C12/실습문제/02-search.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>세션 스토리지에 구입 리스트 저장</title>
    <script>
        function search() {
            if (!window.sessionStorage) {
                alert("지원하지 않습니다.");
                return;
            }

            let item = document.getElementById("item").value;
            let count = sessionStorage.getItem(item);
            if (count == null) {
                alert(item + " 항목이 없습니다.");
                return;
            }

            document.getElementById("count").value = count;
        }
    </script>
</head>
<body>
<h3>세션 스토리지에 구입 리스트 검색</h3>
<hr>
<form>
    <label>품목명: <input id="item" type="text" size="10"></label>
    <label>개수: <input id="count" type="text" size="10"></label>
    <input type="button" value="검색" onclick="search()">
</form>
</body>
</html>