error when using using camel case with HTML5 data attribute

[ivijaygupta]

when I try to use HTML5 data attribute in camelcase to get some value, it shows undefined error messsage. here's the error fiddle - ​http://jsfiddle.net/ivijaygupta/Lt3YP/4/ and when I convert it into lowercase, it works absolutely fine here's the working fiddle - ​http://jsfiddle.net/ivijaygupta/Lt3YP/6/

I'm sure about whether it's a bug or something else.

[dmethvin]

Nope, not a bug. Read the docs or ask for help on a forum.