fix(vite-plugin): use ESM exports of ws for vite dev server

[zebp]

Fixes #8222

Uses the ESM export WebSocketServer of ws since Server isn't present in ws's ESM package as described by this comment by a ws maintainer, which was causing the vite plugin to crash when starting the dev server in some ESM environments.

---

• Tests
  • TODO (before merge)
  • Tests included
  • Tests not necessary because:
• Wrangler E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required
  • Not required because:
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because: bug fix to match documented behavior

[changeset-bot]

🦋 Changeset detected

Latest commit: 13d2a40

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudflare/vite-plugin	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-wrangler-8223

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/8223/npm-package-wrangler-8223

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-wrangler-8223 dev path/to/script.js

Additional artifacts:

cloudflare-workers-bindings-extension:

wget https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-workers-bindings-extension-8223 -O ./cloudflare-workers-bindings-extension.0.0.0-vaeb07bc9d.vsix && code --install-extension ./cloudflare-workers-bindings-extension.0.0.0-vaeb07bc9d.vsix

create-cloudflare:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-create-cloudflare-8223 --no-auto-update

@cloudflare/kv-asset-handler:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-kv-asset-handler-8223

miniflare:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-miniflare-8223

@cloudflare/pages-shared:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-pages-shared-8223

@cloudflare/unenv-preset:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-unenv-preset-8223

@cloudflare/vite-plugin:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-vite-plugin-8223

@cloudflare/vitest-pool-workers:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-vitest-pool-workers-8223

@cloudflare/workers-editor-shared:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-workers-editor-shared-8223

@cloudflare/workers-shared:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-workers-shared-8223

@cloudflare/workflows-shared:

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/13474402320/npm-package-cloudflare-workflows-shared-8223

Note that these links will no longer work once the GitHub Actions artifact expires.

---

wrangler@3.109.2 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20250214.0
workerd	1.20250214.0	1.20250214.0
workerd --version	1.20250214.0	2025-02-14

Please ensure constraints are pinned, and miniflare/workerd minor versions match.

[thomasgauvin]

Thanks @zebp, seems to work!

[zebp]

I'm not sure what to do for testing here, the existing tests should have caught this and I'm not sure why they haven't. If I use the install the dependencies of playground/worker with anything other than pnpm the dev-server fails to start. I suspect pnpm's workspace is changing something about the module resolution but I have no idea on how to isolate this in-repo.

[petebacondarwin]

Thanks for putting up this PR @zebp - I already had a fix in flight, which I just pushed (#8231) and also re-enables the skipped e2e test. So I am going to close this one in favour of that.