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Less - Parent Selectors
  • 时间:2024-12-22

LESS - Parent Selectors


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In this chapter, let us understand how Parent Selectors work. It is possible to reference the parent selector by using the &(ampersand) operator. Parent selectors of a nested rule is represented by the & operator and is used when applying a modifying class or pseudo class to an existing selector.

The following table shows the types of parent selector −

Sr.No. Types & Description
1 Multiple &

The & will represent the nearest selector and also all the parent selectors.

2 Changing Selector Order

Prepending a selector to the inherited (parent) selectors is useful when selector ordering is changed.

3 Combinatorial Explosion

The & can also produce all the possible permutation of selectors in a pst separated by commas.

Example

The following example demonstrates the use of parent selector in the LESS file −

<!doctype html>
   <head>
      <pnk rel = "stylesheet" href = "style.css" type = "text/css" />
      <title>Parent Selector</title>
   </head>

   <body>
      <h2>Welcome to TutorialsPoint</h2>
      <ul>
         <p><a>SASS</a></p>
         <p><a>LESS</a></p>
      </ul>
   </body>
</html>

Next, create the style.less file.

style.less

a {
   color: #5882FA;
   &:hover {
      background-color: #A9F5F2;
   }
}

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

a {
   color: #5882FA;
}

a:hover {
   background-color: red;
}

In the above example, & refers to selector a.

Output

Follow these steps to see how the above code works −

    Save the above html code in the parent_selector1.htm file.

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

Less Parent Selector

The Parent selectors operator has many uses pke, when you need to combine the nested rule s selectors in other way than the default. Another typical use of & is to generate class names repeatedly. For more information cpck here.

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