Deprecated APIs | Node.js v26.8.2 Documentation Skip to content Node.js * About this documentation * Usage and example * Assertion testing * Asynchronous context tracking * Async hooks * Buffer * C++ addons * C/C++ addons with Node-API * C++ embedder API * Child processes * Cluster * Command-line options * Console * Crypto * Debugger * Deprecated APIs * Diagnostics Channel * DNS * Domain * Environment Variables * Errors * Events * File system * FFI * Globals * HTTP * HTTP/2 * HTTPS * Inspector * Internationalization * Iterable Streams API * Modules: CommonJS modules * Modules: ECMAScript modules * Modules: node:module API * Modules: Packages * Modules: TypeScript * Net * OS * Path * Performance hooks * Permissions * Process * Punycode * Query strings * Readline * REPL * Report * Single executable applications * SQLite * Stream * String decoder * Test runner * Timers * TLS/SSL * Trace events * TTY * UDP/datagram * URL * Utilities * V8 * Virtual File System * VM * WASI * Web Crypto API * Web Streams API * Worker threads * Zlib * Code repository and issue tracker Node.js v26.8.2 documentation * Node.js v26.8.2 * Table of contents * 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('node: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('node:sys') * DEP0026: util.print() * DEP0027: util.puts() * DEP0028: util.debug() * DEP0029: util.error() * DEP0030: SlowBuffer * DEP0031: ecdh.setPublicKey() * DEP0032: node: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: node: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('node: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('node:_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 * DEP0135: WriteStream.open() and ReadStream.open() are internal * DEP0136: http finished * DEP0137: Closing fs.FileHandle on garbage collection * DEP0138: process.mainModule * DEP0139: process.umask() with no arguments * DEP0140: Use request.destroy() instead of request.abort() * DEP0141: repl.inputStream and repl.outputStream * DEP0142: repl._builtinLibs * DEP0143: Transform._transformState * DEP0144: module.parent * DEP0145: socket.bufferSize * DEP0146: new crypto.Certificate() * DEP0147: fs.rmdir(path, { recursive: true }) * DEP0148: Folder mappings in "exports" (trailing "/" ) * DEP0149: http.IncomingMessage#connection * DEP0150: Changing the value of process.config * DEP0151: Main index lookup and extension searching * DEP0152: Extension PerformanceEntry properties * DEP0153: dns.lookup and dnsPromises.lookup options type coercion * DEP0154: RSA-PSS generate key pair options * DEP0155: Trailing slashes in pattern specifier resolutions * DEP0156: .aborted property and 'abort' , 'aborted' event in http * DEP0157: Thenable support in streams * DEP0158: buffer.slice(start, end) * DEP0159: ERR_INVALID_CALLBACK * DEP0160: process.on('multipleResolves', handler) * DEP0161: process._getActiveRequests() and process._getActiveHandles() * DEP0162: fs.write() , fs.writeFileSync() coercion to string * DEP0163: channel.subscribe(onMessage) , channel.unsubscribe(onMessage) * DEP0164: process.exit(code) , process.exitCode coercion to integer * DEP0165: --trace-atomics-wait * DEP0166: Double slashes in imports and exports targets * DEP0167: Weak DiffieHellmanGroup instances ( modp1 , modp2 , modp5 ) * DEP0168: Unhandled exception in Node-API callbacks * DEP0169: Insecure url.parse() * DEP0170: Invalid port when using url.parse() * DEP0171: Setters for http.IncomingMessage headers and trailers * DEP0172: The asyncResource property of AsyncResource bound functions * DEP0173: the assert.CallTracker class * DEP0174: calling promisify on a function that returns a Promise * DEP0175: util.toUSVString * DEP0176: fs.F_OK , fs.R_OK , fs.W_OK , fs.X_OK * DEP0177: util.types.isWebAssemblyCompiledModule * DEP0178: dirent.path * DEP0179: Hash constructor * DEP0180: fs.Stats constructor * DEP0181: Hmac constructor * DEP0182: Short GCM authentication tags without explicit authTagLength * DEP0183: OpenSSL engine-based APIs * DEP0184: Instantiating node:zlib classes without new * DEP0185: Instantiating node:repl classes without