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# Deprecated APIs <!--introduced_in=v7.7.0--> Node.js may deprecate APIs when either: (a) use of the API is considered to be unsafe, (b) an improved alternative API has been made 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 to identify code that either has been removed or will soon be removed from Node.js. ## Un-deprecation From time-to-time the deprecation of an API may be reversed. Such action may happen in either a semver-minor or semver-major release. 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 Type: Runtime The `OutgoingMessage.prototype.flush()` method is deprecated. Use `OutgoingMessage.prototype.flushHeaders()` instead. <a id="DEP0002"></a> ### DEP0002: require('\_linklist') Type: End-of-Life The `_linklist` module is deprecated. Please use a userland alternative. <a id="DEP0003"></a> ### DEP0003: \_writableState.buffer Type: Runtime The `_writableState.buffer` property is deprecated. Use the `_writableState.getBuffer()` method instead. <a id="DEP0004"></a> ### DEP0004: CryptoStream.prototype.readyState Type: Documentation-only The `CryptoStream.prototype.readyState` property is deprecated and should not be used. <a id="DEP0005"></a> ### DEP0005: Buffer() constructor Type: Documentation-only (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`. <a id="DEP0006"></a> ### DEP0006: child\_process options.customFds 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 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') Type: Documentation-only The `constants` module has been 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 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 Type: Runtime The [`crypto.createCredentials()`][] API is deprecated. Please use [`tls.createSecureContext()`][] instead. <a id="DEP0011"></a> ### DEP0011: crypto.Credentials Type: Runtime The `crypto.Credentials` class is deprecated. Please use [`tls.SecureContext`][] instead. <a id="DEP0012"></a> ### DEP0012: Domain.dispose Type: End-of-Life `Domain.dispose()` is 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 Type: Runtime Calling an asynchronous function without a callback is deprecated. <a id="DEP0014"></a> ### DEP0014: fs.read legacy String interface 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 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 Type: Runtime The `GLOBAL` and `root` aliases for the `global` property have been deprecated and should no longer be used. <a id="DEP0017"></a> ### DEP0017: Intl.v8BreakIterator 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 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 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 Type: Runtime The [`Server.connections`][] property is deprecated. Please use the [`Server.getConnections()`][] method instead. <a id="DEP0021"></a> ### DEP0021: Server.listenFD Type: Runtime The `Server.listenFD()` method is deprecated. Please use [`Server.listen({fd: <number>})`][] instead. <a id="DEP0022"></a> ### DEP0022: os.tmpDir() Type: Runtime The `os.tmpDir()` API is deprecated. Please use [`os.tmpdir()`][] instead. <a id="DEP0023"></a> ### DEP0023: os.getNetworkInterfaces() Type: Runtime The `os.getNetworkInterfaces()` method is deprecated. Please use the [`os.networkInterfaces`][] property instead. <a id="DEP0024"></a> ### DEP0024: REPLServer.prototype.convertToContext() Type: End-of-Life The `REPLServer.prototype.convertToContext()` API is deprecated and should not be used. <a id="DEP0025"></a> ### DEP0025: require('sys') Type: Runtime The `sys` module is deprecated. Please use the [`util`][] module instead. <a id="DEP0026"></a> ### DEP0026: util.print() Type: Runtime The [`util.print()`][] API is deprecated. Please use [`console.log()`][] instead. <a id="DEP0027"></a> ### DEP0027: util.puts() Type: Runtime The [`util.puts()`][] API is deprecated. Please use [`console.log()`][] instead. <a id="DEP0028"></a> ### DEP0028: util.debug() Type: Runtime The [`util.debug()`][] API is deprecated. Please use [`console.error()`][] instead. <a id="DEP0029"></a> ### DEP0029: util.error() Type: Runtime The [`util.error()`][] API is deprecated. Please use [`console.error()`][] instead. <a id="DEP0030"></a> ### DEP0030: SlowBuffer Type: Documentation-only The [`SlowBuffer`][] class has been deprecated. Please use [`Buffer.allocUnsafeSlow(size)`][] instead. <a id="DEP0031"></a> ### DEP0031: ecdh.setPublicKey() 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 Type: Documentation-only The [`domain`][] module is deprecated and should not be used. <a id="DEP0033"></a> ### DEP0033: EventEmitter.listenerCount() Type: Documentation-only The [`EventEmitter.listenerCount(emitter, eventName)`][] API has been deprecated. Please use [`emitter.listenerCount(eventName)`][] instead. <a id="DEP0034"></a> ### DEP0034: fs.exists(path, callback) Type: Documentation-only The [`fs.exists(path, callback)`][] API has been deprecated. Please use [`fs.stat()`][] or [`fs.access()`][] instead. <a id="DEP0035"></a> ### DEP0035: