Как добавить всплывающие подсказки с bootstrap 4 в опциях раскрывающегося списка в angular

Question

Я в настоящее время разрабатываю приложение каталога с angular 7, на данный момент все идет хорошо, просто я застрял в этой проблеме, и я не знаю, как ее решить.

Проблема в том, что у меня есть список с несколькими параметрами, и его параметры загружаются из файла .ts, поэтому в моем файле. html я не помещаю слишком много в мой список выбора, а только один, который загружает все содержимое из моего .ts файл вроде этого:

<option *ngFor="let worker of workerExportList" [ngValue]="worker" data-toggle="tooltip" data-placement="top" title="Tooltip on top">{{worker.label}}</option>

Вот изображение из моего списка:

Я хочу, чтобы каждый раз, когда я просматриваю Опция из этого списка отображает всплывающие подсказки.

Пример на моей мыши помещен в «Экспорт каталогов». Отображается всплывающая подсказка, которая указывает, например, «Привет экспортировать каталоги», а когда я наведу указатель мыши на другую опцию список, например, «Экспорт сопоставлений», другой плакат всплывающих подсказок, например, «Приветствия экспорта сопоставлений».

На данный момент я не смог этого сделать, единственное, что мне удалось do - это отображение уникальных всплывающих подсказок, которые отображаются во всех параметрах списка.

вот мой код из моего компонента. html страница:

и вот код для моего component.ts:

    import { Observable } from 'rxjs/Rx';
import { Http, RequestOptions, Headers, ResponseContentType, Response } from '@angular/http';
import { environment } from './../../../../environments/environment';
import { ExportService } from './../../exportDirectoryBrowsing/export.service';
import { sideMenuComponent } from './../../../layout/side-menu-component/side-menu.component';
import { WorkerParameterInfo } from './../workerParameterInfo';
import { WorkerExport } from './WorkerExport';
import { MappingSystemService } from './../../mappingSystem/mapping-system.service';
import { CatalogService } from './../../catalogue/Catalog.service';
import { Catalog } from './../../catalogue/Catalog';
import { MappingSystem } from './../../mappingSystem/MappingSystem';
import { MappingContext } from './../../mappingContext/MappingContext';
import { Component,  ViewChild } from '@angular/core';
import { LazyLoadEvent, ConfirmationService, TreeNode, Message } from 'primeng/primeng';
import { FormsModule } from '@angular/forms';
import { WorkersService } from '../worker.service';
import { SharedService } from './../../../shared.service';
import { FormGroup, FormBuilder } from '@angular/forms';
import * as FileSaver from 'file-saver';
import { DialogModule, Dialog } from 'primeng/components/dialog/dialog';
import {ProgressSpinnerModule} from 'primeng/components/progressspinner/progressspinner';
import { Timeouts } from 'selenium-webdriver';

@Component({
    selector: 'export',
    templateUrl: './export.component.html',
    styleUrls: ['./../../global.css'],
    providers: [WorkersService, ConfirmationService]
})
export class ExportComponent {
    value = 0;
    workerForm: FormGroup;
    selectedExportWorker: WorkerExport;
    selectedMappingContext: MappingContext;
    selectedMappingSystem: MappingSystem;
    selectedCatalog: Catalog;
    catalogues: Catalog[] = [];
    workerExportList: WorkerExport[] = [];
    mappingSystems: MappingSystem[] = [];
    blankObject: Catalog = new Catalog(0, 'TOUS', 'TOUS', null);
    blankObjectMS: MappingSystem = new MappingSystem(0, 'TOUS', null, null, null, null, null);
    blanckObjectMSAllInAZip : MappingSystem = new MappingSystem(100, 'TOUS DANS UN ZIP', null, null, null, null, null);
    isHiddenCatalogue = false;
    isHiddenMappingSystem = false;
    filesTree2: TreeNode[] = [];
    selectedFile: TreeNode;
    msgs: Message[] = [];
    display: Boolean = false;
    response: Response;
    @ViewChild('dialog') dialog: DialogModule;
    @ViewChild('spinner') spinner: ProgressSpinnerModule;

