import type * as CSS from 'csstype'; import { Config, system } from 'styled-system'; const config: Config = { shadow: { property: 'boxShadow', scale: 'shadows', defaultScale: ['#000', '#ffff'], }, }; export interface customShadowProps { /** * The `box-shadow` property */ shadow?: CSS.Property.BoxShadow | number; } export const customShadow = system(config);