html的week控件 获取周(星期)的第一天(周一)和最后一天(周日)

<input type="week" id="week" class="my-css" value="@ViewBag.DefaultWeek" />

<script>
function PageList() {                                
     var dateString = $("#week").val();//控件值格式为： 'YYYY-WW'，如：2024-W42
     console.log("年度第几周", dateString);
     var year = parseInt(dateString.substr(0, 4), 10);//截取字符串“年”的部分:2024
     var week = parseInt(dateString.substr(6, 2), 10);//截取字符串“第几周”的部分:42

     //计算日期
     var jsDate = new Date(year, 0, (week - 1) * 7);//生成日期
     var dayOfWeek = jsDate.getDay();
     var dayOffset = dayOfWeek === 1 ? 0 : 1 - dayOfWeek;

     var monday = new Date(jsDate.setDate(jsDate.getDate() + dayOffset + 1));//星期一日期
     var sunday = new Date(jsDate.setDate(monday.getDate() + 6));//星期日日期(星期一+6天)

     var StartDate = monday.toISOString().substr(0, 10);
     var EndDate = sunday.toISOString().substr(0, 10);
     console.log('星期一: ' + StartDate);
     console.log('星期日: ' + EndDate);
}
</script>