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TypeError: Cannot read properties of undefined (reading 'bind') #5361

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@MrRoyce

Description

@MrRoyce

Describe the bug
Socket.io client using sveltekit and firebase fails in production with the error: TypeError: Cannot read properties of undefined (reading 'bind'). It works fine for my development server.

To Reproduce

Socket.IO client version: 4.8.1

Client

import { io } from "socket.io-client";
import { PUBLIC_SOCKET_HOST } from '$env/static/public';

try {
const socket = io(PUBLIC_SOCKET_HOST, {});
} catch(error) {
  console.error('Error connecting to tempSocket',, error)
}

socket.on("connect", () => {
  console.log(`connect ${socket.id}`);
});

socket.on("disconnect", () => {
  console.log("disconnect");
});

Expected behavior
It should connect to the socket without failing

Platform:

  • Firebase
  • SvelteKit

Additional context
Here is the stack trace in the console:
Error connecting to tempSocket: TypeError: Cannot read properties of undefined (reading 'bind')
at j (index.CbhEcBzz.js:13:11191)
at new ae (index.CbhEcBzz.js:13:43136)
at ee (index.CbhEcBzz.js:13:47477)
at socket.CxTSg0fe.js:1:622

This seems to be the statement that fails in production:
function j(r, e) {
e.useNativeTimers ? (r.setTimeoutFn = tt.bind(w),
r.clearTimeoutFn = st.bind(w)) : (r.setTimeoutFn = w.setTimeout.bind(w),
r.clearTimeoutFn = w.clearTimeout.bind(w))
}

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