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lib: move GLOBAL and root aliases to EOL #31167

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lib: move GLOBAL and root aliases to EOL #31167

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jasnell
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@jasnell jasnell commented Jan 2, 2020

GLOBAL and root have been long deprecated.

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • documentation is changed or added
  • commit message follows commit guidelines

@jasnell jasnell added semver-major PRs that contain breaking changes and should be released in the next major version. deprecations Issues and PRs related to deprecations. labels Jan 2, 2020
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Trott commented Jan 2, 2020 •
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Might we decide to never EOL this, similar to how we are likely to never remove sys? Isn't the cost of leaving around root and GLOBAL as deprecated aliases for global close to zero, while the cost for the ecosystem of removing them is non-zero?

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jasnell commented Jan 2, 2020

The cost of keeping these around is definitely not zero really as it contributes to a significant amount of legacy cruft that bloats the code and makes things more difficult to maintain in the long run. I'm fine with keeping these around longer if there are actively used modules in the ecosystem that still use them; alternatively, we can proactively open PR fixes in any module that does.

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addaleax commented Jan 3, 2020

This should be okay, given that the runtime deprecation effectively already makes these broken, but the maintenance cost here is close to zero, to be fair.

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Trott commented Jan 6, 2020

This change causes underscore tests to fail in CITGM because GLOBAL is used in test/object.js in the most recent release of underscore. https://ci.nodejs.org/job/citgm-smoker/2189/testReport/

This issue was fixed by @BridgeAR in March 2019 but that change has yet to make it into a release. jashkenas/underscore@5304f86

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jashkenas commented Jan 6, 2020 •
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This issue was fixed by @BridgeAR in March 2019 but that change has yet to make it into a release. jashkenas/underscore@5304f86

I was pinged by @BridgeAR today, and published the updated test case as part of version 1.9.2.

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BridgeAR commented Jan 9, 2020

@nodejs/tsc PTAL. This could use some reviews.

Trott
Trott reviewed Jan 10, 2020
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lib/internal/bootstrap/node.js
}, `'${name}' is deprecated, use 'global'`, 'DEP0016');
}

ObjectDefineProperties(global, {
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With this line removed, the file fails linting because ObjectDefineProperties is defined but never used.

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jasnell commented Feb 3, 2020

Ping @nodejs/tsc ... needs one more TSC signoff

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jasnell commented Feb 3, 2020

On these EOL PRs, I'm perfectly fine to close these without action if there's no TSC support.

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jasnell commented Feb 4, 2020

This has two TSC signoffs so technically could land but @Trott's outstanding concern should be addressed. Given that there are several of these, likely a good idea to discuss on the TSC call. Adding tsc-agenda

@jasnell jasnell added the tsc-agenda Issues and PRs to discuss during the meetings of the TSC. label Feb 4, 2020
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Trott commented Feb 4, 2020

This has two TSC signoffs so technically could land

Needs a CI and a CITGM, but yeah, it can land otherwise.

Hopefully, TSC members will chime in here rather than waiting for the meeting. The meeting will only be attended by a fraction of the TSC, whereas the issue tracker allows us all to participate.

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CI: https://ci.nodejs.org/job/node-test-pull-request/28907/

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jasnell commented Feb 4, 2020

Lint failed to run properly, trying again.

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CI: https://ci.nodejs.org/job/node-test-pull-request/28918/

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jasnell commented Feb 4, 2020

CITGM: https://ci.nodejs.org/view/Node.js-citgm/job/citgm-smoker/2255/

@jasnell jasnell added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Feb 4, 2020
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jasnell commented Feb 5, 2020

CITGM results do not appear to show any relevant failures

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lgtm

jasnell added a commit that referenced this pull request Feb 6, 2020
@jasnell
lib: move GLOBAL and root aliases to EOL
ec0dd6f 
GLOBAL and root have been long deprecated.

PR-URL: #31167
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Daniel Bevenius <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
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jasnell commented Feb 6, 2020

Landed in ec0dd6f

@jasnell jasnell closed this Feb 6, 2020
cjihrig added a commit to cjihrig/node that referenced this pull request Feb 9, 2020
@cjihrig
doc: update pr-url for DEP0016 EOL
cd0f5a2 
Refs: nodejs#31167
PR-URL: nodejs#31675
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
@BethGriggs BethGriggs mentioned this pull request Mar 10, 2020
Merged
BethGriggs added a commit that referenced this pull request Apr 14, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
705660b 
Notable changes:

* (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
* (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
* (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
* (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
* (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell) [#31169](#31169)
* (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
* (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
* (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
* (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

* (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps) [#32454](#32454)
* (SEMVER-MAJOR) win: block running on EOL Windows versions (João Reis)
  [#31954](#31954)

