jQuery eq() function

a not well known trick on jquery eq() function

As the jQuery documentation says the eq(index) function

Reduce the set of matched elements to the one at the specified index

Using this function you can easily select an object from a set of them.

for example:

$(‘li’).eq(2).hide();

simply select the second li and set it to hide.

But the eq() function has another powerful usage.

Let’s say that you have a collection of some elements and you need to select the penultimate of them. With eq() you can simply write:

$(‘li’).eq(-2)

to select the right element.

Providing a negative index number indicates a position starting from the end of the set.

for more detailed information check the official documentation.