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# Deprecated APIs <!--introduced_in=v7.7.0--> <!-- type=misc --> Node.js may deprecate APIs when either: (a) use of the API is considered to be unsafe, (b) an improved alternative API is available, or (c) breaking changes to the API are expected in a future major release. Node.js utilizes three kinds of Deprecations: * Documentation-only * Runtime * 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](#deprecations_list_of_deprecated_apis). A Runtime deprecation will, by default, generate a process warning that will be printed to `stderr` the first time the deprecated API is used. When the `--throw-deprecation` command-line flag is used, a Runtime deprecation will cause an error to be thrown. 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 may 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 <a id="DEP0001"></a> ### DEP0001: http.OutgoingMessage.prototype.flush <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The `OutgoingMessage.prototype.flush()` method is deprecated. Use `OutgoingMessage.prototype.flushHeaders()` instead. <a id="DEP0002"></a> ### 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. <a id="DEP0003"></a> ### DEP0003: \_writableState.buffer <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The `_writableState.buffer` property is deprecated. Use the `_writableState.getBuffer()` method instead. <a id="DEP0004"></a> ### DEP0004: CryptoStream.prototype.readyState <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/17882 description: End-of-Life. - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: 0.4.0 commit: 9c7f89bf56abd37a796fea621ad2e47dd33d2b82 description: Documentation-only deprecation. --> Type: End-of-Life The `CryptoStream.prototype.readyState` property was removed. <a id="DEP0005"></a> ### 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: Runtime (supports [`--pending-deprecation`][]) The `Buffer()` function and `new Buffer()` constructor are deprecated due to API usability issues that can potentially lead to accidental security issues. As an alternative, use of the following methods of constructing `Buffer` objects is strongly recommended: * [`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`. As of v10.0.0, a deprecation warning is printed at runtime when `--pending-deprecation` is used or when the calling code is outside `node_modules` in order to better target developers, rather than users. <a id="DEP0006"></a> ### DEP0006: child\_process options.customFds <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: v0.11.14 description: Runtime deprecation. - version: v0.5.11 description: Documentation-only deprecation. --> Type: Runtime 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. <a id="DEP0007"></a> ### 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. <a id="DEP0008"></a> ### DEP0008: require('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 `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('fs').constants` and `require('os').constants`. <a id="DEP0009"></a> ### DEP0009: crypto.pbkdf2 without digest <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/11305 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/4047 description: Runtime deprecation. --> 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 an undefined `digest` will throw a `TypeError`. <a id="DEP0010"></a> ### DEP0010: crypto.createCredentials <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`crypto.createCredentials()`][] API is deprecated. Please use [`tls.createSecureContext()`][] instead. <a id="DEP0011"></a> ### DEP0011: crypto.Credentials <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The `crypto.Credentials` class is deprecated. Please use [`tls.SecureContext`][] instead. <a id="DEP0012"></a> ### DEP0012: Domain.dispose <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/15412 description: End-of-Life. - version: - v4.8.6 - v6.12.0 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. <a id="DEP0013"></a> ### 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>.) <a id="DEP0014"></a> ### 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: v6.0.0 pr-url: https://github.com/nodejs/node/pull/4525 description: Runtime deprecation. - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - 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. <a id="DEP0015"></a> ### 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: v6.0.0 pr-url: https://github.com/nodejs/node/pull/4525 description: Runtime deprecation. - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - 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. <a id="DEP0016"></a> ### DEP0016: GLOBAL/root <!