Bootstrap Datetime Picker輸出自動返回日期

Question

我正在使用bootstrap-datetimepicker

我在下面有一個工作代碼，請幫我修復下面的第二個腳本，我試圖做的是，一旦你在拾取日期時間選擇器中選擇任何日期並選擇選擇字段上的持續時間，它將自動填滿返回日期基於您從持續時間選擇和開始日期中選擇的持續時間

第一個代碼js代碼:(它的工作原理，因為默認日期是我們當前的日期）

$(document).ready(function() {

$('#datetimepicker8').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date(), defaultDate : Date.now() });
$('#datetimepicker9').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date()});

$('select[name = sas]').on('change', function() {

    var futureDate = new Date(Date.now());
    futureDate.setMonth(futureDate.getMonth() + parseInt(this.value));
    $('#datetimepicker9').data("DateTimePicker").date(futureDate);

});
})

第二個JS代碼不起作用

$(document).ready(function() {

    $('#datetimepicker8').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date()});
    $('#datetimepicker9').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date()});

    $('select[name = sas]').on('change', function() {

        //start date
        $('#datetimepicker8').data("DateTimePicker").date(Date.now());

        //future date
        var futureDate = new Date(Date.now());
        futureDate.setMonth(futureDate.getMonth() + parseInt(this.value));
        $('#datetimepicker9').data("DateTimePicker").date(futureDate);

    });

})

HTML

<select name="sas">
      <option disabled selected value required>Duration: 1-36 Months</option>
      <option value="1">1 Month</option>
      <option value="2">2 Months</option>
      <option value="3">3 Months</option>
      <option value="4">4 Months</option>
      <option value="5">5 Months</option>
      <option value="6">6 Months</option>
      <option value="7">7 Months</option>
      <option value="8">8 Months</option>
      <option value="9">9 Months</option>
      <option value="10">10 Months</option>
      <option value="11">11 Months</option>
      <option value="12">12 Months</option>
      <option value="13">13 Months</option>
      <option value="14">14 Months</option>
      <option value="15">15 Months</option>
      <option value="16">16 Months</option>
      <option value="17">17 Months</option>
      <option value="18">18 Months</option>
      <option value="19">19 Months</option>
      <option value="20">20 Months</option>
      <option value="21">21 Months</option>
      <option value="22">22 Months</option>
      <option value="23">23 Months</option>
      <option value="24">24 Months</option>
      <option value="25">25 Months</option>
      <option value="26">26 Months</option>
      <option value="27">27 Months</option>
      <option value="28">28 Months</option>
      <option value="29">29 Months</option>
      <option value="30">30 Months</option>
      <option value="31">31 Months</option>
      <option value="32">32 Months</option>
      <option value="33">33 Months</option>
      <option value="34">34 Months</option>
      <option value="35">35 Months</option>
      <option value="36">36 Months</option>
</select>

Answer 1

$（document）.ready（function（）{

$('#datetimepicker8').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date() }); 
$('#datetimepicker9').datetimepicker({ sideBySide: true, toolbarPlacement: "bottom", showClose: true, stepping: 30, minDate: new Date()});                                    

$('select[name = sas]').on('change', function() {

    //start date
   var objs = $('#datetimepicker8').data('DateTimePicker').date()


    //future date

     var futureDate = new Date(objs);
    futureDate.setMonth(futureDate.getMonth() + parseInt(this.value));
    $('#datetimepicker9').data("DateTimePicker").date(futureDate);

});                        

}）