serpiko

@123rudgks useCallback 1 const onToggle = useCallback( 2 () => { 3 /* ... */ 4 }, [users] 5 ); useMemo 1 const onToggle = useMemo( 2 () => ()...

```javascript // (2022 추천해요) Optional chaining and Nullish coalescing operator :) const nameWithDog = { name: '멍멍이' }; function getName(animal) { return animal?.name ?? '이름이 없는 동물입니다.'; } console.log( getName()...

@siykim https://docs.gitbook.com/