Stylus
Stylus is a CSS preprocessor that extends CSS with dynamic features such as variables, mixins, functions, and nesting, allowing developers to write more maintainable and efficient stylesheets. It compiles into standard CSS and supports a flexible, indentation-based syntax that omits braces and semicolons, making code cleaner and easier to read. Stylus is often used in web development projects to streamline styling workflows and enhance CSS capabilities.
Developers should learn Stylus when working on large-scale web applications where CSS maintenance becomes cumbersome, as it offers features like variables for consistent theming and mixins for reusable code blocks. It is particularly useful in projects using Node.js or build tools like Webpack, where it can be integrated into the build process to automate CSS compilation. Stylus is also beneficial for teams preferring a minimalist syntax, as its indentation-based style reduces boilerplate and improves readability compared to traditional CSS.