fs.lchmod(path, mode, callback) Type: Documentation-only The [`fs.lchmod(path, mode, callback)`][] API has been deprecated. <a id="DEP0036"></a> ### DEP0036: fs.lchmodSync(path, mode) Type: Documentation-only The [`fs.lchmodSync(path, mode)`][] API has been deprecated. <a id="DEP0037"></a> ### DEP0037: fs.lchown(path, uid, gid, callback) Type: Documentation-only The [`fs.lchown(path, uid, gid, callback)`][] API has been deprecated. <a id="DEP0038"></a> ### DEP0038: fs.lchownSync(path, uid, gid) Type: Documentation-only The [`fs.lchownSync(path, uid, gid)`][] API has been deprecated. <a id="DEP0039"></a> ### DEP0039: require.extensions Type: Documentation-only The [`require.extensions`][] property has been deprecated. <a id="DEP0040"></a> ### DEP0040: punycode module Type: Documentation-only The [`punycode`][] module has been deprecated. Please use a userland alternative instead. <a id="DEP0041"></a> ### DEP0041: NODE\_REPL\_HISTORY\_FILE environment variable Type: Documentation-only The `NODE_REPL_HISTORY_FILE` environment variable has been deprecated. <a id="DEP0042"></a> ### DEP0042: tls.CryptoStream Type: Documentation-only The [`tls.CryptoStream`][] class has been deprecated. Please use [`tls.TLSSocket`][] instead. <a id="DEP0043"></a> ### DEP0043: tls.SecurePair Type: Documentation-only The [`tls.SecurePair`][] class has been deprecated. Please use [`tls.TLSSocket`][] instead. <a id="DEP0044"></a> ### DEP0044: util.isArray() Type: Documentation-only The [`util.isArray()`][] API has been deprecated. Please use `Array.isArray()` instead. <a id="DEP0045"></a> ### DEP0045: util.isBoolean() Type: Documentation-only The [`util.isBoolean()`][] API has been deprecated. <a id="DEP0046"></a> ### DEP0046: util.isBuffer() Type: Documentation-only The [`util.isBuffer()`][] API has been deprecated. Please use [`Buffer.isBuffer()`][] instead. <a id="DEP0047"></a> ### DEP0047: util.isDate() Type: Documentation-only The [`util.isDate()`][] API has been deprecated. <a id="DEP0048"></a> ### DEP0048: util.isError() Type: Documentation-only The [`util.isError()`][] API has been deprecated. <a id="DEP0049"></a> ### DEP0049: util.isFunction() Type: Documentation-only The [`util.isFunction()`][] API has been deprecated. <a id="DEP0050"></a> ### DEP0050: util.isNull() Type: Documentation-only The [`util.isNull()`][] API has been deprecated. <a id="DEP0051"></a> ### DEP0051: util.isNullOrUndefined() Type: Documentation-only The [`util.isNullOrUndefined()`][] API has been deprecated. <a id="DEP0052"></a> ### DEP0052: util.isNumber() Type: Documentation-only The [`util.isNumber()`][] API has been deprecated. <a id="DEP0053"></a> ### DEP0053 util.isObject() Type: Documentation-only The [`util.isObject()`][] API has been deprecated. <a id="DEP0054"></a> ### DEP0054: util.isPrimitive() Type: Documentation-only The [`util.isPrimitive()`][] API has been deprecated. <a id="DEP0055"></a> ### DEP0055: util.isRegExp() Type: Documentation-only The [`util.isRegExp()`][] API has been deprecated. <a id="DEP0056"></a> ### DEP0056: util.isString() Type: Documentation-only The [`util.isString()`][] API has been deprecated. <a id="DEP0057"></a> ### DEP0057: util.isSymbol() Type: Documentation-only The [`util.isSymbol()`][] API has been deprecated. <a id="DEP0058"></a> ### DEP0058: util.isUndefined() Type: Documentation-only The [`util.isUndefined()`][] API has been deprecated. <a id="DEP0059"></a> ### DEP0059: util.log() Type: Documentation-only The [`util.log()`][] API has been deprecated. <a id="DEP0060"></a> ### DEP0060: util.\_extend() Type: Documentation-only The [`util._extend()`][] API has been deprecated. <a id="DEP0061"></a> ### DEP0061: fs.SyncWriteStream 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 Type: Runtime `--debug` activates the legacy V8 debugger interface, which has been 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() Type: Documentation-only The `http` module `ServerResponse.prototype.writeHeader()` API has been 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() 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 Type: Documentation-only The `repl` module's `REPL_MODE_MAGIC` constant, used for `replMode` option, has been deprecated. Its behavior has been functionally identical to that of `REPL_MODE_SLOPPY` since Node.js v6.0.0, 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 default value, `magic`, is similarly deprecated in favor of `sloppy`. <a id="DEP0066"></a> ### DEP0066: outgoingMessage.\_headers, outgoingMessage.