capture method

StreamSubscription<T> capture (
  1. void onData(
    1. T event
    )
)

Adds a capturing subscription to this stream.

If the target of the event is a descendant of the element from which this stream derives then onData is called before the event propagates down to the target. This is the opposite of bubbling behavior, where the event is first processed for the event target and then bubbles upward.

Other resources

Implementation

StreamSubscription<T> capture(void onData(T event));