CaritasPWA/Shared/Services/ScrollLockRemover.cs

using Microsoft.JSInterop;
using System.Threading.Tasks;

namespace cwebplusApp.Shared.Services {

    // This class is only needed to work around a bug in MatDialogService.AskAsync.
    // It removes a class from body, which is erroneously left there after a call to AskAsync.
    // See https://github.com/SamProf/MatBlazor/issues/829 . REMOVE AS SOON AS THE BUG IS FIXED!
    public class ScrollLockRemover {

        private readonly IJSRuntime jsRuntime;

        public ScrollLockRemover(IJSRuntime _jsRuntime) {
            this.jsRuntime = _jsRuntime;
        }

        public async Task removeScrollLockAsync() {
            var reference = DotNetObjectReference.Create(this);
            await jsRuntime.InvokeVoidAsync("RemoveScrollLock", reference);
        }

    }
}