CSS Preprocessors

CSS Preprocessors like SASS (Syntactically Awesome Stylesheets) and LESS are tools that extend the capabilities of standard CSS by introducing features like variables, mixins, functions, and nested rules. These enhancements help developers write cleaner, more maintainable, and DRY (Don’t Repeat Yourself) stylesheets—especially beneficial in large-scale projects.

Preprocessors compile their extended syntax down to plain CSS that browsers can understand, bridging the gap between developer ergonomics and runtime compatibility.

Key Features of CSS Preprocessors:

Variables: Store values like colors, spacing, or font sizes to reuse across stylesheets.

 scssCopyEdit$primary-color: #4a90e2;
body { color: $primary-color; }

Nesting: Reflect HTML structure in your styles, making the code more intuitive.

 scssCopyEditnav {
  ul {
    li {
      a { text-decoration: none; }
    }
  }
}

Mixins: Reusable blocks of styles that can be included in multiple selectors.

 scssCopyEdit@mixin flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

• Functions & Operations: Perform calculations or manipulate values (e.g., darken(), lighten(), +, -).
  
  

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