LocalStorage, SessionStorage 클라이언트에 정보 저장

https://webisfree.com/2016-06-24/[%EC%9E%90%EB%B0%94%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8]-localstorage-sessionstorage-%ED%81%B4%EB%9D%BC%EC%9D%B4%EC%96%B8%ED%8A%B8%EC%97%90-%EC%A0%95%EB%B3%B4-%EC%A0%80%EC%9E%A5