\_headerNames Type: Documentation-only The `http` module `outgoingMessage._headers` and `outgoingMessage._headerNames` properties have been deprecated. Please instead 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 Type: Documentation-only The `http` module `OutgoingMessage.prototype._renderHeaders()` API has been deprecated. The `OutgoingMessage.prototype._renderHeaders` property was never documented as an officially supported API. <a id="DEP0068"></a> ### DEP0068: node debug 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) Type: Runtime The DebugContext will be removed in V8 soon and will not be available in Node 10+. DebugContext was an experimental API. <a id="DEP0070"></a> ### DEP0070: async_hooks.currentId() 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() 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() 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 Type: Runtime Accessing several internal, undocumented properties of `net.Server` instances with inappropriate names has been 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 Type: Runtime The `REPLServer.bufferedCommand` property was deprecated in favor of [`REPLServer.clearBufferedCommand()`][]. <a id="DEP0075"></a> ### DEP0075: REPLServer.parseREPLKeyword() Type: Runtime `REPLServer.parseREPLKeyword()` was removed from userland visibility. <a id="DEP0076"></a> ### DEP0076: tls.parseCertString() 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() Type: Runtime `Module._debug()` has been deprecated. The `Module._debug()` function was never documented as an officially supported API. <a id="DEP0078"></a> ### DEP0078: REPLServer.turnOffEditorMode() Type: Runtime `REPLServer.turnOffEditorMode()` was removed from userland visibility. <a id="DEP0079"></a> ### DEP0079: Custom inspection function on Objects via .inspect() Type: Documentation-only 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 backwards compatibility with Node.js prior to version 6.4.0, both may be specified. <a id="DEP0080"></a> ### DEP0080: path.\_makeLong() Type: Documentation-only The internal `path._makeLong()` was not intended for public use. However, userland modules have found it useful. The internal API has been deprecated and replaced with an identical, public `path.toNamespacedPath()` method. <a id="DEP0081"></a> ### DEP0081: fs.truncate() using a file descriptor Type: Runtime `fs.truncate()` `fs.truncateSync()` usage with a file descriptor has been deprecated. Please use `fs.ftruncate()` or `fs.ftruncateSync()` to work with file descriptors. <a id="DEP0082"></a> ### DEP0082: REPLServer.prototype.memory() Type: Runtime `REPLServer.prototype.memory()` is a function only necessary for the internal mechanics of the `REPLServer` itself, and is therefore not necessary in user space. <a id="DEP0083"></a> ### DEP0083: Disabling ECDH by setting ecdhCurve to false Type: Runtime The `ecdhCurve` option to `tls.createSecureContext()` and `tls.TLSSocket` could be set to `false` to disable ECDH entirely on the server only. This mode is deprecated in preparation for migrating to OpenSSL 1.1.0 and consistency with the client. Use the `ciphers` parameter instead. <a id="DEP0085"></a> ### DEP0085: AsyncHooks Sensitive API Type: Runtime The AsyncHooks Sensitive API was never documented and had various of minor issues, see https://github.com/nodejs/node/issues/15572. Use the `AsyncResource` API instead. <a id="DEP0086"></a> ### DEP0086: Remove runInAsyncIdScope Type: Runtime `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') 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="DEP0098"></a> ### DEP0098: AsyncHooks Embedder AsyncResource.emit{Before,After} APIs Type: Runtime The embedded API provided by AsyncHooks exposes emit{Before,After} 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. [`Buffer.allocUnsafeSlow(size)`]: buffer.html#buffer_class_method_buffer_allocunsafeslow_size [`Buffer.from(array)`]: buffer.html#buffer_class_method_buffer_from_array [`Buffer.from(buffer)`]: buffer.html#buffer_class_method_buffer_from_buffer [`Buffer.isBuffer()`]: buffer.html#buffer_class_method_buffer_isbuffer_obj [`EventEmitter.listenerCount(emitter, eventName)`]: events.html#events_eventemitter_listenercount_emitter_eventname [`Server.connections`]: net.html#net_server_connections [`Server.getConnections()`]: net.html#net_server_getconnections_callback [`Server.listen({fd: <number>})`]: net.html#net_server_listen_handle_backlog_callback [`SlowBuffer`]: buffer.html#buffer_class_slowbuffer [`asyncResource.runInAsyncScope()`]: async_hooks.html#async_hooks_asyncresource_runinasyncscope_fn_thisarg_args [`child_process`]: child_process.html [`console.error()`]: console.html#console_console_error_data_args [`console.log()`]: console.html#console_console_log_data_args [`crypto.createCredentials()`]: crypto.html#crypto_crypto_createcredentials_details [`crypto.pbkdf2()`]: crypto.html#crypto_crypto_pbkdf2_password_salt_iterations_keylen_digest_callback [`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_callback [`os.networkInterfaces`]: os.html#os_os_networkinterfaces [`os.tmpdir()`]: os.html#os_os_tmpdir [`punycode`]: punycode.html [`require.extensions`]: modules.html#modules_require_extensions [`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`]: util.html [`worker.exitedAfterDisconnect`]: cluster.html#cluster_worker_exitedafterdisconnect [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 [`REPLServer.clearBufferedCommand()`]: repl.html#repl_replserver_clearbufferedcommand
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