jss is a popular library for CSS-in-JS styling in JavaScript applications. It allows developers to write CSS styles using JavaScript objects, providing a dynamic and modular approach to styling components. JSS is particularly useful for applications that require a high level of customization and theming, as it enables styles to be generated at runtime based on props or application state. Its flexibility and integration with various frameworks make it a solid choice for modern web development.

However, there are several alternatives to JSS that also provide CSS-in-JS solutions. Here are a couple of notable options:

• emotion is a highly performant and flexible CSS-in-JS library that allows developers to style applications using template literals or object notation. It offers powerful features like theming, automatic vendor prefixing, and server-side rendering support. Emotion is designed to work seamlessly with React and can be easily integrated into existing projects. Its focus on performance and developer experience makes it a popular choice for styling React applications, especially when you need both flexibility and speed.

• styled-components is another widely-used CSS-in-JS library that enables developers to write actual CSS code within JavaScript files. It utilizes tagged template literals to create styled components, allowing for a clean and intuitive syntax. Styled-components automatically handle vendor prefixes and support theming, making it easy to create reusable and maintainable styles. Its popularity stems from its simplicity and the ability to scope styles to components, preventing style conflicts in larger applications.

To see how JSS compares with Emotion and Styled-components, check out the comparison: Comparing emotion vs jss vs styled-components.