NPM http and socket.io CORS

[fenixbinario]

NPM says http module "Security Hold Packet" how can I get CORS between client and server from different domains?.

source: https://www.npmjs.com/package/http
doc: https://socket.io/docs/v4/server-options/#cors

import { createServer } from "http"; import { Server } from "socket.io";
const httpServer = createServer();
const io = new Server(httpServer, { cors: { origin: ["https://example.com", "https://dev.example.com"], allowedHeaders: ["my-custom-header"], credentials: true } });