section on adding Sass stylesheets. It provides instructions and guidelines specific to Create React App projects: Create React App - Adding a Sass Stylesheet

  3. React Documentation - The official React documentation is a valuable resource for understanding React concepts and features. While it doesn't specifically focus on Sass, it provides information on working with styles in React components: React Documentation - Styling and CSS

  4. Sass Guidelines - The Sass Guidelines website offers a collection of best practices, tips, and coding conventions for writing maintainable Sass code. It covers various aspects of Sass development, including architecture and organization: Sass Guidelines

  5. CSS-Tricks - CSS-Tricks is a popular web development resource that covers a wide range of topics, including Sass. It has a dedicated section with tutorials, articles, and examples related to Sass: CSS-Tricks - Sass

  6. Smashing Magazine - Smashing Magazine is a well-known online publication for web designers and developers. It has a collection of articles and tutorials related to Sass, covering different aspects and techniques: Smashing Magazine - Sass

  7. SitePoint - SitePoint offers an extensive library of web development tutorials and articles. It has a section dedicated to Sass, featuring tutorials, tips, and tricks for using Sass in various contexts: SitePoint - Sass

These resources should provide beginners with a solid foundation for learning about Sass and its integration with React. Remember to provide appropriate attribution and links to the original sources when including content from these sites on your own website.