bootstrap-datepicker中文文档
bootstrap-datepicker calendarWeeks显示当前第几周
通过bootstrap-datepicker的calendarWeeks属性我们可以在日期控件的第一列显示当前第几周，设置calendarWeeks为true显示第几周，设置false不显示。
代码例子
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>bootstrap-datepicker calendarWeeks例子</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, minimal-ui">
<script src="https://www.itxst.com/package/jquery-3.5.1/jquery.min.js"></script>
<script src="https://www.itxst.com/package/bootstrap-4.5.0/js/bootstrap.min.js"></script>
<link href="https://www.itxst.com/package/bootstrap-4.5.0/css/bootstrap.css" rel="stylesheet">
<script src="https://www.itxst.com/package/bootstrap-datepicker-1.9.0/js/bootstrap-datepicker.min.js"></script>
<script src="https://www.itxst.com/package/bootstrap-datepicker-1.9.0/locales/bootstrap-datepicker.zh-CN.min.js"></script>
<link href="https://www.itxst.com/package/bootstrap-datepicker-1.9.0/css/bootstrap-datepicker.min.css" rel="stylesheet">
<style>
.cs {
background-color: red !important;
color: #fff !important;
}
</style>
</head>
<body style="padding:10px;">
<div class="container ">
<input type="text" id="inputDate1" placeholder="选择日期" class="form-control">
</div>
<script>
//初始化日期控件
var ops = {
language: 'zh-CN', //语言
autoclose: true, //选择后自动关闭
clearBtn: true,//清除按钮
format: "yyyy-mm-dd",//日期格式
calendarWeeks:true //当前第几周
};
$("#inputDate1").datepicker(ops);
</script>
</body>
</html>