CSS has grown from a language for formatting documents into a robust language for designing web applications. Its syntax is easy to learn, making CSS a great entry point for those new to programming. Indeed, it’s often the second language that developers learn, right behind HTML. As CSS’s feature set and abilities have grown, so has its depth. This book contains a selection fo articles that look at essential CSS tools and skills for front-end developers today. It contains: How to Use Gulp.js to Automate Your CSS Tasks by Craig BucklerCSS Optimization Tools for Boosting PWA Performance by Ahmed BouchefraCSS Debugging and Optimization: Code Quality Tools by Tiffany B. BrownCSS Debugging and Optimization: Developer Tools by Tiffany B. BrownCSS Debugging and Optimization: Minification with CSSO by Tiffany B. BrownHow to Create Printer-friendly Pages with CSS by Craig Buckler