Pusher presence channel subscription

Pusher_presence_channel_subscription.js

pusher = new Pusher(process.env.PUSHER_APP_KEY, {
      cluster: YOUR_PUSHER_APP_CLUSTER,
      authEndpoint: YOUR_BASE_URL + '/broadcasting/auth',
      auth: {
        headers: {
          Accept: 'application/json',
          Authorization: YOUR_TOKEN
        }
      }

    })

    // debug error
    pusher.connection.bind('error', function (err) {
      console.debug('connection error: ', err)
    })

    // check connection state
    pusher.connection.bind('state_change', function () {
      console.debug('pusher connection state: ', pusher.connection.state)
    })

    // subscribe
    const subscribeChannel = pusher.subscribe(YOUR_CHANNEL_NAME)

    // subscription error event
    subscribeChannel.bind('pusher:subscription_error', function (status) {
      console.debug('subscription_error: ', status)
    })

    // subscription success event
    subscribeChannel.bind('pusher:subscription_succeeded', function () {
      console.debug('subscription_succeeded: ', subscribeChannel)
    })