如何根据条件获取JQuery-UI结束日期

Question

在Laravel-5.8项目中，我正在实现JQuery-UI datepicker

控制器：

public function findEmployeeLeaveCount(Request $request)
{
    $userCompany = Auth::user()->company_id;
    $userEmployee = Auth::user()->employee_id;
    $employeeCode = Auth::user()->employee_code;
    $employeeemptypeid              = HrEmployee::where('employee_code', $employeeCode)->pluck('employee_type_id')->first();
    $leavetypeid                    = HrLeaveType::select('id')->where('company_id', $userCompany)->where('id',$request->id)->first()->id;
     $weekendinclusive               = HrLeaveTypeDetail::where('leave_type_id', $leavetypeid)->where('employee_type_id', $employeeemptypeid)->pluck('weekend_inclusive')->first();
    return response()->json([
        'weekendinclusive' => $weekendinclusive,
    ]);        
}  

我从控制器传递了一个周末，使用JSON进行查看

查看

                <select id="leave_type" class="form-control select2bs4" data-placeholder="Choose Leave Type" tabindex="1" name="leave_type_id" style="width: 100%;">
                    <option value="">Select Leave Type</option>
                    @if($leavetypes->count() > 0)
                        @foreach($leavetypes as $leavetype)
                            <option value="{{$leavetype->id}}" {{ old('leave_type_id', $leaverequest->leave_type_id) == $leavetype->id ? 'selected' : ''}}>{{$leavetype->leave_type_name}}
                            </option>
                        @endforeach
                    @endif
                </select>

<input type="hidden" id="weekendinclusive" class="form-control" value="0" >

          <div class="col-sm-4">
            <div class="form-group">
                <label>Commencement Date:<span style="color:red;">*</span></label>
                <div class="input-group">
                <div class="input-group-prepend">
                  <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>
                </div>                        
                    <input type="text" id="commencement_date" class="form-control commencement_date" placeholder="dd/mm/yyyy" readonly autocomplete="off" name="commencement_date" value="{{old('commencement_date')}}" >
                </div>

            </div>
          </div>                                                
          <div class="col-sm-4">
            <div class="form-group">
                <label>Leave Days:<span style="color:red;">*</span></label><input type="hidden" id="leave_balance" value="0" disabled>
                <input  type="text" 
                id="leave_days" 
                name="no_of_days" 
                class="form-control no_of_days" 
                placeholder="e.g. 10" 
                value="{{old('no_of_days')}}" 
                oninput="javascript: if (this.value.length > this.maxLength) this.value = this.value.slice(0, this.maxLength);"
                style="width: 100%;" 
                maxlength="3" onkeyup="checkScore(this.value)" onkeypress="allowNumbersOnly(event)">
            </div>
          </div> 
          <div class="col-sm-4">
            <div class="form-group">
                <label>Resumption Date:</label>
                <div class="input-group">
                <div class="input-group-prepend">
                  <span class="input-group-text"><i class="far fa-calendar-alt"></i></span>
                </div>                        
                    <input type="text" id="resumption_date" class="form-control resumption_date" placeholder="dd/mm/yyyy" readonly autocomplete="off" name="resumption_date" value="{{old('resumption_date')}}" >
                </div>

            </div>
          </div> 

        <script type="text/javascript">
        $(document).ready(function() {
            $(document).on('change', '#leave_type', function() {
                var air_id =  $(this).val();
                var a = $(this).parent();
                var op = "";
                
                $.ajax({
                    type: 'get',
                    url: '{{ route('get.employeeleavecounts.all') }}',
                    data: { 'id': air_id },
                    dataType: 'json',      //return data will be json
                    success: function(data) {
                        $('#weekendinclusive').val(data.weekendinclusive);
                    },
                    error:function(){

                    }
                });
            });
        });
        </script>

    <script type="text/javascript">
         $(document).ready(function () {
                $("#leave_days").on('keyup blur', function (e) {
                var periodval=parseInt($("#leave_days").val());
                var startDate = $('.commencement_date');
                var endDate = $('.resumption_date');

                var dte = startDate.datepicker("getDate"); 
                        dte.setDate(dte.getDate()+periodval); 
                        endDate.datepicker("setDate", dte);               

              });
                $( '.commencement_date' ).datepicker({
                    dateFormat: 'dd-mm-yy',
                    changeMonth: true,
                    changeYear: true,      
                    showAnim: 'slideDown',
                    duration: 'fast',   
                    minDate: +1,
                    setDate: new Date(),
                    yearRange: new Date().getFullYear() + ':' + new Date().getFullYear(),
            }).datepicker('setDate', '1');
                $( '.resumption_date' ).datepicker({
                    dateFormat: 'dd-mm-yy',
                    changeMonth: true,
                    changeYear: true,      
                    showAnim: 'slideDown',
                    duration: 'fast',   
                    minDate: +1,
                    yearRange: new Date().getFullYear() + ':' + new Date().getFullYear(),
                    enableOnReadonly: true,
                    beforeShow: function(i) { if ($(i).attr('readonly')) { return false; } }
                });
        });
    </script>

从上图中，我从开始日期开始恢复日期，并使用#leave_days离开日期。效果很好。

如何在#leave_days内向我的JQuery添加If语句，即如果#weekendinclusive = 1，则遵循我以前使用的正常模式，包括周末，但是如果#weekendinclusive = 0，则应将周末从我的工作中排除在#leave_days