选项卡索引不适用于日期选择器（AngularJS）

Question

我已经为下面显示的屏幕截图分别添加了tabindex = 1,2和3。但是，选项卡索引1打开日历1并且不关闭它，因此2不起作用，选项卡索引3打开搜索。我该如何解决这个问题？

<div class="col-sm-1 col-md-1 col-lg-1 search-date heightSixty" id="arrivalDate">
                    <button type="button" class="btn btn-primary calendar-div"
                            tabindex="4" id="one"
                            ng-click="vm.arrivalDtOpen($event)"
                            datepicker-popup="{{'MMM d'}}"
                            ng-model="vm.searchRQ.arrivalDate"
                            is-open="vm.arrivalDtOpened"
                            ng-change="vm.arrivalDateChange()"
                            datepicker-options="dateOptions"
                            show-weeks="false"
                            current-text="Reset To Today's Date"
                            ng-focus=vm.arrivalDtOpen($event)"
                        >
                        <div class="calendar-date-font" title="Select Starting Arrival Date">
                            {{ vm.searchRQ.arrivalDate | date : 'MMM' }}</br>
                        </div>
                        <div class="calendar-date">
                            {{  vm.searchRQ.arrivalDate | date : 'd' }}
                        </div>
                    </button>
                </div>
                <div class="col-sm-1 col-md-1 col-lg-1 search-date heightSixty" id="departureDate">
                    <button type="button" class="btn btn-primary calendar-div"
                            tabindex="5" id="two"
                            ng-click="vm.departureDtOpen($event)"
                            datepicker-popup="{{'MMM d'}}"
                            ng-model="vm.searchRQ.departureDate"
                            is-open="vm.departureDtOpened"
                            ng-change="vm.departureDateChange()"
                            datepicker-options="dateOptions"
                            ng-focus="vm.departureDtOpen($event)"
                            show-weeks="false"
                            current-text="Reset To Today's Date">

                        <div class="calendar-date-font" title="Select Ending Arrival Date">
                            {{ vm.searchRQ.departureDate | date : 'MMM' }}</br>
                        </div>
                        <div class="calendar-date">
                            {{ vm.searchRQ.departureDate | date : 'd' }}
                        </div>
                    </button>
                </div>
                <div class="col-sm-2 col-md-2 col-lg-2 search-icon heightSixty">
                    <button class="btn btn-primary search-button" placeholder=" " title="Search" id="btn-search"
                            ng-click="vm.retrieveReservation(searchReservationVm.searchRQ)">
                        <div tabindex="6" class="glyphicon glyphicon-search search-icon-bg" id="searchImg"
                             ng-focus="vm.departureDtClose($event)">
                        </div>
                    </button>
                </div>