Odd question, I know. I'm looking at the html source of a page in a site that was migrated from 2007 to 2013. The HTML source has this odd jquery attribute in many places, such as tags. One tag has 15 of these values:

<a href='javascript:void(0);' jquery133485837484593="6" jquery43758475847584="6", jquery43758475847683="6" etc.

Any idea what these are? It seems like something that would be generated, not hand-coded.

1 Answer 1


This is the jQuery expando attribute, it's a bit random because it's generated on page load, it's "jQuery" + (new Date()).getTime() (to avoid possible naming conflicts) but you'll notice the attribute is the same for all elements.

This is they key in $.cache for the element's events and data...it's stored this way for a few reasons, the main is to avoid circular references. The ID is actually $.uuid which is just an incrementing counter used for each element's key in $.cache.


  • Thanks! Is there a sharepoint feature that uses this OOB? Is this custom functionality that someone has added?
    – Mike2500
    Nov 10, 2014 at 19:13
  • Check your master page, it seems your site is using jQuery and there are some custom JavaScript getting executed on page load. Nov 10, 2014 at 19:52

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