sass vs @emotion/react vs styled-jsx vs styled-components
CSS-in-JS and Preprocessors Comparison
1 Year
sass@emotion/reactstyled-jsxstyled-componentsSimilar Packages:
What's CSS-in-JS and Preprocessors?

These packages provide various approaches to styling in web development, each with unique features and methodologies. They cater to different developer preferences and project requirements, enabling efficient styling practices. While some focus on dynamic styling through JavaScript, others emphasize traditional CSS preprocessing, allowing for a wide range of styling capabilities in modern web applications.

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sass16,194,1504,0415.69 MB737 days agoMIT
@emotion/react9,691,42517,654817 kB3483 months agoMIT
styled-jsx8,358,0087,7511.03 MB849 months agoMIT
styled-components6,304,26040,6991.66 MB313a month agoMIT
Feature Comparison: sass vs @emotion/react vs styled-jsx vs styled-components

Styling Methodology

  • sass:

    Sass is a CSS preprocessor that extends CSS with features like variables, nesting, and mixins. It compiles down to standard CSS, making it suitable for projects that require a more traditional approach to styling but with enhanced capabilities.

  • @emotion/react:

    @emotion/react utilizes a CSS-in-JS approach, allowing developers to write CSS directly within JavaScript files. This enables dynamic styling based on component props and themes, providing a powerful way to manage styles in a React application.

  • styled-jsx:

    styled-jsx is a CSS-in-JS solution specifically designed for Next.js. It allows developers to write scoped CSS directly in their components, ensuring styles are applied only to the respective component, thus avoiding global styles conflicts.

  • styled-components:

    styled-components also employs a CSS-in-JS methodology, allowing developers to create styled components that encapsulate styles within the component itself. This promotes modularity and reusability, making it easier to manage styles in large applications.

Dynamic Styling

  • sass:

    Sass does not inherently support dynamic styling as it compiles to static CSS. However, it allows for the use of variables and mixins to create reusable styles, which can help manage complex stylesheets more effectively.

  • @emotion/react:

    @emotion/react excels in dynamic styling, allowing styles to change based on component props and application state. This feature is particularly useful for creating responsive and interactive UI elements that adapt to user interactions.

  • styled-jsx:

    styled-jsx supports dynamic styling through JavaScript expressions, allowing styles to adapt based on component state or props. This makes it a flexible choice for styling in React components.

  • styled-components:

    styled-components provides robust support for dynamic styling, enabling developers to change styles based on props. This feature is particularly beneficial for creating responsive designs and theming within applications.

Performance

  • sass:

    Sass compiles to static CSS, which is inherently performant as it does not require runtime calculations. The performance largely depends on how the CSS is structured and organized, making it suitable for large-scale applications with complex styles.

  • @emotion/react:

    @emotion/react is optimized for performance, using a caching mechanism to minimize the runtime cost of styling. It ensures that styles are only recalculated when necessary, which can lead to improved rendering times in applications.

  • styled-jsx:

    styled-jsx is designed for performance in Next.js applications, ensuring that styles are scoped and only applied when necessary. This minimizes the impact on rendering performance, especially in server-rendered applications.

  • styled-components:

    styled-components can introduce some overhead due to its runtime styling capabilities. However, it offers features like server-side rendering and style deduplication to mitigate performance issues, making it suitable for modern React applications.

Learning Curve

  • sass:

    Sass has a relatively gentle learning curve for those already familiar with CSS. Its syntax enhancements are straightforward to grasp, making it an easy transition for CSS developers looking to improve their stylesheets.

  • @emotion/react:

    @emotion/react has a moderate learning curve, especially for those unfamiliar with CSS-in-JS concepts. However, its API is well-documented, making it accessible for developers transitioning from traditional CSS.

  • styled-jsx:

    styled-jsx is easy to learn for developers already familiar with CSS and React. Its syntax is intuitive, allowing developers to quickly integrate scoped styles into their components without a steep learning curve.

  • styled-components:

    styled-components has a moderate learning curve, particularly for developers new to CSS-in-JS. Understanding how to create styled components and manage props for dynamic styling may take some time, but it is well-documented and widely adopted.

Community and Ecosystem

  • sass:

    Sass has a long-standing community and is one of the most popular CSS preprocessors. It is widely supported and has a rich ecosystem of tools and frameworks that enhance its capabilities.

  • @emotion/react:

    @emotion/react has a strong community and is widely adopted in the React ecosystem. It integrates well with other libraries and tools, making it a popular choice for modern React applications.

  • styled-jsx:

    styled-jsx, while primarily focused on Next.js, has a growing community. Its integration with Next.js makes it a valuable tool for developers working within that framework.

  • styled-components:

    styled-components has a large and active community, with extensive resources and documentation available. Its popularity in the React ecosystem ensures ongoing support and development.

