difference between $.data() & .data()

[swain]

ex: <div data-attr="test"></div>

$.data('div','attr'); return undefined $('div').data('attr'); return 'test'

[ajpiano]

I am not inclined to think this is a valid bug.

A) It is ​clearly documented that when using jQuery.data(elem, "key") signature, it will not automatically parse data-attributes:

"Regarding HTML5 data-* attributes: This low-level method does NOT retrieve the data-* attributes unless the more convenient .data() method has already retrieved them."

B) Your code does not even use that signature, but rather an invalid $.data("string", "string") signature, which would not ever be expected to produce valid results.

If you can produce a working test-case on ​jsFiddle, we can reopen this bug, but for now, it appears to be invalid.

[swain]

I see, Thank U!