module: unflag --experimental-require-module #55085

joyeecheung · 2024-09-23T17:35:58Z

This unflags --experimental-require-module so require(esm) can be used without the flag. For now, when require() actually encounters an ESM for the first time in a process, it will still emit an experimental warning. To opt out of the feature, --no-experimental-require-module can be used.

There are some tests specifically testing ERR_REQUIRE_ESM. Some of them are repurposed to test --no-experimental-require-module. Some of them are modified to just expect loading require(esm) to work, when it's appropriate.

This is expected to go out in 23 and get some testing before being backported to older LTS.

See #55085 (comment) for a summary of the impact of this on loading the high-impact npm packages.

For more background on the motivation of require(esm) see #51977 - TL;DR: it helps accelerating ESM adoption in the ecosystem as package authors can start shipping native ESM with less breakage to their CJS users; it also helps frameworks and tools that take plugins to support native ESM in user/plugin code whilst they are still navigating their own migration to ESM.

Note to releasers: in the release announcements we should emphasize the implications this has on top-level await is limited to require(). In entry points or modules that are only ever imported, top-level await works fine as before. Only when one tries to use the synchronous require() to evaluate a module that awaits at module loading time (top-level), it obviously would not work, not that it ever worked before require() supports ESM, just that it's now the only significant remaining exception for require(esm).

Refs: #52697

nodejs-github-bot · 2024-09-23T17:36:03Z

Review requested:

@nodejs/loaders

lib/internal/modules/esm/loader.js

test/es-module/test-cjs-esm-warn.js

test/es-module/test-esm-type-field-errors-2.js

test/es-module/test-require-module-preload.js

test/parallel/test-require-mjs.js

nodejs-github-bot · 2024-09-24T09:28:11Z

CI: https://ci.nodejs.org/job/node-test-pull-request/62722/

joyeecheung · 2024-09-24T11:40:52Z

Did some testing with https://github.com/joyeecheung/test-require-esm using the high-impact npm packages labeled as esm/dual/faux by https://github.com/wooorm/npm-esm-vs-cjs (I took the top 5000 as the sample), output is in https://gist.github.com/joyeecheung/f691e98e0994186f14417237ccb51f53 (note: I excluded a few packages that are not meant to be loaded in Node.js/not meant to be loaded as a module/cannot be installed properly due to conflicts with other packages out of the 5000 sample, see https://github.com/joyeecheung/test-require-esm/blob/a29118dbd1f868eddc64514c93a4b02c6c157013/try2.cjs#L7)

Summary:

Impact on dual packages

Before unflagging, on v22.9.0, 363 out of 379 dual packages could be require'd. After unflagging with this PR, 373 could be require'd - the +10 comes from fixing ERR_REQUIRE_ESM, I think they were just esm-only packages being mislabeled by npm-esm-vs-cjs as dual. Anyway, unflagging doesn't regress the loading the dual packages in this sample AFAICT.

Impact on esm-only packages

Before unflagging, on v22.9.0, 103 out of 662 esm packages could be require'd (again I think these were probably dual packages mislabeled as esm-only by npm-esm-vs-cjs). After unflagging, 639 out of 662 esm packages can be required. As far as I can tell the 23 that still cannot be loaded are expected:

17 of they are defining only an import exports condition, forbidding require() to load them. If they want to open up to require(), they can simply change import to default so it can be loaded by both require() and import.
6 of them are using top-level await. A few of them are only using it to dynamically load Node.js builtins, this can be fixed by switching to use globalThis.process.getBuiltinModule() that we introduced to eliminate the need of TLA for this.

The conclusion is, most (>95%) high-impact esm-only npm packages can now be loaded with require(esm) after the unflagging. Most of the packages that still can't be required can be fixed with small changes.

Impact on faux-esm packages

On both v22 and in this PR, 526 faux packages out of the 5000 high impact npm packages can be loaded. Only blob fails to load on both v22 (without the flag) and in this PR. blob could be loaded in v20, and this seems to be a regression already introduced in v22 caused by some interop issues with the esm package.

The conclusion is that this does not incur additional regression compared to v22, but there is likely a regression if backported as-is to v20. I don't think this prevents us from unflagging require(esm) in v23 given that it already exists in v22 without using the flag anyway, but we should at least look into the regression before we consider backporting this to v20.

Impact on cjs packages

Given that the majority of the high-impact npm packages are CommonJS so the number of them is the biggest, I didn't have the time to test them all yet, but some preliminary testing and the tests covered by the core test suites at least shows that they are unlikely to be affected by this change.

joyeecheung · 2024-09-24T11:50:05Z

I think this is ready for review - at least, for being landed in v23, PTAL @nodejs/tsc @nodejs/loaders

mcollina

lgtm

github-actions · 2024-09-24T12:04:54Z

The notable-change PRs with changes that should be highlighted in changelogs. label has been added by @mcollina.

