How to use socket.io only to receive data?

Question

Angular

I'm using Angular 8 and Node.js and I need to get the data displayed on the client in real time. But at the same time, I will not send any data from the client to the server, i.e. i am using get request.

At the moment, to achieve this, I did this:

interval;

ngOnInit() {
    this.interval = setInterval(() => {
      this.load();
    }, 1000);
} 
ngOnDestroy() {
    clearInterval(this.interval);
    if (this.ngUnsubscribe !== undefined) {
      this.ngUnsubscribe.unsubscribe();
    }
}

How can this be done with socket.io? Tried to follow this example but didn't work.