    constructor(private workersService: WorkersService, private api: SharedService,
        fb: FormBuilder, private catalogService: CatalogService, private mappingSystemService: MappingSystemService,
        private exportService: ExportService, private confirmationService: ConfirmationService, private http: Http) {

        this.workerExportList.push(new WorkerExport('catalogueExport', 'Export des catalogues'));
        this.workerExportList.push(new WorkerExport('mappingExportV1_0', 'Export des mappings S1F0'));
        this.workerExportList.push(new WorkerExport('mappingExport', 'Export des mappings'));
        this.workerExportList.push(new WorkerExport('release', 'Livraison'));
        this.workerExportList.push(new WorkerExport('summaryExport', 'Export du rapport XLS - mapping des scopes'));
        this.workerExportList.push(new WorkerExport('koalaExport', 'Export koala'));
        this.workerExportList.push(new WorkerExport('pamdaExport', 'Export pamda'));
        this.workerExportList.push(new WorkerExport('orphanExport', 'Export orphelins - entités non mappées'));
        this.workerExportList.push(new WorkerExport('hierarchyValidator', 'Validation hiérarchie - entités sans relation'));
        this.workerExportList.push(new WorkerExport('dataExport', 'Export des données'));

        this.workerForm = fb.group({
            'selectedExportWorker': '',
            'selectedCatalog': this.blankObject,
            'selectedMappingSystem': this.blankObjectMS
        })

        this.selectedCatalog = this.blankObject;
        this.selectedMappingSystem = this.blankObjectMS;

        this.api.getDataMappingContext().subscribe(_sharingData => {
            this.selectedMappingContext = _sharingData;
            if (_sharingData) {
                this.exportService.getByMappingCOntext(_sharingData.id).subscribe(data => {
                    this.createTree(data, this.filesTree2, null);
                    console.log(this.filesTree2);
                });
            }
        });
    }

    ngOnInit() {
        localStorage.removeItem('mapping');
        localStorage.removeItem('page');
        this.api.getDataMappingContext().subscribe(mappingContext => {
            if (mappingContext != null) {
                this.selectedMappingContext = mappingContext;
                this.mappingSystemService.getByMappingContext(this.selectedMappingContext.id).subscribe(data => this.mappingSystems = data);
                this.catalogService.getCatalogByMappingContext(this.selectedMappingContext.id).subscribe(data => this.catalogues = data);
            }
        });
    }

    exportCatalogue() {
       return this.workersService.exportCatalogue(new WorkerParameterInfo()).subscribe();
    }

    selectWorker() {
        this.value = 0;
        if (this.selectedExportWorker != null && (
            this.selectedExportWorker.code === 'catalogueExport' ||
            this.selectedExportWorker.code === 'dataExport')) {
            this.isHiddenCatalogue = false;
        } else {
            this.isHiddenCatalogue = true ;
        }

        if (this.selectedExportWorker != null && this.selectedExportWorker.code === 'koalaExport') {
            this.isHiddenMappingSystem = false;
        } else {
            this.isHiddenMappingSystem = true;
        }
    }

    executer() {
        this.value = 60;
        let workerParameterInfo = new WorkerParameterInfo();
        workerParameterInfo.currentMappingContext = this.selectedMappingContext.id;
        workerParameterInfo.disabledByUser = false;
        if (this.selectedExportWorker.code === 'catalogueExport') {
            this.display = true;
            workerParameterInfo.catalogueIdOrALL = this.selectedCatalog.id.toString();
            this.workersService.exportCatalogue(workerParameterInfo).subscribe((res: Response) => {
                console.log('response catalogueExport :', res);
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'mappingExportV1_0') {
            this.display = true;
            this.workersService.exportMappingV10(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'mappingExport') {
            this.display = true;
            this.workersService.exportMapping(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'koalaExport') {
            this.display = true;
            workerParameterInfo.mappingSystemIdOrALL = this.selectedMappingSystem.id.toString();
            console.log('koala workerParameterInfo :', workerParameterInfo.mappingSystemIdOrALL);
            this.workersService.exportKoala(workerParameterInfo).subscribe((res: Response) => {
                console.log(res);
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'release') {
            this.display = true;
            this.workersService.exportLivraison(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'summaryExport') {
            this.display = true;
            this.workersService.exportSummary(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'pamdaExport') {
            this.display = true;
            this.workersService.exportPamda(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'orphanExport') {
            this.display = true;
            this.workersService.exportOrphan(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'hierarchyValidator') {
            this.display = true;
            this.workersService.validateHierarchy(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        } else if (this.selectedExportWorker.code === 'dataExport') {
            this.display = true;
            workerParameterInfo.catalogueIdOrALL = this.selectedCatalog.id.toString();
            this.workersService.exportData(workerParameterInfo).subscribe((res: Response) => {
                this.display = false;
                this.refresh();
            });
        }
        this.value = 90;
        this.refresh();
        this.value = 100;
    }