Please suggest a text for the release notes if you'd like to include a more detailed summary, then proceed to update the PR description with the text or a link to the notable change suggested text comment. Otherwise, the commit will be placed in the Other Notable Changes section.

codecov · 2024-09-24T13:29:46Z

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.23%. Comparing base (5c22d19) to head (eaa5d48).
Report is 947 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #55085      +/-   ##
==========================================
- Coverage   88.25%   88.23%   -0.02%     
==========================================
  Files         651      651              
  Lines      183856   183845      -11     
  Branches    35850    35841       -9     
==========================================
- Hits       162259   162222      -37     
- Misses      14888    14907      +19     
- Partials     6709     6716       +7

Files with missing lines	Coverage Δ
lib/internal/modules/cjs/loader.js	`97.26% <100.00%> (-0.11%)`	⬇️
lib/internal/modules/esm/load.js	`92.24% <ø> (-0.31%)`	⬇️
lib/internal/modules/esm/loader.js	`98.01% <100.00%> (-0.34%)`	⬇️
lib/internal/modules/esm/module_job.js	`100.00% <100.00%> (ø)`
lib/internal/modules/esm/utils.js	`98.88% <100.00%> (-0.01%)`	⬇️
src/node_options.cc	`88.04% <ø> (ø)`
src/node_options.h	`98.21% <100.00%> (ø)`

... and 38 files with indirect coverage changes

DavidAnson · 2024-12-20T04:30:39Z

FYI, it seems like webpack was affected by this change as well: webpack/webpack-cli#4340

voxpelli · 2024-12-20T11:10:16Z

FYI, it seems like webpack was affected by this change as well: webpack/webpack-cli#4340

Different kind of issue, but it does look fairly common to do a fallback based on whether the thrown exception is ERR_REQUIRE_ESM: https://github.com/search?q=ERR_REQUIRE_ESM+language%3AJavaScript&type=code&l=JavaScript

And the one case that still would need that fallback, the top level awaits, will not get that fallback as the thrown exception is now ERR_REQUIRE_ASYNC_MODULE instead.

That said: It’s possible for these modules to always use await import() if they separately resolve the path using the require algorithm first.

This unflags --experimental-require-module so require(esm) can be used without the flag. For now, when require() actually encounters an ESM, it will still emit an experimental warning. To opt out of the feature, --no-experimental-require-module can be used. There are some tests specifically testing ERR_REQUIRE_ESM. Some of them are repurposed to test --no-experimental-require-module. Some of them are modified to just expect loading require(esm) to work, when it's appropriate. PR-URL: nodejs#55085 Refs: nodejs#52697 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Filip Skokan <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: Richard Lau <[email protected]>

joyeecheung · 2025-02-06T00:56:28Z

Backport in #56927

This unflags --experimental-require-module so require(esm) can be used without the flag. For now, when require() actually encounters an ESM, it will still emit an experimental warning. To opt out of the feature, --no-experimental-require-module can be used. There are some tests specifically testing ERR_REQUIRE_ESM. Some of them are repurposed to test --no-experimental-require-module. Some of them are modified to just expect loading require(esm) to work, when it's appropriate. PR-URL: nodejs#55085 Refs: nodejs#52697 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Filip Skokan <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: Richard Lau <[email protected]>

This unflags --experimental-require-module so require(esm) can be used without the flag. For now, when require() actually encounters an ESM, it will still emit an experimental warning. To opt out of the feature, --no-experimental-require-module can be used. There are some tests specifically testing ERR_REQUIRE_ESM. Some of them are repurposed to test --no-experimental-require-module. Some of them are modified to just expect loading require(esm) to work, when it's appropriate. PR-URL: #55085 Backport-PR-URL: #56927 Refs: #52697 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Marco Ippolito <[email protected]> Reviewed-By: Rafael Gonzaga <[email protected]> Reviewed-By: Yagiz Nizipli <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Filip Skokan <[email protected]> Reviewed-By: Michael Dawson <[email protected]> Reviewed-By: Richard Lau <[email protected]>

Notable changes: crypto: * update root certificates to NSS 3.107 (Node.js GitHub Bot) #56566 module: * (SEMVER-MINOR) only emit require(esm) warning under --trace-require-module (Joyee Cheung) #56194 * (SEMVER-MINOR) unflag --experimental-require-module (Joyee Cheung) #55085 * (SEMVER-MINOR) implement the "module-sync" exports condition (Joyee Cheung) #54648 * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 * (SEMVER-MINOR) add __esModule to require()'d ESM (Joyee Cheung) #52166 process: * (SEMVER-MINOR) add process.features.require_module (Joyee Cheung) #55241 worker: * (SEMVER-MINOR) add postMessageToThread (Paolo Insogna) #53682 PR-URL: TODO

Notable changes: crypto: * update root certificates to NSS 3.107 (Node.js GitHub Bot) #56566 module: * (SEMVER-MINOR) only emit require(esm) warning under --trace-require-module (Joyee Cheung) #56194 * (SEMVER-MINOR) unflag --experimental-require-module (Joyee Cheung) #55085 * (SEMVER-MINOR) implement the "module-sync" exports condition (Joyee Cheung) #54648 * (SEMVER-MINOR) unflag detect-module (Geoffrey Booth) #53619 * (SEMVER-MINOR) add __esModule to require()'d ESM (Joyee Cheung) #52166 process: * (SEMVER-MINOR) add process.features.require_module (Joyee Cheung) #55241 worker: * (SEMVER-MINOR) add postMessageToThread (Paolo Insogna) #53682 PR-URL: #57349

