Answers for "Access to XMLHttpRequest at 'http://localhost:8000/socket.io/?EIO=4&transport=polling&t=NTuUZ9i' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource."

socket io with cors

const io = require("socket.io")(httpServer, 
  { 
  cors: {    
    origin: "*",    
    methods: ["GET", "POST"]  
  }});

Posted by: Guest on December-25-2020

Code answers related to "Access to XMLHttpRequest at 'http://localhost:8000/socket.io/?EIO=4&transport=polling&t=NTuUZ9i' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource."