BlazorStart/Start/Client/Components/BookmarkContainer.razor

<div class="activeBookmarkContainer">
    @if (this.Container == null)
    {
        <div class="empty">
            <div class="empty-icon">
                <div class="loading loading-icon"></div>
            </div>
            <p class="empty-title h5">Loading Bookmarks</p>
        </div>
        <p class="text-center">Loading Bookmarks</p>
    }
    else if (!this.Container.BookmarkGroups?.Any() ?? true)
    {
        <div class="empty">
            <div class="empty-icon">
                <i class="icon icon-3x icon-bookmark"></i>
            </div>
            <p class="empty-title h5">No Bookmark Groups</p>
        </div>
    }
    else
    {
        foreach (BookmarkGroupDto group in this.Container.BookmarkGroups!)
        {
            <BookmarkGroup Group="group" />
        }
    }
</div>

@code {
    [Parameter]
    public BookmarkContainerDto? Container { get; set; }
}