.eq() | JQuery API Documentation

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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:

1 2 3 4 5 6 7 <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:

1 $( "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:

1 $( "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.

1 $( "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.

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