Node.js v12.16.2 Documentation Deprecated APIs
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Deprecated APIs
Revoking deprecations
List of Deprecated APIs
DEP0001: http.OutgoingMessage.prototype.flush
DEP0002: require('_linklist')
DEP0003: _writableState.buffer
DEP0004: CryptoStream.prototype.readyState
DEP0005: Buffer() constructor
DEP0006: child_process options.customFds
DEP0007: Replace cluster worker.suicide with worker.exitedAfterDisconnect
DEP0008: require('constants')
DEP0009: crypto.pbkdf2 without digest
DEP0010: crypto.createCredentials
DEP0011: crypto.Credentials
DEP0012: Domain.dispose
DEP0013: fs asynchronous function without callback
DEP0014: fs.read legacy String interface
DEP0015: fs.readSync legacy String interface
DEP0016: GLOBAL/root
DEP0017: Intl.v8BreakIterator
DEP0018: Unhandled promise rejections
DEP0019: require('.') resolved outside directory
DEP0020: Server.connections
DEP0021: Server.listenFD
DEP0022: os.tmpDir()
DEP0023: os.getNetworkInterfaces()
DEP0024: REPLServer.prototype.convertToContext()
DEP0025: require('sys')
DEP0026: util.print()
DEP0027: util.puts()
DEP0028: util.debug()
DEP0029: util.error()
DEP0030: SlowBuffer
DEP0031: ecdh.setPublicKey()
DEP0032: domain module
DEP0033: EventEmitter.listenerCount()
DEP0034: fs.exists(path, callback)
DEP0035: fs.lchmod(path, mode, callback)
DEP0036: fs.lchmodSync(path, mode)
DEP0037: fs.lchown(path, uid, gid, callback)
DEP0038: fs.lchownSync(path, uid, gid)
DEP0039: require.extensions
DEP0040: punycode module
DEP0041: NODE_REPL_HISTORY_FILE environment variable
DEP0042: tls.CryptoStream
DEP0043: tls.SecurePair
DEP0044: util.isArray()
DEP0045: util.isBoolean()
DEP0046: util.isBuffer()
DEP0047: util.isDate()
DEP0048: util.isError()
DEP0049: util.isFunction()
DEP0050: util.isNull()
DEP0051: util.isNullOrUndefined()
DEP0052: util.isNumber()
DEP0053 util.isObject()
DEP0054: util.isPrimitive()
DEP0055: util.isRegExp()
DEP0056: util.isString()
DEP0057: util.isSymbol()
DEP0058: util.isUndefined()
DEP0059: util.log()
DEP0060: util._extend()
DEP0061: fs.SyncWriteStream
DEP0062: node --debug
DEP0063: ServerResponse.prototype.writeHeader()
DEP0064: tls.createSecurePair()
DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic
DEP0066: OutgoingMessage.prototype._headers, OutgoingMessage.prototype._headerNames
DEP0067: OutgoingMessage.prototype._renderHeaders
DEP0068: node debug
DEP0069: vm.runInDebugContext(string)
DEP0070: async_hooks.currentId()
DEP0071: async_hooks.triggerId()
DEP0072: async_hooks.AsyncResource.triggerId()
DEP0073: Several internal properties of net.Server
DEP0074: REPLServer.bufferedCommand
DEP0075: REPLServer.parseREPLKeyword()
DEP0076: tls.parseCertString()
DEP0077: Module._debug()
DEP0078: REPLServer.turnOffEditorMode()
DEP0079: Custom inspection function on Objects via .inspect()
DEP0080: path._makeLong()
DEP0081: fs.truncate() using a file descriptor
DEP0082: REPLServer.prototype.memory()
DEP0083: Disabling ECDH by setting ecdhCurve to false
DEP0084: requiring bundled internal dependencies
DEP0085: AsyncHooks Sensitive API
DEP0086: Remove runInAsyncIdScope
DEP0089: require('assert')
DEP0090: Invalid GCM authentication tag lengths
DEP0091: crypto.DEFAULT_ENCODING
DEP0092: Top-level this bound to module.exports
DEP0093: crypto.fips is deprecated and replaced.
DEP0094: Using assert.fail() with more than one argument.
