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<h1>Node.js v22.14.0 documentation</h1>
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<li class="pinned-header">Node.js v22.14.0</li>
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Table of contents
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<div class="picker" tabindex="-1"><div class="toc"><ul id="toc-picker">
<li><a href="#deprecated-apis">Deprecated APIs</a>
<ul>
<li><a href="#revoking-deprecations">Revoking deprecations</a></li>
<li><a href="#list-of-deprecated-apis">List of deprecated APIs</a>
<ul>
<li><a href="#DEP0001">DEP0001: <code>http.OutgoingMessage.prototype.flush</code></a></li>
<li><a href="#DEP0002">DEP0002: <code>require('_linklist')</code></a></li>
<li><a href="#DEP0003">DEP0003: <code>_writableState.buffer</code></a></li>
<li><a href="#DEP0004">DEP0004: <code>CryptoStream.prototype.readyState</code></a></li>
<li><a href="#DEP0005">DEP0005: <code>Buffer()</code> constructor</a></li>
<li><a href="#DEP0006">DEP0006: <code>child_process</code> <code>options.customFds</code></a></li>
<li><a href="#DEP0007">DEP0007: Replace <code>cluster</code> <code>worker.suicide</code> with <code>worker.exitedAfterDisconnect</code></a></li>
<li><a href="#DEP0008">DEP0008: <code>require('node:constants')</code></a></li>
<li><a href="#DEP0009">DEP0009: <code>crypto.pbkdf2</code> without digest</a></li>
<li><a href="#DEP0010">DEP0010: <code>crypto.createCredentials</code></a></li>
<li><a href="#DEP0011">DEP0011: <code>crypto.Credentials</code></a></li>
<li><a href="#DEP0012">DEP0012: <code>Domain.dispose</code></a></li>
<li><a href="#DEP0013">DEP0013: <code>fs</code> asynchronous function without callback</a></li>
<li><a href="#DEP0014">DEP0014: <code>fs.read</code> legacy String interface</a></li>
<li><a href="#DEP0015">DEP0015: <code>fs.readSync</code> legacy String interface</a></li>
<li><a href="#DEP0016">DEP0016: <code>GLOBAL</code>/<code>root</code></a></li>
<li><a href="#DEP0017">DEP0017: <code>Intl.v8BreakIterator</code></a></li>
<li><a href="#DEP0018">DEP0018: Unhandled promise rejections</a></li>
<li><a href="#DEP0019">DEP0019: <code>require('.')</code> resolved outside directory</a></li>
<li><a href="#DEP0020">DEP0020: <code>Server.connections</code></a></li>
<li><a href="#DEP0021">DEP0021: <code>Server.listenFD</code></a></li>
<li><a href="#DEP0022">DEP0022: <code>os.tmpDir()</code></a></li>
<li><a href="#DEP0023">DEP0023: <code>os.getNetworkInterfaces()</code></a></li>
<li><a href="#DEP0024">DEP0024: <code>REPLServer.prototype.convertToContext()</code></a></li>
<li><a href="#DEP0025">DEP0025: <code>require('node:sys')</code></a></li>
<li><a href="#DEP0026">DEP0026: <code>util.print()</code></a></li>
<li><a href="#DEP0027">DEP0027: <code>util.puts()</code></a></li>
<li><a href="#DEP0028">DEP0028: <code>util.debug()</code></a></li>
<li><a href="#DEP0029">DEP0029: <code>util.error()</code></a></li>
<li><a href="#DEP0030">DEP0030: <code>SlowBuffer</code></a></li>
<li><a href="#DEP0031">DEP0031: <code>ecdh.setPublicKey()</code></a></li>
<li><a href="#DEP0032">DEP0032: <code>node:domain</code> module</a></li>
