引导日期时间选取器自动输出返回日期

Question

我正在使用bootstrap-datetimepicker

我在

下面有一个工作代码，请帮助我修复我在下面的第二个脚本，我试图做的是一旦您在取件日期时间选择器中选择任何日期并在选择字段中选择持续时间，它将自动根据您从持续时间中选择的持续时间填充返回日期 选择和开始日期

第一个代码js代码：(它有效，因为默认日期是我们当前日期(

$(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);
});
})

第二个JS代码不起作用

$(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);
});                        

}(