@reactivex/rxjs

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class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { OuterSubscriber } from '../OuterSubscriber'; import { subscribeToResult } from '../util/subscribeToResult'; /** * Emits a value from the source Observable, then ignores subsequent source * values for a duration determined by another Observable, then repeats this * process. * * <span class="informal">It's like {@link throttleTime}, but the silencing * duration is determined by a second Observable.</span> * * <img src="./img/throttle.png" width="100%"> * * `throttle` emits the source Observable values on the output Observable * when its internal timer is disabled, and ignores source values when the timer * is enabled. Initially, the timer is disabled. As soon as the first source * value arrives, it is forwarded to the output Observable, and then the timer * is enabled by calling the `durationSelector` function with the source value, * which returns the "duration" Observable. When the duration Observable emits a * value or completes, the timer is disabled, and this process repeats for the * next source value. * * @example <caption>Emit clicks at a rate of at most one click per second</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var result = clicks.throttle(ev => Rx.Observable.interval(1000)); * result.subscribe(x => console.log(x)); * * @see {@link audit} * @see {@link debounce} * @see {@link delayWhen} * @see {@link sample} * @see {@link throttleTime} * * @param {function(value: T): Observable|Promise} durationSelector A function * that receives a value from the source Observable, for computing the silencing * duration for each source value, returned as an Observable or a Promise. * @return {Observable<T>} An Observable that performs the throttle operation to * limit the rate of emissions from the source. * @method throttle * @owner Observable */ export function throttle(durationSelector) { return this.lift(new ThrottleOperator(durationSelector)); } var ThrottleOperator = (function () { function ThrottleOperator(durationSelector) { this.durationSelector = durationSelector; } ThrottleOperator.prototype.call = function (subscriber, source) { return source._subscribe(new ThrottleSubscriber(subscriber, this.durationSelector)); }; return ThrottleOperator; }()); /** * We need this JSDoc comment for affecting ESDoc. * @ignore * @extends {Ignored} */ var ThrottleSubscriber = (function (_super) { __extends(ThrottleSubscriber, _super); function ThrottleSubscriber(destination, durationSelector) { _super.call(this, destination); this.destination = destination; this.durationSelector = durationSelector; } ThrottleSubscriber.prototype._next = function (value) { if (!this.throttled) { this.tryDurationSelector(value); } }; ThrottleSubscriber.prototype.tryDurationSelector = function (value) { var duration = null; try { duration = this.durationSelector(value); } catch (err) { this.destination.error(err); return; } this.emitAndThrottle(value, duration); }; ThrottleSubscriber.prototype.emitAndThrottle = function (value, duration) { this.add(this.throttled = subscribeToResult(this, duration)); this.destination.next(value); }; ThrottleSubscriber.prototype._unsubscribe = function () { var throttled = this.throttled; if (throttled) { this.remove(throttled); this.throttled = null; throttled.unsubscribe(); } }; ThrottleSubscriber.prototype.notifyNext = function (outerValue, innerValue, outerIndex, innerIndex, innerSub) { this._unsubscribe(); }; ThrottleSubscriber.prototype.notifyComplete = function () { this._unsubscribe(); }; return ThrottleSubscriber; }(OuterSubscriber)); //# sourceMappingURL=throttle.js.map</code></pre> </div> <footer class="footer"> Generated by <a href="https://esdoc.org">ESDoc<span data-ice="esdocVersion">(0.4.8)</span></a> </footer> <script src="script/search_index.js"></script> <script src="script/search.js"></script> <script src="script/pretty-print.js"></script> <script src="script/inherited-summary.js"></script> <script src="script/test-summary.js"></script> <script src="script/inner-link.js"></script> <script src="script/patch-for-local.js"></script> </body> </html>