-- YAML changes: - 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: Runtime The `GLOBAL` and `root` aliases for the `global` property are deprecated and should no longer be used. <a id="DEP0017"></a> ### 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). <a id="DEP0018"></a> ### DEP0018: Unhandled promise rejections <!-- YAML changes: - version: v7.0.0 pr-url: https://github.com/nodejs/node/pull/8217 description: Runtime deprecation. --> Type: Runtime Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code. <a id="DEP0019"></a> ### DEP0019: require('.') resolved outside directory <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime In certain cases, `require('.')` may resolve outside the package directory. This behavior is deprecated and will be removed in a future major Node.js release. <a id="DEP0020"></a> ### DEP0020: Server.connections <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`Server.connections`][] property is deprecated. Please use the [`Server.getConnections()`][] method instead. <a id="DEP0021"></a> ### DEP0021: Server.listenFD <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The `Server.listenFD()` method is deprecated. Please use [`Server.listen({fd: <number>})`][] instead. <a id="DEP0022"></a> ### DEP0022: os.tmpDir() <!-- YAML changes: - version: v7.0.0 pr-url: https://github.com/nodejs/node/pull/6739 description: Runtime deprecation. --> Type: Runtime The `os.tmpDir()` API is deprecated. Please use [`os.tmpdir()`][] instead. <a id="DEP0023"></a> ### DEP0023: os.getNetworkInterfaces() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The `os.getNetworkInterfaces()` method is deprecated. Please use the [`os.networkInterfaces`][] property instead. <a id="DEP0024"></a> ### 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. <a id="DEP0025"></a> ### DEP0025: require('sys') <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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 `sys` module is deprecated. Please use the [`util`][] module instead. <a id="DEP0026"></a> ### DEP0026: util.print() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`util.print()`][] API is deprecated. Please use [`console.log()`][] instead. <a id="DEP0027"></a> ### DEP0027: util.puts() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`util.puts()`][] API is deprecated. Please use [`console.log()`][] instead. <a id="DEP0028"></a> ### DEP0028: util.debug() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`util.debug()`][] API is deprecated. Please use [`console.error()`][] instead. <a id="DEP0029"></a> ### DEP0029: util.error() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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: Runtime The [`util.error()`][] API is deprecated. Please use [`console.error()`][] instead. <a id="DEP0030"></a> ### DEP0030: SlowBuffer <!-- YAML changes: - 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: Documentation-only The [`SlowBuffer`][] class is deprecated. Please use [`Buffer.allocUnsafeSlow(size)`][] instead. <a id="DEP0031"></a> ### 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. <a id="DEP0032"></a> ### DEP0032: domain module <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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. <a id="DEP0033"></a> ### DEP0033: EventEmitter.listenerCount() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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 [`EventEmitter.listenerCount(emitter, eventName)`][] API is deprecated. Please use [`emitter.listenerCount(eventName)`][] instead. <a id="DEP0034"></a> ### DEP0034: fs.exists(path, callback) <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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/iojs/io.js/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. <a id="DEP0035"></a> ### DEP0035: fs.lchmod(path, mode, callback) <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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. <a id="DEP0036"></a> ### DEP0036: fs.lchmodSync(path, mode) <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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. <a id="DEP0037"></a> ### 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: - v4.8.6 - v6.12.0 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 is deprecated. <a id="DEP0038"></a> ### 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: - v4.8.6 - v6.12.0 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 is deprecated. <a id="DEP0039"></a> ### DEP0039: require.extensions <!-- YAML changes: - version: - v4.8.6 - v6.12.0 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. <a id="DEP0040"></a> ### DEP0040: punycode module <!