Sass is a CSS preprocessor that extends CSS syntax with features like variables, mixins, and nesting. Here is an example of Sass syntax:

$primary-color: #258abc;

body {
  background: $primary-color;
  color: darken($primary-color, 20%);
}

Example

$font-stack: Helvetica, sans-serif;
$primary-color: #333;

body {
  font: 100% $font-stack;
  color: $primary-color;
}

a {
  color: $primary-color;
  &:hover {
    color: darken($primary-color, 20%);
  }
}

Output

The output of the above Sass code would be the following CSS:

body {
  font: 100% Helvetica, sans-serif;
  color: #333;
}

a {
  color: #333;
}

a:hover {
  color: #191919;
}

Explanation

The above Sass code defines two variables: $font-stack and $primary-color. The body and a selectors use these variables to define the font family and colors. The &:hover selector targets the hover state of the a selector and uses the darken() function to darken the primary-color variable by 20%.

Use

Sass is commonly used for web development to make writing CSS faster, easier, and more maintainable. It can be used with any web development workflow and integrated into various build tools and frameworks.

Important Points

Here are some important things to keep in mind when using Sass:

• Sass is a preprocessor, which means it needs to be compiled into CSS before it can be used on the web
• Sass extends CSS syntax with additional features, but it still needs to follow the basic rules of CSS
• Sass includes various functions, mixins, and modules that can make writing CSS more efficient and maintainable

Summary

Sass is a CSS preprocessor that extends CSS syntax by adding new features like variables, mixins, and nesting. It can be used to make CSS more efficient and maintainable. Sass needs to be compiled into CSS before it can be used on the web and follows basic CSS syntax rules with new add-ons. It helps in the web development process and can be integrated into different tools and frameworks.