Event:'ping' not firing on Manager on 4.1.2

[tonymccallie]

We are needing to programmatically catch the 'ping' event. The documentation indicates this is possible here:
https://socket.io/docs/v4/client-api/#Event-%E2%80%98ping%E2%80%99
But we are unable to do this. All other Manager events are working fine.

Socket.IO client version: 4.1.2

Client

    this.socket.io.on('{error|reconnect|etc}', (error) => {
      //all work great
    });

    this.socket.io.on('ping', () => {
      console.warn('ping');
      //never fires on 4.1.2
    });

I couldn't find any know issues with this. Is it a known bug?

[darrachequesne]

I could indeed reproduce the issue, we'll publish a fix as soon as possible.

[tonymccallie]

Thanks!

[darrachequesne]

This should be fixed by socketio/engine.io-client@589d3ad, included in engine.io-client@5.1.2 / socket.io-client@4.1.3.

Replit: https://replit.com/@socketio/socketio-minimal-example-ping-issue

Thanks!