Spectrum progress?

Hey there!
I know many developers are concentrating on react.js for baking their UI, but i find the Spectrum elements very helpful so far.
My only problem is that i’m missing all those slider gradients, color wheels etc…from spectrum css. Is there any update on when they will come? Or is there any workaround for creating a gradient track for the current sliders other than diving deep into react?
BTW there are images missing in the documentation. Here for example: https://www.adobe.io/photoshop/uxp/uxp/reference-spectrum/User%20Interface/sp-action-button/