is-observable

What is is-observable?

The is-observable package is used to check if a value is an RxJS Observable. RxJS Observables are a core part of reactive programming, which involves working with asynchronous data streams. This package provides a simple utility function to determine if a given object conforms to the Observable contract.

What are is-observable's main functionalities?

Check if a value is an Observable

This feature allows developers to verify if a particular value is an RxJS Observable. This is useful in scenarios where type checking is necessary before performing operations on the value assumed to be an Observable.

const isObservable = require('is-observable');
const { Observable } = require('rxjs');

const obs = new Observable(subscriber => {
  subscriber.next('Hello World');
  subscriber.complete();
});

console.log(isObservable(obs)); // true
console.log(isObservable({})); // false

Other packages similar to is-observable

rxjs

RxJS is a comprehensive library for reactive programming using Observables. It not only provides the Observable class but also a wide array of operators for composing asynchronous and event-based programs. Compared to is-observable, RxJS is much more extensive, offering creation, transformation, filtering, and combination capabilities for Observables.

zen-observable

Zen Observable is a lightweight implementation of Observables. It provides the basic Observable functionality along with some utilities for creating and working with Observables. Unlike is-observable, which only checks if a value is an Observable, zen-observable allows for the creation and manipulation of Observables.

README

is-observable

Check if a value is an Observable

Install

$ npm install is-observable

Usage

const isObservable = require('is-observable');

isObservable(Observable.of(1, 2));
//=> true

Related

• observable-to-promise - Convert an Observable to a Promise

License

MIT © Sindre Sorhus