debounce
Emits a value from the source Observable only after a particular time span determined by another Observable has passed without another source emission.
Parameters
| durationSelector |
A function that receives a value from the source Observable, for computing the timeout duration for each source value, returned as an Observable or a Promise. |
Returns
MonoTypeOperatorFunction<T>: An Observable that delays the emissions of the source
Observable by the specified duration Observable returned by
durationSelector, and may drop some values if they occur too frequently.
Description
It's like debounceTime, but the time span of
emission silence is determined by a second Observable.
debounce delays values emitted by the source Observable, but drops previous
pending delayed emissions if a new value arrives on the source Observable.
This operator keeps track of the most recent value from the source
Observable, and spawns a duration Observable by calling the
durationSelector function. The value is emitted only when the duration
Observable emits a value or completes, and if no other value was emitted on
the source Observable since the duration Observable was spawned. If a new
value appears before the duration Observable emits, the previous value will
be dropped and will not be emitted on the output Observable.
Like debounceTime, this is a rate-limiting operator, and also a
delay-like operator since output emissions do not necessarily occur at the
same time as they did on the source Observable.
Example
Emit the most recent click after a burst of clicks