How to get child element by index in Jquery?

<div class="second">
    <div class="selector" id="selFirst"></div>
    <div class="selector" id="selSecond"></div>
    <div></div>
</div>

How to get #selFirst using element index not the ID?

this:

var $selFirst = $(".second:nth-child(1)");
console.log($selFirst);

is returning :

jQuery(div.second)

Solution 1:

If you know the child element you're interested in is the first:

 $('.second').children().first();

Or to find by index:

 var index = 0
 $('.second').children().eq(index);

Solution 2:

There are the following way to select first child

1) $('.second div:first-child')

2) $('.second *:first-child')

3) $('div:first-child', '.second')

4) $('*:first-child', '.second')

5) $('.second div:nth-child(1)')

6) $('.second').children().first()

7) $('.second').children().eq(0)

Solution 3:

You can get first element via index selector:

$('div.second div:eq(0)')

Code: http://jsfiddle.net/RX46D/