LESS - Duplication Detection

Description

It cannot detect the duplication of selectors.

Example

The following example demonstrates the use of duplication detection in the LESS file −

extend_syntax.htm

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

   <body>
      <div class = "cont-main">
         <p>Welcome to TutorialsPoint</p>
         <div class = "style">
            <ul>
               <li>SASS </li>
               <li>LESS</li>
            </ul>
         </div>
      </div>
   </body>
</html>

Next, create the style.less file.

style.less

.cont-main,
.style {
   font-family: "Comic Sans MS";
   font-size: 30px;
}

.cont-main {
   font-size: 30px;
}
.cont:extend(.cont-main, .style) {}

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-main,
.style,
.cont,
.cont {
   font-family: "Comic Sans MS";
   font-size: 30px;
}

.cont-main,
.cont {
   font-size: 30px;
}

Output

Follow these steps to see how the above code works −

  • Save the above html code in the extend_syntax.htm file.

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

Less Extend
less_extend.htm
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