-- YAML changes: - version: v7.0.0 pr-url: https://github.com/nodejs/node/pull/7941 description: Documentation-only deprecation. --> Type: Documentation-only The [`punycode`][] module is deprecated. Please use a userland alternative instead. <a id="DEP0041"></a> ### 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: - v4.8.6 - v6.12.0 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. <a id="DEP0042"></a> ### DEP0042: tls.CryptoStream <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/17882 description: End-of-Life. - version: - v4.8.6 - v6.12.0 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. <a id="DEP0043"></a> ### DEP0043: tls.SecurePair <!-- YAML changes: - 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: Documentation-only The [`tls.SecurePair`][] class is deprecated. Please use [`tls.TLSSocket`][] instead. <a id="DEP0044"></a> ### DEP0044: util.isArray() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isArray()`][] API is deprecated. Please use `Array.isArray()` instead. <a id="DEP0045"></a> ### DEP0045: util.isBoolean() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isBoolean()`][] API is deprecated. <a id="DEP0046"></a> ### DEP0046: util.isBuffer() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isBuffer()`][] API is deprecated. Please use [`Buffer.isBuffer()`][] instead. <a id="DEP0047"></a> ### DEP0047: util.isDate() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isDate()`][] API is deprecated. <a id="DEP0048"></a> ### DEP0048: util.isError() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isError()`][] API is deprecated. <a id="DEP0049"></a> ### DEP0049: util.isFunction() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isFunction()`][] API is deprecated. <a id="DEP0050"></a> ### DEP0050: util.isNull() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isNull()`][] API is deprecated. <a id="DEP0051"></a> ### DEP0051: util.isNullOrUndefined() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isNullOrUndefined()`][] API is deprecated. <a id="DEP0052"></a> ### DEP0052: util.isNumber() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isNumber()`][] API is deprecated. <a id="DEP0053"></a> ### DEP0053 util.isObject() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isObject()`][] API is deprecated. <a id="DEP0054"></a> ### DEP0054: util.isPrimitive() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isPrimitive()`][] API is deprecated. <a id="DEP0055"></a> ### DEP0055: util.isRegExp() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isRegExp()`][] API is deprecated. <a id="DEP0056"></a> ### DEP0056: util.isString() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isString()`][] API is deprecated. <a id="DEP0057"></a> ### DEP0057: util.isSymbol() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isSymbol()`][] API is deprecated. <a id="DEP0058"></a> ### DEP0058: util.isUndefined() <!-- YAML changes: - version: - v4.8.6 - v6.12.0 pr-url: https://github.com/nodejs/node/pull/10116 description: A deprecation code has been assigned. - version: - v3.3.1 - v4.0.0 pr-url: https://github.com/nodejs/node/pull/2447 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.isUndefined()`][] API is deprecated. <a id="DEP0059"></a> ### DEP0059: util.log() <!-- YAML changes: - 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/6161 description: Documentation-only deprecation. --> Type: Documentation-only The [`util.log()`][] API is deprecated. <a id="DEP0060"></a> ### DEP0060: util.\_extend() <!-- YAML changes: - 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/4903 description: Documentation-only deprecation. --> Type: Documentation-only The [`util._extend()`][] API is deprecated. <a id="DEP0061"></a> ### DEP0061: fs.SyncWriteStream <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/10467 description: Runtime deprecation. - version: v7.0.0 pr-url: https://github.com/nodejs/node/pull/6749 description: Documentation-only deprecation. --> Type: Runtime The `fs.SyncWriteStream` class was never intended to be a publicly accessible API. No alternative API is available. Please use a userland alternative. <a id="DEP0062"></a> ### DEP0062: node --debug <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/10970 description: Runtime deprecation. --> Type: Runtime `--debug` activates the legacy V8 debugger interface, which was removed as of V8 5.8. It is replaced by Inspector which is activated with `--inspect` instead. <a id="DEP0063"></a> ### DEP0063: ServerResponse.prototype.writeHeader() <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/11355 description: Documentation-only deprecation. --> Type: Documentation-only The `http` module `ServerResponse.prototype.writeHeader()` API is deprecated. Please use `ServerResponse.prototype.writeHead()` instead. The `ServerResponse.prototype.writeHeader()` method was never documented as an officially supported API. <a id="DEP0064"></a> ### DEP0064: tls.createSecurePair() <!