What are CSS frameworks?

CSS frameworks are collections of pre-prepared libraries that streamline the web development process by providing reusable components. These frameworks typically include a set of standardized styles, grids, and other UI elements that developers can use to create a cohesive and responsive design more efficiently.

By utilizing a CSS framework, developers can save time and effort, as they do not have to write all the CSS styles from scratch. Instead, they can leverage the framework’s pre-defined styles and components, which can be easily customized to fit the needs of their project. This leads to improved consistency across web pages, enhanced maintainability, and often a faster development cycle.

Other options do not accurately describe CSS frameworks: They are not primarily tools for debugging code, nor are they standards for writing semantic HTML, or specifically libraries for creating animations. Each of those items serves a different purpose in the web development ecosystem. Thus, the role and definition of CSS frameworks are best captured by the idea of them being libraries that promote efficiency in web design through reusable components.