[RaisedButton] Add buttonStyle prop

[c089]

• PR has tests / docs demo, and is linted.
• Commit and PR titles begin with [ComponentName], and are in imperative form: "[Component] Fix leaky abstraction".
• Description explains the issue / use-case resolved, and auto-closes the related issue(s) (http://tr.im/vFqem).

Closes #4345

[mbrookes]

This should go in render()

[nathanmarks]

@c089 style is already being put onto the root node, this would mean we're passing that prop to multiple nodes...

@oliviertassinari This is kind of like that other one. Personally, I think that we have an issue similar to this with most components that have Paper at the root node. Honestly, I wouldn't even use a Paper component just for a shadow so we could avoid this sort of issue, but that's another discussion 😄

[c089]

@nathanmarks

@c089 style is already being put onto the root node, this would mean we're passing that prop to multiple nodes...

True, that would be confusing. Would you accept this PR if it added a buttonStyle prop instead?

@oliviertassinari This is kind of like that other one. Personally, I think that we have an issue similar to this with most components that have Paper at the root node. Honestly, I wouldn't even use a Paper component just for a shadow so we could avoid this sort of issue, but that's another discussion 😄

Agreed, I was surprised by this here as well...

[kidwm]

vote for buttonStyle instead.

[c089]

@kidwm @nathanmarks I updated the PR to add a buttonStyle prop instead.

I noticed this is inconsistent with the API of FlatButton though, which does use style for it's EnhancedButton, so that might be a separate change to consider for the next release that breaks APIs.

[nathanmarks]

@mbrookes How do we make this consistent when one button has a completely different root node? ahhh! 🔨 🔥

[mbrookes]

@nathanmarks With a single Button component? 😄

[oliviertassinari]

@c089 Thanks for this PR. We have added a buttonStyle property.