LESS - Mixin scope


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Description

Mixins consisting of variables are visible and can be used in caller's scope. But there is one exception, if the caller contains a variable with the same name, then that variable is not copied into the caller's scope. Only the variables inside the caller’s scope are protected and the inherited variables are overridden.

Example

The following example demonstrates the use of mixin scope in the LESS file −

<html>
   <head>
      <link rel = "stylesheet" href = "style.css" type = "text/css" />
      <title>Mixins Scope</title>
   </head>

   <body>
      <div class = "myclass">
         <h2>Welcome to Tutorialspoint</h2>
         <p>LESS is a CSS pre-processor that enables customizable, 
            manageable and reusable style sheet for web site.</p>
      </div>
   </body>
</html>

Next, create the style.less file.

style.less

.mixin() {
   @bgcolor: #C0C0C0;
}

.myclass{
   .mixin();
   background-color: @bgcolor;
}

You can compile the style.less 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

.myclass {
   background-color: #C0C0C0;
}

Output

Follow these steps to see how the above code works −

  • Save the above html code in the less_mixin_as_function_scope.html file.

  • Open this HTML file in a browser, the following output will get displayed.

LESS Mixin Scope

Variables cannot be overridden in the callers scope when they are defined directly in it. For more information click here.

less_mixins_as_functions.htm
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