Building a PostCSS Plugin to Clean and Modernize CSS

As CSS evolves, manual stylesheet maintenance becomes a bottleneck. PostCSS offers a powerful way to automate CSS transformations, but understanding how to write your own custom tooling can feel intimidating. This text-based course guides you through the foundational concepts of CSS processors, Abstract Syntax Trees (AST), and the PostCSS API. You will transition from writing manual CSS overrides to building automated JavaScript-based tooling that cleans up outdated vendor prefixes and modernizes your stylesheets. What you'll learn: - Understand the core concepts of CSS processing and Abstract Syntax Tree (AST) structures - Navigate and modify CSS nodes using the PostCSS API and modern JavaScript - Build a custom PostCSS plugin specifically designed to identify and remove obsolete vendor prefixes - Apply modern JavaScript features and clean code practices to write maintainable plugin code - Test your custom plugin using modern testing tools to ensure safe and predictable CSS transformations - Integrate your custom plugin into modern build workflows and development environments You will start by mastering foundational terminology and exploring how PostCSS parses CSS into an AST. From there, you will read through step-by-step implementations, analyzing code snippets to write, refine, and test your own functional prefix-removal plugin. This course is designed for frontend developers and web designers who have a basic understanding of CSS and JavaScript and want to learn how to build custom build-tooling. No prior experience with ASTs or compiler design is required. Start reading today to streamline your CSS workflow and master custom PostCSS plugin development.