Question 137124 in Javascript Question posted in
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Javascript – Socket.io connection status acknowledge

I am using socket.io to build a single player/multiplayer application.
Client side:

let socket = io(host,{autoConnect: false,forceNew: true});

Whenever the user press on the multiplayer option, I start connection to the server as

socket.connect();

if(socket.connected) console.log("Success")
else{
   showToast(0,"Connection Issue","Failed to connect to server")
   socket.disconnect(); 
}

The problem is socket.connected doesn’t wait for the response of socket.connect() and always evaluate as false.
How to wait for the response of socket.io connection request?

I tried below events but none was fired.

  1. socket.on("connect",()=>alert("Connected"));
  2. socket.on("disconnect",()=>alert("Disconnected"));
  3. socket.on("connect_error",()=>alert("Connection Error"));
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    Thanks to @kennarddh

    socket.connect();
socket.on("connect",()=>alert("Connected"));
socket.on("disconnect",()=>alert("Disconnected"));
socket.on("connect_error",()=>alert("Connection Error"));

    Appreantly using socket.connected doesn't wait for the reponse. registering event using socket.on to be called on the status of the request worked!


  2. 0 
    // Client Side

const socket = io()

socket.on('connection-success', success => {
      alert('Connection');
    })


 /* Server Side */
const express = require("express");
const app = express();
const io = require("socket.io")(options); // option is  HTTP server

const port = 8080;
app.get("/",(req,res)=>{
  res.send("hello world")
 });
const server= app.listen(port, ()=>{
     console.log(`Port number ${port}`);
});
 io.listen(server);


io.on("connection", socket=>{


socket.emit('connection-success',{
    status: 'connection-success',
    
})
socket.on("disconnect", ()=>{
    alert(`Disconnected`);
})
socket.on("connection_error", ()=>{
    alert(`Connection Error`);
})

})
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