Publish & Subscribe Real-time Messaging with PubNub

Usage no npm install needed!

<script type="module">
  import pubnub from '';


PubNub JavaScript SDK (V4)

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This is the official PubNub JavaScript SDK repository.

PubNub takes care of the infrastructure and APIs needed for the realtime communication layer of your application. Work on your app's logic and let PubNub handle sending and receiving data across the world in less than 100ms.

Get keys

You will need the publish and subscribe keys to authenticate your app. Get your keys from the Admin Portal.

Configure PubNub

  1. Integrate the JavaScript SDK into your project:

  2. Configure your keys:

pubnub = new PubNub({
  publishKey : "myPublishKey",
  subscribeKey : "mySubscribeKey",
  uuid: "myUniqueUUID"

Add event listeners

  message: function (m) {
    // handle messages
  presence: function (p) {
    // handle presence  
  signal: function (s) {
    // handle signals
  objects: (objectEvent) => {
    // handle objects
  messageAction: function (ma) {
    // handle message actions
  file: function (event) {
    // handle files  
  status: function (s) {
  // handle status  


var publishPayload = {
    channel : "hello_world",
    message: {
        title: "greeting",
        description: "This is my first message!"

pubnub.publish(publishPayload, function(status, response) {
    console.log(status, response);

    channels: ["hello_world"]



If you need help or have a general question, contact