Socketly

Socketly is a tiny, lightweight WebSocket library for TypeScript with built-in reconnect functionality and an event-driven API.

Features

• 🔄 Automatic reconnection with configurable retries and exponential backoff
• 🎭 Event-driven API (open, close, message, error, reconnect)
• 🚀 Minimal and powerful
• 💪 TypeScript support
• 🔒 Secure connection handling
• 📊 Message queueing for offline scenarios
• 🔍 Detailed logging options

Installation

npm install socketly

Usage

Basic Usage

import { Socketly } from 'socketly'

const ws = new Socketly('wss://echo.websocket.org')

ws.on('open', () => {
  console.log('Connected to WebSocket')
  ws.send({ type: 'greeting', content: 'Hello, WebSocket!' })
})

ws.on('message', (data) => {
  console.log('Received message:', data)
})

ws.on('close', () => {
  console.log('WebSocket connection closed')
})

ws.on('error', (error) => {
  console.error('WebSocket error:', error)
})

Advanced Usage

import { Socketly } from 'socketly'

const ws = new Socketly('wss://echo.websocket.org', {
  reconnectInterval: 5000,
  maxRetries: 5,
  logger: console.log,
  protocols: ['protocol1', 'protocol2'],
})

ws.on('open', () => {
  console.log('Connected to WebSocket')
  ws.send({ type: 'greeting', content: 'Hello, WebSocket!' })
})

ws.on('message', (data) => {
  console.log('Received message:', data)
})

ws.on('close', () => {
  console.log('WebSocket connection closed')
})

ws.on('error', (error) => {
  console.error('WebSocket error:', error)
})

ws.on('reconnect', ({ attempt, delay }) => {
  console.log(`Reconnecting... Attempt ${attempt}, Delay: ${delay}ms`)
})

// Using the messages generator
;(async () => {
  for await (const message of ws.messages()) {
    console.log('Received message (via generator):', message)
  }
})()

// Check connection state
console.log('Is connected:', ws.isConnected())
console.log('Connection state:', ws.getState())

// Close the connection after 1 minute
setTimeout(() => {
  ws.close().then(() => console.log('WebSocket closed'))
}, 60000)

API

Socketly

Constructor

new Socketly(url: string, options?: WebSocketOptions)

• url: The WebSocket server URL to connect to.
• options: (Optional) Configuration options for the WebSocket connection.

WebSocketOptions

• reconnectInterval: Time (in ms) between reconnection attempts (default: 3000).
• maxRetries: Maximum number of reconnection attempts (default: Infinity).
• logger: Custom logging function (default: console.log).
• signal: AbortSignal to control the connection externally.
• protocols: WebSocket sub-protocols to use.

Methods

• on(event: WebSocketEvent, callback: EventCallback): void: Add an event listener.
• off(event: WebSocketEvent, callback: EventCallback): void: Remove an event listener.
• send(data: any): void: Send data to the WebSocket server.
• close(): Promise<void>: Close the WebSocket connection.
• messages(): AsyncIterable<any>: Get an async iterator for incoming messages.
• getState(): number: Get the current WebSocket connection state.
• isConnected(): boolean: Check if the WebSocket is currently connected.

Events

• 'open': Fired when the connection is established.
• 'close': Fired when the connection is closed.
• 'message': Fired when a message is received.
• 'error': Fired when an error occurs.
• 'reconnect': Fired when attempting to reconnect.
• '*': Fired for all events.