public class IdentityRevalidatingAuthenticationStateProvider : RevalidatingServerAuthenticationStateProvider
{

    protected override TimeSpan RevalidationInterval => TimeSpan.FromMinutes(30);

    protected override async Task<bool> ValidateAuthenticationStateAsync(
        AuthenticationState authenticationState, CancellationToken cancellationToken)
    {
     // ...
    }
}

public class PersistingRevalidatingAuthenticationStateProvider : RevalidatingServerAuthenticationStateProvider
{
    public PersistingRevalidatingAuthenticationStateProvider(
        ILoggerFactory loggerFactory,
        IServiceScopeFactory scopeFactory,
        PersistentComponentState state,
        IOptions<IdentityOptions> options)
        : base(loggerFactory)
    {
     // ...
    }

    protected override TimeSpan RevalidationInterval => TimeSpan.FromMinutes(30);

    protected override async Task<bool> ValidateAuthenticationStateAsync(
        AuthenticationState authenticationState, CancellationToken cancellationToken)
    {
     // ...
    }

    private async Task OnPersistingAsync()
    {
     // ...
                _state.PersistAsJson(nameof(UserInfo), new UserInfo
                {
                    UserId = userId,
                    Email = email,
                });
     // ...
    }
}

public class PersistentAuthenticationStateProvider(PersistentComponentState persistentState) : AuthenticationStateProvider
{
    private static readonly Task<AuthenticationState> _unauthenticatedTask =
        Task.FromResult(new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity())));

    public override Task<AuthenticationState> GetAuthenticationStateAsync()
    {
        if (!persistentState.TryTakeFromJson<UserInfo>(nameof(UserInfo), out var userInfo) || userInfo is null)
        {
            return _unauthenticatedTask;
        }

        Claim[] claims = [
            new Claim(ClaimTypes.NameIdentifier, userInfo.UserId),
            new Claim(ClaimTypes.Name, userInfo.Email),
            new Claim(ClaimTypes.Email, userInfo.Email) ];

        return Task.FromResult(
            new AuthenticationState(new ClaimsPrincipal(new ClaimsIdentity(claims,
                authenticationType: nameof(PersistentAuthenticationStateProvider)))));
    }
}

Simple i18n support for your Angular apps 

 Easy ways to create a translation mechanism for your Angular and Ionic applications that does not rely on third-party libraries.

In this article, I am going to show a quick and easy way to provide a translation (aka i18n) support for your Angular and Ionic applications. 

Angular directive (for version >= 2.x ) that makes the DOM element draggable. 

Version 9.1 of Angular Now Available — TypeScript 3.8, faster builds, and more 

Angular 2 - A Getting Started Guide for Beginners 

Weekly curated blogs and tools for Angular pros. 

Version 10.0.0 is here! This is a major release that spans the entire platform, including the framework, Angular Material, and the CLI. This release is smaller than typical; it has only been 4 months since we released version 9.0 of Angular.