Multiple Props Options for Styled Components

Styled components also accepts a function where in you can read props. Moreover if you choose to pass a theme prop instead, you can also define an object for your themes.

const themes = {
  dark: css `
     background: ${colors.dark};
     color: ${colors.light};
  `,
  light: css`
     background: ${colors.light};
     color: ${colors.dark};
  `
}
export const Navbar = styled.nav(({theme})=>`
  width: 100%;
  background: ${colors.light};
  color: ${colors.dark};
  ... // rest of the css

  ${theme?themes[theme]:''}

  `)

<Navbar theme="dark" />

This is the solution I ended up using:

export const Navbar = styled.nav`
  width: 100%;

  ...  // rest of the regular CSS code

  ${props => {
    if (props.dark) {
      return `
        background: ${colors.dark};
        color: ${colors.light};
    `
    } else if (props.light) {
      return `
        background: ${colors.light};
        color: ${colors.dark};
    `
    } else {
      return `
        background: ${colors.light};
        color: ${colors.dark};
    `
    }
  }}
`

Keep the passed in prop name the same. Then you can utilize a switch/case statement. For example, passing in a color prop and using it as a type to be matched against a case.

Working example:

---

For example:

<Button color="primary">Example</Button>

components/Button

import styled from "styled-components";

const handleColorType = color => {
  switch (color) {
    case "primary":
      return "#03a9f3";
    case "danger":
      return "#f56342";
    default:
      return "#fff";
  }
};

const Button = styled.button`
  display: block;
  cursor: pointer;
  border: 0;
  margin: 5px 0;
  background: #000;
  font-size: 20px;
  color: ${({ color }) => handleColorType(color)};

  &:focus {
    outline: 0;
  }
`;

export default Button;

---

If you have multiple attributes (like a color and a background pair), then utilizing the same concept as above, alter the handleColorType to return a string with attributes and invoke the handleColorType function without a style property.

For example:

<MultiButton color="primary">Example</MultiButton>

components/MultiButton

import styled from "styled-components";

const handleColorType = color => {
  switch (color) {
    case "primary":
      return "color: #03a9f3; background: #000;";
    case "danger":
      return "color: #fff; background: #f56342;";
    default:
      return "color: #000; background: #eee;";
  }
};

const MultiButton = styled.button`
  display: block;
  margin: 5px 0;
  cursor: pointer;
  border: 0;
  font-size: 20px;
  ${({ color }) => handleColorType(color)};

  &:focus {
    outline: 0;
  }
`;

export default MultiButton;

Something more elegant (I guess) and modern would be a combination of destructuring the props and using the switch statement such as:

const Button = styled.button`
  ${({primary, secondary}) => {
      switch(true) {
        case primary:
          return `background-color : green`
        case secondary:
          return `background-color : red`
      }
    }
  }
`