DEP0095: timers.enroll()
DEP0096: timers.unenroll()
DEP0097: MakeCallback with domain property
DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs
DEP0099: async context-unaware node::MakeCallback C++ APIs
DEP0100: process.assert()
DEP0101: --with-lttng
DEP0102: Using noAssert in Buffer#(read|write) operations.
DEP0103: process.binding('util').is[...] typechecks
DEP0104: process.env string coercion
DEP0105: decipher.finaltol
DEP0106: crypto.createCipher and crypto.createDecipher
DEP0107: tls.convertNPNProtocols()
DEP0108: zlib.bytesRead
DEP0109: http, https, and tls support for invalid URLs
DEP0110: vm.Script cached data
DEP0111: process.binding()
DEP0112: dgram private APIs
DEP0113: Cipher.setAuthTag(), Decipher.getAuthTag()
DEP0114: crypto._toBuf()
DEP0115: crypto.prng(), crypto.pseudoRandomBytes(), crypto.rng()
DEP0116: Legacy URL API
DEP0117: Native crypto handles
DEP0118: dns.lookup() support for a falsy host name
DEP0119: process.binding('uv').errname() private API
DEP0120: Windows Performance Counter Support
DEP0121: net._setSimultaneousAccepts()
DEP0122: tls Server.prototype.setOptions()
DEP0123: setting the TLS ServerName to an IP address
DEP0124: using REPLServer.rli
DEP0125: require('_stream_wrap')
DEP0126: timers.active()
DEP0127: timers._unrefActive()
DEP0128: modules with an invalid main entry and an index.js file
DEP0129: ChildProcess._channel
DEP0130: Module.createRequireFromPath()
DEP0131: Legacy HTTP parser
DEP0132: worker.terminate() with callback
DEP0133: http connection
DEP0134: process._tickCallback
DEP0136: http finished
Deprecated APIs
Node.js may deprecate APIs 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 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.
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
DEP0001: http.OutgoingMessage.prototype.flush
History
Type: Runtime
The OutgoingMessage.prototype.flush() method is deprecated. Use OutgoingMessage.prototype.flushHeaders() instead.
DEP0002: require(’_linklist’)
History
Type: End-of-Life
The _linklist module is deprecated. Please use a userland alternative.
DEP0003: _writableState.buffer
History
Type: Runtime
The _writableState.buffer property is deprecated. Use the _writableState.getBuffer() method instead.
DEP0004: CryptoStream.prototype.readyState
History
Type: End-of-Life
The CryptoStream.prototype.readyState property was removed.
DEP0005: Buffer() constructor
History
Type: Runtime (supports --pending-deprecation)
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]]): Create a Buffer with initialized memory.
Buffer.allocUnsafe(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]]) - Create a Buffer that wraps the given arrayBuffer.
Buffer.from(buffer): Create a Buffer that copies buffer.
Buffer.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
History
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
History
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(‘constants’)
History
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.
DEP0009: crypto.pbkdf2 without digest
History
Type: Runtime
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 will print a deprecation warning to align with the behavior when digest is undefined.
DEP0010: crypto.createCredentials
History
Type: End-of-Life
The crypto.createCredentials() API was removed. Please use tls.createSecureContext() instead.
DEP0011: crypto.Credentials
History
Type: End-of-Life
The crypto.Credentials class was removed. Please use tls.SecureContext instead.
DEP0012: Domain.dispose
History
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
History
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
History
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
History
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
History
Type: Runtime
The GLOBAL and root aliases for the global property are deprecated and should no longer be used.
DEP0017: Intl.v8BreakIterator
History
Type: End-of-Life
Intl.v8BreakIterator was a non-standard extension and has been removed. See Intl.Segmenter.
DEP0018: Unhandled promise rejections
History
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.
DEP0019: require(’.’) resolved outside directory
History
Type: End-of-Life
In certain cases, require(’.’) could resolve outside the package directory. This behavior has been removed.
DEP0020: Server.connections
History
Type: Runtime
The Server.connections property is deprecated. Please use the Server.getConnections() method instead.
DEP0021: Server.listenFD
History
Type: End-of-Life
The Server.listenFD() method was deprecated and removed. Please use Server.listen({fd: }) instead.
DEP0022: os.tmpDir()
History
Type: Runtime
The os.tmpDir() API is deprecated. Please use os.tmpdir() instead.
DEP0023: os.getNetworkInterfaces()
History
Type: End-of-Life
The os.getNetworkInterfaces() method is deprecated. Please use the os.networkInterfaces() method instead.