-- YAML changes: - 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: Runtime The `tls.createSecurePair()` API was deprecated in documentation in Node.js 0.11.3. Users should use `tls.Socket` instead. <a id="DEP0065"></a> ### DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19187 description: End-of-Life. - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/11599 description: Documentation-only deprecation. --> Type: End-of-Life The `repl` module's `REPL_MODE_MAGIC` constant, used for `replMode` option, has been removed. Its behavior has been functionally identical to that of `REPL_MODE_SLOPPY` since Node.js 6.0.0, when V8 5.0 was imported. Please use `REPL_MODE_SLOPPY` instead. The `NODE_REPL_MODE` environment variable is used to set the underlying `replMode` of an interactive `node` session. Its value, `magic`, is also removed. Please use `sloppy` instead. <a id="DEP0066"></a> ### DEP0066: outgoingMessage.\_headers, outgoingMessage.\_headerNames <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/10941 description: Documentation-only deprecation. --> Type: Documentation-only The `http` module `outgoingMessage._headers` and `outgoingMessage._headerNames` properties are deprecated. Use one of the public methods (e.g. `outgoingMessage.getHeader()`, `outgoingMessage.getHeaders()`, `outgoingMessage.getHeaderNames()`, `outgoingMessage.hasHeader()`, `outgoingMessage.removeHeader()`, `outgoingMessage.setHeader()`) for working with outgoing headers. The `outgoingMessage._headers` and `outgoingMessage._headerNames` properties were never documented as officially supported properties. <a id="DEP0067"></a> ### DEP0067: OutgoingMessage.prototype.\_renderHeaders <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/10941 description: Documentation-only deprecation. --> Type: Documentation-only The `http` module `OutgoingMessage.prototype._renderHeaders()` API is deprecated. The `OutgoingMessage.prototype._renderHeaders` property was never documented as an officially supported API. <a id="DEP0068"></a> ### DEP0068: node debug <!-- YAML changes: - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/11441 description: Runtime deprecation. --> Type: Runtime `node debug` corresponds to the legacy CLI debugger which has been replaced with a V8-inspector based CLI debugger available through `node inspect`. <a id="DEP0069"></a> ### DEP0069: vm.runInDebugContext(string) <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/13295 description: End-of-Life. - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/12815 description: Runtime deprecation. - version: v8.0.0 pr-url: https://github.com/nodejs/node/pull/12243 description: Documentation-only deprecation. --> Type: End-of-Life DebugContext has been removed in V8 and is not available in Node.js 10+. DebugContext was an experimental API. <a id="DEP0070"></a> ### DEP0070: async_hooks.currentId() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14414 description: End-of-Life. - version: v8.2.0 pr-url: https://github.com/nodejs/node/pull/13490 description: Runtime deprecation. --> Type: End-of-Life `async_hooks.currentId()` was renamed to `async_hooks.executionAsyncId()` for clarity. This change was made while `async_hooks` was an experimental API. <a id="DEP0071"></a> ### DEP0071: async_hooks.triggerId() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14414 description: End-of-Life. - version: v8.2.0 pr-url: https://github.com/nodejs/node/pull/13490 description: Runtime deprecation. --> Type: End-of-Life `async_hooks.triggerId()` was renamed to `async_hooks.triggerAsyncId()` for clarity. This change was made while `async_hooks` was an experimental API. <a id="DEP0072"></a> ### DEP0072: async_hooks.AsyncResource.triggerId() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14414 description: End-of-Life. - version: v8.2.0 pr-url: https://github.com/nodejs/node/pull/13490 description: Runtime deprecation. --> Type: End-of-Life `async_hooks.AsyncResource.triggerId()` was renamed to `async_hooks.AsyncResource.triggerAsyncId()` for clarity. This change was made while `async_hooks` was an experimental API. <a id="DEP0073"></a> ### DEP0073: Several internal properties of net.Server <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/17141 description: End-of-Life. - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14449 description: Runtime deprecation. --> Type: End-of-Life Accessing several internal, undocumented properties of `net.Server` instances with inappropriate names is deprecated. As the original API