Simple, EventEmitter API for WebSockets (browser)


  • super simple API for working with WebSockets in the browser
  • Uses EventEmitter interface
  • supports text and binary data

This module works in the browser with browserify, and it's used by WebTorrent!

npm install simple-websocket
var SimpleWebsocket = require('simple-websocket')
var socket = new SimpleWebsocket('ws://')
socket.on('connect', function () {
  // socket is connected! 
socket.on('data', function (data) {
  console.log('got message: ' + data)

Note: If you're NOT using browserify, then use the standalone simplewebsocket.bundle.js file included in this repo. This exports a SimpleWebsocket function on the window.

Create a new WebSocket connection.

If opts is specified, then the default options (shown below) will be overridden.

  reconnect: 5000

The options do the following:

  • reconnect - If websocket encounters an error, reconnect after this timeout (in milliseconds). Set to false to disable automatic reconnect on error.

Send text/binary data to the WebSocket server. data can be any of several types: String, Buffer (see buffer), TypedArrayView (Uint8Array, etc.), ArrayBuffer, or Blob (in browsers that support it).

Other data types will be transformed with JSON.stringify before sending. This is handy for sending object literals across like this: socket.send({ type: 'data', data: 'hi' }).

Note: If this method is called before the socket.on('connect') event has fired, then data will be buffered.

Destroy and cleanup this websocket connection.

If the optional onclose paramter is passed, then it will be registered as a listener on the 'close' event.

Fired when the websocket connection is ready to use.

Received a message from the websocket server.

data will be either a String or a Buffer/Uint8Array (see buffer).

Called when the websocket connection has closed.

err is an Error object.

Fired when a fatal error occurs. If the reconnect option is set to something truthy (defaults to 5000), then this event will never get emitted because the socket will automatically reconnect on error.

err is an Error object.

Fired when an error occurs but an auto-reconnect will be attempted. Thus, it's only a warning, not a full-fledged error.

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MIT. Copyright (c) Feross Aboukhadijeh.