DEP0024: REPLServer.prototype.convertToContext()
History
Type: End-of-Life
The REPLServer.prototype.convertToContext() API has been removed.
DEP0025: require(‘sys’)
History
Type: Runtime
The sys module is deprecated. Please use the util module instead.
DEP0026: util.print()
History
Type: End-of-Life
util.print() has been removed. Please use console.log() instead.
DEP0027: util.puts()
History
Type: End-of-Life
util.puts() has been removed. Please use console.log() instead.
DEP0028: util.debug()
History
Type: End-of-Life
util.debug() has been removed. Please use console.error() instead.
DEP0029: util.error()
History
Type: End-of-Life
util.error() has been removed. Please use console.error() instead.
DEP0030: SlowBuffer
History
Type: Documentation-only
The SlowBuffer class is deprecated. Please use Buffer.allocUnsafeSlow(size) instead.
DEP0031: ecdh.setPublicKey()
History
Type: Documentation-only
The ecdh.setPublicKey() method is now deprecated as its inclusion in the API is not useful.
DEP0032: domain module
History
Type: Documentation-only
The domain module is deprecated and should not be used.
DEP0033: EventEmitter.listenerCount()
History
Type: Documentation-only
The EventEmitter.listenerCount(emitter, eventName) API is deprecated. Please use emitter.listenerCount(eventName) instead.
DEP0034: fs.exists(path, callback)
History
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)
History
Type: Documentation-only
The fs.lchmod(path, mode, callback) API is deprecated.
DEP0036: fs.lchmodSync(path, mode)
History
Type: Documentation-only
The fs.lchmodSync(path, mode) API is deprecated.
DEP0037: fs.lchown(path, uid, gid, callback)
History
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)
History
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
History
Type: Documentation-only
The require.extensions property is deprecated.
DEP0040: punycode module
History
Type: Documentation-only
The punycode module is deprecated. Please use a userland alternative instead.
DEP0041: NODE_REPL_HISTORY_FILE environment variable
History
Type: End-of-Life
The NODE_REPL_HISTORY_FILE environment variable was removed. Please use NODE_REPL_HISTORY instead.
DEP0042: tls.CryptoStream
History
Type: End-of-Life
The tls.CryptoStream class was removed. Please use tls.TLSSocket instead.
DEP0043: tls.SecurePair
History
Type: Documentation-only
The tls.SecurePair class is deprecated. Please use tls.TLSSocket instead.
DEP0044: util.isArray()
History
Type: Documentation-only
The util.isArray() API is deprecated. Please use Array.isArray() instead.
DEP0045: util.isBoolean()
History
Type: Documentation-only
The util.isBoolean() API is deprecated.
DEP0046: util.isBuffer()
History
Type: Documentation-only
The util.isBuffer() API is deprecated. Please use Buffer.isBuffer() instead.
DEP0047: util.isDate()
History
Type: Documentation-only
The util.isDate() API is deprecated.
DEP0048: util.isError()
History
Type: Documentation-only
The util.isError() API is deprecated.
DEP0049: util.isFunction()
History
Type: Documentation-only
The util.isFunction() API is deprecated.
DEP0050: util.isNull()
History
Type: Documentation-only
The util.isNull() API is deprecated.
DEP0051: util.isNullOrUndefined()
History
Type: Documentation-only
The util.isNullOrUndefined() API is deprecated.
DEP0052: util.isNumber()
History
Type: Documentation-only
The util.isNumber() API is deprecated.
DEP0053 util.isObject()
History
Type: Documentation-only
The util.isObject() API is deprecated.
DEP0054: util.isPrimitive()
History
Type: Documentation-only
The util.isPrimitive() API is deprecated.
DEP0055: util.isRegExp()
History
Type: Documentation-only
The util.isRegExp() API is deprecated.
DEP0056: util.isString()
History
Type: Documentation-only
The util.isString() API is deprecated.
DEP0057: util.isSymbol()
History
Type: Documentation-only
The util.isSymbol() API is deprecated.
DEP0058: util.isUndefined()
History
Type: Documentation-only
The util.isUndefined() API is deprecated.
DEP0059: util.log()
History
Type: Documentation-only
The util.log() API is deprecated.
DEP0060: util._extend()
History
Type: Documentation-only
The util._extend() API is deprecated.
