| /** PURE_IMPORTS_START .._operators_delayWhen PURE_IMPORTS_END */ |
| import { delayWhen as higherOrder } from '../operators/delayWhen'; |
| /** |
| * Delays the emission of items from the source Observable by a given time span |
| * determined by the emissions of another Observable. |
| * |
| * <span class="informal">It's like {@link delay}, but the time span of the |
| * delay duration is determined by a second Observable.</span> |
| * |
| * <img src="./img/delayWhen.png" width="100%"> |
| * |
| * `delayWhen` time shifts each emitted value from the source Observable by a |
| * time span determined by another Observable. When the source emits a value, |
| * the `delayDurationSelector` function is called with the source value as |
| * argument, and should return an Observable, called the "duration" Observable. |
| * The source value is emitted on the output Observable only when the duration |
| * Observable emits a value or completes. |
| * |
| * Optionally, `delayWhen` takes a second argument, `subscriptionDelay`, which |
| * is an Observable. When `subscriptionDelay` emits its first value or |
| * completes, the source Observable is subscribed to and starts behaving like |
| * described in the previous paragraph. If `subscriptionDelay` is not provided, |
| * `delayWhen` will subscribe to the source Observable as soon as the output |
| * Observable is subscribed. |
| * |
| * @example <caption>Delay each click by a random amount of time, between 0 and 5 seconds</caption> |
| * var clicks = Rx.Observable.fromEvent(document, 'click'); |
| * var delayedClicks = clicks.delayWhen(event => |
| * Rx.Observable.interval(Math.random() * 5000) |
| * ); |
| * delayedClicks.subscribe(x => console.log(x)); |
| * |
| * @see {@link debounce} |
| * @see {@link delay} |
| * |
| * @param {function(value: T): Observable} delayDurationSelector A function that |
| * returns an Observable for each value emitted by the source Observable, which |
| * is then used to delay the emission of that item on the output Observable |
| * until the Observable returned from this function emits a value. |
| * @param {Observable} subscriptionDelay An Observable that triggers the |
| * subscription to the source Observable once it emits any value. |
| * @return {Observable} An Observable that delays the emissions of the source |
| * Observable by an amount of time specified by the Observable returned by |
| * `delayDurationSelector`. |
| * @method delayWhen |
| * @owner Observable |
| */ |
| export function delayWhen(delayDurationSelector, subscriptionDelay) { |
| return higherOrder(delayDurationSelector, subscriptionDelay)(this); |
| } |
| //# sourceMappingURL=delayWhen.js.map |
