Fix addAttribute for React

[kthjm]

In React only both data-* and alia-* are kebabCase, Otherwise all camelCase.
https://facebook.github.io/react/docs/dom-elements.html

So this purposes to output property names that is not included in property-information as camelCase not kebabCase. The properties is a few but includes viewBox. SVG can't live without viewBox, right?

I have already rewritten the test a bit, but I am not sure if it is correct.
Torned to PR between property-information and here but I had no courage to touch the former.

thanks

[kthjm]

relate: rehypejs/rehype-react#5

I think the above issue is not SVG but React's attributeName problem.
So it can be resolved by output attributeNames that are out of property-information as camelCase instead of kebabCase.

[wooorm]

Sorry for the wrong wait!

SVG support is a whole other issue (literally), could you update the test cases here to just use a custom prop? So that, if we start supporting SVG, we can add cases and support for other VDOMs as well?

[wooorm]

And THANK YOU SO MUCH for working on this! 🎉

[kthjm]

I dont have confidence in interpretation I would like to ask.

Without changing any original test code (so after restoring), Add a tiny test case that depends only custom prop like:

t.test('should support `React.createElement` about attributes case', function (st) {})

Does this comply with your intention?

[kthjm]

Oh may be I took misread, you mean that just add case to should support keys ?

[wooorm]

Yes to your last comment!

[kthjm]

so sorry, I couldn't resolve non-fast-forward (I have deleted the branch by mistake) and rebuilding #9