Common RxJS Operations in Angular
- Observable Creation:
of()
: Creates an observable that emits a sequence of values.from()
: Converts an array, promise, or iterable into an observable.ajax()
: Performs an XMLHttpRequest with the provided options and returns an observable.
- Combination Operators:
merge()
: Combines multiple observables into one by merging their emissions.combineLatest()
: Combines the latest values from multiple observables into an array or object.forkJoin()
: Combines the last values emitted by multiple observables and emits a single value when all observables complete.
- Filtering Operators:
filter()
: Emits only those values from an observable that satisfy a specified condition.distinctUntilChanged()
: Emits a value only if it is different from the previous value.debounceTime()
: Emits a value from the source observable only after a specified duration has passed without any other value being emitted.
- Transformation Operators:
map()
: Transforms each value emitted by an observable into a new value.pluck()
: Extracts the value of a specified property from each emitted object.scan()
: Applies an accumulator function to each value emitted by an observable and emits each intermediate result.
- Error Handling Operators:
catchError()
: Handles errors emitted by the source observable and returns a new observable or throws an error.retry()
: Resubscribes to the source observable a specified number of times if an error occurs.
- Utility Operators:
tap()
: Performs side effects for each emission on the source observable without modifying the emitted values.delay()
: Delays the emissions from the source observable by a specified duration.
RxJS operations in Angular
Angular, a popular front-end framework, helps to build responsive and scalable applications. At the core of Angular lies RxJS (Reactive Extensions for JavaScript), a powerful library for handling asynchronous operations and event-based programming. In this article, we’ll explore how RxJS helps Angular developers manage complex asynchronous tasks and streamline data flow within their applications.
Prerequisites:
Table of Content
- What are RxJS Operations?
- Uses of RxJS operations
- Common RxJS Operations in Angular
- Steps to create Angular Project
- Common RxJS operators