Select first child's children with Jquery

Question

I have a html structure like this:

<div class="one">
  <div id="two">
    <h2>Any</h2>
    <h4>Any</h4>
  </div>
  <div id="three">
  </div>
</div>

I have to select the first and the first's children elements, in the above case: #two, h2, h4, without knowing the first element's id name. How could I do that?

I can select the first element but if I add contents().find() to div:first I can't select its children:

$(document).ready(function() {
    $(".one").mouseover(function () {  
        $(this).children('div:first').contents().find('h2,h4').stop(true, true).fadeIn('fast');
     });

    $(".one").mouseout(function () { 
        $(this).children('div:first').contents().find('h2,h4').stop(true, true).fadeOut('fast');
    });
});

The final and working (no flicker!) code is:

$(".one").hover(function () {  
$(this).children('div:first').stop(true, true).fadeIn('fast');
}, function() {;
$(this).children('div:first').stop(true, true).fadeOut('fast');
});

I guess I have to give myself more time to think before coming here and asking questions. Anyway, I learned about .andSelf() and the a bit of Jquery syntax. Thanks again.

Answer 1

You don't need to use both find() and contents() - Try this:

$(document).ready(function() {
    $(".one").mouseover(function () {  
        $(this).children('div:first').children('h2,h4').stop(true, true).fadeIn('fast');
     });

    $(".one").mouseout(function () { 
        $(this).children('div:first').children('h2,h4').stop(true, true).fadeOut('fast');
    });
});

And if you need to also keep the 'first' element in the nodeset, use .andSelf() after the second .children() (as per @Felix 's answer).

Answer 2

You can use children ^[docs] and andSelf ^[docs]:

$(".one").mouseover(function () {  
    $(this).children().first().children('h2, h4').andSelf()....
});

If you don't want to add the first child (the parent) to the set, omit andSelf. Your question is a bit vague in this point. But I assume you actually don't want to select the first child, only its children. If you hide an element, its children are hidden too.