[0.8] camel-case attributes do not deserialize to properties correctly.

[sorvell]

<x-thing camel-case="foo">

should result in

xThing.camelCase === 'foo'

[sorvell]

Related to #1226

[ssorallen]

Except for data- attributes probably, otherwise they are not set on the element's dataset. Or would you have to suffix those with a $?

[kevinpschaaf]

This issue only relates to the attribute deserialization feature of Polymer, which only operates on attributes matching property names defined in properties with a type field set.

Per current rules, data-foo would only be deserialized by Polymer if there was a dataFoo property defined. The fact that data-foo also deserializes to dataset.foo is a feature of the DOM, not Polymer, and that will happen regardless.

[kevinpschaaf]

Fixed in 618756b.

[ssorallen]

👍 It looks like this addresses #1226 as well since className (which converts from "class-name") is a property of HTMLElement.