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@xan/subject@0.2.0
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latest
alexanderharding/subject
Works with
This package works with Node.js, Deno, BrowsersIt is unknown whether this package works with Cloudflare Workers, Bun
It is unknown whether this package works with Cloudflare Workers
This package works with Node.js
This package works with Deno
It is unknown whether this package works with Bun
This package works with Browsers
•JSR Score100%•
Downloads21/wk
•
Publisheda month ago (0.2.0)

A lightweight, RxJS-inspired library implementing the Observer pattern in JavaScript. Features Subjects with AbortController-based unsubscription, supporting both synchronous and asynchronous producers.

@xan/subject

A set of tooling that encapsulates an object that acts as both an Observer and Observable.

Build

Automated by JSR.

Publishing

Automated by .github\workflows\publish.yml.

Running unit tests

Run deno task test or deno task test:ci to execute the unit tests via Deno.

Example

import { Subject } from "@xan/subject";
import { from } from "@xan/observable";

class Authenticator {
  readonly #events = new Subject<Event>();
  // Hide the Observer from the public API by exposing the Subject as an Observable.
  readonly events = from(this.#events);

  [Symbol.dispose]() {
    this.#events.return(); // Cleanup resources.
  }

  login() {
    // Execute some login logic...
    this.#events.next(new Event("login"));
  }

  logout() {
    // Execute some logout logic...
    this.#events.next(new Event("logout"));
  }
}

Glossary And Semantics

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Add Package

deno add jsr:@xan/subject

Import symbol

import * as subject from "@xan/subject";
or

Import directly with a jsr specifier

import * as subject from "jsr:@xan/subject";

Add Package

pnpm i jsr:@xan/subject
or (using pnpm 10.8 or older)
pnpm dlx jsr add @xan/subject

Import symbol

import * as subject from "@xan/subject";

Add Package

yarn add jsr:@xan/subject
or (using Yarn 4.8 or older)
yarn dlx jsr add @xan/subject

Import symbol

import * as subject from "@xan/subject";

Add Package

vlt install jsr:@xan/subject

Import symbol

import * as subject from "@xan/subject";

Add Package

npx jsr add @xan/subject

Import symbol

import * as subject from "@xan/subject";

Add Package

bunx jsr add @xan/subject

Import symbol

import * as subject from "@xan/subject";