Admin/Sources/HeartTrack/Shared/MainLayout.razor.cs

using HeartTrack.Services;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Components;

namespace HeartTrack.Shared
{
    public partial class MainLayout
    {
        [Inject]
        public NavigationManager NavigationManager { get; set; }

        private bool collapseNavMenu = true;

        private string? NavMenuCssClass => collapseNavMenu ? "collapse" : null;

        public void ToggleNavMenu()
        {
            collapseNavMenu = !collapseNavMenu;
        }

        public bool getCollapseNavMenu()
        {
            return this.collapseNavMenu;
        }
    }
}