* (SEMVER-MAJOR) deps: update V8 to 8.1.307.20 (Matheus Marchini)
  [#32116](#32116)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 15, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
2754ac8 
Notable changes:

* (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
* (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
* (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
* (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
* (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell) [#31169](#31169)
* (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
* (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
* (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
* (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

* (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps) [#32454](#32454)
* (SEMVER-MAJOR) win: block running on EOL Windows versions (João Reis)
  [#31954](#31954)

* (SEMVER-MAJOR) deps: update V8 to 8.1.307.20 (Matheus Marchini)
  [#32116](#32116)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 20, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
7efc4f7 
- (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
- (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
- (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
- (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
- (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell)[#31169](#31169)
- (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
- (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
- (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
- (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

- src: migrate to new V8 ArrayBuffer API (Thang Tran)
  [#30782](#30782)

It is possible that this change will impact some native addons using
`ArrayBuffer`.

- (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps)[#32454](#32454)
- (SEMVER-MAJOR) doc: update cross compiler machine for Linux armv7
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: update Centos/RHEL releases use devtoolset-8
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: remove SmartOS from official binaries
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) win: block running on EOL Windows versions
  (João Reis) [#31954](#31954)

It is expected that there will be an ABI mismatch on ARM between the
Node.js binary and native addons.
- [#30786](#30786)

- (SEMVER-MAJOR) deps: update V8 to 8.1.307.20
  (Matheus Marchini) [#32116](#32116)

- cli, report: move --report-on-fatalerror to stable
  (Colin Ihrig) [#32496](#32496)
- deps: upgrade to libuv 1.37.0
  (Colin Ihrig) [#32866](#32866)
- fs: add fs/promises alias module
  (Gus Caplan) [#31553](#31553)
- module: remove experimental modules warning
  (Guy Bedford) [#31974](#31974)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 20, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
19df6d2 
Deprecations:

- (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
- (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
- (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
- (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
- (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell)[#31169](#31169)
- (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
- (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
- (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
- (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

ECMAScript Modules - Experimental Warning Removal:

- module: remove experimental modules warning
  (Guy Bedford) [#31974](#31974)

In Node.js 13 we removed the need to include the --experimental-modules
flag, but when running EcmaScript Modules in Node.js, this would still
result in a warning ExperimentalWarning: The ESM module loader is
experimental.

As of Node.js 14 there is no longer this warning when using ESM in
Node.js. However, the ESM implementation in Node.js remains
experimental. As per our stability index: “The feature is not subject
to Semantic Versioning rules. Non-backward compatible changes or
removal may occur in any future release.” Users should be cautious when
using the feature in production environments.

Please keep in mind that the implementation of ESM in Node.js differs
from the developer experience you might be familiar with. Most
transpilation workflows support features such as optional file
extensions or JSON modules that the Node.js ESM implementation does not
support. It is highly likely that modules from transpiled environments
will require a certain degree of refactoring to work in Node.js. It is
worth mentioning that many of our design decisions were made with two
primary goals. Spec compliance and Web Compatibility. It is our belief
that the current implementation offers a future proof model to
authoring ESM modules that paves the path to Universal JavaScript.
Please read more in our documentation.

The ESM implementation in Node.js is still experimental but we do believe
that we are getting very close to being able to call ESM in Node.js
“stable”. Removing the warning is a huge step in that direction.

Migrate to new V8 ArrayBuffer API:

- src: migrate to new V8 ArrayBuffer API (Thang Tran)
  [#30782](#30782)

It is possible that this change will impact some native addons using
`ArrayBuffer`.

Toolchain and Compiler Upgrades:

- (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps)[#32454](#32454)
- (SEMVER-MAJOR) doc: update cross compiler machine for Linux armv7
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: update Centos/RHEL releases use devtoolset-8
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: remove SmartOS from official binaries
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) win: block running on EOL Windows versions
  (João Reis) [#31954](#31954)

It is expected that there will be an ABI mismatch on ARM between the
Node.js binary and native addons. Native addons are only broken if they
interact with `std::shared_ptr`. This is expected to be fixed in a
later version of Node.js 14.
- [#30786](#30786)

Update to V8 8.1:

- (SEMVER-MAJOR) deps: update V8 to 8.1.307.20
  (Matheus Marchini) [#32116](#32116)

Other Notable Changes:

- cli, report: move --report-on-fatalerror to stable
  (Colin Ihrig) [#32496](#32496)
- deps: upgrade to libuv 1.37.0
  (Colin Ihrig) [#32866](#32866)
- fs: add fs/promises alias module
  (Gus Caplan) [#31553](#31553)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 21, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
75ed7a4 
Deprecations:

- (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
- (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
- (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
- (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
- (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell)[#31169](#31169)
- (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
- (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
- (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
- (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

ECMAScript Modules - Experimental Warning Removal:

- module: remove experimental modules warning
  (Guy Bedford) [#31974](#31974)

In Node.js 13 we removed the need to include the --experimental-modules
flag, but when running EcmaScript Modules in Node.js, this would still
result in a warning ExperimentalWarning: The ESM module loader is
experimental.

