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- import { ObservableInputTuple, OperatorFunction } from '../types';
- import { concat } from './concat';
- /**
- * Emits all of the values from the source observable, then, once it completes, subscribes
- * to each observable source provided, one at a time, emitting all of their values, and not subscribing
- * to the next one until it completes.
- *
- * `concat(a$, b$, c$)` is the same as `a$.pipe(concatWith(b$, c$))`.
- *
- * ## Example
- *
- * Listen for one mouse click, then listen for all mouse moves.
- *
- * ```ts
- * import { fromEvent, map, take, concatWith } from 'rxjs';
- *
- * const clicks$ = fromEvent(document, 'click');
- * const moves$ = fromEvent(document, 'mousemove');
- *
- * clicks$.pipe(
- * map(() => 'click'),
- * take(1),
- * concatWith(
- * moves$.pipe(
- * map(() => 'move')
- * )
- * )
- * )
- * .subscribe(x => console.log(x));
- *
- * // 'click'
- * // 'move'
- * // 'move'
- * // 'move'
- * // ...
- * ```
- *
- * @param otherSources Other observable sources to subscribe to, in sequence, after the original source is complete.
- * @return A function that returns an Observable that concatenates
- * subscriptions to the source and provided Observables subscribing to the next
- * only once the current subscription completes.
- */
- export function concatWith<T, A extends readonly unknown[]>(
- ...otherSources: [...ObservableInputTuple<A>]
- ): OperatorFunction<T, T | A[number]> {
- return concat(...otherSources);
- }
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