was undocumented and not generally useful for non-internal code, no replacement API is provided. <a id="DEP0074"></a> ### DEP0074: REPLServer.bufferedCommand <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/13687 description: Runtime deprecation. --> Type: Runtime The `REPLServer.bufferedCommand` property was deprecated in favor of [`REPLServer.clearBufferedCommand()`][]. <a id="DEP0075"></a> ### DEP0075: REPLServer.parseREPLKeyword() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14223 description: Runtime deprecation. --> Type: Runtime `REPLServer.parseREPLKeyword()` was removed from userland visibility. <a id="DEP0076"></a> ### DEP0076: tls.parseCertString() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14249 description: Runtime deprecation. - version: v8.6.0 pr-url: https://github.com/nodejs/node/pull/14245 description: Documentation-only deprecation. --> Type: Runtime `tls.parseCertString()` is a trivial parsing helper that was made public by mistake. This function can usually be replaced with: ```js const querystring = require('querystring'); querystring.parse(str, '\n', '='); ``` This function is not completely equivalent to `querystring.parse()`. One difference is that `querystring.parse()` does url decoding: ```sh > querystring.parse('%E5%A5%BD=1', '\n', '='); { '好': '1' } > tls.parseCertString('%E5%A5%BD=1'); { '%E5%A5%BD': '1' } ``` <a id="DEP0077"></a> ### DEP0077: Module.\_debug() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/13948 description: Runtime deprecation. --> Type: Runtime `Module._debug()` is deprecated. The `Module._debug()` function was never documented as an officially supported API. <a id="DEP0078"></a> ### DEP0078: REPLServer.turnOffEditorMode() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/15136 description: Runtime deprecation. --> Type: Runtime `REPLServer.turnOffEditorMode()` was removed from userland visibility. <a id="DEP0079"></a> ### DEP0079: Custom inspection function on Objects via .inspect() <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/16393 description: Runtime deprecation. - version: v8.7.0 pr-url: https://github.com/nodejs/node/pull/15631 description: Documentation-only deprecation. --> Type: Runtime Using a property named `inspect` on an object to specify a custom inspection function for [`util.inspect()`][] is deprecated. Use [`util.inspect.custom`][] instead. For backward compatibility with Node.js prior to version 6.4.0, both may be specified. <a id="DEP0080"></a> ### DEP0080: path.\_makeLong() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/14956 description: Documentation-only deprecation. --> Type: Documentation-only The internal `path._makeLong()` was not intended for public use. However, userland modules have found it useful. The internal API is deprecated and replaced with an identical, public `path.toNamespacedPath()` method. <a id="DEP0081"></a> ### DEP0081: fs.truncate() using a file descriptor <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/15990 description: Runtime deprecation. --> Type: Runtime `fs.truncate()` `fs.truncateSync()` usage with a file descriptor is deprecated. Please use `fs.ftruncate()` or `fs.ftruncateSync()` to work with file descriptors. <a id="DEP0082"></a> ### DEP0082: REPLServer.prototype.memory() <!-- YAML changes: - version: v9.0.0 pr-url: https://github.com/nodejs/node/pull/16242 description: Runtime deprecation. --> Type: Runtime `REPLServer.prototype.memory()` is only necessary for the internal mechanics of the `REPLServer` itself. Do not use this function. <a id="DEP0083"></a> ### DEP0083: Disabling ECDH by setting ecdhCurve to false <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19794 description: End-of-Life. - version: v9.2.0 pr-url: https://github.com/nodejs/node/pull/16130 description: Runtime deprecation. --> Type: End-of-Life. The `ecdhCurve` option to `tls.createSecureContext()` and `tls.TLSSocket` could be set to `false` to disable ECDH entirely on the server only. This mode was deprecated in preparation for migrating to OpenSSL 1.1.0 and consistency with the client and is now unsupported. Use the `ciphers` parameter instead. <a id="DEP0084"></a> ### DEP0084: requiring bundled internal dependencies <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/16392 description: Runtime deprecation. --> Type: Runtime Since Node.js versions 4.4.0 and 5.2.0, several modules only intended for internal usage are mistakenly exposed to user code through `require()`. These modules are: - `v8/tools/codemap` - `v8/tools/consarray` - `v8/tools/csvparser` - `v8/tools/logreader` - `v8/tools/profile_view` - `v8/tools/profile` - `v8/tools/SourceMap` - `v8/tools/splaytree` - `v8/tools/tickprocessor-driver` - `v8/tools/tickprocessor` - `node-inspect/lib/_inspect` (from 7.6.0) - `node-inspect/lib/internal/inspect_client` (from 7.6.0) - `node-inspect/lib/internal/inspect_repl` (from 7.6.0) The `v8/*` modules do not have any exports, and if not imported in a specific order would in fact throw errors. As such there are virtually no legitimate use cases for importing them through `require()`. On the other hand, `node-inspect` may be installed locally through a package manager, as it is published on the npm registry under the same name. No source code modification is necessary if that is done. <a id="DEP0085"></a> ### DEP0085: AsyncHooks Sensitive API <!