javascript - Socket.io: io is not defined

Question

So, I am trying to get data on my node.js file instead of directly getting it on my JS file.

I a using Socket.io 2 here, Below is a snapshot of my code and this is also the first time I am using Websocket with Node.

I am doing something like

var socket = require('socket.io')

//Home Page
app.get("/", function(req, res) {
var cryto = io.connect("https://xyfz.com/);
cryto.on('trades', function (tradeMsg) {
            console.log(tradeMsg);
          });
res.render("index");
});

I also tried something like

var io = socket("https://abc.io/"); 

and

var socket = require('socket.io')
    var io = socket();

which was throwing errors like server.listeners is not a function and io.connect is not a function.

I am certain that I messing up stuff here so can someone guide me about the correct way of doing it?

Answer 1

Two things which are wrong .

First Consider using Socket.io-client instead of Socket.io.

Second and very much important.

Never ever make API calls inside your routes. This will trigger a API call everytime user opens your website or webpage

You can also expect an error "Unexpected headers" or something like that.

Always, Try do declare it outside any routes in your NodeAPP.

Same goes for socket.io as well