Unlike compiled languages, in PHP if you make a mistake, the program will crash when the line of code with the mistake is executed. When testing a PHP application, whether manually or automatically, developers spend a lot of their time discovering mistakes that wouldn’t even compile in other languages, leaving less time for testing actual business logic.
PurgeCSS is a tool to remove unused CSS. When you are building a website, you might decide to use a CSS framework like TailwindCSS, Bootstrap, MaterializeCSS, Foundation, etc... You will only use a small set of the framework but a lot of unused CSS styles will be included.
PurgeCSS analyzes your content and your CSS files. Then it matches selectors used in your files with the ones in your content files. It removes unused selectors from your CSS, resulting in smaller CSS files. PurgeCSS comes with a JavaScript API, a CLI and plugins for popular build tools.