As of Node.js 14 there is no longer this warning when using ESM in
Node.js. However, the ESM implementation in Node.js remains
experimental. As per our stability index: “The feature is not subject
to Semantic Versioning rules. Non-backward compatible changes or
removal may occur in any future release.” Users should be cautious when
using the feature in production environments.

Please keep in mind that the implementation of ESM in Node.js differs
from the developer experience you might be familiar with. Most
transpilation workflows support features such as optional file
extensions or JSON modules that the Node.js ESM implementation does not
support. It is highly likely that modules from transpiled environments
will require a certain degree of refactoring to work in Node.js. It is
worth mentioning that many of our design decisions were made with two
primary goals. Spec compliance and Web Compatibility. It is our belief
that the current implementation offers a future proof model to
authoring ESM modules that paves the path to Universal JavaScript.
Please read more in our documentation.

The ESM implementation in Node.js is still experimental but we do believe
that we are getting very close to being able to call ESM in Node.js
“stable”. Removing the warning is a huge step in that direction.

Migrate to new V8 ArrayBuffer API:

- src: migrate to new V8 ArrayBuffer API (Thang Tran)
  [#30782](#30782)

It is possible that this change will impact some native addons using
`ArrayBuffer`.

Toolchain and Compiler Upgrades:

- (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps)[#32454](#32454)
- (SEMVER-MAJOR) doc: update cross compiler machine for Linux armv7
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: update Centos/RHEL releases use devtoolset-8
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: remove SmartOS from official binaries
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) win: block running on EOL Windows versions
  (João Reis) [#31954](#31954)

It is expected that there will be an ABI mismatch on ARM between the
Node.js binary and native addons. Native addons are only broken if they
interact with `std::shared_ptr`. This is expected to be fixed in a
later version of Node.js 14.
- [#30786](#30786)

Update to V8 8.1:

- (SEMVER-MAJOR) deps: update V8 to 8.1.307.20
  (Matheus Marchini) [#32116](#32116)

Other Notable Changes:

- cli, report: move --report-on-fatalerror to stable
  (Colin Ihrig) [#32496](#32496)
- deps: upgrade to libuv 1.37.0
  (Colin Ihrig) [#32866](#32866)
- fs: add fs/promises alias module
  (Gus Caplan) [#31553](#31553)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 21, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
73aa216 
Deprecations:

- (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
- (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
- (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
- (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
- (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell)[#31169](#31169)
- (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
- (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
- (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
- (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

ECMAScript Modules - Experimental Warning Removal:

- module: remove experimental modules warning
  (Guy Bedford) [#31974](#31974)

In Node.js 13 we removed the need to include the --experimental-modules
flag, but when running EcmaScript Modules in Node.js, this would still
result in a warning ExperimentalWarning: The ESM module loader is
experimental.

As of Node.js 14 there is no longer this warning when using ESM in
Node.js. However, the ESM implementation in Node.js remains
experimental. As per our stability index: “The feature is not subject
to Semantic Versioning rules. Non-backward compatible changes or
removal may occur in any future release.” Users should be cautious when
using the feature in production environments.

Please keep in mind that the implementation of ESM in Node.js differs
from the developer experience you might be familiar with. Most
transpilation workflows support features such as optional file
extensions or JSON modules that the Node.js ESM implementation does not
support. It is highly likely that modules from transpiled environments
will require a certain degree of refactoring to work in Node.js. It is
worth mentioning that many of our design decisions were made with two
primary goals. Spec compliance and Web Compatibility. It is our belief
that the current implementation offers a future proof model to
authoring ESM modules that paves the path to Universal JavaScript.
Please read more in our documentation.

The ESM implementation in Node.js is still experimental but we do believe
that we are getting very close to being able to call ESM in Node.js
“stable”. Removing the warning is a huge step in that direction.

New V8 ArrayBuffer API:

* **src**: migrate to new V8 ArrayBuffer API
  (Thang Tran) [#30782](#30782)

Multiple ArrayBuffers pointing to the same base address are no longer
allowed by V8. This may impact native addons.