DEP0061: fs.SyncWriteStream
History
Type: End-of-Life
The fs.SyncWriteStream class was never intended to be a publicly accessible API and has been removed. No alternative API is available. Please use a userland alternative.
DEP0062: node --debug
History
Type: End-of-Life
–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.
DEP0063: ServerResponse.prototype.writeHeader()
History
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.
DEP0064: tls.createSecurePair()
History
Type: Runtime
The tls.createSecurePair() API was deprecated in documentation in Node.js 0.11.3. Users should use tls.Socket instead.
DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic
History
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.
DEP0066: OutgoingMessage.prototype._headers, OutgoingMessage.prototype._headerNames
History
Type: Runtime
The http module OutgoingMessage.prototype._headers and OutgoingMessage.prototype._headerNames properties are deprecated. Use one of the public methods (e.g. OutgoingMessage.prototype.getHeader(), OutgoingMessage.prototype.getHeaders(), OutgoingMessage.prototype.getHeaderNames(), OutgoingMessage.prototype.hasHeader(), OutgoingMessage.prototype.removeHeader(), OutgoingMessage.prototype.setHeader()) for working with outgoing headers.
The OutgoingMessage.prototype._headers and OutgoingMessage.prototype._headerNames properties were never documented as officially supported properties.
DEP0067: OutgoingMessage.prototype._renderHeaders
History
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.
DEP0068: node debug
History
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.
DEP0069: vm.runInDebugContext(string)
History
Type: End-of-Life
DebugContext has been removed in V8 and is not available in Node.js 10+.
DebugContext was an experimental API.
DEP0070: async_hooks.currentId()
History
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.
DEP0071: async_hooks.triggerId()
History
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.
DEP0072: async_hooks.AsyncResource.triggerId()
History
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.
DEP0073: Several internal properties of net.Server
History
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.
DEP0074: REPLServer.bufferedCommand
History
Type: Runtime
The REPLServer.bufferedCommand property was deprecated in favor of REPLServer.clearBufferedCommand().
DEP0075: REPLServer.parseREPLKeyword()
History
Type: Runtime
REPLServer.parseREPLKeyword() was removed from userland visibility.
DEP0076: tls.parseCertString()
History
Type: Runtime
tls.parseCertString() is a trivial parsing helper that was made public by mistake. This function can usually be replaced with:
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:
querystring.parse(’%E5%A5%BD=1’, ‘\n’, ‘=’);
{ ‘好’: ‘1’ }
tls.parseCertString(’%E5%A5%BD=1’);
{ ‘%E5%A5%BD’: ‘1’ }
DEP0077: Module._debug()
History
Type: Runtime
Module._debug() is deprecated.
The Module._debug() function was never documented as an officially supported API.
DEP0078: REPLServer.turnOffEditorMode()
History
Type: Runtime
REPLServer.turnOffEditorMode() was removed from userland visibility.
DEP0079: Custom inspection function on Objects via .inspect()
History
Type: End-of-Life
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.
DEP0080: path._makeLong()
History
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.
DEP0081: fs.truncate() using a file descriptor
History
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.
DEP0082: REPLServer.prototype.memory()
History
Type: Runtime
REPLServer.prototype.memory() is only necessary for the internal mechanics of the REPLServer itself. Do not use this function.
DEP0083: Disabling ECDH by setting ecdhCurve to false
History
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.
DEP0084: requiring bundled internal dependencies
History
Type: End-of-Life
Since Node.js versions 4.4.0 and 5.2.0, several modules only intended for internal usage were mistakenly exposed to user code through require(). These modules were:
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.
DEP0085: AsyncHooks Sensitive API
History
Type: End-of-Life
The AsyncHooks Sensitive API was never documented and had various minor issues. Use the AsyncResource API instead. See https://github.com/nodejs/node/issues/15572.
DEP0086: Remove runInAsyncIdScope
History
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.
DEP0089: require(‘assert’)
History
Type: Deprecation revoked
Importing assert directly was not recommended as the exposed functions use loose equality checks. The deprecation was revoked because use of the assert module is not discouraged, and the deprecation caused end user confusion.