new * DEP0187: Passing invalid argument types to fs.existsSync * DEP0188: process.features.ipv6 and process.features.uv * DEP0189: process.features.tls_* * DEP0190: Passing args to node:child_process execFile / spawn with shell option * DEP0191: repl.builtinModules * DEP0192: require('node:_tls_common') and require('node:_tls_wrap') * DEP0193: require('node:_stream_*') * DEP0194: HTTP/2 priority signaling * DEP0195: Instantiating node:http classes without new * DEP0196: Calling node:child_process functions with options.shell as an empty string * DEP0197: util.types.isNativeError() * DEP0198: Creating SHAKE-128 and SHAKE-256 digests without an explicit options.outputLength * DEP0199: require('node:_http_*') * DEP0200: Closing fs.Dir on garbage collection * DEP0201: Passing options.type to Duplex.toWeb() * DEP0202: Http1IncomingMessage and Http1ServerResponse options of HTTP/2 servers * DEP0203: Passing CryptoKey to node:crypto APIs * DEP0204: KeyObject.from() with non-extractable CryptoKey * DEP0205: module.register() * DEP0206: Calling digest() on an already-finalized Hmac instance * DEP0208: Server.prototype._listen2 * DEP0209: Using AbortSignal to dispose of resources * Index * Index * About this documentation * Usage and example * Assertion testing * Asynchronous context tracking * Async hooks * Buffer * C++ addons * C/C++ addons with Node-API * C++ embedder API * Child processes * Cluster * Command-line options * Console * Crypto * Debugger * Deprecated APIs * Diagnostics Channel * DNS * Domain * Environment Variables * Errors * Events * File system * FFI * Globals * HTTP * HTTP/2 * HTTPS * Inspector * Internationalization * Iterable Streams API * Modules: CommonJS modules * Modules: ECMAScript modules * Modules: node:module API * Modules: Packages * Modules: TypeScript * Net * OS * Path * Performance hooks * Permissions * Process * Punycode * Query strings * Readline * REPL * Report * Single executable applications * SQLite * Stream * String decoder * Test runner * Timers * TLS/SSL * Trace events * TTY * UDP/datagram * URL * Utilities * V8 * Virtual File System * VM * WASI * Web Crypto API * Web Streams API * Worker threads * Zlib * Other versions * 26.x * 25.x * 24.x LTS * 23.x * 22.x LTS * 21.x * 20.x * 19.x * 18.x * 17.x * 16.x * 15.x * 14.x * 13.x * 12.x * 11.x * 10.x * 9.x * 8.x * 7.x * Options * View on single page * View as JSON * Edit on GitHub Table of contents * 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('node: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('node:sys') * DEP0026: util.print() * DEP0027: util.puts() * DEP0028: util.debug() * DEP0029: util.error() * DEP0030: SlowBuffer * DEP0031: ecdh.setPublicKey() * DEP0032: node: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: node: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('node: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('node:_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 * DEP0135: WriteStream.open() and ReadStream.open() are internal * DEP0136: http finished * DEP0137: Closing fs.FileHandle on garbage collection * DEP0138: process.mainModule * DEP0139: process.umask() with no arguments * DEP0140: Use request.destroy() instead of request.abort() * DEP0141: repl.inputStream and repl.outputStream * DEP0142: repl._builtinLibs * DEP0143: Transform._transformState * DEP0144: module.parent * DEP0145: socket.bufferSize * DEP0146: new crypto.Certificate() * DEP0147: fs.rmdir(path, { recursive: true }) * DEP0148: Folder mappings in "exports" (trailing "/" ) * DEP0149: http.IncomingMessage#connection * DEP0150: Changing the value of process.config * DEP0151: Main index lookup and extension searching * DEP0152: Extension PerformanceEntry properties * DEP0153: dns.lookup and dnsPromises.lookup options type coercion * DEP0154: RSA-PSS generate key pair options * DEP0155: Trailing slashes in pattern specifier resolutions * DEP0156: .aborted property and 'abort' , 'aborted' event in http * DEP0157: Thenable support in streams * DEP0158: buffer.slice(start, end) * DEP0159: ERR_INVALID_CALLBACK * DEP0160: process.on('multipleResolves', h