IntersectionObserverInit constructor
Implementation
factory IntersectionObserverInit({
  _i3.Node? root,
  _i2.String? rootMargin,
  _i2.Object? threshold,
}) =>
    IntersectionObserverInit._(
      root: root ?? _i6.undefined,
      rootMargin: rootMargin,
      threshold: threshold ?? _i6.undefined,
    );