⚡ CSS JavaScript Libraries

JavaScript CSS libraries allow developers to manage and enhance Cascading Style Sheets through JavaScript-based logic.

They typically support dynamic styling, theming, responsive behavior handling, CSS preprocessing or polyfills, animation control, and runtime style updates to improve flexibility and cross-browser consistency.

Statistics based on 3.5M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading CSS JavaScript libraries in 2026, based on market share.

The most popular is Less.js with a share of 0.5%, followed by Emotion with 0.4% and Styled Components with 0.4%.

✨ Best CSS JavaScript Libraries

Below is a more detailed list of 11 CSS JavaScript libraries we detect, ranked by their market share.

Available filters: 2D-Graphics 3D-Graphics Animation Carousel CSS Data Grids DOM Editors Lightbox Scroll SPA State Utility UI
RankNameMarket share
1
Less.js

A JavaScript library that converts Less styles to CSS styles.

FreeOpen source
2
Emotion

An open-source CSS-in-JS library for writing and managing styles with JavaScript and TypeScript that can be used both with React and in a framework-agnostic way.

FreeOpen source
3
Styled Components
Hadley, Massachusetts, United States

An open-source CSS-in-JS library for React that allows developers to define component styles directly within JavaScript and TypeScript code.

FreeOpen source
4
Enquire.js

A lightweight, pure JavaScript library for responding to CSS media queries.

FreeOpen source
5
css-vars-ponyfill

Client-side support for CSS custom properties (aka "CSS variables") in legacy and modern browsers.

FreeOpen source
6
Critters
San Francisco, California, United States

A deprecated Webpack plugin that inlines your app's critical CSS and lazily loads the rest.

FreeOpen sourceLegacy
7
Animsition

A simple jQuery plugin for CSS animated page transitions.

FreeOpen source
8
StyleX
Menlo Park, California, United States

An open-source styling system and CSS-in-JS library developed by Meta for building and maintaining large-scale web applications.

FreeOpen source
9
Prefix-free

A legacy script that adds browser prefixes to CSS code when needed for old browsers.

FreeOpen sourceLegacy
10
Beasties
Edinburgh, United Kingdom

A plugin that inlines your app's critical CSS and lazy-loads the rest.

FreeOpen source
11
Motion UI
Campbell, California, United States

A Sass library for creating flexible CSS transitions and animations.

FreeOpen source

👉 See Also

🗃️ About This Data