https://github.com/electricessence/eventpublisher

A strongly typed protected event creator/publisher/signaler for use with TypeScript and JavaScript.
https://github.com/electricessence/eventpublisher

Last synced: 8 days ago
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A strongly typed protected event creator/publisher/signaler for use with TypeScript and JavaScript.

• Host: GitHub
• URL: https://github.com/electricessence/eventpublisher
• Owner: electricessence
• License: mit
• Created: 2020-04-25T21:53:14.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-11-14T04:15:14.000Z (about 2 years ago)
• Last Synced: 2024-04-27T06:20:15.984Z (7 months ago)
• Language: TypeScript
• Size: 53.7 KB
• Stars: 0
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# EventPublisher

[![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://github.com/electricessence/EventPublisher/blob/master/LICENSE)

[![npm version](https://img.shields.io/npm/v/event-publisher.svg?style=flat-square)](https://www.npmjs.com/package/event-publisher)

A strongly typed protected event creator/publisher/signaler for use with TypeScript and JavaScript.

## Purpose

* Provides an API that separates event listening/subscribing from dispatching/publishing.

* Simplifies adding events to any object.

## Example

```ts

import { Event, EventPublisher } from '../src/EventPublisher';

export class MyObservable {

	readonly start:Event;

	readonly update:Event;

	readonly complete:Event;

	private readonly _dispatcher:{

		start:EventPublisher,

		update:EventPublisher,

		complete:EventPublisher

	};

	constructor()

	{

		const start = new EventPublisher(1);

		const update = new EventPublisher();

		const complete = new EventPublisher(1);

		this._dispatcher = { start, update, complete };

		this.start = start.event;

		this.update = update.event;

		this.complete = complete.event;

	}

}

```

## API

### Event

```ts

type Listener = (value: T) => void;

type Unsubscribe = () => void;

interface Event

{

	/**

	 * Adds a listener and return an unsubscribe function.

	 * @param listener

	 */

	(listener: Listener): Unsubscribe;

	/**

	* Add an entry to the end of the registry.

	* @param value

	*/

	add(value: T): number;

	/**

	* Remove an entry.

	* @param id

	*/

	remove(id: number): boolean;

	

	/**

	* Adds an entry to the registry if it doesn't exist.

	* @param value

	*/

	register(value: T): number;

	

	/**

	* Clears all entries.

	*/

	clear(): void;

}

```

### EventPublisher

```ts

interface IEventPublisher

{

	publish(payload: T): void;

	publishReverse(payload: T): void;

	readonly event: Readonly>;

}

```