Sass - Variable Defaults


You can set the default values for variables by adding !default flag to the end of the variable value. It will not re-assign the value, if it is already assigned to the variable.


The following example demonstrates the use of variable defaults in the SCSS file −

      <title>Variable Defaults</title>
      <link rel = "stylesheet" type = "text/css" href = "style.css" />
      <link rel = "stylesheet" href = "">
      <script src = ""></script>
      <script src = ""></script>

      <div class = "container">
         <h2>Example using Variable Defaults</h2>
         <p>Sass is an extension of CSS that adds power and elegance to the basic language..</p>

Next, create file style.scss.


$myval1: null;
$myval1: "Sass Developed by Natalie Weizenbaum and Chris Eppstein" !default;

p:after {
   content: $myval1;

You can tell SASS to watch the file and update the CSS whenever SASS file changes, by using the following command −

sass --watch C:\ruby\lib\sass\style.scss:style.css

Next, execute the above command; it will create the style.css file automatically with the following code −


p:after {
   content: "Sass Developed by Natalie Weizenbaum and Chris Eppstein";


Let us carry out the following steps to see how the above given code works −

  • Save the above given html code in var_defaults.html file.

  • Open this HTML file in a browser, an output is displayed as shown below.

Sass Variable Defaults