console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
    <head>
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/css/bootstrap-datepicker.min.css" integrity="sha512-mSYUmp1HYZDFaVKK//63EcZq4iFWFjxSL+Z3T/aCt4IO9Cejm03q3NKKYN6pFQzY0SBOr8h+eCIAZHPXcpZaNw==" crossorigin="anonymous" referrerpolicy="no-referrer" />
        <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/js/bootstrap-datepicker.min.js" integrity="sha512-T/tUfKSV1bihCnd+MxKD0Hm1uBBroVYBOYSk1knyvQ9VyZJpc/ALb4P0r6ubwVPSGB2GvjeoMAJJImBG12TiaQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/locales/bootstrap-datepicker.zh-CN.min.js" integrity="sha512-iDxVNnhHWKfWPm0vWzbiXqosxX8loK3oRcMg+QAlaDeLDi1HcUo96+xAVkgPI5JRR1SXN3aMQsMN1dB8H/Subg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
    </head>
    <body>
        <input id="bt" type="button" value="getDate" />
        <input type="text" class="datepicker" placeholder="请选择日期" />

        <div class="input-group input-medium date-picker input-daterange" data-date-format="yyyy-mm-dd">
            <input id="begin" name="dtBegin" class="form-control" style="font-size: 13px;" type="text" value="">
            <span class="input-group-addon">到</span>
            <input name="dtEnd" class="form-control" style="font-size: 13px;" type="text" value="">
        </div>
    </body>
    <script type="text/javascript">
    $(function () {
        $(".datepicker").datepicker({
            language: "zh-CN",
            autoclose: true,//选中之后自动隐藏日期选择框
            clearBtn: true,//清除按钮
            todayBtn: true,//今日按钮
            format: "yyyy-mm-dd"//日期格式，详见 http://bootstrap-datepicker.readthedocs.org/en/release/options.html#format
        });

        $(".date-picker").datepicker({
            language: "zh-CN",
            format: "yyyy-mm-dd HH:MM:ss",
            autoclose: true
        });

        $("#bt").click(function(){
            let val = $('#begin').val();
            console.log(val);
        });
    });
    </script>
</html>
本项目引用的自定义外部资源

jquery.min.js