$(el).data() calls break due to camelCase conversion

[liady]

Currently this migration script fixes only $.data() calls, but $.fn.data still have the incompatibility with automatic camelCase conversion.

// el: <div data-my-prop=test />
var data = $(el).data();
// data: {myProp: 'test'}
assert(data['my-prop']===test) // works on jQuery v2, fails on v3

[mgol]

I have a PR adding patches for $.fn.data, but I've just realized it doesn't change the behavior of the shared code snippet. However, neither jQuery 1 nor jQuery 2 behave in that way either! data-* attribute names are camelcased in the data object.

@liady you may not remember the context after all this time, but if you do, can you explain how you got this result?