SASS (short for "Syntactically Awesome Style Sheets") is a CSS preprocessor. A CSS preprocessor is a tool that allows you to write styles for your website using a special syntax that is then compiled into regular CSS that can be used in a web browser.
SASS is a variation of the original SASS syntax, and it uses indentation and does not use curly braces or semicolons. It allows you to use features such as variables, nested selectors, mixins, and other features that make it easier to write and maintain CSS styles. SASS also supports features such as functions and loops, which are not present in regular CSS.
Here is an example of SASS syntax:
$font-stack: Helvetica, sans-serif $primary-color: #333 body font: 100% $font-stack color: $primary-color
In this example, we define two variables: $font-stack, which holds the value of a font stack, and $primary-color, which holds the value of a color. We then use these variables in the body selector to set the font and color of the body element.
SASS is required when you want to use features that are not available in regular CSS, such as variables and mixins. It is particularly useful when you are working on a large or complex project and need to reuse styles or customize them for different environments or devices.
To use SASS, you need to install a SASS compiler, such as node-sass or sass-loader, and configure your build process to compile your SASS files into CSS files. You can then include the generated CSS files in your HTML files using the link element.
I hope this helps to give you an understanding of what SASS is and why it is useful! Let me know if you have any questions or need further assistance.