Bootstrap drop-down list multi-select component value

The bootstrap drop-down list is very useful.

For specific use, please refer to:

Reference: https://blog.csdn.net/qq_37677519/article/details/78143522

Used in conjunction with angularjs:

<select zs-select data-size="5" id="classId" ng-model="healthInfomationClassList" title="请选择" data-live-search="true"  multiple option-datas="optionDatas"
      class="selectpicker show-tick form-control  input-sm" style="width: 250px;">
</select>


<script>
angular.module("app").directive('zsSelect', function($compile) {
    return {
        restrict : 'A',
        require : '?ngModel',
        scope:{
            optionDatas:'='
        },
        link : function($scope, $element, $attrs, $ngModel) {
            $scope.$watch('optionDatas', function() {
                var html = "";
                var optionDatas = $scope.optionDatas;

                if (optionDatas != undefined){
                    var options = optionDatas.data;
                    var name = optionDatas.name;
                    var id = optionDatas.id;
                    for (var i=0;i<options.length;i++){
                        var option = options[i];
                        html += "<option style='font-size: 10px' value="+option[id]+">"+option[name]+"</option>";
                    }
                } else {
                    html = "";
                }
                $($element).html(html);
                $($element).selectpicker('refresh');
                if ($ngModel.$modelValue) {
                    $($element).selectpicker('val', $ngModel.$modelValue);
                }

            });
        }
    };
//数据的载入
$scope.optionDatas = {data:vm.logisticslist,name:"companyName",id:"id"};
</script>

Component values:

1. The selected value
var value = $('#sel').val();
is an array of values.
2. It takes
some time to obtain the selected key in actual use. The method is very simple.
companyName = companyName+$("#classId").find('option:selected')[i].text+"";