What is css-modules-loader-core?

CSS Modules Loader Core is a tool that helps developers keep their CSS styles from accidentally clashing with each other. When you are building a website, you might name a button class something generic like "button" in your CSS, and that name might collide with another "button" style somewhere else in the project. This tool solves that problem by automatically renaming your classes into unique, scrambled names so there is no risk of overlap, even if two different files use the exact same class name. The tool takes your raw CSS code, reads through it, and looks for any other style files you are importing. It merges everything together into one final, clean block of CSS. Along the way, it also generates a map that connects your original, simple class names to the new unique names it created. This map lets your application know exactly which scrambled name to use when you reference your simple class name in your code. This is built for people creating custom build tools or plugins for web development frameworks. For example, if a developer is building a new system that bundles code for a web application, they would use this tool behind the scenes to handle the CSS part of that process. It is designed to be "loader-agnostic," meaning it doesn't lock you into a specific build system like Webpack, instead, you can plug it into whatever custom setup you are building. One notable feature is that it is built on top of PostCSS, which is a popular engine for transforming CSS. By default, it applies the standard CSS Modules rules, but it also lets developers swap those defaults out. If a developer needs to add extra CSS processing, like automatically adding browser prefixes to new style features, they can easily insert those additional steps into the pipeline.