In jQuery, index selectors are used to select elements based on their position or index within a set of elements. The following are some commonly used index selectors in jQuery:

1. :eq(index) - Selects the element at the specified index within the set of matched elements. For example, $(“li:eq(2)”) selects the third

2. element.

3. :first - Selects the first element in the set of matched elements. For example, $(“li:first”) selects the first

4. element.

5. :last - Selects the last element in the set of matched elements. For example, $(“li:last”) selects the last

6. element.

7. :odd - Selects odd-indexed elements within the set of matched elements. For example, $(“li:odd”) selects all the

8. elements at odd positions.

9. :even - Selects even-indexed elements within the set of matched elements. For example, $(“li:even”) selects all the

10. elements at even positions.

11. :lt(index) - Selects all elements at an index less than the specified index within the set of matched elements. For example, $(“li:lt(2)”) selects the first and second

12. elements.

13. :gt(index) - Selects all elements at an index greater than the specified index within the set of matched elements. For example, $(“li:gt(2)”) selects all

14. elements starting from the third position.

These index selectors can be combined with other selectors, such as class or attribute selectors, to narrow down the selection of elements. For example, $(“ul li:first-child”) selects the first

element within each

element.

Overall, jQuery index selectors provide a flexible and powerful way to select elements based on their position within a set of elements, making it easy to manipulate and traverse DOM structures.