Question

Can I do

<div class="some_div">some div</div>
<script>
    jQuery('.some_div').data('some_data','some info').remove();
</script>

where the information is added with data’s method, is still around the DOM? Do I need to uninitialize? Is the information automatically removed when the div element has no references left?

Answer 1

The data is stored in a variable available to the jQuery objects via closure. It is never stored in the dom. Remove method deletes the data along with the DOM element.

.remove( [ selector ] )

Similar to .empty(), the .remove()
method takes elements out of the DOM.
We use .remove() when we want to
remove the element itself, as well as
everything inside it. In addition to
the elements themselves, all bound
events and jQuery data associated with
the elements are removed.

source: jQuery API: remove()