combineLatest

Combines multiple Observables to create an Observable whose values are calculated from the latest values of each of its input Observables.

This method relies on combineLatestOperator of rxjs.

The main difference with combineLatestOperator is in case of empty parameters. If the parameter is empty (empty array or empty object), the result will be also empty.

ATTENTION: this version doesn’t support scheduler nor mapper as last argument like in combineLatestOperator.

Available since v1.0.0

Import

import { combineLatest } from '@helpers4/observable';

Signature

combineLatest<A extends readonly unknown[]>(sources: readonly [ObservableInputTuple<A>]): Observable<A>

Parameters

Parameter	Type	Description
sources	readonly [ObservableInputTuple<A>]

Returns

Observable<A> —

Examples

Combine array of observables

Combines an array of observables into one that emits arrays of their latest values.

combineLatest([of(1), of(2), of(3)])
// emits [1, 2, 3]

Handle empty array

Returns an observable that emits an empty array when given no sources.

combineLatest([])
// emits []

Source

View source on GitHub