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Sass: Nested Properties

Using nested properties, you can avoid rewriting CSS multiple times. For instance, use font as namespace, which uses some properties such as font-family, font-size, font-weight and font-variant. In normal CSS, you need to write these properties every time with namespace. Using SASS, you can nest the properties by writing the namespace only once.

Example​

Example of nested properties in a SCSS file:

<html>
   <head>
      <title>Nested Properties</title>
      <link rel="stylesheet" type="text/css" href="style.css" />
      <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
      <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
   </head>

   <body>
      <div class="container">
         <h1>Example using Nested Properties</h1>
         <p class="line">SASS stands for Syntactically Awesome Stylesheet</p>
      </div>
   </body>
</html>

and the style.scss file:

.line {
   font: {
      family: Lucida Sans Unicode;
      size:20px;
      weight: bold;
      variant: small-caps;
   }
}

Then you tell Sass to watch the file and update the CSS when the file changes:

sass --watch my\path\style.scss:style.css

The generated style.css files is as shown below:

.line {
   font-family: Lucida Sans Unicode;
   font-size: 20px;
   font-weight: bold;
   font-variant: small-caps;
}

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