form (1) 썸네일형 리스트형 localStorage에 user 정보가 있거나 없을 때 form 활용하기 HTML Javascript const loginForm = document.querySelector('#login-form'); const loginInput = document.querySelector('#login-form input'); const greeting = document.querySelector('#greeting'); const HIDDEN_CLASS = "hidden"; const ID_KEY = "userId"; function onLoginSubmit(event) { event.preventDefault(); loginForm.classList.add(HIDDEN_CLASS); const userId = loginInput.value; localStorage.setItem("I.. 이전 1 다음