Question

In the following snippet, why is the length is 0 when it should be 1?

var jQueryObj = $("<p>testing</p>");
// Display the length
$('body').html($("p", jQueryObj).length);

<script src="http://code.jquery.com/jquery-2.2.0.js"></script>

Answer 1

When you provide the context, you are telling jQuery to find the p element inside that context, so your selector will look for any p tag that is a child of the context.

If you add a container to the context, it will be able to find that element.

var jQueryObj = $("<div><p>testing</p></div>");
// Display the length
$('body').html($("p", jQueryObj).length);

<script src="http://code.jquery.com/jquery-2.2.0.js"></script>