/// <summary>
/// Create an observer instance with a unique id, adding it
/// to the list of observers.
/// </summary>
/// <param name="onIntersectUpdate">On an intersection update, pass the entries to the callback</param>
/// <param name="options">The intersection observer options</param>
/// <returns>The observer instance</returns>
public async Task <IntersectionObserver> Create(
Action <IList <IntersectionObserverEntry> > onIntersectUpdate,
IntersectionObserverOptions options = null
)
{
var callbackId = Guid.NewGuid().ToString();
await this.jsRuntime.InvokeAsync <object>(Constants.CREATE, this.dotnetObjRef, options);
return(this.CreateObserver(callbackId, onIntersectUpdate));
}
/// <summary>
/// Create an observer instance and immediately observe
/// the element.
/// </summary>
/// <param name="element">The element</param>
/// <param name="onIntersectUpdate">On an intersection update, pass the entries</param>
/// <param name="options">The intersection observer options</param>
/// <returns></returns>
public async Task <IntersectionObserver> Observe(
ElementReference element,
Action <IList <IntersectionObserverEntry> > onIntersectUpdate,
IntersectionObserverOptions options = null
)
{
var module = await this.moduleTask;
var callbackId = Guid.NewGuid().ToString();
await module.InvokeAsync <object>(Constants.OBSERVE, this.objectRef, callbackId, element, options);
return(this.CreateObserver(callbackId, onIntersectUpdate));
}
