pdnsmanager/frontend/src/app/partials/select/select.component.html

<div class="dropdown">
    <a class="btn btn-sm dropdown-toggle-left no-shadow mw-100 text-truncate" (click)="toggleOpen()" [class.disabled]="!enabled">
        {{ buttonText() }}
    </a>
    <div class="dropdown-menu" [class.show]="open" style="overflow-y: auto;">
        <span class="dropdown-item cursor-pointer" *ngIf="notNull === false" (click)="reset()">Clear</span>
        <div class="dropdown-divider" *ngIf="notNull === false"></div>
        <div class="scrolling">
            <span *ngFor="let option of options" [class.active]="isActive(option)" class="dropdown-item cursor-pointer"
                (click)="onClick(option)">{{ option }}</span>
        </div>
    </div>
</div>