<li><a href="#DEP0033">DEP0033: <code>EventEmitter.listenerCount()</code></a></li>
<li><a href="#DEP0034">DEP0034: <code>fs.exists(path, callback)</code></a></li>
<li><a href="#DEP0035">DEP0035: <code>fs.lchmod(path, mode, callback)</code></a></li>
<li><a href="#DEP0036">DEP0036: <code>fs.lchmodSync(path, mode)</code></a></li>
<li><a href="#DEP0037">DEP0037: <code>fs.lchown(path, uid, gid, callback)</code></a></li>
<li><a href="#DEP0038">DEP0038: <code>fs.lchownSync(path, uid, gid)</code></a></li>
<li><a href="#DEP0039">DEP0039: <code>require.extensions</code></a></li>
<li><a href="#DEP0040">DEP0040: <code>node:punycode</code> module</a></li>
<li><a href="#DEP0041">DEP0041: <code>NODE_REPL_HISTORY_FILE</code> environment variable</a></li>
<li><a href="#DEP0042">DEP0042: <code>tls.CryptoStream</code></a></li>
<li><a href="#DEP0043">DEP0043: <code>tls.SecurePair</code></a></li>
<li><a href="#DEP0044">DEP0044: <code>util.isArray()</code></a></li>
<li><a href="#DEP0045">DEP0045: <code>util.isBoolean()</code></a></li>
<li><a href="#DEP0046">DEP0046: <code>util.isBuffer()</code></a></li>
<li><a href="#DEP0047">DEP0047: <code>util.isDate()</code></a></li>
<li><a href="#DEP0048">DEP0048: <code>util.isError()</code></a></li>
<li><a href="#DEP0049">DEP0049: <code>util.isFunction()</code></a></li>
<li><a href="#DEP0050">DEP0050: <code>util.isNull()</code></a></li>
<li><a href="#DEP0051">DEP0051: <code>util.isNullOrUndefined()</code></a></li>
<li><a href="#DEP0052">DEP0052: <code>util.isNumber()</code></a></li>
<li><a href="#DEP0053">DEP0053: <code>util.isObject()</code></a></li>
<li><a href="#DEP0054">DEP0054: <code>util.isPrimitive()</code></a></li>
<li><a href="#DEP0055">DEP0055: <code>util.isRegExp()</code></a></li>
<li><a href="#DEP0056">DEP0056: <code>util.isString()</code></a></li>
<li><a href="#DEP0057">DEP0057: <code>util.isSymbol()</code></a></li>
<li><a href="#DEP0058">DEP0058: <code>util.isUndefined()</code></a></li>
<li><a href="#DEP0059">DEP0059: <code>util.log()</code></a></li>
<li><a href="#DEP0060">DEP0060: <code>util._extend()</code></a></li>
<li><a href="#DEP0061">DEP0061: <code>fs.SyncWriteStream</code></a></li>
<li><a href="#DEP0062">DEP0062: <code>node --debug</code></a></li>
<li><a href="#DEP0063">DEP0063: <code>ServerResponse.prototype.writeHeader()</code></a></li>
<li><a href="#DEP0064">DEP0064: <code>tls.createSecurePair()</code></a></li>
<li><a href="#DEP0065">DEP0065: <code>repl.REPL_MODE_MAGIC</code> and <code>NODE_REPL_MODE=magic</code></a></li>
<li><a href="#DEP0066">DEP0066: <code>OutgoingMessage.prototype._headers, OutgoingMessage.prototype._headerNames</code></a></li>
<li><a href="#DEP0067">DEP0067: <code>OutgoingMessage.prototype._renderHeaders</code></a></li>
<li><a href="#DEP0068">DEP0068: <code>node debug</code></a></li>
<li><a href="#DEP0069">DEP0069: <code>vm.runInDebugContext(string)</code></a></li>
<li><a href="#DEP0070">DEP0070: <code>async_hooks.currentId()</code></a></li>
<li><a href="#DEP0071">DEP0071: <code>async_hooks.triggerId()</code></a></li>
<li><a href="#DEP0072">DEP0072: <code>async_hooks.AsyncResource.triggerId()</code></a></li>
<li><a href="#DEP0073">DEP0073: Several internal properties of <code>net.Server</code></a></li>
