D-Net

<form [formGroup]="myForm">

    <!-- <div class="form-group" [ngClass]="{'has-error':!myForm.controls.page.valid && myForm.controls.page.dirty}">

        <label for="pageTag">Select Page</label>

        <select formControlName="page" id="pageTag" class="form-control">

            <option *ngFor="let page of availablePages" [value]="page._id">{{page.name}}</option>

        </select>

    </div> -->

    <div formArrayName="pages" class="form-group" [ngClass]="{'has-error':!myForm.controls.pages.valid && myForm.controls.pages.dirty}">

        <label for="pageNameTag">Page Name</label>

        <div id="pageNameTag">

          <pre class="card card-block card-header"><span *ngFor="let page of formPages; let i=index">{{page.name}}<span *ngIf="i<(formPages.length-1)">, </span></span></pre>

          <button type="button" (click)="toggle()">Add / Remove pages</button>

          <ng-container *ngIf="!myForm.value.isCollapsed" >

            <div *ngFor="let page of availablePages">

              <span>

                <span *ngIf="indexOfPageInForm(page._id) >= 0" class="activated" >

                    <input (click)="togglePage(false, page)" class="deactivate" src="assets/imgs/delete-icon.png" title="Disable" width="20" type="image" height="20">

                </span>

                <span *ngIf="indexOfPageInForm(page._id) < 0" class="deactivated" >

                    <input (click)="togglePage(true, page)" class="activate" src="assets/imgs/add-icon.png" title="Enable" width="20" type="image" height="20">

                </span>

                {{page.name}}

              </span>

            </div>

          </ng-container>

        </div>

    </div>

    <div class="form-group" [ngClass]="{'has-error':!myForm.controls.name.valid && myForm.controls.name.dirty}">

        <label for="divIdNameTag">Class Name</label>

        <input type="text" class="form-control" formControlName="name" id="divIdNameTag" placeholder="Class Name">

    </div>

    <input type="hidden" formControlName="_id">

</form>