DEP0090: Invalid GCM authentication tag lengths
History
Type: End-of-Life
Node.js used to support all GCM authentication tag lengths which are accepted by OpenSSL when calling decipher.setAuthTag(). Beginning with Node.js v11.0.0, only authentication tag lengths of 128, 120, 112, 104, 96, 64, and 32 bits are allowed. Authentication tags of other lengths are invalid per NIST SP 800-38D.
DEP0091: crypto.DEFAULT_ENCODING
History
Type: Runtime
The crypto.DEFAULT_ENCODING property is deprecated.
DEP0092: Top-level this bound to module.exports
History
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.
DEP0093: crypto.fips is deprecated and replaced.
History
Type: Documentation-only
The crypto.fips property is deprecated. Please use crypto.setFips() and crypto.getFips() instead.
DEP0094: Using assert.fail() with more than one argument.
History
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.
DEP0095: timers.enroll()
History
Type: Runtime
timers.enroll() is deprecated. Please use the publicly documented setTimeout() or setInterval() instead.
DEP0096: timers.unenroll()
History
Type: Runtime
timers.unenroll() is deprecated. Please use the publicly documented clearTimeout() or clearInterval() instead.
DEP0097: MakeCallback with domain property
History
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.
DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs
History
Type: End-of-Life
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.
DEP0099: async context-unaware node::MakeCallback C++ APIs
History
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.
DEP0100: process.assert()
History
Type: Runtime
process.assert() is deprecated. Please use the assert module instead.
This was never a documented feature.
DEP0101: --with-lttng
History
Type: End-of-Life
The --with-lttng compile-time option has been removed.
DEP0102: Using noAssert in Buffer#(read|write) operations.
History
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.
DEP0103: process.binding(‘util’).is[…] typechecks
History
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).
DEP0104: process.env string coercion
History
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.
DEP0105: decipher.finaltol
History
Type: End-of-Life
decipher.finaltol() has never been documented and was an alias for decipher.final(). This API has been removed, and it is recommended to use decipher.final() instead.
DEP0106: crypto.createCipher and crypto.createDecipher
History
Type: Runtime
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.
DEP0107: tls.convertNPNProtocols()
History
Type: End-of-Life
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.
DEP0108: zlib.bytesRead
History
Type: Runtime
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.
DEP0109: http, https, and tls support for invalid URLs
History
Type: Runtime
Some previously supported (but strictly invalid) URLs were accepted through the http.request(), http.get(), https.request(), https.get(), and tls.checkServerIdentity() APIs because those were accepted by the legacy url.parse() API. The mentioned APIs now use the WHATWG URL parser that requires strictly valid URLs. Passing an invalid URL is deprecated and support will be removed in the future.
DEP0110: vm.Script cached data
History
Type: Documentation-only
The produceCachedData option is deprecated. Use script.createCachedData() instead.
DEP0111: process.binding()
History
Type: Documentation-only (supports --pending-deprecation)
process.binding() is for use by Node.js internal code only.
DEP0112: dgram private APIs
History
Type: Runtime
The dgram module previously contained several APIs that were never meant to accessed outside of Node.js core: Socket.prototype._handle, Socket.prototype._receiving, Socket.prototype._bindState, Socket.prototype._queue, Socket.prototype._reuseAddr, Socket.prototype._healthCheck(), Socket.prototype._stopReceiving(), and dgram._createSocketHandle().
DEP0113: Cipher.setAuthTag(), Decipher.getAuthTag()
History
Type: End-of-Life
Cipher.setAuthTag() and Decipher.getAuthTag() are no longer available. They were never documented and would throw when called.
DEP0114: crypto._toBuf()
History
Type: End-of-Life
The crypto._toBuf() function was not designed to be used by modules outside of Node.js core and was removed.
DEP0115: crypto.prng(), crypto.pseudoRandomBytes(), crypto.rng()
History
Type: Documentation-only (supports --pending-deprecation)
In recent versions of Node.js, there is no difference between crypto.randomBytes() and crypto.pseudoRandomBytes(). The latter is deprecated along with the undocumented aliases crypto.prng() and crypto.rng() in favor of crypto.randomBytes() and may be removed in a future release.
DEP0116: Legacy URL API
History
Type: Documentation-only
The Legacy URL API is deprecated. This includes url.format(), url.parse(), url.resolve(), and the legacy urlObject. Please use the WHATWG URL API instead.
