mempool/frontend/src/app/shared/components/truncate/truncate.component.html

<span class="truncate" [style.max-width]="maxWidth ? maxWidth + 'px' : null">
    <ng-container *ngIf="link">
      <a [routerLink]="link" class="truncate-link">
        <ng-container *ngIf="rtl; then rtlTruncated; else ltrTruncated;"></ng-container>
      </a>
    </ng-container>
    <ng-container *ngIf="!link">
      <ng-container *ngIf="rtl; then rtlTruncated; else ltrTruncated;"></ng-container>
    </ng-container>
    <ng-content></ng-content>
</span>

<ng-template #ltrTruncated>
  <span class="first">{{text.slice(0,-lastChars)}}</span><span class="last-four">{{text.slice(-lastChars)}}</span>
</ng-template>

<ng-template #rtlTruncated>
  <span class="first">{{text.slice(lastChars)}}</span><span class="last-four">{{text.slice(0,lastChars)}}</span>
</ng-template>