PubNub basic publish

main.js

var pubnub = PUBNUB.init({
  publish_key: 'demo',
  subscribe_key: 'demo'
});

pubnub.subscribe({
  channel: "myChannel",
  callback: function (message) {
    console.log("I got the message: " + message);
  },
  connect: function () {
    pubnub.publish({
      channel: "myChannel",
      message: "Hello World!"
    });
  }
});