deprecations.md

# Deprecated APIs

<!--introduced_in=v7.7.0-->

<!-- type=misc -->

Node.js APIs might be deprecated for any of the following reasons:

* Use of the API is unsafe.
* An improved alternative API is available.
* Breaking changes to the API are expected in a future major release.

Node.js uses four kinds of deprecations:

* Documentation-only
* Application (non-`node_modules` code only)
* Runtime (all code)
* End-of-Life

A Documentation-only deprecation is one that is expressed only within the
Node.js API docs. These generate no side-effects while running Node.js.
Some Documentation-only deprecations trigger a runtime warning when launched
with [`--pending-deprecation`][] flag (or its alternative,
`NODE_PENDING_DEPRECATION=1` environment variable), similarly to Runtime
deprecations below. Documentation-only deprecations that support that flag
are explicitly labeled as such in the
[list of Deprecated APIs](#list-of-deprecated-apis).

An Application deprecation for only non-`node_modules` code will, by default,
generate a process warning that will be printed to `stderr` the first time
the deprecated API is used in code that's not loaded from `node_modules`.
When the [`--throw-deprecation`][] command-line flag is used, a Runtime
deprecation will cause an error to be thrown. When
[`--pending-deprecation`][] is used, warnings will also be emitted for
code loaded from `node_modules`.

A runtime deprecation for all code is similar to the runtime deprecation
for non-`node_modules` code, except that it also emits a warning for
code loaded from `node_modules`.

An End-of-Life deprecation is used when functionality is or will soon be removed
from Node.js.

## Revoking deprecations

Occasionally, the deprecation of an API might be reversed. In such situations,
this document will be updated with information relevant to the decision.
However, the deprecation identifier will not be modified.

## List of deprecated APIs

### DEP0001: `http.OutgoingMessage.prototype.flush`

<!-- YAML
changes:
  - version: v14.0.0
    pr-url: https://github.com/nodejs/node/pull/31164
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v1.6.0
    pr-url: https://github.com/nodejs/node/pull/1156
    description: Runtime deprecation.
-->

Type: End-of-Life

`OutgoingMessage.prototype.flush()` has been removed. Use
`OutgoingMessage.prototype.flushHeaders()` instead.

### DEP0002: `require('_linklist')`

<!-- YAML
changes:
  - version: v8.0.0
    pr-url: https://github.com/nodejs/node/pull/12113
    description: End-of-Life.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v5.0.0
    pr-url: https://github.com/nodejs/node/pull/3078
    description: Runtime deprecation.
-->

Type: End-of-Life

The `_linklist` module is deprecated. Please use a userland alternative.

### DEP0003: `_writableState.buffer`

<!-- YAML
changes:
  - version: v14.0.0
    pr-url: https://github.com/nodejs/node/pull/31165
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.15
    pr-url: https://github.com/nodejs/node-v0.x-archive/pull/8826
    description: Runtime deprecation.
-->

Type: End-of-Life

The `_writableState.buffer` has been removed. Use `_writableState.getBuffer()`
instead.

### DEP0004: `CryptoStream.prototype.readyState`

<!-- YAML
changes:
  - version: v10.0.0
    pr-url: https://github.com/nodejs/node/pull/17882
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.4.0
    commit: 9c7f89bf56abd37a796fea621ad2e47dd33d2b82
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The `CryptoStream.prototype.readyState` property was removed.

### DEP0005: `Buffer()` constructor

<!-- YAML
changes:
  - version: v10.0.0
    pr-url: https://github.com/nodejs/node/pull/19524
    description: Runtime deprecation.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/4682
    description: Documentation-only deprecation.
-->

Type: Application (non-`node_modules` code only)

The `Buffer()` function and `new Buffer()` constructor are deprecated due to
API usability issues that can lead to accidental security issues.

