react 라이브러리 styled components

css문법 그대로 style을 작성하게 해주는 녀석 

https://styled-components.com/

const Button = styled.button<{ $primary?: boolean; }>`
  background: transparent;
  border-radius: 3px;
  border: 2px solid #BF4F74;
  color: #BF4F74;
  margin: 0.5em 1em;
  padding: 0.25em 1em;

  ${props => props.$primary && css`
    background: #BF4F74;
    color: white;
  `}
`;

const Container = styled.div`
  text-align: center;
`

render(
  <Container>
    <Button>Normal Button</Button>
    <Button $primary>Primary Button</Button>
  </Container>
);