delay method

Stream<T> delay(
  1. Duration duration

The Delay operator modifies its source Stream by pausing for a particular increment of time (that you specify) before emitting each of the source Stream’s items. This has the effect of shifting the entire sequence of items emitted by the Stream forward in time by that specified increment.

Interactive marble diagram


Stream.fromIterable([1, 2, 3, 4])
  .delay(Duration(seconds: 1))
  .listen(print); // [after one second delay] prints 1, 2, 3, 4 immediately


Stream<T> delay(Duration duration) =>