As an alternative, use one of the following methods of constructing `Buffer`
objects:

* [`Buffer.alloc(size[, fill[, encoding]])`][alloc]: Create a `Buffer` with
  _initialized_ memory.
* [`Buffer.allocUnsafe(size)`][alloc_unsafe_size]: Create a `Buffer` with
  _uninitialized_ memory.
* [`Buffer.allocUnsafeSlow(size)`][]: Create a `Buffer` with _uninitialized_
  memory.
* [`Buffer.from(array)`][]: Create a `Buffer` with a copy of `array`
* [`Buffer.from(arrayBuffer[, byteOffset[, length]])`][from_arraybuffer] -
  Create a `Buffer` that wraps the given `arrayBuffer`.
* [`Buffer.from(buffer)`][]: Create a `Buffer` that copies `buffer`.
* [`Buffer.from(string[, encoding])`][from_string_encoding]: Create a `Buffer`
  that copies `string`.

Without `--pending-deprecation`, runtime warnings occur only for code not in
`node_modules`. This means there will not be deprecation warnings for
`Buffer()` usage in dependencies. With `--pending-deprecation`, a runtime
warning results no matter where the `Buffer()` usage occurs.

### DEP0006: `child_process` `options.customFds`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25279
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.14
    description: Runtime deprecation.
  - version: v0.5.10
    description: Documentation-only deprecation.
-->

Type: End-of-Life

Within the [`child_process`][] module's `spawn()`, `fork()`, and `exec()`
methods, the `options.customFds` option is deprecated. The `options.stdio`
option should be used instead.

### DEP0007: Replace `cluster` `worker.suicide` with `worker.exitedAfterDisconnect`

<!-- YAML
changes:
  - version: v9.0.0
    pr-url: https://github.com/nodejs/node/pull/13702
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/3747
    description: Runtime deprecation.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/3743
    description: Documentation-only deprecation.
-->

Type: End-of-Life

In an earlier version of the Node.js `cluster`, a boolean property with the name
`suicide` was added to the `Worker` object. The intent of this property was to
provide an indication of how and why the `Worker` instance exited. In Node.js
6.0.0, the old property was deprecated and replaced with a new
[`worker.exitedAfterDisconnect`][] property. The old property name did not
precisely describe the actual semantics and was unnecessarily emotion-laden.

### DEP0008: `require('node:constants')`

<!-- YAML
changes:
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.3.0
    pr-url: https://github.com/nodejs/node/pull/6534
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The `node:constants` module is deprecated. When requiring access to constants
relevant to specific Node.js builtin modules, developers should instead refer
to the `constants` property exposed by the relevant module. For instance,
`require('node:fs').constants` and `require('node:os').constants`.

### DEP0009: `crypto.pbkdf2` without digest

<!-- YAML
changes:
  - version: v14.0.0
    pr-url: https://github.com/nodejs/node/pull/31166
    description: End-of-Life (for `digest === null`).
  - version: v11.0.0
    pr-url: https://github.com/nodejs/node/pull/22861
    description: Runtime deprecation (for `digest === null`).
  - version: v8.0.0
    pr-url: https://github.com/nodejs/node/pull/11305
    description: End-of-Life (for `digest === undefined`).
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/4047
    description: Runtime deprecation (for `digest === undefined`).
-->

Type: End-of-Life

Use of the [`crypto.pbkdf2()`][] API without specifying a digest was deprecated
in Node.js 6.0 because the method defaulted to using the non-recommended
`'SHA1'` digest. Previously, a deprecation warning was printed. Starting in
Node.js 8.0.0, calling `crypto.pbkdf2()` or `crypto.pbkdf2Sync()` with
`digest` set to `undefined` will throw a `TypeError`.

Beginning in Node.js v11.0.0, calling these functions with `digest` set to
`null` would print a deprecation warning to align with the behavior when `digest`
is `undefined`.

Now, however, passing either `undefined` or `null` will throw a `TypeError`.

### DEP0010: `crypto.createCredentials`

<!-- YAML
changes:
  - version: v11.0.0
    pr-url: https://github.com/nodejs/node/pull/21153
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.13
    pr-url: https://github.com/nodejs/node-v0.x-archive/pull/7265
    description: Runtime deprecation.
-->

Type: End-of-Life

The `crypto.createCredentials()` API was removed. Please use
[`tls.createSecureContext()`][] instead.

### DEP0011: `crypto.Credentials`

<!-- YAML
changes:
  - version: v11.0.0
    pr-url: https://github.com/nodejs/node/pull/21153
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.13
    pr-url: https://github.com/nodejs/node-v0.x-archive/pull/7265
    description: Runtime deprecation.
-->

Type: End-of-Life

The `crypto.Credentials` class was removed. Please use [`tls.SecureContext`][]
instead.

