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jQuery Traversing Filtering
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−
<!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−
<!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>
Output
This will produce the following output−
Click “Click me” to change the heading color of a specific heading−
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