WebSocket.send() fails when bufferutil is not installed

[mihail-8480]

Is there an existing issue for this?

• I've searched for any related issues and avoided creating a duplicate issue.

Description

I am using ws as a WebSocket client in a Next.js application in production mode inside of a docker container, and I got this error before installing bufferutil:

web-1  | TypeError: t.mask is not a function
web-1  |     at e.exports.mask (.next/server/chunks/4059.js:2:17385)
web-1  |     at y.frame (.next/server/chunks/4059.js:2:25319)
web-1  |     at y.dispatch (.next/server/chunks/4059.js:2:28129)
web-1  |     at y.send (.next/server/chunks/4059.js:2:27662)
web-1  |     at I.send (.next/server/chunks/4059.js:2:9247)
web-1  |     at I.i (.next/server/chunks/9184.js:58:4416)

This bug doesn't happen when running Next.js in development mode.

ws version

^8.18.2

Node.js Version

v23.11.1

System

  System:
    OS: Linux 6.14 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (16) x64 Intel(R) Core(TM) i7-10700F CPU @ 2.90GHz
    Memory: 24.71 GB / 31.25 GB
    Container: Yes
    Shell: 5.2.15 - /bin/bash

Expected result

ws.send() to not throw

Actual result

ws.send() throws TypeError: t.mask is not a function

Attachments

No response

[lpinca]

This is not a ws issue.

$ npm i ws

added 1 package in 272ms

$ npm ls
gh-2288@ /Users/luigi/Desktop/gh-2288
`-- [email protected]

$ cat index.mjs 
import WebSocket from 'ws';

const ws = new WebSocket('wss://websocket-echo.com/');

ws.on('error', console.error);

ws.on('open', function open() {
  console.log('connected');
  ws.send(Date.now());
});

ws.on('close', function close() {
  console.log('disconnected');
});

ws.on('message', function message(data) {
  console.log(`Round-trip time: ${Date.now() - data} ms`);

  setTimeout(function timeout() {
    ws.send(Date.now());
  }, 500);
});

$ node index.mjs 
connected
Round-trip time: 124 ms
Round-trip time: 129 ms
Round-trip time: 130 ms
Round-trip time: 130 ms
Round-trip time: 128 ms
Round-trip time: 129 ms
Round-trip time: 129 ms
^C

It is probably a bundling issue.