React-Typescript를 쓰면서 겪은 에러와 해결책

1.[#useRef, #TS2322, #MutableRefObject<undefined>]React-Typescript에서 useRef를 쓰면서 겪은 에러

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2.[#set함수의 초깃값 타입]Type error: Type 'Dispatch < SetStateAction>' is not assignable to > type '() => void'. TS2322

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5.[#해결못한에러,#semantic-UI, #semantic-ui-css import]Create-React-App with TypeScript failing to compile after importing Semantic UI

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