You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
2.5 KiB
55 lines
2.5 KiB
2 years ago
|
"use strict";
|
||
|
|
var async_1 = require('../scheduler/async');
|
||
|
|
var debounceTime_1 = require('../operators/debounceTime');
|
||
|
|
/**
|
||
|
|
* Emits a value from the source Observable only after a particular time span
|
||
|
|
* has passed without another source emission.
|
||
|
|
*
|
||
|
|
* <span class="informal">It's like {@link delay}, but passes only the most
|
||
|
|
* recent value from each burst of emissions.</span>
|
||
|
|
*
|
||
|
|
* <img src="./img/debounceTime.png" width="100%">
|
||
|
|
*
|
||
|
|
* `debounceTime` 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 emits that only when `dueTime` enough time has passed
|
||
|
|
* without any other value appearing on the source Observable. If a new value
|
||
|
|
* appears before `dueTime` silence occurs, the previous value will be dropped
|
||
|
|
* and will not be emitted on the output Observable.
|
||
|
|
*
|
||
|
|
* This is a rate-limiting operator, because it is impossible for more than one
|
||
|
|
* value to be emitted in any time window of duration `dueTime`, but it is also
|
||
|
|
* a delay-like operator since output emissions do not occur at the same time as
|
||
|
|
* they did on the source Observable. Optionally takes a {@link IScheduler} for
|
||
|
|
* managing timers.
|
||
|
|
*
|
||
|
|
* @example <caption>Emit the most recent click after a burst of clicks</caption>
|
||
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
||
|
|
* var result = clicks.debounceTime(1000);
|
||
|
|
* result.subscribe(x => console.log(x));
|
||
|
|
*
|
||
|
|
* @see {@link auditTime}
|
||
|
|
* @see {@link debounce}
|
||
|
|
* @see {@link delay}
|
||
|
|
* @see {@link sampleTime}
|
||
|
|
* @see {@link throttleTime}
|
||
|
|
*
|
||
|
|
* @param {number} dueTime The timeout duration in milliseconds (or the time
|
||
|
|
* unit determined internally by the optional `scheduler`) for the window of
|
||
|
|
* time required to wait for emission silence before emitting the most recent
|
||
|
|
* source value.
|
||
|
|
* @param {Scheduler} [scheduler=async] The {@link IScheduler} to use for
|
||
|
|
* managing the timers that handle the timeout for each value.
|
||
|
|
* @return {Observable} An Observable that delays the emissions of the source
|
||
|
|
* Observable by the specified `dueTime`, and may drop some values if they occur
|
||
|
|
* too frequently.
|
||
|
|
* @method debounceTime
|
||
|
|
* @owner Observable
|
||
|
|
*/
|
||
|
|
function debounceTime(dueTime, scheduler) {
|
||
|
|
if (scheduler === void 0) { scheduler = async_1.async; }
|
||
|
|
return debounceTime_1.debounceTime(dueTime, scheduler)(this);
|
||
|
|
}
|
||
|
|
exports.debounceTime = debounceTime;
|
||
|
|
//# sourceMappingURL=debounceTime.js.map
|