This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [node](https://github.com/nodejs/node) | stage | minor | `20.18.3-bullseye` -> `20.19.0-bullseye` | --- ### Release Notes <details> <summary>nodejs/node (node)</summary> ### [`v20.19.0`](https://github.com/nodejs/node/releases/tag/v20.19.0): 2025-03-13, Version 20.19.0 'Iron' (LTS), @marco-ippolito [Compare Source](nodejs/node@v20.18.3...v20.19.0) ##### Notable Changes ##### require(esm) is now enabled by default Support for loading native ES modules using require() had been available on v20.x under the command line flag --experimental-require-module, and available by default on v22.x and v23.x. In this release, it is now no longer behind a flag on v20.x. This feature has been tested on v23.x and v22.x, and we are looking for user feedback from v20.x to make more final tweaks before fully stabilizing it. It now no longer emits a warning unless `--trace-require-module` is explicitly used. If there happens to be any regressions caused by this feature, users can report it to the Node.js issue tracker. Meanwhile this feature can also be disabled using `--no-experimental-require-module` as a workaround. With this feature enabled, Node.js will no longer throw `ERR_REQUIRE_ESM` if `require()` is used to load a ES module. It can, however, throw `ERR_REQUIRE_ASYNC_MODULE` if the ES module being loaded or its dependencies contain top-level `await`. When the ES module is loaded successfully by `require()`, the returned object will either be a ES module namespace object similar to what's returned by `import()`, or what gets exported as `"module.exports"` in the ES module. Users can check `process.features.require_module` to see whether `require(esm)` is enabled in the current Node.js instance. For packages, the `"module-sync"` exports condition can be used as a way to detect `require(esm)` support in the current Node.js instance and allow both `require()` and `import` to load the same native ES module. See [the documentation](https://nodejs.org/docs/latest/api/modules.html#loading-ecmascript-modules-using-require) for more details about this feature. Contributed by Joyee Cheung in [#55085](nodejs/node#55085) ##### Module syntax detection is now enabled by default Module syntax detection (the `--experimental-detect-module` flag) is now enabled by default. Use `--no-experimental-detect-module` to disable it if needed. Syntax detection attempts to run ambiguous files as CommonJS, and if the module fails to parse as CommonJS due to ES module syntax, Node.js tries again and runs the file as an ES module. Ambiguous files are those with a `.js` or no extension, where the nearest parent `package.json` has no `"type"` field (either `"type": "module"` or `"type": "commonjs"`). Syntax detection should have no performance impact on CommonJS modules, but it incurs a slight performance penalty for ES modules; add `"type": "module"` to the nearest parent `package.json` file to eliminate the performance cost. A use case unlocked by this feature is the ability to use ES module syntax in extensionless scripts with no nearby `package.json`. Thanks to Geoffrey Booth for making this work on [#53619](nodejs/node#53619). ##### Other Notable Changes - \[[`285bb4ee14`](nodejs/node@285bb4ee14)] - **crypto**: update root certificates to NSS 3.107 (Node.js GitHub Bot) [#56566](nodejs/node#56566) - \[[`73b5c16684`](nodejs/node@73b5c16684)] - **(SEMVER-MINOR)** **worker**: add postMessageToThread (Paolo Insogna) [#53682](nodejs/node#53682) - \[[`de313b2336`](nodejs/node@de313b2336)] - **(SEMVER-MINOR)** **module**: only emit require(esm) warning under --trace-require-module (Joyee Cheung) [#56194](nodejs/node#56194) - \[[`4fba01911d`](nodejs/node@4fba01911d)] - **(SEMVER-MINOR)** **process**: add process.features.require_module (Joyee Cheung) [#55241](nodejs/node#55241) - \[[`df8a045afe`](nodejs/node@df8a045afe)] - **(SEMVER-MINOR)** **module**: implement the "module-sync" exports condition (Joyee Cheung) [#54648](nodejs/node#54648) - \[[`f9dc1eaef5`](nodejs/node@f9dc1eaef5)] - **(SEMVER-MINOR)** **module**: add \__esModule to require()'d ESM (Joyee Cheung) [#52166](nodejs/node#52166) <details> <summary> Commits </summary> - \[[`d84be843e3`](nodejs/node@d84be843e3)] - **benchmark**: add