### DEP0012: `Domain.dispose`

<!-- YAML
changes:
  - version: v9.0.0
    pr-url: https://github.com/nodejs/node/pull/15412
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.7
    pr-url: https://github.com/nodejs/node-v0.x-archive/pull/5021
    description: Runtime deprecation.
-->

Type: End-of-Life

`Domain.dispose()` has been removed. Recover from failed I/O actions
explicitly via error event handlers set on the domain instead.

### DEP0013: `fs` asynchronous function without callback

<!-- YAML
changes:
  - version: v10.0.0
    pr-url: https://github.com/nodejs/node/pull/18668
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/7897
    description: Runtime deprecation.
-->

Type: End-of-Life

Calling an asynchronous function without a callback throws a `TypeError`
in Node.js 10.0.0 onwards. See <https://github.com/nodejs/node/pull/12562>.

### DEP0014: `fs.read` legacy String interface

<!-- YAML
changes:
  - version: v8.0.0
    pr-url: https://github.com/nodejs/node/pull/9683
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/4525
    description: Runtime deprecation.
  - version: v0.1.96
    commit: c93e0aaf062081db3ec40ac45b3e2c979d5759d6
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The [`fs.read()`][] legacy `String` interface is deprecated. Use the `Buffer`
API as mentioned in the documentation instead.

### DEP0015: `fs.readSync` legacy String interface

<!-- YAML
changes:
  - version: v8.0.0
    pr-url: https://github.com/nodejs/node/pull/9683
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/4525
    description: Runtime deprecation.
  - version: v0.1.96
    commit: c93e0aaf062081db3ec40ac45b3e2c979d5759d6
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The [`fs.readSync()`][] legacy `String` interface is deprecated. Use the
`Buffer` API as mentioned in the documentation instead.

### DEP0016: `GLOBAL`/`root`

<!-- YAML
changes:
  - version: v14.0.0
    pr-url: https://github.com/nodejs/node/pull/31167
    description: End-of-Life.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/1838
    description: Runtime deprecation.
-->

Type: End-of-Life

The `GLOBAL` and `root` aliases for the `global` property were deprecated
in Node.js 6.0.0 and have since been removed.

### DEP0017: `Intl.v8BreakIterator`

<!-- YAML
changes:
  - version: v9.0.0
    pr-url: https://github.com/nodejs/node/pull/15238
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/8908
    description: Runtime deprecation.
-->

Type: End-of-Life

`Intl.v8BreakIterator` was a non-standard extension and has been removed.
See [`Intl.Segmenter`](https://github.com/tc39/proposal-intl-segmenter).

### DEP0018: Unhandled promise rejections

<!-- YAML
changes:
  - version: v15.0.0
    pr-url: https://github.com/nodejs/node/pull/35316
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/8217
    description: Runtime deprecation.
-->

Type: End-of-Life

Unhandled promise rejections are deprecated. By default, promise rejections
that are not handled terminate the Node.js process with a non-zero exit
code. To change the way Node.js treats unhandled rejections, use the
[`--unhandled-rejections`][] command-line option.

### DEP0019: `require('.')` resolved outside directory

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/26973
    description: Removed functionality.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v1.8.1
    pr-url: https://github.com/nodejs/node/pull/1363
    description: Runtime deprecation.
-->

Type: End-of-Life

In certain cases, `require('.')` could resolve outside the package directory.
This behavior has been removed.

### DEP0020: `Server.connections`

<!-- YAML
changes:
  - version: v15.0.0
    pr-url: https://github.com/nodejs/node/pull/33647
    description: Server.connections has been removed.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.9.7
    pr-url: https://github.com/nodejs/node-v0.x-archive/pull/4595
    description: Runtime deprecation.
-->

Type: End-of-Life

The `Server.connections` property was deprecated in Node.js v0.9.7 and has
been removed. Please use the [`Server.getConnections()`][] method instead.

### DEP0021: `Server.listenFD`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/27127
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.7.12
    commit: 41421ff9da1288aa241a5e9dcf915b685ade1c23
    description: Runtime deprecation.
-->

Type: End-of-Life

The `Server.listenFD()` method was deprecated and removed. Please use
[`Server.listen({fd: <number>})`][] instead.

