Guide to removing unused CSS code with PurgeCSS

PurgeCSS is a tool designed to optimize web applications by removing unused CSS, which can accumulate when using frameworks like Tailwind CSS and Bootstrap. This accumulated unused code can lead to larger file sizes and slower performance. PurgeCSS works by analyzing both the content and CSS files to identify and eliminate unused styles, thereby reducing file size and enhancing site performance. It is especially useful for production builds and integrates well with popular JavaScript libraries and frameworks such as React and Vue.js. The tool is praised for its modularity, ease of use, and extensive customization options, allowing developers to tailor its functionality to their specific needs. With over 900,000 weekly downloads on npm, PurgeCSS is widely adopted in the developer community, offering features like safe lists and the ability to manage keyframes, font faces, and CSS variables.