Cacher is the code snippet organizer for pro developers

function subscribeToTimer(cb) {
  socket.on("timer", timestamp => {
    console.log(timestamp);
  });

  socket.emit("subscribeToTimer", 1000);
}
subscribeToTimer();

const io = require("socket.io")();

io.on("connection", client => {
  client.on("subscribeToTimer", interval => {
    console.log("client is subscribing to timer with interval ", interval);
    setInterval(() => {
      client.emit("timer", new Date());
    }, interval);
  });
});

const port = 8000;
io.listen(port);
console.log("listening on port ", port);