jQuery Traversing Filtering

jQuery Web Development Front End Technology

Filtering methods in jQuery include eq(), filter(), not(), etc. Let us see some of them here−

not() method

The not() method in jQuery is used to return elements that do not match specific criteria.

Example

Let us see an example to implement the jQuery not() method−

Live Demo

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
   $(document).ready(function(){
      $("button").click(function(){
         $("h2").not(".demo").css("color", "orange");
      });
   });
</script>
<style>
h2 {
color: blue;
}
</style>
</head>
<body>
<h2>Student Info</h2>
<p>This is a demo text.</p>
<h2 class="demo">Exam Info</h2>
<p>This is a demo text.</p>
<h2 class="demo">Teacher's Info</h2>
<p>This is a demo text.</p>
<button>Click me</button>
</body>
</html>

Output

This will produce the following output−

Now, click the “Click me” to update the text color of the element that do not match specific criteria−

eq() method

The eq() method in jQuery is used to select an element with a specific index number. The index number begins at 0.

Syntax

The syntax is as follows −

$(":eq(index)")

Above, the parameter index is the index of the element.

Example

Let us now see an example to implement the jQuery eq() method−

Live Demo

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
   $(document).ready(function(){
      $("button").click(function(){
         $("p:eq(2)").css("color", "orange");
      });
   });
</script>
</head>
<body>
<h2>Student Info</h2>
<p>This is a demo text.</p>
<h2>Exam Info</h2>
<p>This is a demo text.</p>
<h2>Teacher's Info</h2>
<p>This is a demo text.</p>
<button>Click me</button>
</body>
</html>