-- YAML changes: - version: 10.0.0 pr-url: https://github.com/nodejs/node/pull/17147 description: End-of-Life. - version: - v8.10.0 - v9.4.0 pr-url: https://github.com/nodejs/node/pull/16972 description: Runtime deprecation. --> Type: End-of-Life The AsyncHooks Sensitive API was never documented and had various minor issues. (See <https://github.com/nodejs/node/issues/15572>.) Use the `AsyncResource` API instead. <a id="DEP0086"></a> ### DEP0086: Remove runInAsyncIdScope <!-- YAML changes: - version: 10.0.0 pr-url: https://github.com/nodejs/node/pull/17147 description: End-of-Life. - version: - v8.10.0 - v9.4.0 pr-url: https://github.com/nodejs/node/pull/16972 description: Runtime deprecation. --> Type: End-of-Life `runInAsyncIdScope` doesn't emit the `'before'` or `'after'` event and can thus cause a lot of issues. See <https://github.com/nodejs/node/issues/14328> for more details. <a id="DEP0089"></a> ### DEP0089: require('assert') <!-- YAML changes: - version: - v9.9.0 - v10.0.0 pr-url: https://github.com/nodejs/node/pull/17002 description: Documentation-only deprecation. --> Type: Documentation-only Importing assert directly is not recommended as the exposed functions will use loose equality checks. Use `require('assert').strict` instead. The API is the same as the legacy assert but it will always use strict equality checks. <a id="DEP0090"></a> ### DEP0090: Invalid GCM authentication tag lengths <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18017 description: Runtime deprecation. --> Type: Runtime Node.js supports all GCM authentication tag lengths which are accepted by OpenSSL when calling [`decipher.setAuthTag()`][]. This behavior will change in a future version at which point only authentication tag lengths of 128, 120, 112, 104, 96, 64, and 32 bits will be allowed. Authentication tags whose length is not included in this list will be considered invalid in compliance with [NIST SP 800-38D][]. <a id="DEP0091"></a> ### DEP0091: crypto.DEFAULT_ENCODING <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18333 description: Runtime deprecation. --> Type: Runtime The [`crypto.DEFAULT_ENCODING`][] property is deprecated. <a id="DEP0092"></a> ### DEP0092: Top-level `this` bound to `module.exports` <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/16878 description: Documentation-only deprecation. --> Type: Documentation-only Assigning properties to the top-level `this` as an alternative to `module.exports` is deprecated. Developers should use `exports` or `module.exports` instead. <a id="DEP0093"></a> ### DEP0093: crypto.fips is deprecated and replaced. <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18335 description: Documentation-only deprecation. --> Type: Documentation-only The [`crypto.fips`][] property is deprecated. Please use `crypto.setFips()` and `crypto.getFips()` instead. <a id="DEP0094"></a> ### DEP0094: Using `assert.fail()` with more than one argument. <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18418 description: Runtime deprecation. --> Type: Runtime Using `assert.fail()` with more than one argument is deprecated. Use `assert.fail()` with only one argument or use a different `assert` module method. <a id="DEP0095"></a> ### DEP0095: timers.enroll() <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18066 description: Runtime deprecation. --> Type: Runtime `timers.enroll()` is deprecated. Please use the publicly documented [`setTimeout()`][] or [`setInterval()`][] instead. <a id="DEP0096"></a> ### DEP0096: timers.unenroll() <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18066 description: Runtime deprecation. --> Type: Runtime `timers.unenroll()` is deprecated. Please use the publicly documented [`clearTimeout()`][] or [`clearInterval()`][] instead. <a id="DEP0097"></a> ### DEP0097: MakeCallback with domain property <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/17417 description: Runtime deprecation. --> Type: Runtime Users of `MakeCallback` that add the `domain` property to carry context, should start using the `async_context` variant of `MakeCallback` or `CallbackScope`, or the high-level `AsyncResource` class. <a id="DEP0098"></a> ### DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs <!