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    2.0.5 • Public • Published

    Symple Client

    The Symple JavaScript client is a client-side implementation of the Symple protocol that runs in the web browser.

    What is Symple?

    Symple is an unrestrictive real time messaging and presence protocol that implements the minimum number of features required to build full fledged messaging applications with security, flexibility, performance and scalability in mind. These features include:

    • Session sharing with any backend (via Redis)
    • User rostering and presence
    • Media streaming (via WebRTC, see demo)
    • Scoped messaging ie. direct, user and group scope
    • Real-time commands and events
    • Real-time forms

    Symple currently has client implementations in JavaScript, Ruby and C++, which make it ideal for a wide range of messaging requirements, such as building real-time games and applications that run in the web browser, desktop, and mobile phone.


    # install the server
    npm install symple
    # install the client
    npm install symple-client


    We've included a fully featured video chat demo using Symple and WebRTC for your hacking pleasure. The source code is located in the symple-webrtc-video-chat-demo repository.

    You can see it live here:


    The first thing to do is fire up the server:

    cd /path/to/symple/server
    node server

    To use Symple in your app just add the following two scripts into your HTML head, replacing the src path with the correct script locations as necessary.

    Note: Socket.IO is the only dependency (1.3.7 at the time of writing).

      <script type="text/javascript" src=""></script>
      <script type="text/javascript" src="symple.min.js"></script>

    The next thing is to instantiate the client. The code below should provide you with a solid starting point, and illustrates the available callback API methods:

    client = new Symple.Client({
      token: 'someauthtoken',        // An optional pre-arranged session token  
      url: 'http://localhost:4500',  // Symple server URL [http/https]  
      peer: {                        // Peer object contains user information  
        name: 'My Name',             // User display name  
        user: 'myusername',          // User ID  
        group: 'somegroup',          // Peer group/room this user's communication is restricted to  
        // Note: The peer object may be extended any custom data, which will  
        // automatically be broadcast to other group peers via presence updates.  
    client.on('announce', function(peer) {
      console.log('announce:', peer)
      // The user has successfully authenticated
    client.on('presence', function(p) {
      console.log('presence:', p)
      // Captures a presence message broadcast by a peer
    client.on('message', function(m) {
      console.log('message:', m)
      // Captures a message broadcast by a peer
    client.on('command', function(c) {
      console.log('command:', c)
      // Captures a command send from a remote peer
    client.on('event', function(e) {  
      console.log('event:', e)    
      // Captures an event broadcast from a remote peer
    client.on('error', function(error, message) {
      console.log('connection error:', error, message)
      // Connection or authentication failed
      if (error == 'connect') {
      	// Authentication failed
      else if (error == 'connect') {
      	// Connection failed
    client.on('disconnect', function() {
      // Disconnected from the server
    client.on('addPeer', function(peer) {
      console.log('add peer:', peer)  
      // A peer connected       
    client.on('removePeer', function(peer) {
      console.log('remove peer:', peer)
      // A peer disconnected  

    Now all that's left is to build your awesome app!

    Symple Projects

    Node.js server:
    JavaScript client:
    JavaScript client player:
    Ruby client:
    C++ client:


    1. Fork it
    2. Create your feature branch (git checkout -b my-new-feature)
    3. Commit your changes (git commit -am 'Add some feature')
    4. Push to the branch (git push origin my-new-feature)
    5. Create new Pull Request


    For more information please check out the Symple homepage:
    For bugs and issues please use the Github issue tracker:


    npm i symple-client

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