34 lines
1.4 KiB
JavaScript
34 lines
1.4 KiB
JavaScript
import { operate } from '../util/lift';
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import { noop } from '../util/noop';
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import { createOperatorSubscriber } from './OperatorSubscriber';
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import { innerFrom } from '../observable/innerFrom';
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export function debounce(durationSelector) {
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return operate((source, subscriber) => {
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let hasValue = false;
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let lastValue = null;
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let durationSubscriber = null;
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const emit = () => {
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durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();
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durationSubscriber = null;
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if (hasValue) {
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hasValue = false;
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const value = lastValue;
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lastValue = null;
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subscriber.next(value);
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}
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};
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source.subscribe(createOperatorSubscriber(subscriber, (value) => {
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durationSubscriber === null || durationSubscriber === void 0 ? void 0 : durationSubscriber.unsubscribe();
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hasValue = true;
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lastValue = value;
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durationSubscriber = createOperatorSubscriber(subscriber, emit, noop);
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innerFrom(durationSelector(value)).subscribe(durationSubscriber);
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}, () => {
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emit();
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subscriber.complete();
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}, undefined, () => {
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lastValue = durationSubscriber = null;
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}));
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});
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}
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//# sourceMappingURL=debounce.js.map
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