warning.js:34 warning: react-modal: app element is not defined. please use modal.setappelement(el) or set appelement={el}. this is needed so screen re

ts2322 Type '() => void' is not assignable to type 'null'.ts(2322)이렇게 하면 에러 발생이러면 해결...타입스크립트에서만 나는 에러다.. 꼭 타입 지정해주기!

TypeScript Common Errors!codesandboxme-react-typescript-study-jumdgg?fontsize=14&hidenavigation=1&theme=darkerror TS2339: Property --- does not exist

"export 'route' (imported as 'route') was not found in 'react-router-dom' (possible exports: browserrouter, form, hashrouter,"이런 에러가 떳는데,, 순차로 실행하니 해결

"Module build failed (from ./node_modules/source-map-loader/dist/cjs.js):""react-router", "react-router-dom" 버전업을 한 후에 저런 에러가 났는데,, 검색해도 나오는게 없었다.. 해결