-- YAML changes: - version: - v8.12.0 - v9.6.0 - v10.0.0 pr-url: https://github.com/nodejs/node/pull/18632 description: Runtime deprecation. --> Type: Runtime The embedded API provided by AsyncHooks exposes `.emitBefore()` and `.emitAfter()` methods which are very easy to use incorrectly which can lead to unrecoverable errors. Use [`asyncResource.runInAsyncScope()`][] API instead which provides a much safer, and more convenient, alternative. See <https://github.com/nodejs/node/pull/18513> for more details. <a id="DEP0099"></a> ### DEP0099: async context-unaware node::MakeCallback C++ APIs <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18632 description: Compile-time deprecation. --> Type: Compile-time Certain versions of `node::MakeCallback` APIs available to native modules are deprecated. Please use the versions of the API that accept an `async_context` parameter. <a id="DEP0100"></a> ### DEP0100: process.assert() <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18666 description: Runtime deprecation. - version: v0.3.7 description: Documentation-only deprecation. --> Type: Runtime `process.assert()` is deprecated. Please use the [`assert`][] module instead. This was never a documented feature. <a id="DEP0101"></a> ### DEP0101: --with-lttng <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18982 description: End-of-Life. --> Type: End-of-Life The `--with-lttng` compile-time option has been removed. <a id="DEP0102"></a> ### DEP0102: Using `noAssert` in Buffer#(read|write) operations. <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18395 description: End-of-Life. --> Type: End-of-Life Using the `noAssert` argument has no functionality anymore. All input is going to be verified, no matter if it is set to true or not. Skipping the verification could lead to hard to find errors and crashes. <a id="DEP0103"></a> ### DEP0103: process.binding('util').is[...] typechecks <!-- YAML changes: - version: v10.9.0 pr-url: https://github.com/nodejs/node/pull/22004 description: Superseded by [DEP0111](#DEP0111). - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18415 description: Documentation-only deprecation. --> Type: Documentation-only (supports [`--pending-deprecation`][]) Using `process.binding()` in general should be avoided. The type checking methods in particular can be replaced by using [`util.types`][]. This deprecation has been superseded by the deprecation of the `process.binding()` API ([DEP0111](#DEP0111)). <a id="DEP0104"></a> ### DEP0104: process.env string coercion <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/18990 description: Documentation-only deprecation. --> Type: Documentation-only (supports [`--pending-deprecation`][]) When assigning a non-string property to [`process.env`][], the assigned value is implicitly converted to a string. This behavior is deprecated if the assigned value is not a string, boolean, or number. In the future, such assignment may result in a thrown error. Please convert the property to a string before assigning it to `process.env`. <a id="DEP0105"></a> ### DEP0105: decipher.finaltol <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19353 description: Runtime deprecation. --> Type: Runtime `decipher.finaltol()` has never been documented and is currently an alias for [`decipher.final()`][]. In the future, this API will likely be removed, and it is recommended to use [`decipher.final()`][] instead. <a id="DEP0106"></a> ### DEP0106: crypto.createCipher and crypto.createDecipher <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19343 description: Documentation-only deprecation. --> Type: Documentation-only Using [`crypto.createCipher()`][] and [`crypto.createDecipher()`][] should be avoided as they use a weak key derivation function (MD5 with no salt) and static initialization vectors. It is recommended to derive a key using [`crypto.pbkdf2()`][] or [`crypto.scrypt()`][] and to use [`crypto.createCipheriv()`][] and [`crypto.createDecipheriv()`][] to obtain the [`Cipher`][] and [`Decipher`][] objects respectively. <a id="DEP0107"></a> ### DEP0107: tls.convertNPNProtocols() <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19403 description: Runtime deprecation. --> Type: Runtime This was an undocumented helper function not intended for use outside Node.js core and obsoleted by the removal of NPN (Next Protocol Negotiation) support. <a id="DEP0108"></a> ### DEP0108: zlib.bytesRead <!