Support styled-jss about styled-system

[lttb]

@hendrul just to note, we've decided to move on with props.theme convention, so theming support had been released in v2.2.0

there is an example with styled-system: https://codesandbox.io/s/0p156o834n

@jxnblk btw awesome project, thanks!

[jxnblk]

Right, what I’m saying is that the convention is to pass context values as props rather than leaving them on the context object

[jxnblk]

Unless theme is passed as a prop (which it looks like it's still only in context here https://github.com/cssinjs/styled-jss/pull/35/files#diff-04c6e90faac2675aa89e2176d2eec7d8R66), styled-system won't be able to pick up the theme values. That said, I don't see why this styled-jss library shouldn't work like every other styled-components clone

[hendrul]

Yes with the PR they are passing the theme, look at the end of the PR,

+const Button = styled('button')((props, {theme}) => ({
+  color: theme.color,
+  'background-color': theme.backgroundColor,

[jxnblk]

Closing this out. Again, styled-system should work with any CSS-in-JS library that passes props.theme as a convention