How jQuery stores data related to an element?

jQuery - Interview Questions

jQuery.data() method aids in attaching any type of data to DOM elements, free from memory leaks. jQuery makes sure that data is removed along with the DOM elements removed via jQuery methods.

Code for Storing and retrieving data related to an element.

$('#myDiv').data('keyName', { foo : 'bar'});
$('#myDiv').data('keyName'); // { foo : 'bar'}