If you're using socket.io v3.0+ you need to add this to index.js in the server (replace old code with this):
const io = require('socket.io')(http, { cors: { origin: "localhost:3000", methods: ["GET", "POST"] } });
socket.io/docs/v3/migrating-from-2...
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If you're using socket.io v3.0+ you need to add this to index.js in the server (replace old code with this):
const io = require('socket.io')(http, {
cors: {
origin: "localhost:3000",
methods: ["GET", "POST"]
}
});
socket.io/docs/v3/migrating-from-2...