Styling Approach
- sass:
sassis a CSS preprocessor that extends the capabilities of CSS by adding features like variables, nesting, mixins, and more. It compiles.scssor.sassfiles into standard CSS, making it compatible with all browsers while providing a more powerful syntax for writing styles. - styled-jsx:
styled-jsxis a CSS-in-JS library developed by Vercel for scoped styles in React components. It allows you to write CSS directly within your JSX, ensuring styles are scoped to the component, which helps prevent conflicts and makes it easier to manage styles in large applications. - @emotion/react:
@emotion/reactsupports both CSS-in-JS and traditional CSS class styling, allowing for greater flexibility in how styles are applied. It enables dynamic styling, theming, and supports media queries and pseudo-classes directly within JavaScript. - styled-components:
styled-componentsis a CSS-in-JS library that allows you to write actual CSS within your JavaScript files. It automatically scopes styles to components, preventing conflicts and enabling dynamic styling based on props. It also supports theming and global styles.
Theming Support
- sass:
sassdoes not provide built-in theming support, but you can create themes using variables and mixins. By defining a set of variables for each theme, you can switch themes by changing the variable values in your stylesheets. - styled-jsx:
styled-jsxdoes not have built-in theming support, but you can implement theming by passing props to your components and using them in your styles. This requires a more manual approach compared to other libraries. - @emotion/react:
@emotion/reactprovides robust theming support out of the box. It allows you to create a theme object and use it throughout your styled components, making it easy to implement consistent styling across your application. - styled-components:
styled-componentshas excellent theming support. It provides aThemeProvidercomponent that allows you to define a theme and access it within your styled components using thepropsargument, enabling dynamic theming with minimal effort.
Bundle Size
- sass:
sassis a preprocessor that compiles to CSS, so it does not add any runtime overhead to your application. However, the size of the generated CSS files depends on how you structure your styles and the features you use. - styled-jsx:
styled-jsxis lightweight and adds minimal overhead to your application. It is designed to be efficient, especially for projects using Next.js, where it can take advantage of server-side rendering to optimize style delivery. - @emotion/react:
@emotion/reactis known for its small bundle size, especially when using the@emotion/reactpackage alone. It is designed to be performant and lightweight, making it a great choice for applications where load time is a concern. - styled-components:
styled-componentshas a larger bundle size compared to some other CSS-in-JS libraries due to its runtime styling capabilities. However, the size is justified by its features, such as automatic style scoping and theming support.
Code Example
- sass:
// styles.scss $primary-color: blue; $secondary-color: green; .button { background-color: $primary-color; color: white; &:hover { background-color: $secondary-color; } } - styled-jsx:
const Component = () => ( <div> <p>Styled with styled-jsx</p> <style jsx>{` p { color: blue; &:hover { color: green; } } `}</style> </div> ); - @emotion/react:
/** @jsxImportSource @emotion/react */ import { css } from '@emotion/react'; const style = css` color: hotpink; &:hover { color: blue; } `; const Component = () => <div css={style}>Hover me!</div>; - styled-components:
import styled from 'styled-components';
const Button = styled.button
background-color: blue; color: white; &:hover { background-color: green; };const App = () => ;
