import { css , get , SystemStyleObject } from '@styled-system/css' ; import { DefaultTheme , StyledComponent , StyledProps } from 'styled-components' ; type ThemeKeys = keyof DefaultTheme ; type VariantOf < T extends ThemeKeys > = keyof DefaultTheme [ T ] ; export interface VariantProps < T extends ThemeKeys > { /**
     * Works the same as the [Rebass `variant` props](https://rebassjs.org/variants).
     */ variant ? : VariantOf < T > ; } export interface SxProps { /**
     * Works the same as the [Rebass `sx` props](https://rebassjs.org/props#sx-prop).
     */ sx ? : SystemStyleObject ; } export type ComponentSet < T extends keyof JSX . IntrinsicElements | React . ComponentType < any > , P extends object , O extends Record < string , React . ComponentType > > = StyledComponent < T , DefaultTheme , P , never > & O ; example export const themeRef = < T extends ThemeKeys > ( tx ) => ( props ) => css ( { variant : tx + '.' + props . variant } ) ( props ) ; example export const sx = ( props ) => css ( props . sx ) ( props ) ; example export const extend = ( styles = { } ) => css ( { boxSizing : 'border-box' , m : 0 , minWidth : 0 , ... styles } ) ; example export const variant = < T extends string , P extends string > ( prop , valiants ) => ( props ) => css ( valiants [ props [ prop ] ! ] ) ( props ) ; example export const themeGet = ( key , fallback ? ) => ( theme ) => get ( theme , key , fallback ) ;