validateStream to styleText bench (Rafael Gonzaga) [#56556](nodejs/node#56556) - \[[`d8eaf5b9b8`](nodejs/node@d8eaf5b9b8)] - **build**: fix compatibility with V8's `depot_tools` (Richard Lau) [#57330](nodejs/node#57330) - \[[`1ee4bf9690`](nodejs/node@1ee4bf9690)] - **build**: test macos-13 on GitHub actions (Michaël Zasso) [#56307](nodejs/node#56307) - \[[`1cc8d69882`](nodejs/node@1cc8d69882)] - **build**: build v8 with -fvisibility=hidden on macOS (Joyee Cheung) [#56275](nodejs/node#56275) - \[[`52f1f7e22b`](nodejs/node@52f1f7e22b)] - **child_process**: fix parsing messages with splitted length field (Maksim Gorkov) [#56106](nodejs/node#56106) - \[[`5ef3c3c996`](nodejs/node@5ef3c3c996)] - **crypto**: add missing return value check (Michael Dawson) [#56615](nodejs/node#56615) - \[[`285bb4ee14`](nodejs/node@285bb4ee14)] - **crypto**: update root certificates to NSS 3.107 (Node.js GitHub Bot) [#56566](nodejs/node#56566) - \[[`46ceb9dc1c`](nodejs/node@46ceb9dc1c)] - **deps**: update timezone to 2025a (Node.js GitHub Bot) [#56876](nodejs/node#56876) - \[[`d4ca38fe8e`](nodejs/node@d4ca38fe8e)] - **deps**: macro ENODATA is deprecated in libc++ (Cheng) [#56698](nodejs/node#56698) - \[[`15214e6508`](nodejs/node@15214e6508)] - **deps**: update simdutf to 6.0.3 (Node.js GitHub Bot) [#56567](nodejs/node#56567) - \[[`1e44f5d84b`](nodejs/node@1e44f5d84b)] - **deps**: update simdutf to 5.7.2 (Node.js GitHub Bot) [#56388](nodejs/node#56388) - \[[`b92ff7be38`](nodejs/node@b92ff7be38)] - **deps**: update googletest to [`7d76a23`](nodejs/node@7d76a23) (Node.js GitHub Bot) [#56387](nodejs/node#56387) - \[[`e1b71a81a9`](nodejs/node@e1b71a81a9)] - **deps**: update googletest to [`e54519b`](nodejs/node@e54519b) (Node.js GitHub Bot) [#56370](nodejs/node#56370) - \[[`c0d45e7f38`](nodejs/node@c0d45e7f38)] - **deps**: update simdutf to 5.7.0 (Node.js GitHub Bot) [#56332](nodejs/node#56332) - \[[`d69107f5a8`](nodejs/node@d69107f5a8)] - **deps**: update icu to 76.1 (Node.js GitHub Bot) [#55551](nodejs/node#55551) - \[[`5c9a397699`](nodejs/node@5c9a397699)] - **deps**: V8: backport [`9ab4059`](nodejs/node@9ab40592f697) (Lu Yahan) [#56781](nodejs/node#56781) - \[[`8342233f6d`](nodejs/node@8342233f6d)] - **deps**: update corepack to 0.31.0 (Node.js GitHub Bot) [#56795](nodejs/node#56795) - \[[`561493d35e`](nodejs/node@561493d35e)] - **deps,src**: simplify base64 encoding (Daniel Lemire) [#52714](nodejs/node#52714) - \[[`6207b2936c`](nodejs/node@6207b2936c)] - **doc**: move anatoli to emeritus (Michael Dawson) [#56592](nodejs/node#56592) - \[[`b0ab483400`](nodejs/node@b0ab483400)] - **doc**: fix styles of the expandable TOC (Antoine du Hamel) [#56755](nodejs/node#56755) - \[[`53e4dc2a82`](nodejs/node@53e4dc2a82)] - **doc**: add "Skip to content" button (Antoine du Hamel) [#56750](nodejs/node#56750) - \[[`33ee4645c3`](nodejs/node@33ee4645c3)] - **doc**: improve accessibility of expandable lists (Antoine du Hamel) [#56749](nodejs/node#56749) - \[[`b514438418`](nodejs/node@b514438418)] - **doc**: add note regarding commit message trailers (Dario Piotrowicz) [#56736](nodejs/node#56736) - \[[`627f2997e3`](nodejs/node@627f2997e3)] - **doc**: fix typo in example code for util.styleText (Robin Mehner) [#56720](nodejs/node#56720) - \[[`68548dcb48`](nodejs/node@68548dcb48)] - **doc**: fix inconsistencies in `WeakSet` and `WeakMap` comparison details (Shreyans Pathak) [#56683](nodejs/node#56683) - \[[`337cfb2549`](nodejs/node@337cfb2549)] - **doc**: add RafaelGSS as latest sec release stewards (Rafael Gonzaga) [#56682](nodejs/node#56682) - \[[`e890c86d7b`](nodejs/node@e890c86d7b)] - **doc**: clarify cjs/esm diff in `queueMicrotask()` vs `process.nextTick()` (Dario Piotrowicz) [#56659](nodejs/node#56659) - \[[`978263923f`](nodejs/node@978263923f)] - **doc**: `WeakSet` and `WeakMap` comparison details (Shreyans Pathak) [#56648](nodejs/node#56648) - \[[`aba280ccd8`](nodejs/node@aba280ccd8)] - **doc**: mention prepare --security (Rafael Gonzaga) [#56617](nodejs/node#56617) - \[[`0a009a527b`](nodejs/node@0a009a527b)] - **doc**: tweak info on reposts in ambassador program (Michael Dawson) [#56589](nodejs/node#56589) - \[[`d2f09e2ab3`](nodejs/node@d2f09e2ab3)] - **doc**: add type stripping to ambassadors program (Marco