Socket.io

Installation

npm i socket.io socket.io-client

Concepts

• Socket.io On()
• Socket.io Emit()
• Socket.io Broadcast.Emit()
• Socket.io to()

Boilerplate

Client

import { io } from "socket.io-client"
 
const socket = io('http://127.0.0.1:3000')
 
// recieve an event (connect event)
socket.on('connect', () => {
    console.log(`You connected to the server with id ${socket.id}`);
})
 
// send an event
socket.emit('myevent', 10, 'Hi', {a : "a"});

Server

const io = require("socket.io")(3000, {
    cors :{
        origin : ["http://localhost:8080"],
    }
}) // run on port 3000
 
io.on('connection', socket => {
    // established new connection
    console.log(socket.id);
    // listen for event 'myevent'
    socket.on('myevent', (number, string, object) => {
        console.log(number, string, object) 
    })
})