@if (contents?.length) {
    <div class="text-base text-file-viewer">
        <pre *ngFor="let line of contents; let i = index" class="line">
            <span class="line-number">{{ i + 1 }}</span>
            <span>{{ line }}</span>
        </pre>
    </div>
} @else {
    <div class="text-base text-file-viewer">The file is empty or it does not exist.</div>
}