Question

<div id="container1">
<span>...</span>
</div>
<div id="container2">
<span>...</span>
</div>

Say if I have get the jQuery object $(‘container1’),how to find the <span> in it?

Answer 1

Just select the descendant span:

$('#container1 span');

Note that this will select any span inside #container1, even if is not a direct descendant.

If you want to select only direct descendants, use the parent > child selector:

$('#container1 > span');

If you have only an object reference you could:

$container1.find('span');

Or

$container1.children('span');