easysit

https://github.com/justinpark/justin-do-it-react/blob/4dcc881d883471090a1cdfd2890218151f89bc59/package.json#L25-L39

391쪽과 동일하게 수정

3

https://github.com/justinpark/justin-do-it-react/blob/master/src/doit-ui/Modal/create.jsx#L4

https://github.com/justinpark/justin-do-it-react/blob/master/src/stories/FlexStory.jsx

https://github.com/justinpark/justin-do-it-react/blob/master/src/App.css

책 39쪽에 맞춰 소스 확인 부탁드립니다. https://github.com/justinpark/justin-do-it-react/blob/master/src/02/02-3.js#L13