Bug Tracker

#13110 closed bug (notabug)

Opened December 23, 2012 10:12AM UTC

Closed December 23, 2012 01:59PM UTC

.data() not working properly as HTML5 element.dataset does

Reported by: alberto.delatorre@gmail.com Owned by:
Priority: undecided Milestone: None
Component: unfiled Version: git
Keywords: Cc:
Blocked by: Blocking:
Description

If you have an element:

<div data-color="black" data-id="1">...</div>

The $("div").data() and $("div").get(0).dataset will return:

{color: "black", id:"1"}

If in js code we do:

$("div").attr("data-user","John");

Then the $("div").data() is not affected, but the $("div").get(0).dataset is updated:

{color: "black", id:"1", user:"John"}
Attachments (0)
Change History (2)

Changed December 23, 2012 10:25AM UTC by anonymous comment:1

JSFiddle example: http://jsfiddle.net/qWpbm/

Changed December 23, 2012 01:59PM UTC by dmethvin comment:2

resolution: → notabug
status: new → closed

The data attributes map is only synchronized once, otherwise it would be extremely expensive to retrieve:

**The data- attributes are pulled in the first time the data property is accessed and then are no longer accessed or mutated (all data values are then stored internally in jQuery).** http://api.jquery.com/data/

Please read the docs and ask for help on the forum if it still isn't clear.