Pusher - Avoiding instant disconnects while navigating/refreshing page

pusher_delaying_disconnects.js

function removeMember(member) {
    pendingRemoves[ member.id ] = setTimeout(function() {
      removeMemberFromUI(member);
    }, 3000); // wait 3 seconds
};

function addMember(member) {
  var pendingRemoveTimeout = pendingRemoves[member.id];
  if(pendingRemoveTimeout) {
    // user left, but has rejoined
    clearTimeout(pendingRemoveTimeout);
  }else{
    // Do normal user add action
}

// Source: https://support.pusher.com/hc/en-us/articles/202054403-How-can-I-stop-users-going-offline-for-an-instant-when-they-navigate-between-pages-