Connected.Components/Services/ReseizeObserver/IResizeObserver.cs

using Connected.Interop;
using Microsoft.AspNetCore.Components;

namespace Connected.Services;


public delegate void SizeChanged(IDictionary<ElementReference, BoundingClientRect> changes);

public interface IResizeObserver : IAsyncDisposable, IDisposable
{
   Task<BoundingClientRect> Observe(ElementReference element);
   Task<IEnumerable<BoundingClientRect>> Observe(IEnumerable<ElementReference> elements);
   Task Unobserve(ElementReference element);

   double GetWidth(ElementReference reference);
   double GetHeight(ElementReference reference);
   BoundingClientRect GetSizeInfo(ElementReference reference);

   event SizeChanged OnResized;

   bool IsElementObserved(ElementReference reference);
}