    createTree(data: any[], tree: TreeNode[], parent: TreeNode) {
        // console.log('creating Tree From: ', data);

        data.forEach(dir => {
            let treeNode: TreeNode = {
                label: '',
                data: '',
                children: [],
                leaf: false,
                expandedIcon: '',
                collapsedIcon: '',
                icon: '',
                expanded: true,
                parent: {}
            };

            if (dir.leaf === false) {
                treeNode.label = dir.label;
                treeNode.expandedIcon = 'fa-folder-open';
                treeNode.collapsedIcon = 'fa-folder';
                treeNode.parent = parent;
                this.createTree(dir.children, treeNode.children, treeNode)
                tree.push(treeNode);
            } else {
                treeNode.label = dir.label;
                treeNode.leaf = true;
                treeNode.data = dir.data;
                treeNode.parent = parent;
                if (treeNode.label.endsWith('zip')) {
                    treeNode.icon = 'fa-file-archive';
                } else if (treeNode.label.endsWith('xml')) {
                    treeNode.icon = 'fa-file-code';
                } else if (treeNode.label.endsWith('xls')) {
                    treeNode.icon = 'fa-file-excel';
                } else if (treeNode.label.endsWith('txt')) {
                    treeNode.icon = 'fa-file';
                } else {
                    treeNode.icon = 'fa-file';
                }
                tree.push(treeNode);
            }
        });
    }


    confirmDelete() {
        this.confirmationService.confirm({
            message: 'Êtes-vous sûr de vouloir supprimer cet objet?',
            header: 'Confirmation de suppression',
            icon: 'fa fa-trash',
            accept: () => {
                this.deleteFile();
            }
        });
    }

    nodeSelect(event) {
        if (event.node.leaf === false) {
            this.selectedFile = null;
        }
    }

    deleteFile() {
        this.exportService.delete(this.selectedFile.data).subscribe(() => {
            this.selectedFile.parent.children.splice(this.selectedFile.parent.children.findIndex(
                child => child.data === this.selectedFile.data), 1);
            this.showSuccess('Fichier supprimé avec succès');
        });
    }


    downloadFile() {
        const headers = new Headers();
        headers.append('Content-Type', 'application/json');
        let requestOptions = new RequestOptions({
            headers: headers,
            responseType: ResponseContentType.Blob, // dont forget to import the enum
            // In case you get Module not found: Error: Can't resolve '@angular/http/src/enums', just use 3 instead ex 'responseType:3'
        });
        let workerParameterInfo = new WorkerParameterInfo();
        workerParameterInfo.pathFile = this.selectedFile.data;

        let bodyString = JSON.stringify(workerParameterInfo);
        this.http.post(`${environment.url.base}${environment.url.pamda.downloadFile}`, bodyString, requestOptions).subscribe(res => {
            FileSaver.saveAs(res.blob(), this.selectedFile.label)
        });

    }


    refresh() {
        this.filesTree2 = [];
        if (this.selectedMappingContext) {
            this.exportService.getByMappingCOntext(this.selectedMappingContext.id).subscribe(data => {
                this.createTree(data, this.filesTree2, null);
                // console.log(this.filesTree2);
            })
        }
    }

    showError() {
        this.msgs = [];
        this.msgs.push({ severity: 'error', summary: 'Message d\'erreur', detail: 'Vous ne pouvez pas supprimer ce catalogue' });
    }

    showSuccess(details) {
        this.msgs = [];
        this.msgs.push({ severity: 'success', summary: 'Succès', detail: details });
    }
}

Может кто-нибудь, пожалуйста, помогите мне ??