50 lines
2.0 KiB
JavaScript
50 lines
2.0 KiB
JavaScript
|
/** PURE_IMPORTS_START .._scheduler_async,.._operators_delay PURE_IMPORTS_END */
|
||
|
|
import { async } from '../scheduler/async';
|
||
|
|
import { delay as higherOrder } from '../operators/delay';
|
||
|
|
/**
|
||
|
|
* Delays the emission of items from the source Observable by a given timeout or
|
||
|
|
* until a given Date.
|
||
|
|
*
|
||
|
|
* <span class="informal">Time shifts each item by some specified amount of
|
||
|
|
* milliseconds.</span>
|
||
|
|
*
|
||
|
|
* <img src="./img/delay.png" width="100%">
|
||
|
|
*
|
||
|
|
* If the delay argument is a Number, this operator time shifts the source
|
||
|
|
* Observable by that amount of time expressed in milliseconds. The relative
|
||
|
|
* time intervals between the values are preserved.
|
||
|
|
*
|
||
|
|
* If the delay argument is a Date, this operator time shifts the start of the
|
||
|
|
* Observable execution until the given date occurs.
|
||
|
|
*
|
||
|
|
* @example <caption>Delay each click by one second</caption>
|
||
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
||
|
|
* var delayedClicks = clicks.delay(1000); // each click emitted after 1 second
|
||
|
|
* delayedClicks.subscribe(x => console.log(x));
|
||
|
|
*
|
||
|
|
* @example <caption>Delay all clicks until a future date happens</caption>
|
||
|
|
* var clicks = Rx.Observable.fromEvent(document, 'click');
|
||
|
|
* var date = new Date('March 15, 2050 12:00:00'); // in the future
|
||
|
|
* var delayedClicks = clicks.delay(date); // click emitted only after that date
|
||
|
|
* delayedClicks.subscribe(x => console.log(x));
|
||
|
|
*
|
||
|
|
* @see {@link debounceTime}
|
||
|
|
* @see {@link delayWhen}
|
||
|
|
*
|
||
|
|
* @param {number|Date} delay The delay duration in milliseconds (a `number`) or
|
||
|
|
* a `Date` until which the emission of the source items is delayed.
|
||
|
|
* @param {Scheduler} [scheduler=async] The IScheduler to use for
|
||
|
|
* managing the timers that handle the time-shift for each item.
|
||
|
|
* @return {Observable} An Observable that delays the emissions of the source
|
||
|
|
* Observable by the specified timeout or Date.
|
||
|
|
* @method delay
|
||
|
|
* @owner Observable
|
||
|
|
*/
|
||
|
|
export function delay(delay, scheduler) {
|
||
|
|
if (scheduler === void 0) {
|
||
|
|
scheduler = async;
|
||
|
|
}
|
||
|
|
return higherOrder(delay, scheduler)(this);
|
||
|
|
}
|
||
|
|
//# sourceMappingURL=delay.js.map
|