API Reference

Application entry APIs:

public sealed class UltimateAppBuilder
{
    public static UltimateAppBuilder CreateDefaultBuilder();
    public UltimateAppBuilder UseRenderHost(Func<IRenderHost> renderHostFactory);
    public UltimateApp Build();
}

public sealed class UltimateApp : IAsyncDisposable
{
    public Window MainWindow { get; set; }
    public ValueTask<int> RunAsync(CancellationToken ct = default);
}

public sealed class Window
{
    public Window AttachGlobalStyle(CssModule styles);
    public Window Render(Func<ComponentContext, Element> render);
}

Lower-level component runtime APIs:

public sealed class ComponentApp : IAsyncDisposable
{
    public ComponentApp(Func<ComponentContext, Element> render);
    public ComponentApp(UltimateUiApp innerApp, Func<ComponentContext, Element> render);
    public UltimateUiApp InnerApp { get; }
    public Div HostElement { get; }
    public Task PendingRender { get; }
    public NodeHandle Mount();
    public ValueTask<NodeHandle> MountAsync(CancellationToken ct = default);
    public Task RenderAsync(CancellationToken ct = default);
    public void Flush();
    public ValueTask UseStylesAsync(CssModule module, CancellationToken ct = default);
}

public sealed class ComponentContext
{
    public HookState<T> UseState<T>(T initialValue);
    public ReducerState<TState, TAction> UseReducer<TState, TAction>(
        Func<TState, TAction, TState> reducer,
        TState initialState);
    public T UseMemo<T>(Func<T> factory, params object?[] dependencies);
    public void UseEffect(Action effect, params object?[] dependencies);
}

CSS APIs:

Css.Module(scope, rules);
Css.Class(localName, build);
Css.Rule(selector, build);

CssClass implicitly converts to string, so it can be assigned to element Class properties.