Can't construct WebSocket about isomorphic-ws

[julien-f]

How do you bundle your code?

[kirillt]

@julien-f with Babel and WebPack
Here is my package.json:

{
  "private": true,
  "scripts": {
    "build": "babel src -d lib; webpack",
    "start": "budo dist/index.js:index.js --ssl --cert ...  --key ..."
  },
  "dependencies": {
    "isomorphic-ws": "^4.0.1",
    "ws": "^7.2.5"
  },
  "devDependencies": {
    "@babel/cli": "^7.8.4",
    "@babel/core": "^7.9.6",
    "@babel/preset-env": "^7.9.6",
    "budo": "^11.6.3",
    "webpack": "^4.43.0",
    "webpack-cli": "^3.3.11"
  },
  "browserslist": "> 0.25%, not dead"
}

[julien-f]

I suspect that your code is using the Node implementation provided by node.js instead of the browser implementation provided by browser.js.

Make sure that your bundler supports the browser entry in package.json:

isomorphic-ws/package.json

Line 6 in 0a0d169

"browser": "browser.js",

[kirillt]

Thank you @julien-f but this doesn't work for me. I tried to call src/index.js directly bypassing bundlers, but the result is the same. Is there a minimal example working in browser which uses this library? I agree, the issue is quite weird since I don't see any dependencies to satisfy except ws.

[julien-f]

In browser, the module should use the code in browser.js, you can try by directly requiring/importing 'isomorphic-ws/browser.js'.

This module is automatically selected if the bundler supports the browser entry in package.json.