### DEP0022: `os.tmpDir()`

<!-- YAML
changes:
  - version: v14.0.0
    pr-url: https://github.com/nodejs/node/pull/31169
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/6739
    description: Runtime deprecation.
-->

Type: End-of-Life

The `os.tmpDir()` API was deprecated in Node.js 7.0.0 and has since been
removed. Please use [`os.tmpdir()`][] instead.

### DEP0023: `os.getNetworkInterfaces()`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25280
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.6.0
    commit: 37bb37d151fb6ee4696730e63ff28bb7a4924f97
    description: Runtime deprecation.
-->

Type: End-of-Life

The `os.getNetworkInterfaces()` method is deprecated. Please use the
[`os.networkInterfaces()`][] method instead.

### DEP0024: `REPLServer.prototype.convertToContext()`

<!-- YAML
changes:
  - version: v9.0.0
    pr-url: https://github.com/nodejs/node/pull/13434
    description: End-of-Life.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/7829
    description: Runtime deprecation.
-->

Type: End-of-Life

The `REPLServer.prototype.convertToContext()` API has been removed.

### DEP0025: `require('node:sys')`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v1.0.0
    pr-url: https://github.com/nodejs/node/pull/317
    description: Runtime deprecation.
-->

Type: Runtime

The `node:sys` module is deprecated. Please use the [`util`][] module instead.

### DEP0026: `util.print()`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25377
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.3
    commit: 896b2aa7074fc886efd7dd0a397d694763cac7ce
    description: Runtime deprecation.
-->

Type: End-of-Life

`util.print()` has been removed. Please use [`console.log()`][] instead.

### DEP0027: `util.puts()`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25377
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.3
    commit: 896b2aa7074fc886efd7dd0a397d694763cac7ce
    description: Runtime deprecation.
-->

Type: End-of-Life

`util.puts()` has been removed. Please use [`console.log()`][] instead.

### DEP0028: `util.debug()`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25377
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.3
    commit: 896b2aa7074fc886efd7dd0a397d694763cac7ce
    description: Runtime deprecation.
-->

Type: End-of-Life

`util.debug()` has been removed. Please use [`console.error()`][] instead.

### DEP0029: `util.error()`

<!-- YAML
changes:
  - version: v12.0.0
    pr-url: https://github.com/nodejs/node/pull/25377
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.3
    commit: 896b2aa7074fc886efd7dd0a397d694763cac7ce
    description: Runtime deprecation.
-->

Type: End-of-Life

`util.error()` has been removed. Please use [`console.error()`][] instead.

### DEP0030: `SlowBuffer`

<!-- YAML
changes:
  - version: REPLACEME
    pr-url: https://github.com/nodejs/node/pull/58008
    description: End-of-Life.
  - version: REPLACEME
    pr-url: https://github.com/nodejs/node/pull/55175
    description: Runtime deprecation.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/5833
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The `SlowBuffer` class has been removed. Please use
[`Buffer.allocUnsafeSlow(size)`][] instead.

### DEP0031: `ecdh.setPublicKey()`

<!-- YAML
changes:
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v5.2.0
    pr-url: https://github.com/nodejs/node/pull/3511
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`ecdh.setPublicKey()`][] method is now deprecated as its inclusion in the
API is not useful.

### DEP0032: `node:domain` module

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v1.4.2
    pr-url: https://github.com/nodejs/node/pull/943
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`domain`][] module is deprecated and should not be used.

### DEP0033: `EventEmitter.listenerCount()`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v3.2.0
    pr-url: https://github.com/nodejs/node/pull/2349
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`events.listenerCount(emitter, eventName)`][] API is
deprecated. Please use [`emitter.listenerCount(eventName)`][] instead.

### DEP0034: `fs.exists(path, callback)`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v1.0.0
    pr-url: https://github.com/nodejs/node/pull/166
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`fs.exists(path, callback)`][] API is deprecated. Please use
[`fs.stat()`][] or [`fs.access()`][] instead.

### DEP0035: `fs.lchmod(path, mode, callback)`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.4.7
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`fs.lchmod(path, mode, callback)`][] API is deprecated.

### DEP0036: `fs.lchmodSync(path, mode)`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.4.7
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`fs.lchmodSync(path, mode)`][] API is deprecated.

