How to use (socket.io)emit function outside of socket function - nodejs,express
You need to export your io first so that it can be reusable.
socket-setup.js
const socket = require("socket.io")let _io;const setIO = (server) => { _io = socket(server, { cors : { origin : "*", headers : { "Access-Control-Allow-Origin" : "*" } } }) return _io}const getIO = () => { return _io}module.exports = { getIO, setIO}Then in your app entry file (index.js), setup your io.
const app = express()const server = http.createServer(app)let io = setIO(server)io.on("connection", socket => { //Your job})Then wherever, e.g. message.js you want to emit event. You can use io like this.
const onMessageRecieved = () => { try { getIO().emit("hello", "Bye") } catch (error) { console.log(error); }}That's it. Enjoy.