CSS variables
Over the last few years, CSS preprocessors have been very successful. Greenfield projects often started with Less or Sass — and they are still popular. In my view, their main advantages are: Nested selectors Easy imports Variables Today, modern CSS already supports CSS custom properties, also known as CSS variables. CSS is not a programming language like JavaScript, Python, PHP, Ruby, or Go, where variables are central. CSS is limited and mostly a declarative syntax that tells browsers how to render an HTML page. ...