Roadmap to becoming a developer in 2022
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# Combination
Combination operators in RxJS are used to combine multiple observables into a single observable. There are several types of combination operators, including:
- Merge: merges multiple observables into a single observable that emits items from each source observable in a sequence.
- Concat: concatenates multiple observables into a single observable that emits the items from each source observable in sequence, one after the other.
- Zip: combines the items from multiple observables into a single observable by combining the items from each observable at a corresponding index.
- CombineLatest: combines the latest values from multiple observables into a single observable by emitting an item whenever any of the source observables emit an item.
- WithLatestFrom: combines the latest value from one observable with the latest values from multiple other observables.
- ForkJoin: combines the items from multiple observables into a single observable by emitting an item only after all of the source observables have emitted an item.
Further documentation can be found in the official RxJS documentation:
- Merge: https://rxjs.dev/api/operators/merge
- Concat: https://rxjs.dev/api/operators/concat
- Zip: https://rxjs.dev/api/operators/zip
- CombineLatest: https://rxjs.dev/api/operators/combineLatest
- WithLatestFrom: https://rxjs.dev/api/operators/withLatestFrom
- ForkJoin: https://rxjs.dev/api/index/function/forkJoin