DebounceStreamTransformer<T> class

Transforms a Stream so that will only emit items from the source sequence if a window has completed, without the source sequence emitting another item.

This window is created after the last debounced event was emitted. You can use the value of the last debounced event to determine the length of the next window.

A window is open until the first window event emits.

The debounce StreamTransformer filters out items emitted by the source Stream that are rapidly followed by another emitted item.

Interactive marble diagram


Stream.fromIterable([1, 2, 3, 4])
  .debounceTime(Duration(seconds: 1))
  .listen(print); // prints 4


DebounceStreamTransformer(Stream window(T event))
Constructs a StreamTransformer which buffers events into a List and emits this List whenever the current window fires. [...]


closeWindowWhen bool Function(List<T> queue)
Predicate which determines when the current window should close
final, inherited
dispatchOnClose bool
Toggle to prevent, or allow the final set of events to be dispatched when the source Stream closes
final, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
ignoreEmptyWindows bool
Toggle to prevent, or allow windows that contain no events to be dispatched
final, inherited
maxLengthQueue int
Maximum length of the buffer. Specify this value to avoid running out of memory when adding too many events to the buffer. If it's null, maximum length of the buffer is unlimited.
final, inherited
onWindowEnd → T Function(List<T> queue)
Handler which fires when the window closes
final, inherited
onWindowStart → T Function(T event)
Handler which fires when the window opens
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
startBufferEvery int
Used to skip an amount of events
final, inherited
strategy → WindowStrategy
Determines how the window is created
final, inherited
windowStreamFactory Stream Function(T event)
Factory method used to create the Stream which will be buffered
final, inherited


bind(Stream<T> stream) Stream<T>
Transforms the provided stream. [...]
cast<RS, RT>() StreamTransformer<RS, RT>
Provides a StreamTransformer<RS, RT> view of this stream transformer. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toString() String
A string representation of this object. [...]


operator ==(Object other) bool
The equality operator. [...]