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LocalStorageManager.html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>LocalStorage Manager</title>
    <style>
        body {
            font-family: 'Roboto', sans-serif;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f5f5f5;
        }

        .container {
            width: 100%;
            max-width: 600px;
            padding: 24px;
            background-color: #fff;
            border-radius: 12px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }

        h1 {
            font-size: 24px;
            margin-bottom: 16px;
            color: #212121;
        }

        h2 {
            font-size: 18px;
            margin-top: 24px;
            margin-bottom: 12px;
            color: #212121;
        }

        button {
            background-color: #6750a4; /* MD3 主色调 */
            border: none;
            color: white;
            padding: 12px 32px;
            border-radius: 9999px;
            cursor: pointer;
            font-size: 16px;
            transition: background-color 0.3s ease;
        }

        button:hover {
            background-color: #4a3c8c; /* 悬停时的深色 */
        }

        textarea {
            width: 100%;
            min-height: 150px;
            border: 1px solid #d0d5dd;
            border-radius: 8px;
            font-size: 16px;
            margin-top: 8px;
            resize: vertical;
        }

        .section {
            margin-bottom: 24px;
        }

        .section > button {
            margin-top: 8px;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>LocalStorage Manager</h1>

        <div class="section">
            <h2>导出 LocalStorage</h2>
            <button id="exportButton">导出</button>
            <textarea id="exportTextarea" readonly></textarea>
        </div>

        <div class="section">
            <h2>导入 LocalStorage</h2>
            <textarea id="importTextarea" placeholder="粘贴 JSON 格式的 LocalStorage 数据"></textarea>
            <button id="importButton">导入</button>
        </div>
    </div>

    <script>
        document.getElementById('exportButton').addEventListener('click', function() {
            const localStorageData = {};
            for (let i = 0; i < localStorage.length; i++) {
                const key = localStorage.key(i);
                localStorageData[key] = localStorage.getItem(key);
            }
            const jsonStr = JSON.stringify(localStorageData, null, 2);
            document.getElementById('exportTextarea').value = jsonStr;
        });

        document.getElementById('importButton').addEventListener('click', function() {
            const importTextarea = document.getElementById('importTextarea');
            try {
                const data = JSON.parse(importTextarea.value);
                for (const key in data) {
                    if (data.hasOwnProperty(key)) {
                        localStorage.setItem(key, data[key]);
                    }
                }
                alert('导入成功！');
            } catch (e) {
                alert('导入失败：' + e.message);
            }
        });
    </script>
</body>
</html>