Linked datepickers

Code:
<div class="row">
      <div class="col-sm-3">
          <div class="form-group">
              <div class="input-group date" data-target-input="nearest" NgTempusdominusBootstrap>
                  <input
                  class="form-control"
                  [(ngModel)]="startDate"
                  (ngModelChange)="update()"
                  [options]="startOptions"
                  NgTempusdominusBootstrapInput
                  type="text"
                  />
                  <div class="input-group-append" NgTempusdominusBootstrapToggle>
                      <div class="input-group-text"><i class="fa fa-calendar"></i></div>
                  </div>
              </div>
          </div>
      </div>
      <div class="col-sm-3">
          <div class="form-group">
              <div class="input-group date" data-target-input="nearest" NgTempusdominusBootstrap>
                  <input
                  class="form-control"
                  [(ngModel)]="endDate"
                  (ngModelChange)="update()"
                  [options]="endOptions"
                  NgTempusdominusBootstrapInput
                  type="text"
                  />
                  <div class="input-group-append" NgTempusdominusBootstrapToggle>
                      <div class="input-group-text"><i class="fa fa-calendar"></i></div>
                  </div>
              </div>
          </div>
      </div>
  </div>