What is Sass?

Sass is an abbreviation of Syntactically Awesome Style Sheets. It is a special kind of stylesheet language known as a preprocessor scripting language that extends the default capabilities of CSS. This enables you to use JavaScript-like logic and features in the code, such as variables, nesting, mixins, inheritance, partials, functions, mathematical operations, and more. All of this helps you write more robust and maintainable code by automating repetitive tasks, reducing the number of errors, creating reusable code snippets, and more. Sass has a syntax similar to CSS, but the Sass files need to be compiled to regular CSS before they can be rendered in browsers. This can be done using different tools, which we will learn more about later in this chapter.

Sass was first released in 2006 and is still being actively supported and developed by a large community. It is by far the most popular and used CSS preprocessor, with Less and Stylus being two other established CSS...