DEP0117: Native crypto handles
History
Type: End-of-Life
Previous versions of Node.js exposed handles to internal native objects through the _handle property of the Cipher, Decipher, DiffieHellman, DiffieHellmanGroup, ECDH, Hash, Hmac, Sign, and Verify classes. The _handle property has been removed because improper use of the native object can lead to crashing the application.
DEP0118: dns.lookup() support for a falsy host name
History
Type: Runtime
Previous versions of Node.js supported dns.lookup() with a falsy host name like dns.lookup(false) due to backward compatibility. This behavior is undocumented and is thought to be unused in real world apps. It will become an error in future versions of Node.js.
DEP0119: process.binding(‘uv’).errname() private API
History
Type: Documentation-only (supports --pending-deprecation)
process.binding(‘uv’).errname() is deprecated. Please use util.getSystemErrorName() instead.
DEP0120: Windows Performance Counter Support
History
Type: End-of-Life
Windows Performance Counter support has been removed from Node.js. The undocumented COUNTER_NET_SERVER_CONNECTION(), COUNTER_NET_SERVER_CONNECTION_CLOSE(), COUNTER_HTTP_SERVER_REQUEST(), COUNTER_HTTP_SERVER_RESPONSE(), COUNTER_HTTP_CLIENT_REQUEST(), and COUNTER_HTTP_CLIENT_RESPONSE() functions have been deprecated.
DEP0121: net._setSimultaneousAccepts()
History
Type: Runtime
The undocumented net._setSimultaneousAccepts() function was originally intended for debugging and performance tuning when using the child_process and cluster modules on Windows. The function is not generally useful and is being removed. See discussion here: https://github.com/nodejs/node/issues/18391
DEP0122: tls Server.prototype.setOptions()
History
Type: Runtime
Please use Server.prototype.setSecureContext() instead.
DEP0123: setting the TLS ServerName to an IP address
History
Type: Runtime
Setting the TLS ServerName to an IP address is not permitted by RFC 6066. This will be ignored in a future version.
DEP0124: using REPLServer.rli
History
Type: Runtime
This property is a reference to the instance itself.
DEP0125: require(’_stream_wrap’)
History
Type: Runtime
The _stream_wrap module is deprecated.
DEP0126: timers.active()
History
Type: Runtime
The previously undocumented timers.active() is deprecated. Please use the publicly documented timeout.refresh() instead. If re-referencing the timeout is necessary, timeout.ref() can be used with no performance impact since Node.js 10.
DEP0127: timers._unrefActive()
History
Type: Runtime
The previously undocumented and “private” timers._unrefActive() is deprecated. Please use the publicly documented timeout.refresh() instead. If unreferencing the timeout is necessary, timeout.unref() can be used with no performance impact since Node.js 10.
DEP0128: modules with an invalid main entry and an index.js file
History
Type: Documentation-only (supports --pending-deprecation)
Modules that have an invalid main entry (e.g., ./does-not-exist.js) and also have an index.js file in the top level directory will resolve the index.js file. That is deprecated and is going to throw an error in future Node.js versions.
DEP0129: ChildProcess._channel
History
Type: Documentation-only
The _channel property of child process objects returned by spawn() and similar functions is not intended for public use. Use ChildProcess.channel instead.
DEP0130: Module.createRequireFromPath()
History
Type: Documentation-only
Module.createRequireFromPath() is deprecated. Please use module.createRequire() instead.
DEP0131: Legacy HTTP parser
History
Type: Documentation-only
The legacy HTTP parser, used by default in versions of Node.js prior to 12.0.0, is deprecated. This deprecation applies to users of the --http-parser=legacy command-line flag.
DEP0132: worker.terminate() with callback
History
Type: Runtime
Passing a callback to worker.terminate() is deprecated. Use the returned Promise instead, or a listener to the worker’s ‘exit’ event.
DEP0133: http connection
History
Type: Documentation-only
Prefer response.socket over response.connection and request.socket over request.connection.
DEP0134: process._tickCallback
History
Type: Documentation-only (supports --pending-deprecation)
The process._tickCallback property was never documented as an officially supported API.
DEP0136: http finished
History
Type: Documentation-only
response.finished indicates whether response.end() has been called, not whether ‘finish’ has been emitted and the underlying data is flushed.
Use response.writableFinished or response.writableEnded accordingly instead to avoid the ambigiuty.
To maintain existing behaviour response.finished should be replaced with response.writableEnded.