### DEP0037: `fs.lchown(path, uid, gid, callback)`

<!-- YAML
changes:
  - version: v10.6.0
    pr-url: https://github.com/nodejs/node/pull/21498
    description: Deprecation revoked.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.4.7
    description: Documentation-only deprecation.
-->

Type: Deprecation revoked

The [`fs.lchown(path, uid, gid, callback)`][] API was deprecated. The
deprecation was revoked because the requisite supporting APIs were added in
libuv.

### DEP0038: `fs.lchownSync(path, uid, gid)`

<!-- YAML
changes:
  - version: v10.6.0
    pr-url: https://github.com/nodejs/node/pull/21498
    description: Deprecation revoked.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.4.7
    description: Documentation-only deprecation.
-->

Type: Deprecation revoked

The [`fs.lchownSync(path, uid, gid)`][] API was deprecated. The deprecation was
revoked because the requisite supporting APIs were added in libuv.

### DEP0039: `require.extensions`

<!-- YAML
changes:
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.10.6
    commit: 7bd8a5a2a60b75266f89f9a32877d55294a3881c
    description: Documentation-only deprecation.
-->

Type: Documentation-only

The [`require.extensions`][] property is deprecated.

### DEP0040: `node:punycode` module

<!-- YAML
changes:
  - version: v21.0.0
    pr-url: https://github.com/nodejs/node/pull/47202
    description: Runtime deprecation.
  - version: v16.6.0
    pr-url: https://github.com/nodejs/node/pull/38444
    description: Added support for `--pending-deprecation`.
  - version: v7.0.0
    pr-url: https://github.com/nodejs/node/pull/7941
    description: Documentation-only deprecation.
-->

Type: Runtime

The [`punycode`][] module is deprecated. Please use a userland alternative
instead.

### DEP0041: `NODE_REPL_HISTORY_FILE` environment variable

<!-- YAML
changes:
  - version: v10.0.0
    pr-url: https://github.com/nodejs/node/pull/13876
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v3.0.0
    pr-url: https://github.com/nodejs/node/pull/2224
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The `NODE_REPL_HISTORY_FILE` environment variable was removed. Please use
`NODE_REPL_HISTORY` instead.

### DEP0042: `tls.CryptoStream`

<!-- YAML
changes:
  - version: v10.0.0
    pr-url: https://github.com/nodejs/node/pull/17882
    description: End-of-Life.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v0.11.3
    commit: af80e7bc6e6f33c582eb1f7d37c7f5bbe9f910f7
    description: Documentation-only deprecation.
-->

Type: End-of-Life

The `tls.CryptoStream` class was removed. Please use
[`tls.TLSSocket`][] instead.

### DEP0043: `tls.SecurePair`

<!-- YAML
changes:
  - version: REPLACEME
    pr-url: https://github.com/nodejs/node/pull/57361
    description: End-of-Life.
  - version: v8.0.0
    pr-url: https://github.com/nodejs/node/pull/11349
    description: Runtime deprecation.
  - version: v6.12.0
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version: v6.0.0
    pr-url: https://github.com/nodejs/node/pull/6063
    description: Documentation-only deprecation.
  - version: v0.11.15
    pr-url:
      - https://github.com/nodejs/node-v0.x-archive/pull/8695
      - https://github.com/nodejs/node-v0.x-archive/pull/8700
    description: Deprecation revoked.
  - version: v0.11.3
    commit: af80e7bc6e6f33c582eb1f7d37c7f5bbe9f910f7
    description: Runtime deprecation.
-->

Type: End-of-Life

The `tls.SecurePair` class is deprecated. Please use
[`tls.TLSSocket`][] instead.

### DEP0044: `util.isArray()`

<!-- YAML
changes:
  - version: v22.0.0
    pr-url: https://github.com/nodejs/node/pull/50488
    description: Runtime deprecation.
  - version:
    - v6.12.0
    - v4.8.6
    pr-url: https://github.com/nodejs/node/pull/10116
    description: A deprecation code has been assigned.
  - version:
    - v4.0.0
    - v3.3.1
    pr-url: https://github.com/nodejs/node/pull/2447
    description: Documentation-only deprecation.
-->

Type: Runtime