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Jet Realtime Message Bus for the Web. Daemon and Peer implementation.





Join the chat at npm version Build Status Code Climate Coverage Status js-standard-style deps

This is Jet for JavaScript. Jet is the hybrid of an In-Memory Database and a Realtime Push-Framework. Node and Browsers are supported (using Browserify).


Start a Daemon:

$ jetd.js

Provide Content:

var jet = require('node-jet');

// connect to daemon
var peer = new jet.Peer({
  url: 'ws://localhost:11123' 

// provide methods/factories/services/actions/etc
var greet = new jet.Method('greet');
greet.on('call', function(who) {
  console.log('Hello', who);


// provide documents/realtime-status/configuration/etc
var jim = new jet.State('persons/#123', getPerson('#123'));
jim.on('set', function(changedPerson) {
  setPerson('#123', changedPerson);
  // changes are propageted automatically


// provide read-only stuff
var nowState = new jet.State('time/now', new Date().getTime());


// change async
setInterval(function() {
  nowState.value(new Date().getTime());
}, 100);

Consume Content:

// fetch/query content
var youngestPersons = new jet.Fetcher()
  .path('startsWith', 'persons/')
  .sortByKey('age', 'number')
  .range(1, 20)
  .on('data', function(persons) {


// call methods'greet', ['Steve']).then(function(response) {

// set states
peer.set('person/#123', {name: 'Jose', age: 33});


Read the Todo-App Tutorial (Vanilla JS client) or the React + Redux Variant for building this simple collaborative realtime app:

Jet Todo-App



$ npm install node-jet

Stand-Alone Daemon

The package provides a stand-alone Jet Daemon which listens on ports 11122 (trivial protocol) and 11123 (WebSockets) per default.

Start it like this (globally):

 $ jetd.js

Or - if installed locally:

 $ node_modules/.bin/jetd.js

Integrated Daemon

If you want the Jet Daemon to listen for WebSockets on the same port as your existing (node.js) HTTP server, use the daemon.listen({server:httpServer}) method like this:

var httpServer = http.createServer(function(req, res) {
  // serve your stuff

var daemon = new jet.Daemon();
  server: httpServer


Open Radar on, which allows you to see/observe Your Jet States and Methods. Your local Jet Daemon's default WebSocket address is ws://localhost:11123.


For further info and documentation refer to the Jet Homepage.


There is also the canonical ToDo-App available: