LESS - Definition and Caller Scope Visibility

Description

Variables and mixins are defined inside the detached ruleset.

Example

The following example demonstrates the use of variable and mixin defined inside the ruleset in the LESS file −

passing_ruleset.htm

<!doctype html>
   <head>
      <link rel = "stylesheet" href = "style.css" type = "text/css" />
   </head>

   <body>
      <div class = "cont">
         <h2>Welcome to TutorialsPoint</h2>
         <p>The largest Tutorials Library on the web.</p>
      </div>
   </body>
</html>

Next, create the style.less file.

style.less

@detached-ruleset: {
   background-color: @caller-variable;
   .caller-mixin();
};

.cont {
   @detached-ruleset();

   @caller-variable: #AA86EE;
   .caller-mixin() {
      font-style:italic;
   }
}

You can compile the style.less file to style.css by using the following command −

lessc style.less style.css

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

style.css

.cont {
   background-color: #AA86EE;
   font-style: italic;
}

Output

Follow these steps to see how the above code works −

Save the above html code in the passing_ruleset.htm file.
Open this HTML file in a browser, the following output will get displayed.

passing_rulesets_to_mixins.htm