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</nav> <div class="container"> <h1>📅 日期计算�?/h1> <div class="card"> <div class="card-title">计算两个日期之间的间�?/div> <div class="input-row"> <div class="input-group"> <label for="input-----">开始日�?/label> <input type="date" id="startDate" aria-label="日期选择�? /> </div> <div class="input-group"> <label for="input-----">结束日期</label> <input type="date" id="endDate" aria-label="日期选择�? /> </div> </div> <div class="result" id="diffResult"> <div class="result-value">--</div> <div class="result-detail">请选择日期</div> </div> </div> <div class="card"> <div class="card-title">从指定日期加减天�?/div> <div class="input-row"> <div class="input-group"> <label for="input-----">基准日期</label> <input type="date" id="baseDate" aria-label="日期选择�? /> </div> <div class="input-group"> <label>操作</label> <select id="operation"> <option value="add">�?/option> <option value="subtract">�?/option> </select> </div> <div class="input-group"> <label for="input---">天数</label> <input type="number" id="days" value="30" min="0" aria-label="数字输入�? placeholder="请输入数字输入框" /> </div> </div> <div class="result" id="calcResult"> <div class="result-value">--</div> <div class="result-detail">结果日期</div> </div> </div> </div> <script> const today = new Date().toISOString().split("T")[0]; document.getElementById("startDate").value = today; document.getElementById("endDate").value = today; document.getElementById("baseDate").value = today; function calcDiff() { const start = new Date(document.getElementById("startDate").value); const end = new Date(document.getElementById("endDate").value); if (isNaN(start) || isNaN(end)) return; const diffTime = Math.abs(end - start); const diffDays = Math.floor(diffTime / (1000 * 60 * 60 * 24)); const weeks = Math.floor(diffDays / 7); const remainDays = diffDays % 7; const years = Math.floor(diffDays / 365); const months = Math.floor((diffDays % 365) / 30); document.getElementById("diffResult").innerHTML = ` <div class="result-value">${diffDays} �?/div> <div class="result-detail">${weeks}�?{remainDays}�?| �?{years}�?{months}个月</div> `; } function calcDate() { const base = new Date(document.getElementById("baseDate").value); const days = parseInt(document.getElementById("days").value) || 0; const op = document.getElementById("operation").value; if (isNaN(base)) return; const result = new Date(base); if (op === "add") result.setDate(result.getDate() + days); else result.setDate(result.getDate() - days); const weekdays = ["�?, "一", "�?, "�?, "�?, "�?, "�?]; document.getElementById("calcResult").innerHTML = ` <div class="result-value">${result.toLocaleDateString("zh-CN")}</div> <div class="result-detail">星期${weekdays[result.getDay()]}</div> `; } document.getElementById("startDate").addEventListener("change", calcDiff); document.getElementById("endDate").addEventListener("change", calcDiff); document.getElementById("baseDate").addEventListener("change", calcDate); document.getElementById("operation").addEventListener("change", calcDate); document.getElementById("days").addEventListener("input", calcDate); calcDiff(); calcDate(); </script> </body> </html>