How to Choose: sass vs @emotion/react vs styled-jsx vs styled-components
  • sass:

    Choose Sass if you prefer a traditional CSS preprocessor that enhances CSS with features like variables, nesting, and mixins. It is ideal for projects that require complex stylesheets and a structured approach to CSS, especially when working with large codebases.

  • @emotion/react:

    Choose @emotion/react if you need a powerful CSS-in-JS solution that offers both performance and flexibility, allowing for dynamic styling based on props and themes. It integrates well with React and provides a rich API for styling components directly in JavaScript.

  • styled-jsx:

    Choose styled-jsx if you are using Next.js and want a simple way to style your components with scoped styles. It allows for writing CSS directly within your components, ensuring styles are encapsulated and only apply to the respective component.

  • styled-components:

    Choose styled-components if you want to leverage the full power of CSS-in-JS with a focus on component-based styling. It allows for scoped styles and dynamic styling based on props, making it a great choice for React applications that benefit from encapsulated styles.

README for sass

A pure JavaScript implementation of Sass. Sass makes CSS fun again.

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This package is a distribution of Dart Sass, compiled to pure JavaScript with no native code or external dependencies. It provides a command-line sass executable and a Node.js API.

Usage

You can install Sass globally using npm install -g sass which will provide access to the sass executable. You can also add it to your project using npm install --save-dev sass. This provides the executable as well as a library:

const sass = require('sass');

const result = sass.compile(scssFilename);

// OR

// Note that `compileAsync()` is substantially slower than `compile()`.
const result = await sass.compileAsync(scssFilename);

See the Sass website for full API documentation.

Legacy API

Dart Sass also supports an older JavaScript API that's fully compatible with Node Sass (with a few exceptions listed below), with support for both the render() and renderSync() functions. This API is considered deprecated and will be removed in Dart Sass 2.0.0, so it should be avoided in new projects.

Sass's support for the legacy JavaScript API has the following limitations:

  • Only the "expanded" and "compressed" values of outputStyle are supported.

  • Dart Sass doesn't support the precision option. Dart Sass defaults to a sufficiently high precision for all existing browsers, and making this customizable would make the code substantially less efficient.

  • Dart Sass doesn't support the sourceComments option. Source maps are the recommended way of locating the origin of generated selectors.

See Also

  • Dart Sass, from which this package is compiled, can be used either as a stand-alone executable or as a Dart library. Running Dart Sass on the Dart VM is substantially faster than running the pure JavaScript version, so this may be appropriate for performance-sensitive applications. The Dart API is also (currently) more user-friendly than the JavaScript API. See the Dart Sass README for details on how to use it.

  • Node Sass, which is a wrapper around LibSass, the C++ implementation of Sass. Node Sass supports the same API as this package and is also faster (although it's usually a little slower than Dart Sass). However, it requires a native library which may be difficult to install, and it's generally slower to add features and fix bugs.

Behavioral Differences from Ruby Sass

There are a few intentional behavioral differences between Dart Sass and Ruby Sass. These are generally places where Ruby Sass has an undesired behavior, and it's substantially easier to implement the correct behavior than it would be to implement compatible behavior. These should all have tracking bugs against Ruby Sass to update the reference behavior.

  1. @extend only accepts simple selectors, as does the second argument of selector-extend(). See issue 1599.

  2. Subject selectors are not supported. See issue 1126.

  3. Pseudo selector arguments are parsed as <declaration-value>s rather than having a more limited custom parsing. See issue 2120.

  4. The numeric precision is set to 10. See issue 1122.

  5. The indented syntax parser is more flexible: it doesn't require consistent indentation across the whole document. See issue 2176.

  6. Colors do not support channel-by-channel arithmetic. See issue 2144.

  7. Unitless numbers aren't == to unit numbers with the same value. In addition, map keys follow the same logic as ==-equality. See issue 1496.

  8. rgba() and hsla() alpha values with percentage units are interpreted as percentages. Other units are forbidden. See issue 1525.

  9. Too many variable arguments passed to a function is an error. See issue 1408.

  10. Allow @extend to reach outside a media query if there's an identical @extend defined outside that query. This isn't tracked explicitly, because it'll be irrelevant when issue 1050 is fixed.

  11. Some selector pseudos containing placeholder selectors will be compiled where they wouldn't be in Ruby Sass. This better matches the semantics of the selectors in question, and is more efficient. See issue 2228.

  12. The old-style :property value syntax is not supported in the indented syntax. See issue 2245.

  13. The reference combinator is not supported. See issue 303.

  14. Universal selector unification is symmetrical. See issue 2247.

  15. @extend doesn't produce an error if it matches but fails to unify. See issue 2250.

  16. Dart Sass currently only supports UTF-8 documents. We'd like to support more, but Dart currently doesn't support them. See dart-lang/sdk#11744, for example.

Disclaimer: this is not an official Google product.