RxJS Operators By Example

A complete list of RxJS operators with clear explanations, relevant resources, and executable examples.

Prefer a complete list in alphabetical order?

Contents (By Operator Type)

Combination
- combineAll
- combineLatest ⭐
- concat ⭐
- concatAll
- endWith
- forkJoin
- merge ⭐
- mergeAll
- pairwise
- race
- startWith ⭐
- withLatestFrom ⭐
- zip
Conditional
Creation
- ajax ⭐
- create
- defer
- empty
- from ⭐
- fromEvent
- generate
- interval
- of ⭐
- range
- throw
- timer
Error Handling
- catch / catchError ⭐
- retry
- retryWhen
Filtering
- audit
- auditTime
- debounce
- debounceTime ⭐
- distinct
- distinctUntilChanged ⭐
- distinctUntilKeyChanged
- filter ⭐
- find
- first
- ignoreElements
- last
- sample
- single
- skip
- skipUntil
- skipWhile
- take ⭐
- takeLast
- takeUntil ⭐
- takeWhile
- throttle
- throttleTime
Multicasting
- multicast
- publish
- share ⭐
- shareReplay ⭐
Transformation
- buffer
- bufferCount
- bufferTime ⭐
- bufferToggle
- bufferWhen
- concatMap ⭐
- concatMapTo
- expand
- exhaustMap
- groupBy
- map ⭐
- mapTo
- mergeMap / flatMap ⭐
- mergeScan
- partition
- pluck
- reduce
- scan ⭐
- switchMap ⭐
- switchMapTo
- toArray
- window
- windowCount
- windowTime
- windowToggle
- windowWhen
Utility
- tap / do ⭐
- delay
- delayWhen
- dematerialize
- finalize / finally
- let
- repeat
- repeatWhen
- timeInterval
- timeout
- timeoutWith
- toPromise

⭐ - commonly used

Additional Resources

What Are Operators? 📰 - Official Docs
What Operators Are 🎥 💵 - André Staltz