Ippolito) [#56598](nodejs/node#56598) - \[[`b0b77d7fbe`](nodejs/node@b0b77d7fbe)] - **doc**: improve internal documentation on built-in snapshot (Joyee Cheung) [#56505](nodejs/node#56505) - \[[`4b3e7fee94`](nodejs/node@4b3e7fee94)] - **doc**: document CLI way to open the nodejs/bluesky PR (Antoine du Hamel) [#56506](nodejs/node#56506) - \[[`03878b0384`](nodejs/node@03878b0384)] - **doc**: update gcc-version for ubuntu-lts (Kunal Kumar) [#56553](nodejs/node#56553) - \[[`acbbd7c1a6`](nodejs/node@acbbd7c1a6)] - **doc**: fix parentheses in options (Tobias Nießen) [#56563](nodejs/node#56563) - \[[`3fe80c30b8`](nodejs/node@3fe80c30b8)] - **doc**: include CVE to EOL lines as sec release process (Rafael Gonzaga) [#56520](nodejs/node#56520) - \[[`ff8af58046`](nodejs/node@ff8af58046)] - **doc**: add esm examples to node:trace_events (Alfredo González) [#56514](nodejs/node#56514) - \[[`27b9cfd135`](nodejs/node@27b9cfd135)] - **doc**: add message for Ambassadors to promote (Michael Dawson) [#56235](nodejs/node#56235) - \[[`020c939da1`](nodejs/node@020c939da1)] - **doc**: allow request for TSC reviews via the GitHub UI (Antoine du Hamel) [#56493](nodejs/node#56493) - \[[`1ef9c9a354`](nodejs/node@1ef9c9a354)] - **doc**: add example for piping ReadableStream (Gabriel Schulhof) [#56415](nodejs/node#56415) - \[[`e675c3a7fc`](nodejs/node@e675c3a7fc)] - **doc**: expand description of `parseArg`'s `default` (Kevin Gibbons) [#54431](nodejs/node#54431) - \[[`bc756da876`](nodejs/node@bc756da876)] - **doc**: use `<ul>` instead of `<ol>` in `SECURITY.md` (Antoine du Hamel) [#56346](nodejs/node#56346) - \[[`ad59c82a49`](nodejs/node@ad59c82a49)] - **doc**: clarify that WASM is trusted (Matteo Collina) [#56345](nodejs/node#56345) - \[[`8e76cc69e5`](nodejs/node@8e76cc69e5)] - **doc**: move dual package shipping docs to separate repo (Joyee Cheung) [#55444](nodejs/node#55444) - \[[`9fda8e29cd`](nodejs/node@9fda8e29cd)] - **doc**: mark `--env-file-if-exists` flag as experimental (Juan José) [#56893](nodejs/node#56893) - \[[`9e975f1a7d`](nodejs/node@9e975f1a7d)] - **doc**: fix link and history of `SourceMap` sections (Antoine du Hamel) [#57098](nodejs/node#57098) - \[[`64ce95b8fc`](nodejs/node@64ce95b8fc)] - **doc**: update `require(ESM)` history and stability status (Antoine du Hamel) [#55199](nodejs/node#55199) - \[[`697a39248b`](nodejs/node@697a39248b)] - **doc**: fix history of `process.features` (Antoine du Hamel) [#54897](nodejs/node#54897) - \[[`7c38e503a3`](nodejs/node@7c38e503a3)] - **doc**: add documentation for process.features (Marco Ippolito) [#54897](nodejs/node#54897) - \[[`c85b386a39`](nodejs/node@c85b386a39)] - **esm**: fix jsdoc type refs to `ModuleJobBase` in esm/loader (Jacob Smith) [#56499](nodejs/node#56499) - \[[`4813a6a66c`](nodejs/node@4813a6a66c)] - **esm**: throw `ERR_REQUIRE_ESM` instead of `ERR_INTERNAL_ASSERTION` (Antoine du Hamel) [#54868](nodejs/node#54868) - \[[`0d327c8e47`](nodejs/node@0d327c8e47)] - **esm**: refactor `get_format` (Antoine du Hamel) [#53872](nodejs/node#53872) - \[[`e87db6c9bc`](nodejs/node@e87db6c9bc)] - **events**: add hasEventListener util for validate (Sunghoon) [#55230](nodejs/node#55230) - \[[`674b932f33`](nodejs/node@674b932f33)] - **http**: don't emit error after destroy (Robert Nagy) [#55457](nodejs/node#55457) - \[[`4c24ef8f71`](nodejs/node@4c24ef8f71)] - **http2**: omit server name when HTTP2 host is IP address (islandryu) [#56530](nodejs/node#56530) - \[[`533afe8124`](nodejs/node@533afe8124)] - **lib**: reduce amount of caught URL errors (Yagiz Nizipli) [#52658](nodejs/node#52658) - \[[`34221a1d6e`](nodejs/node@34221a1d6e)] - **lib**: allow CJS source map cache to be reclaimed (Chengzhong Wu) [#51711](nodejs/node#51711) - \[[`f13589f1f9`](nodejs/node@f13589f1f9)] - **lib,src**: iterate module requests of a module wrap in JS (Chengzhong Wu) [#52058](nodejs/node#52058) - \[[`6afee9ea43`](nodejs/node@6afee9ea43)] - **meta**: move one or more collaborators to emeritus (Node.js GitHub Bot) [#56580](nodejs/node#56580) - \[[`85bb738739`](nodejs/node@85bb738739)] - **meta**: add codeowners of security release document (Rafael Gonzaga) [#56521](nodejs/node#56521) - \[[`48f9ca0992`](nodejs/node@48f9ca0992)] - **meta**: move one or more collaborators to emeritus (Node.js GitHub Bot) [#56342](nodejs/node#56342) - \[[`4d724121b4`](nodejs/node@4d724121b4)] - **meta**: move MoLow to TSC regular member (Moshe Atlow) [#56276](nodejs/node#56276) - \[[`5e2dab7868`](nodejs/node@5e2dab7868)] - **module**: fix bad `require.resolve` with option paths for `.