-- YAML changes: - version: v10.0.0 pr-url: https://github.com/nodejs/node/pull/19414 description: Documentation-only deprecation. --> Type: Documentation-only Deprecated alias for [`zlib.bytesWritten`][]. This original name was chosen because it also made sense to interpret the value as the number of bytes read by the engine, but is inconsistent with other streams in Node.js that expose values under these names. <a id="DEP0110"></a> ### DEP0110: vm.Script cached data <!-- YAML changes: - version: v10.6.0 pr-url: https://github.com/nodejs/node/pull/20300 description: Documentation-only deprecation. --> Type: Documentation-only The `produceCachedData` option is deprecated. Use [`script.createCachedData()`][] instead. <a id="DEP0111"></a> ### DEP0111: process.binding() <!-- YAML changes: - version: v10.9.0 pr-url: https://github.com/nodejs/node/pull/22004 description: Documentation-only deprecation. --> Type: Documentation-only `process.binding()` is for use by Node.js internal code only. 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crypto.html#crypto_crypto_pbkdf2_password_salt_iterations_keylen_digest_callback [`crypto.scrypt()`]: crypto.html#crypto_crypto_scrypt_password_salt_keylen_options_callback [`decipher.final()`]: crypto.html#crypto_decipher_final_outputencoding [`decipher.setAuthTag()`]: crypto.html#crypto_decipher_setauthtag_buffer [`domain`]: domain.html [`ecdh.setPublicKey()`]: crypto.html#crypto_ecdh_setpublickey_publickey_encoding [`emitter.listenerCount(eventName)`]: events.html#events_emitter_listenercount_eventname [`fs.access()`]: fs.html#fs_fs_access_path_mode_callback [`fs.exists(path, callback)`]: fs.html#fs_fs_exists_path_callback [`fs.lchmod(path, mode, callback)`]: fs.html#fs_fs_lchmod_path_mode_callback [`fs.lchmodSync(path, mode)`]: fs.html#fs_fs_lchmodsync_path_mode [`fs.lchown(path, uid, gid, callback)`]: fs.html#fs_fs_lchown_path_uid_gid_callback [`fs.lchownSync(path, uid, gid)`]: fs.html#fs_fs_lchownsync_path_uid_gid [`fs.read()`]: fs.html#fs_fs_read_fd_buffer_offset_length_position_callback [`fs.readSync()`]: fs.html#fs_fs_readsync_fd_buffer_offset_length_position [`fs.stat()`]: fs.html#fs_fs_stat_path_options_callback [`os.networkInterfaces`]: os.html#os_os_networkinterfaces [`os.tmpdir()`]: os.html#os_os_tmpdir [`process.env`]: process.html#process_process_env [`punycode`]: punycode.html [`require.extensions`]: modules.html#modules_require_extensions [`script.createCachedData()`]: vm.html#vm_script_createcacheddata [`setInterval()`]: timers.html#timers_setinterval_callback_delay_args [`setTimeout()`]: timers.html#timers_settimeout_callback_delay_args [`tls.CryptoStream`]: tls.html#tls_class_cryptostream [`tls.SecureContext`]: tls.html#tls_tls_createsecurecontext_options [`tls.SecurePair`]: tls.html#tls_class_securepair [`tls.TLSSocket`]: tls.html#tls_class_tls_tlssocket [`tls.createSecureContext()`]: tls.html#tls_tls_createsecurecontext_options [`util._extend()`]: util.html#util_util_extend_target_source [`util.debug()`]: util.html#util_util_debug_string [`util.error()`]: util.html#util_util_error_strings [`util.inspect()`]: util.html#util_util_inspect_object_options [`util.inspect.custom`]: util.html#util_util_inspect_custom [`util.isArray()`]: util.html#util_util_isarray_object [`util.isBoolean()`]: util.html#util_util_isboolean_object [`util.isBuffer()`]: util.html#util_util_isbuffer_object [`util.isDate()`]: util.html#util_util_isdate_object [`util.isError()`]: util.html#util_util_iserror_object [`util.isFunction()`]: util.html#util_util_isfunction_object [`util.isNull()`]: util.html#util_util_isnull_object [`util.isNullOrUndefined()`]: util.html#util_util_isnullorundefined_object [`util.isNumber()`]: util.html#util_util_isnumber_object [`util.isObject()`]: util.html#util_util_isobject_object [`util.isPrimitive()`]: util.html#util_util_isprimitive_object [`util.isRegExp()`]: util.html#util_util_isregexp_object [`util.isString()`]: util.html#util_util_isstring_object [`util.isSymbol()`]: util.html#util_util_issymbol_object [`util.isUndefined()`]: util.html#util_util_isundefined_object [`util.log()`]: util.html#util_util_log_string [`util.print()`]: util.html#util_util_print_strings [`util.puts()`]: util.html#util_util_puts_strings [`util.types`]: util.html#util_util_types [`util`]: util.html [`worker.exitedAfterDisconnect`]: cluster.html#cluster_worker_exitedafterdisconnect [`zlib.bytesWritten`]: zlib.html#zlib_zlib_byteswritten [NIST SP 800-38D]: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf [alloc]: buffer.html#buffer_class_method_buffer_alloc_size_fill_encoding [alloc_unsafe_size]: buffer.html#buffer_class_method_buffer_allocunsafe_size [from_arraybuffer]: buffer.html#buffer_class_method_buffer_from_arraybuffer_byteoffset_length [from_string_encoding]: buffer.html#buffer_class_method_buffer_from_string_encoding