import * as React from "react"; import styled, { css } from "../.."; // Props and themes are well testet within the other cases. // We just need to know that they are passed to the function // properly. A single prop will suffice. interface Props { size: string; } const functionReturningStyleObject = (props: Props) => ({ padding: props.size === "big" ? "10px" : 2 }); const Box = styled.div` ${functionReturningStyleObject} ${{ backgroundColor: "red", // Supports nested objects (pseudo selectors, media queries, etc) "@media screen and (min-width: 800px)": { backgroundColor: "blue", }, fontSize: 2 }}`; ;