[whatwg] [html5] r5307 - [giow] (0) use vendor--feature instead of _vendor-feature since Apple engineers [...]

[Aryeh Gregor]

On Tue, Aug 31, 2010 at 3:48 AM, Simon Pieters <simonp at opera.com> wrote:
> If a vendor is called "data", then data--feature becomes a data-* attribute
> and is included in .dataset.

I missed the fact that "data--foo" is actually a valid data attribute.
 I guess I assumed that the name part couldn't start with a hyphen.
"data--foo" would be accessed via JS as .dataset.Foo rather than
.dataset.foo because of a degenerate application of the camel-casing
rules, but it's allowed.

Anyway, I preferred the initial-underscore convention -- it's easier
to spot, and would be more understandable to people who know CSS.