Toolchain and Compiler Upgrades:

- (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps)[#32454](#32454)
- (SEMVER-MAJOR) doc: update cross compiler machine for Linux armv7
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: update Centos/RHEL releases use devtoolset-8
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: remove SmartOS from official binaries
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) win: block running on EOL Windows versions
  (João Reis) [#31954](#31954)

It is expected that there will be an ABI mismatch on ARM between the
Node.js binary and native addons. Native addons are only broken if they
interact with `std::shared_ptr`. This is expected to be fixed in a
later version of Node.js 14.
- [#30786](#30786)

Update to V8 8.1:

- (SEMVER-MAJOR) deps: update V8 to 8.1.307.20
  (Matheus Marchini) [#32116](#32116)

Other Notable Changes:

- cli, report: move --report-on-fatalerror to stable
  (Colin Ihrig) [#32496](#32496)
- deps: upgrade to libuv 1.37.0
  (Colin Ihrig) [#32866](#32866)
- fs: add fs/promises alias module
  (Gus Caplan) [#31553](#31553)

PR-URL: #32181
BethGriggs added a commit that referenced this pull request Apr 21, 2020
@BethGriggs
2020-04-21, Version 14.0.0 (Current)
372c7cc 
Deprecations:

- (SEMVER-MAJOR) crypto: move pbkdf2 without digest to EOL
  (James M Snell) [#31166](#31166)
- (SEMVER-MAJOR) fs: deprecate closing FileHandle on garbage collection
  (James M Snell) [#28396](#28396)
- (SEMVER-MAJOR) http: move OutboundMessage.prototype.flush to EOL
  (James M Snell) [#31164](#31164)
- (SEMVER-MAJOR) lib: move GLOBAL and root aliases to EOL
  (James M Snell) [#31167](#31167)
- (SEMVER-MAJOR) os: move tmpDir() to EOL
  (James M Snell)[#31169](#31169)
- (SEMVER-MAJOR) src: remove deprecated wasm type check
  (Clemens Backes) [#32116](#32116)
- (SEMVER-MAJOR) stream: move \_writableState.buffer to EOL
  (James M Snell) [#31165](#31165)
- (SEMVER-MINOR) doc: deprecate process.mainModule
  (Antoine du HAMEL) [#32232](#32232)
- (SEMVER-MINOR) doc: deprecate process.umask() with no arguments
  (Colin Ihrig) [#32499](#32499)

ECMAScript Modules - Experimental Warning Removal:

- module: remove experimental modules warning
  (Guy Bedford) [#31974](#31974)

In Node.js 13 we removed the need to include the --experimental-modules
flag, but when running EcmaScript Modules in Node.js, this would still
result in a warning ExperimentalWarning: The ESM module loader is
experimental.

As of Node.js 14 there is no longer this warning when using ESM in
Node.js. However, the ESM implementation in Node.js remains
experimental. As per our stability index: “The feature is not subject
to Semantic Versioning rules. Non-backward compatible changes or
removal may occur in any future release.” Users should be cautious when
using the feature in production environments.

Please keep in mind that the implementation of ESM in Node.js differs
from the developer experience you might be familiar with. Most
transpilation workflows support features such as optional file
extensions or JSON modules that the Node.js ESM implementation does not
support. It is highly likely that modules from transpiled environments
will require a certain degree of refactoring to work in Node.js. It is
worth mentioning that many of our design decisions were made with two
primary goals. Spec compliance and Web Compatibility. It is our belief
that the current implementation offers a future proof model to
authoring ESM modules that paves the path to Universal JavaScript.
Please read more in our documentation.

The ESM implementation in Node.js is still experimental but we do believe
that we are getting very close to being able to call ESM in Node.js
“stable”. Removing the warning is a huge step in that direction.

New V8 ArrayBuffer API:

* **src**: migrate to new V8 ArrayBuffer API
  (Thang Tran) [#30782](#30782)

Multiple ArrayBuffers pointing to the same base address are no longer
allowed by V8. This may impact native addons.

Toolchain and Compiler Upgrades:

- (SEMVER-MAJOR) build: update macos deployment target to 10.13 for 14.x
  (AshCripps)[#32454](#32454)
- (SEMVER-MAJOR) doc: update cross compiler machine for Linux armv7
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: update Centos/RHEL releases use devtoolset-8
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) doc: remove SmartOS from official binaries
  (Richard Lau) [#32812](#32812)
- (SEMVER-MAJOR) win: block running on EOL Windows versions
  (João Reis) [#31954](#31954)

It is expected that there will be an ABI mismatch on ARM between the
Node.js binary and native addons. Native addons are only broken if they
interact with `std::shared_ptr`. This is expected to be fixed in a
later version of Node.js 14.
- [#30786](#30786)

Update to V8 8.1:

- (SEMVER-MAJOR) deps: update V8 to 8.1.307.20
  (Matheus Marchini) [#32116](#32116)

Other Notable Changes:

- cli, report: move --report-on-fatalerror to stable
  (Colin Ihrig) [#32496](#32496)
- deps: upgrade to libuv 1.37.0
  (Colin Ihrig) [#32866](#32866)
- fs: add fs/promises alias module
  (Gus Caplan) [#31553](#31553)

PR-URL: #32181
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