rx-sample

rx-sample is a utility for working with RxJS in conjunction with Effector, making it easy to manage subscriptions to Observables using Effector events.

Installation

You can install the rx-sample package via npm:

npm install rx-sample

Quick Start

Usage Example

Here’s a basic example of how to use rxSample in your project:

import { Subject } from "rxjs";
import { createEvent } from "effector";
import { rxSample } from "rx-sample";

// Create Effector events
const mockChannel = new Subject();
const subscribe = createEvent();
const unsubscribe = createEvent();
const target = createEvent();

// Use rxSample
rxSample({
  source: mockChannel,
  subscribeOn: subscribe,
  unsubscribeOn: unsubscribe,
  target,
});

// Example usage of events
// Start subscription to mockChannel
sample({
  clock: subscribeTriggered, // Some event
  target: subscribe,
});

mockChannel.next("some data"); // Send data

sample({
  clock: unsubscribeTriggered, // Some event
  target: unsubscribe,
});

Parameter Description

The rxSample function takes a single argument — an object with four required parameters:

type Input<D> = {
  source: Observable<D>;
  subscribeOn: Event<unknown>;
  unsubscribeOn: Event<unknown>;
  target: EventCallable<D>;
};

type InputWithStore<D> = {
  source: Store<Observable<D>>;
  subscribeOn: Event<unknown>;
  unsubscribeOn: Event<unknown>;
  target: EventCallable<D>;
};

• source: Observable<D> — The Observable to subscribe to.
• subscribeOn: EventCallable<S> — An Effector event that triggers the subscription to source.
• unsubscribeOn: EventCallable<U> — An Effector event that triggers the unsubscription from source.
• target: EventCallable<D> — An Effector event where data from source will be sent, or a void event to execute side effects.

How It Works

• Subscribe to the Observable: When the subscribeOn event triggers, the function subscribes to the specified source and starts sending data from the Observable to the target.

• Unsubscribe from the Observable: When the unsubscribeOn event triggers, the function unsubscribes from source, freeing resources and stopping the data flow.

• Store the Subscription: The subscription is stored in an internal Effector store ($subscription), allowing easy unsubscription management and ensuring that the subscription is always properly terminated.

Detailed Example

Suppose we have an Observable representing a stream of messages, and we want to manage subscriptions to this stream using Effector events.

You can see example here: codesanbox

Common Use Cases

• Managing Real-Time Data Subscriptions: For example, news feeds, chat messages, server updates.

• Integration with Existing Systems: rx-sample is ideal for scenarios where you need to manage subscriptions to Observables within your application using Effector events.

Additional info

Special thanks to VOISO frontend developers:

Arseniy

Andrey