jQuery Examples - filter( fn ) Method

Quiz

Description

The filter( fn ) method filters all elements from the set of matched elements that do not match the specified function.

Syntax

Here is the simple syntax to use this method −

selector.filter( selector )

Parameters

Here is the description of all the parameters used by this method −

fn − The function is called with a context equal to the current element just like $.each. If the function returns false, then the element is removed otherwise the element is kept.

Example

Following is an example showing a simple usage of this method −

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").filter(function (index) {
               return index == 1 || $(this).attr("class") == "middle";
            }).addClass("selected");
         });
      </script>
		
      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>
      <div>
         <ul>
            <li class = "top">list item 1</li>
            <li class = "top">list item 2</li>
            <li class = "middle">list item 3</li>
            <li class = "middle">list item 4</li>
            <li class = "bottom">list item 5</li>
            <li class = "bottom">list item 6</li>
         </ul>
      </div>
   </body>
</html>

This will produce following result −

<html>
   <head>
      <title>The jQuery Example</title>
      <script type = "text/javascript" 
         src = "https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
		
      <script type = "text/javascript" language = "javascript">
         $(document).ready(function() {
            $("li").filter(function (index) {
               return index == 1 || $(this).attr("class") == "middle";
            }).addClass("selected");
         });
      </script>

      <style>
         .selected { color:red; }
      </style>
   </head>
	
   <body>	
      <div>
         <ul>
            <li class = "top">list item 1</li>
            <li class = "selected">list item 2</li>
            <li class = "selected">list item 3</li>
            <li class = "selected">list item 4</li>
            <li class = "bottom">list item 5</li>
            <li class = "bottom">list item 6</li>
         </ul>
      </div>
   </body>
</html>

This will produce following result −

jqueryexamples_traversing.htm

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