如何使用其他自定义指令中的元素标记作为另一个自定义指令的模板

我对angularjs比较陌生。我正在客户端使用angularjs创建一个web应用程序。我制作了几个自定义指令，希望客户端能够自定义每次登录时看到的指令。我试图创建一个字符串，其中填充用户选择的自定义指令标记。该信息将作为cookie值保存，并在用户登录时由控制器加载

这是传递的cookie值（我现在已经硬编码了）：

public usersCustoms = `<div class="mdl-grid"> 
                                <div id="firstrow" class="mdl-cell mdl-cell--12-col mdl-cell--8-col-tablet mdl-grid" >
                                    <cit-recap > </cit-recap>
                                    <veh-ar-recap></veh-ar-recap>
                                    <new-models-inv></new-models-inv>
                                    <used-models-inv></used-models-inv>
                                </div>
                                <div id="secondrow" class="mdl-cell mdl-cell--12-col mdl-cell--8-col-tablet mdl-grid">
                                    <deal-recap></deal-recap>
                                    <vehicle-inv></vehicle-inv>
                                    <acct-trend></acct-trend>
                                </div>
                                <div id="thirdrow" class="mdl-cell mdl-cell--12-col mdl-cell--8-col-tablet mdl-grid">
                                    <parts-inv></parts-inv>
                                </div>
                            </div>`;

以下是指令——最后一个指令"usersCustomDirective"是应该拉入其他指令的指令。

namespace DashboardDemo {
function citRecap(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/citrecap.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('citRecap', citRecap);

function vehArRecap(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/vehArRecap.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('vehArRecap', vehArRecap);
function newModelsInv(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/newModelsInv.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('newModelsInv', newModelsInv);
function usedModelsInv(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/usedModelsInv.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('usedModelsInv', usedModelsInv);

function dealRecap(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/dealRecap.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('dealRecap', dealRecap);

function vehicleInv(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/vehicleInv.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('vehicleInv', vehicleInv);

function acctTrend(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/acctngTrend.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('acctTrend', acctTrend);
function partsInv(): ng.IDirective {
    return {
        templateUrl: 'ngDashboardDemo/Views/Directives/partsinv.html',
        restrict: 'AE',
        replace: true,
        controller: DashboardDemo.DashboardController,
        controllerAs: 'dc',
        link: function (scope, elem, attrs) {
        }
    }
}
angular.module('DashboardDemo').directive('partsInv', partsInv);
function usersCustomDirective(): ng.IDirective {
    return {
        link: function (scope, elem, attrs) {
            //elem.html(scope.dc.usersCustoms);
            //console.log(scope.dc.usersCustoms);
            elem.html(scope.userOptions);
        },
        restrict: 'AEC',
        replace: true,
        transclude: true,
        controller: DashboardController,
        controllerAs: 'dc',
        scope: {
            userOptions: '@userOptions'
        },
        //template: scope.userOptions
    }
}
angular.module('DashboardDemo').directive('usersCustomDirective', usersCustomDirective);

}

这是我的HTML视图：

<main class="mdl-color--grey-100">
<users-custom-directive user-options ="{{dc.usersCustoms}}"></users-custom-directive></main>

正如现在所写的，我假设html不会显示，因为html无法识别我的自定义标记。我也尝试过在链接函数中使用elem.replaceAll，但得到了类似的结果。当我在chrome中打开开发人员工具时，在元素下，我会看到我的div和div中的自定义标记，但是，只有div被渲染，自定义标记没有。控制台已经记录了传入的字符串值。我还尝试将"usersCustomDirective"更改为：

function usersCustomDirective(): ng.IDirective {
    return {
        link: function (scope, elem, attrs) {
            //elem.html(scope.dc.usersCustoms);
            //console.log(scope.dc.usersCustoms);
            console.log(scope.userOptions);
        },
        restrict: 'AEC',
        replace: true,
        transclude: true,
        controller: DashboardController,
        controllerAs: 'dc',
        scope: {
            userOptions: '@userOptions'
        },
        template: scope.userOptions
    }
}

它并没有在html中显示任何内容，而是显示了我正在传递的文本字符串。