markDownViewer.component.html

<div *ngIf="exercise">
    <div class="modal fade" id="mdModal">
        <div class="modal-dialog modal-lg modal-dialog-centered">
            <div class="modal-content">
                <!-- Modal Header -->
                <div class="modal-header">{{filename}}
                     <button type="button" class="close" data-dismiss="modal">&times;</button>
                </div>

                <!-- Modal body -->
                <div class="modal-body"> 
                <markdown [data]="content">
                </markdown>
                </div>

                <!-- Modal footer -->
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal"
                        jhiTranslate="exercise.close"></button>
                </div>

            </div>
        </div>
    </div>
</div>