How to catch ERR_CONNECTION_REFUSED thrown by browser if server goes down?
This should work:
var socket = io('http://localhost');
socket.on('connect_error', function(err) {
// notify user
});
The correct way to handle this, as of Socket 1.x, is to use the Manager object for a given socket. It throws a connect_error
event that can be handled as shown:
socket.io.on('connect_error', function(err) {
// handle server error here
console.log('Error connecting to server');
});