The index() is an inbuilt method in jQuery which is used to return the index of the a specified elements with respect to selector.
Syntax:
$(selector).index(element)
Parameter: It accepts an optional parameter “element” which is used to get the position of the element.
Return value: It returns an integer denoting the index of the specified element.
Code #1:
<!DOCTYPE html> <html>
<head>
<script </script>
<script>
<!--jQuery code to demonstrate index function -->
// document ready
$(document).ready(function() {
// if the list is clicked
$("li").click(function() {
// index()
// to return the index of the clicked
// element of the list
document.getElementById("demo").innerHTML = "Clicked Index "
+ $(this).index();
});
});
</script>
</head>
<body>
<p>Click on the elements of the list to display their index
number with respect to the other elements in the list.</p>
<ul>
<li>Geeks</li>
<li>for</li>
<li>Geeks</li>
</ul>
<p id="demo"></p>
</body>
</html>
|
Output:
Before clicking on any element on the list
Click on the elements of the list to display their index number with respect to the other elements in the list.
- Geeks
- for
- Geeks
After clicking on “for”-
Click on the elements of the list to display their index number with respect with the other elements in the list.
- Geeks
- for
- Geeks
Code #2:
<!DOCTYPE html> <html>
<head>
<script </script>
<script>
<!--jQuery code to demonstrate index function -->
// document ready
$(document).ready(function() {
// if the list is clicked
$("li").click(function() {
// index()
// to return the index of the clicked
// element of the list
document.getElementById("demo").innerHTML = "Clicked Index "
+ $($(".myclass")).index($("#id"));
});
});
</script>
</head>
<body>
<p>Click on the elements of the list to display their index
number with respect with the other elements in the list.</p>
<ul>
<li>Geeks</li>
<li class="myclass">for</li>
<li class="myclass" id="id">Geeks</li>
</ul>
<p id="demo"></p>
</body>
</html>
|
Output:
Before clicking on any element on the list-
Click on the elements of the list to display their index number with respect with the other elements in the list.
- Geeks
- for
- Geeks
After clicking on any element of the list-
Click on the elements of the list to display their index number with respect with the other elements in the list.
- Geeks
- for
- Geeks