add support for native node:fs and node:fs/promises

[vicb]

The modules are behind the enable_nodejs_fs_module and experimental flags.

Changes are available from worker 20250812

---

• Tests
  • Tests included
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s): Document the node:fs impl cloudflare-docs#24082
  • Documentation not necessary because:
• Wrangler V3 Backport
  • Wrangler PR:
  • Not necessary because: unenv relared changes are not backported

[changeset-bot]

🦋 Changeset detected

Latest commit: 1b1d707

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

This PR includes changesets to release 4 packages

Name	Type
@cloudflare/unenv-preset	Minor
@cloudflare/vite-plugin	Patch
wrangler	Patch
@cloudflare/vitest-pool-workers	Patch

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commit: 1b1d707

[danlapid]

@vicb thanks for this!!!
@vicb @jasnell let's wait on merging this until a hybrid module is not required.
We can implement all of that functionality in the runtime and James will.
We want to move away from polyfills, hybrid modules don't get us there.

cloudflare/workerd#4688

[jasnell]

cloudflare/workerd#4688

[jasnell]

I should be able to verify by tomorrow if we have the entire polyfilled api surface accounted for. Once I verify that we should be good. Plan is to lift the experimental flag likely by end of next week at the latest

[vicb]

I have updated the code in the last fixup commit, should be ready to go when tests are green

[vicb]

Thanks for the review @dario-piotrowicz
I have added the TODO for later when a default date is set at https://github.com/cloudflare/workerd/blob/8bc9530513d8274430a54808a6b5d6c79a18ae79/src/workerd/io/compatibility-date.capnp#L914

[dario-piotrowicz]

Thanks for the review @dario-piotrowicz I have added the TODO for later when a default date is set at https://github.com/cloudflare/workerd/blob/8bc9530513d8274430a54808a6b5d6c79a18ae79/src/workerd/io/compatibility-date.capnp#L914

ok, thanks for the extra context 🙂👍

[Matusy43122]

[email protected]