Jss: Is there any way I can use sass features with jss?

[techyrajeev]

I am trying to generate styles dynamically based on color provided.

const styles = function(btnColor){
    return {
        btnTest : {
            borderColor     : darken(btnColor, '20%'),
            backgroundColor : btnColor
        }
    }
};

I am getting error as darken is not defined. How can I use sass features with jss ?
Please guide.
Thanks

[kof]

You can use this library for color conversions. It is unrelated to jss. https://www.npmjs.com/package/color