TypeScript Union


공통되는 거만 사용가능
`Nullable Types` - union with null or undefined

[TS discriminated union](https://texonom.com/ts-discriminated-union-1c4f3e894bf14ea3902022100486c3aa)


[TS Dicriminated Unions Pattern](https://texonom.com/ts-dicriminated-unions-pattern-68789d52e68a406280ad9e6824a373a8)





> [[TypeScript] 유니온 타입과 인터섹션 타입 (Union Type & Intersection Type) #4](https://velog.io/@soulee__/TypeScript-Union-Type)




