Head-to-Head: JSS vs Windi CSS Analysis


v10.10.0(8 months ago)

This package is actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 4Monthly npm downloads

JSS is a powerful and flexible JavaScript library for styling your applications. It provides a way to write CSS styles in JavaScript, allowing you to create dynamic and reusable stylesheets. With JSS, you can define styles as JavaScript objects or use CSS syntax with the help of a CSS-in-JS compiler.

Alternatives: styled-components, emotion, aphrodite

Tags: javascriptstylingcss-in-jsdynamic-stylescomponent-styling


v3.5.6(over 1 year ago)

This package was last published over a year ago. It may not be actively maintained.Types definitions are bundled with the npm packageNumber of direct dependencies: 0Monthly npm downloads

Windi CSS is a modern utility-first CSS framework that provides classes for designing pages quickly. It offers an intuitive syntax with over 250 built-in utilities for colors, typography, spacing, and more. The framework has a small footprint and can work independently or alongside other CSS frameworks.

Alternatives: Tailwind CSS, Bootstrap, Bulma, Materialize

Tags: cssutilityframeworkresponsivestreamlined



JSS has been around for longer and has gained popularity within the React ecosystem. It is widely used and has a large community following. WindiCSS, on the other hand, is relatively newer but has been gaining popularity quickly in the front-end development community, especially among developers using utility-first CSS approaches.

CSS Paradigm

JSS is a CSS-in-JS library that allows you to write CSS styles directly in your JavaScript code. It provides a JavaScript API for defining styles and handles the CSS generation and injection at runtime. WindiCSS, on the other hand, is a utility-first CSS framework that focuses on providing a set of utility classes for easy and declarative styling. It does not require JavaScript integration and can be used with any front-end framework or library.


JSS is primarily designed for integration with React and React-like frameworks. It provides a seamless experience for styling React components with CSS-in-JS. WindiCSS, on the other hand, is framework-agnostic and can be used with any JavaScript framework or library. It provides utility classes that can be used directly in HTML templates or combined with other CSS frameworks.

Bundle Size

JSS uses a runtime stylesheet generation approach which can result in larger bundle sizes compared to traditional CSS or pre-compiled CSS-in-JS solutions. WindiCSS, being a utility-first CSS framework, generates highly optimized and tree-shakable CSS by analyzing your HTML templates, leading to smaller bundle sizes and improved performance.

Developer Experience

JSS provides a powerful API for defining and manipulating styles directly in JavaScript. It offers features like dynamic theming, media queries, and nesting of styles. With JSS, you have full control over the styles and can programmatically modify them. WindiCSS, on the other hand, focuses on simplicity and ease of use. It allows you to write styles using utility classes, making it quick and efficient to style your components without the need for additional CSS or JavaScript code.

Community and Ecosystem

JSS has a mature and established ecosystem within the React community. It has plugins and integrations with popular libraries and frameworks like React, Next.js, and Material-UI. WindiCSS, being relatively newer, has a growing community but may have a smaller ecosystem and fewer integrations compared to JSS.