get active() {
    return !!this.subs;
  }
Whether the Socket will try to reconnect when its Manager connects or reconnects.

@example
const socket = io();

console.log(socket.active); // true

socket.on("disconnect", (reason) => {
  if (reason === "io server disconnect") {
    // the disconnection was initiated by the server, you need to manually reconnect
    console.log(socket.active); // false
  }
  // else the socket will automatically try to reconnect
  console.log(socket.active); // true
});