Support styled-jss

[hendrul]

styled-jss is near to have support for function rules in this PR, the added docs here explain how to add multiple function rules, like the great ones you offer in this wonderful lib... is it posible to support their theming api?... In my case I'm using material-ui v1 and they select react-jss as their CSSinJS engine of choice for performance reasons (and other reasons) they explain here and here. It would be awesome to be able to use the same api as styled-components and have this utility methods playing nice together.

[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]

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]

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

[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!