.eq()
Reduce the set of matched elements to the one at the specified index.
.eq(index)🡢 jQuery
index
| Integer | An integer indicating the 0-based position of the element. |
.eq(indexFromEnd)🡢 jQuery
indexFromEnd
| Integer | An integer indicating the position of the element, counting backwards from the last element in the set. |
Given a jQuery object that represents a set of DOM elements, the .eq() method constructs a new jQuery object from one element within that set. The supplied index identifies the position of this element in the set.
Consider a page with a simple list on it:
<ul>
<li>list item 1</li>
<li>list item 2</li>
<li>list item 3</li>
<li>list item 4</li>
<li>list item 5</li>
</ul>
We can apply this method to the set of list items:
$("li").eq(2).css("background-color", "red");
The result of this call is a red background for item 3. Note that the supplied index is zero-based, and refers to the position of the element within the jQuery object, not within the DOM tree.
Providing a negative number indicates a position starting from the end of the set, rather than the beginning. For example:
$("li").eq(-2).css("background-color", "red");
This time list item 4 is turned red, since it is two from the end of the set.
If an element cannot be found at the specified zero-based index, the method constructs a new jQuery object with an empty set and a length property of 0.
$("li").eq(5).css("background-color", "red");
Here, none of the list items is turned red, since .eq( 5 ) indicates the sixth of five list items.
Turn the div with index 2 blue by adding an appropriate class.
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
div {
width: 60px;
height: 60px;
margin: 10px;
float: left;
border: 2px solid blue;
}
.blue {
background: blue;
}
$("body").find("div").eq(2).addClass("blue");