# IntersectionObserver constructor

IntersectionObserver(IntersectionObserverCallback callback, [ Map options ])

## Implementation

    factory IntersectionObserver(IntersectionObserverCallback callback,
        [Map options]) {
      if (options != null) {
        var options_1 = convertDartToNative_Dictionary(options);
        return IntersectionObserver._create_1(callback, options_1);
      }
      return IntersectionObserver._create_2(callback);
    }