DefinitelyTyped/types/styled-components/cssprop.d.ts

import {} from "react";
import { CSSProp } from ".";

declare module "react" {
  interface Attributes {
      // NOTE: unlike the plain javascript version, it is not possible to get access
      // to the element's own attributes inside function interpolations.
      // Only theme will be accessible, and only with the DefaultTheme due to the global
      // nature of this declaration.
      // If you are writing this inline you already have access to all the attributes anyway,
      // no need for the extra indirection.
      /**
       * If present, this React element will be converted by
       * `babel-plugin-styled-components` into a styled component
       * with the given css as its styles.
       */
      css?: CSSProp;
  }
}