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

<app-fa-icon *ngIf="order === 0" icon="sort" fixedWidth (click)="toggle()"></app-fa-icon>
<app-fa-icon *ngIf="order === 1" icon="sort-amount-asc" fixedWidth (click)="toggle()"></app-fa-icon>
<app-fa-icon *ngIf="order === -1" icon="sort-amount-desc" fixedWidth (click)="toggle()"></app-fa-icon>