` and `..` (Dario Piotrowicz) [#56735](nodejs/node#56735) - \[[`f507c05060`](nodejs/node@f507c05060)] - **module**: simplify --inspect-brk handling (Joyee Cheung) [#55679](nodejs/node#55679) - \[[`ed2d373e5a`](nodejs/node@ed2d373e5a)] - **module**: disable require(esm) for policy and network import (Joyee Cheung) [#56927](nodejs/node#56927) - \[[`de313b2336`](nodejs/node@de313b2336)] - **(SEMVER-MINOR)** **module**: only emit require(esm) warning under --trace-require-module (Joyee Cheung) [#56194](nodejs/node#56194) - \[[`3d89e6b6fa`](nodejs/node@3d89e6b6fa)] - **module**: mark evaluation rejection in require(esm) as handled (Joyee Cheung) [#56122](nodejs/node#56122) - \[[`e01dd4bd4f`](nodejs/node@e01dd4bd4f)] - **module**: do not warn when require(esm) comes from node_modules (Joyee Cheung) [#55960](nodejs/node#55960) - \[[`011e6e0032`](nodejs/node@011e6e0032)] - **module**: fix error thrown from require(esm) hitting TLA repeatedly (Joyee Cheung) [#55520](nodejs/node#55520) - \[[`fdf50289c6`](nodejs/node@fdf50289c6)] - **module**: trim off internal stack frames for require(esm) warnings (Joyee Cheung) [#55496](nodejs/node#55496) - \[[`8d33f78ca5`](nodejs/node@8d33f78ca5)] - **module**: allow ESM that failed to be required to be re-imported (Joyee Cheung) [#55502](nodejs/node#55502) - \[[`8192dd6cf3`](nodejs/node@8192dd6cf3)] - **module**: include module information in require(esm) warning (Joyee Cheung) [#55397](nodejs/node#55397) - \[[`1db210a0ec`](nodejs/node@1db210a0ec)] - **module**: check --experimental-require-module separately from detection (Joyee Cheung) [#55250](nodejs/node#55250) - \[[`cf8701c866`](nodejs/node@cf8701c866)] - **module**: use kNodeModulesRE to detect node_modules (Joyee Cheung) [#55243](nodejs/node#55243) - \[[`dc66632261`](nodejs/node@dc66632261)] - **module**: support 'module.exports' interop export in require(esm) (Guy Bedford) [#54563](nodejs/node#54563) - \[[`1ac1dda9a4`](nodejs/node@1ac1dda9a4)] - **(SEMVER-MINOR)** **module**: unflag --experimental-require-module (Joyee Cheung) [#55085](nodejs/node#55085) - \[[`683c93f45f`](nodejs/node@683c93f45f)] - **module**: refator ESM loader for adding future synchronous hooks (Joyee Cheung) [#54769](nodejs/node#54769) - \[[`df8a045afe`](nodejs/node@df8a045afe)] - **(SEMVER-MINOR)** **module**: implement the "module-sync" exports condition (Joyee Cheung) [#54648](nodejs/node#54648) - \[[`249d82b686`](nodejs/node@249d82b686)] - **module**: report unfinished TLA in ambiguous modules (Antoine du Hamel) [#54980](nodejs/node#54980) - \[[`1925d729f9`](nodejs/node@1925d729f9)] - **module**: remove bogus assertion in CJS entrypoint handling with --import (Joyee Cheung) [#54592](nodejs/node#54592) - \[[`d1331fccb2`](nodejs/node@d1331fccb2)] - **module**: do not warn for typeless package.json when there isn't one (Joyee Cheung) [#54045](nodejs/node#54045) - \[[`9916458b44`](nodejs/node@9916458b44)] - **(SEMVER-MINOR)** **module**: unflag detect-module (Geoffrey Booth) [#53619](nodejs/node#53619) - \[[`f9dc1eaef5`](nodejs/node@f9dc1eaef5)] - **(SEMVER-MINOR)** **module**: add \__esModule to require()'d ESM (Joyee Cheung) [#52166](nodejs/node#52166) - \[[`b86f575504`](nodejs/node@b86f575504)] - **module**: do not set CJS variables for Worker eval (Antoine du Hamel) [#53050](nodejs/node#53050) - \[[`30ed93db12`](nodejs/node@30ed93db12)] - **module**: cache synchronous module jobs before linking (Joyee Cheung) [#52868](nodejs/node#52868) - \[[`a03faf289d`](nodejs/node@a03faf289d)] - **module**: support ESM detection in the CJS loader (Joyee Cheung) [#52047](nodejs/node#52047) - \[[`b07ad39bda`](nodejs/node@b07ad39bda)] - **module**: detect ESM syntax by trying to recompile as SourceTextModule (Joyee Cheung) [#52413](nodejs/node#52413) - \[[`132a5c190f`](nodejs/node@132a5c190f)] - **module**: eliminate performance cost of detection for cjs entry (Geoffrey Booth) [#52093](nodejs/node#52093) - \[[`55a57a189f`](nodejs/node@55a57a189f)] - **node-api**: remove deprecated attribute from napi_module_register (Vladimir Morozov) [#56162](nodejs/node#56162) - \[[`4fba01911d`](nodejs/node@4fba01911d)] - **(SEMVER-MINOR)** **process**: add process.features.require_module (Joyee Cheung) [#55241](nodejs/node#55241) - \[[`c0fad18ac0`](nodejs/node@c0fad18ac0)] - **src**: add nullptr handling from X509\_STORE_new() (Burkov Egor) [#56700](nodejs/node#56700) - \[[`5b88d48cbb`](nodejs/node@5b88d48cbb)] - **src**: add default value for RSACipherConfig mode field (Burkov Egor) [#56701](nodejs/node#56701) - \[[`e3b69e57a6`](nodejs/node@e3b69e57a6)] - **src**: fix build with GCC 15 (tjuhaszrh) [#56740](nodejs/node#56740) - \[[`a7c1d8c0e8`](nodejs/node@a7c1d8c0e8)] - **src**: initialize FSReqWrapSync in path that uses it (Michaël Zasso) [#56613](nodejs/node#56613) - \[[`c06ac66356`](nodejs/node@c06ac66356)] - **src**: fix undefined script name in error source (Chengzhong Wu) [#56502](nodejs/node#56502) - \[[`500f3ccc66`](nodejs/node@500f3ccc66)] - **src**: lock the thread properly in snapshot builder (Joyee Cheung) [#56327](nodejs/node#56327) - \[[`cf25a5edeb`](nodejs/node@cf25a5edeb)] - **src**: drain platform tasks before creating startup snapshot (Chengzhong Wu) [#56403](nodejs/node#56403) - \[[`8af1b53bb8`](nodejs/node@8af1b53bb8)] - **src**: safely remove the last line from dotenv (Shima Ryuhei) [#55982](nodejs/node#55982) - \[[`bb57e909aa`](nodejs/node@bb57e909aa)] - **src**: remove `base64` from `process.versions` (Richard Lau) [#53442](nodejs/node#53442) - \[[`b8c89a693e`](nodejs/node@b8c89a693e)] - **src**: add `--env-file-if-exists` flag (Bosco Domingo) [#53060](nodejs/node#53060) - \[[`9097de073a`](nodejs/node@9097de073a)] - **src**: don't match after `--` in `Dotenv::GetPathFromArgs` (Aviv Keller) [#54237](nodejs/node#54237) - \[[`ececd225b6`](nodejs/node@ececd225b6)] - **src**: implement IsInsideNodeModules() in C++ (Joyee Cheung) [#55286](nodejs/node#55286) - \[[`18593b7d3e`](nodejs/node@18593b7d3e)] - **src**: refactor embedded entrypoint loading (Joyee Cheung) [#53573](nodejs/node#53573) - \[[`d7aefc0524`](nodejs/node@d7aefc0524)] - **stream**: fix typo in ReadableStreamBYOBReader.readIntoRequests (Mattias Buelens) [#56560](nodejs/node#56560) - \[[`fe5f7bcd47`](nodejs/node@fe5f7bcd47)] - **stream**: validate undefined sizeAlgorithm in WritableStream (Jason Zhang) [#56067](nodejs/node#56067) - \[[`12744c1fd4`](nodejs/node@12744c1fd4)] - **test**: reduce number of written chunks (Luigi Pinca) [#56757](nodejs/node#56757) - \[[`e121d7d62c`](nodejs/node@e121d7d62c)] - **test**: fix invalid common.mustSucceed() usage (Luigi Pinca) [#56756](nodejs/node#56756) - \[[`11b82de7ed`](nodejs/node@11b82de7ed)] - **test**: use strict mode in global setters test (Rich Trott) [#56742](nodejs/node#56742) - \[[`f9d6e35c5e`](nodejs/node@f9d6e35c5e)] - **test**: cleanup and simplify test-crypto-aes-wrap (James M Snell) [#56748](nodejs/node#56748) - \[[`792ce98699`](nodejs/node@792ce98699)] - **test**: do not use common.isMainThread (Luigi Pinca) [#56768](nodejs/node#56768) - \[[`4f0cf475e0`](nodejs/node@4f0cf475e0)] - **test**: add test that uses multibyte for path and resolves modules (yamachu) [#56696](nodejs/node#56696) - \[[`3bc8d273c2`](nodejs/node@3bc8d273c2)] - **test**: add missing test for env file (Jonas) [#56642](nodejs/node#56642) - \[[`ad39367712`](nodejs/node@ad39367712)] - **test**: enforce strict mode in test-zlib-const (Rich Trott) [#56689](nodejs/node#56689) - \[[`ca79914137`](nodejs/node@ca79914137)] - **test**: test-stream-compose.js doesn't need internals (Meghan Denny) [#56619](nodejs/node#56619) - \[[`08bde67101`](nodejs/node@08bde67101)] - **test**: add maxCount and gcOptions to gcUntil() (Joyee Cheung) [#56522](nodejs/node#56522) - \[[`40a0f6f6e3`](nodejs/node@40a0f6f6e3)] - **test**: mark test-worker-prof as flaky on smartos (Joyee Cheung) [#56583](nodejs/node#56583) - \[[`d17bf2f62a`](nodejs/node@d17bf2f62a)] - **test**: update test-child-process-bad-stdio to use node:test (Colin Ihrig) [#56562](nodejs/node#56562) - \[[`5660b99b43`](nodejs/node@5660b99b43)] - **test**: disable openssl 3.4.0 incompatible tests (Jelle van der Waa) [#56160](nodejs/node#56160) - \[[`861c99f351`](nodejs/node@861c99f351)] - **test**: make test-crypto-hash compatible with OpenSSL > 3.4.0 (Jelle van der