addIntersectionObserver method

bool addIntersectionObserver(
  1. IntersectionObserver observer,
  2. List<double> thresholds
)

Implementation

bool addIntersectionObserver(
    IntersectionObserver observer, List<double> thresholds) {
  if (_intersectionObserverList.contains(observer)) {
    return false;
  }
  if (enableWebFCommandLog) {
    domLogger.fine(
        '[IntersectionObserver] attach target=$pointer observer=${observer.pointer} thresholds=$thresholds');
  }
  renderStyle.addIntersectionChangeListener(
      _handleIntersectionObserver, thresholds);
  _intersectionObserverList.add(observer);
  _thresholds = thresholds;
  return true;
}