I recently encountered this code structure () => {} in the following code snippet
import { Server } from "socket.io";
const io = new Server(3000);
io.on("connection", (socket) => {
// send a message to the client
socket.emit("hello from server", 1, "2", { 3: Buffer.from([4]) });
// receive a message from the client
socket.on("hello from client", (...args) => {
// ...
});
});
But I don't understand what is this code structure? Have you any reference I could use to learn about it?
That's an arrow function used in javascript. You can get additional information here. Basically its equivalent with traditional functions would be:
import { Server } from "socket.io";
const io = new Server(3000);
io.on("connection", function (socket){
// send a message to the client
socket.emit("hello from server", 1, "2", { 3: Buffer.from([4]) });
// receive a message from the client
socket.on("hello from client", function (...args){
// ...
});
});