Waa) [#56160](nodejs/node#56160) - \[[`597a39b5f9`](nodejs/node@597a39b5f9)] - **test**: update error code in tls-psk-circuit for for OpenSSL 3.4 (sebastianas) [#56420](nodejs/node#56420) - \[[`721e9e1217`](nodejs/node@721e9e1217)] - **test**: add initial test426 coverage (Chengzhong Wu) [#56436](nodejs/node#56436) - \[[`cfe5380c44`](nodejs/node@cfe5380c44)] - **test**: update test-set-http-max-http-headers to use node:test (Colin Ihrig) [#56439](nodejs/node#56439) - \[[`51ff71a87a`](nodejs/node@51ff71a87a)] - **test**: update test-child-process-windows-hide to use node:test (Colin Ihrig) [#56437](nodejs/node#56437) - \[[`d6aca0cd89`](nodejs/node@d6aca0cd89)] - **test**: increase spin for eventloop test on s390 (Michael Dawson) [#56228](nodejs/node#56228) - \[[`82461af6ec`](nodejs/node@82461af6ec)] - **test**: migrate message eval tests from Python to JS (Yiyun Lei) [#50482](nodejs/node#50482) - \[[`5083bbb2bb`](nodejs/node@5083bbb2bb)] - **test**: remove async-hooks/test-writewrap flaky designation (Luigi Pinca) [#56048](nodejs/node#56048) - \[[`b4b26e973d`](nodejs/node@b4b26e973d)] - **test**: deflake test-esm-loader-hooks-inspect-brk (Luigi Pinca) [#56050](nodejs/node#56050) - \[[`182be26b8a`](nodejs/node@182be26b8a)] - **test**: update WPT for url to [`67880a4`](nodejs/node@67880a4) (Node.js GitHub Bot) [#55999](nodejs/node#55999) - \[[`e67a84902f`](nodejs/node@e67a84902f)] - **test_runner**: remove unused errors (Pietro Marchini) [#56607](nodejs/node#56607) - \[[`4274c6a015`](nodejs/node@4274c6a015)] - **test_runner**: run single test file benchmark (Pietro Marchini) [#56479](nodejs/node#56479) - \[[`e57004458b`](nodejs/node@e57004458b)] - **tools**: update doc to new version (Node.js GitHub Bot) [#56259](nodejs/node#56259) - \[[`e039f2b571`](nodejs/node@e039f2b571)] - **tools**: do not throw on missing `create-release-proposal.sh` (Antoine du Hamel) [#56704](nodejs/node#56704) - \[[`9a1e314498`](nodejs/node@9a1e314498)] - **tools**: fix tools-deps-update (Daniel Lemire) [#56684](nodejs/node#56684) - \[[`d6469b5287`](nodejs/node@d6469b5287)] - **tools**: do not throw on missing `create-release-proposal.sh` (Antoine du Hamel) [#56695](nodejs/node#56695) - \[[`e162476fdc`](nodejs/node@e162476fdc)] - **tools**: fix permissions in `lint-release-proposal` workflow (Antoine du Hamel) [#56614](nodejs/node#56614) - \[[`914b4675c8`](nodejs/node@914b4675c8)] - **tools**: edit `create-release-proposal` workflow (Antoine du Hamel) [#56540](nodejs/node#56540) - \[[`4ff9aa7235`](nodejs/node@4ff9aa7235)] - **tools**: validate commit list as part of `lint-release-commit` (Antoine du Hamel) [#56291](nodejs/node#56291) - \[[`589d0ae8ea`](nodejs/node@589d0ae8ea)] - **tools**: fix loong64 build failed (Xiao-Tao) [#56466](nodejs/node#56466) - \[[`bc8c39bff8`](nodejs/node@bc8c39bff8)] - **tools**: disable unneeded rule ignoring in Python linting (Rich Trott) [#56429](nodejs/node#56429) - \[[`3b130002bb`](nodejs/node@3b130002bb)] - **tools**: add release line label when opening release proposal (Antoine du Hamel) [#56317](nodejs/node#56317) - \[[`73b5c16684`](nodejs/node@73b5c16684)] - **(SEMVER-MINOR)** **worker**: add postMessageToThread (Paolo Insogna) [#53682](nodejs/node#53682) </details> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. 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[Bug]: getAbsolutePath workaround fails with Node 22.12.0 storybookjs/storybook#30123

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[v20.x] backport unflagging of require(esm) to v20 #56927

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bug report: eslint-plugin-no-autofix with ESM-only packages aladdin-add/eslint-plugin#104

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v20.19.0 proposal #57349

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module: unflag --experimental-require-module #55085

module: unflag --experimental-require-module #55085

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module: unflag --experimental-require-module #55085

module: unflag --experimental-require-module #55085

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Summary:

Impact on dual packages

Impact on esm-only packages

Impact on faux-esm packages

Impact on cjs packages

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