A CSS preprocessor is a program that lets you generate CSS from the preprocessor’s own unique syntax. There are many CSS preprocessors to choose from, however, most CSS preprocessors will add some features that don’t exist in pure CSS, such as mixin, nesting selector, inheritance selector, and so on. These features make the CSS structure more readable and easier to maintain.

Some Popular CSS Preprocessors:

  • SASS/SCSS: It is the oldest CSS preprocessor and an extension of CSS. Sass stands for Syntactically awesome style sheets. It also helps to keep things organized and allows you to create style sheets faster. It is completely compatible with all versions of CSS. Sass is written in Ruby, and originally it also needed Ruby to compile the code, which deterred many developers from using it.

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