<li><a href="#DEP0074">DEP0074: <code>REPLServer.bufferedCommand</code></a></li>
<li><a href="#DEP0075">DEP0075: <code>REPLServer.parseREPLKeyword()</code></a></li>
<li><a href="#DEP0076">DEP0076: <code>tls.parseCertString()</code></a></li>
<li><a href="#DEP0077">DEP0077: <code>Module._debug()</code></a></li>
<li><a href="#DEP0078">DEP0078: <code>REPLServer.turnOffEditorMode()</code></a></li>
<li><a href="#DEP0079">DEP0079: Custom inspection function on objects via <code>.inspect()</code></a></li>
<li><a href="#DEP0080">DEP0080: <code>path._makeLong()</code></a></li>
<li><a href="#DEP0081">DEP0081: <code>fs.truncate()</code> using a file descriptor</a></li>
<li><a href="#DEP0082">DEP0082: <code>REPLServer.prototype.memory()</code></a></li>
<li><a href="#DEP0083">DEP0083: Disabling ECDH by setting <code>ecdhCurve</code> to <code>false</code></a></li>
<li><a href="#DEP0084">DEP0084: requiring bundled internal dependencies</a></li>
<li><a href="#DEP0085">DEP0085: AsyncHooks sensitive API</a></li>
<li><a href="#DEP0086">DEP0086: Remove <code>runInAsyncIdScope</code></a></li>
<li><a href="#DEP0089">DEP0089: <code>require('node:assert')</code></a></li>
<li><a href="#DEP0090">DEP0090: Invalid GCM authentication tag lengths</a></li>
<li><a href="#DEP0091">DEP0091: <code>crypto.DEFAULT_ENCODING</code></a></li>
<li><a href="#DEP0092">DEP0092: Top-level <code>this</code> bound to <code>module.exports</code></a></li>
<li><a href="#DEP0093">DEP0093: <code>crypto.fips</code> is deprecated and replaced</a></li>
<li><a href="#DEP0094">DEP0094: Using <code>assert.fail()</code> with more than one argument</a></li>
<li><a href="#DEP0095">DEP0095: <code>timers.enroll()</code></a></li>
<li><a href="#DEP0096">DEP0096: <code>timers.unenroll()</code></a></li>
<li><a href="#DEP0097">DEP0097: <code>MakeCallback</code> with <code>domain</code> property</a></li>
<li><a href="#DEP0098">DEP0098: AsyncHooks embedder <code>AsyncResource.emitBefore</code> and <code>AsyncResource.emitAfter</code> APIs</a></li>
<li><a href="#DEP0099">DEP0099: Async context-unaware <code>node::MakeCallback</code> C++ APIs</a></li>
<li><a href="#DEP0100">DEP0100: <code>process.assert()</code></a></li>
<li><a href="#DEP0101">DEP0101: <code>--with-lttng</code></a></li>
<li><a href="#DEP0102">DEP0102: Using <code>noAssert</code> in <code>Buffer#(read|write)</code> operations</a></li>
<li><a href="#DEP0103">DEP0103: <code>process.binding('util').is[...]</code> typechecks</a></li>
<li><a href="#DEP0104">DEP0104: <code>process.env</code> string coercion</a></li>
<li><a href="#DEP0105">DEP0105: <code>decipher.finaltol</code></a></li>
<li><a href="#DEP0106">DEP0106: <code>crypto.createCipher</code> and <code>crypto.createDecipher</code></a></li>
<li><a href="#DEP0107">DEP0107: <code>tls.convertNPNProtocols()</code></a></li>
<li><a href="#DEP0108">DEP0108: <code>zlib.bytesRead</code></a></li>
<li><a href="#DEP0109">DEP0109: <code>http</code>, <code>https</code>, and <code>tls</code> support for invalid URLs</a></li>
<li><a href="#DEP0110">DEP0110: <code>vm.Script</code> cached data</a></li>
<li><a href="#DEP0111">DEP0111: <code>process.binding()</code></a></li>
<li><a href="#DEP0112">DEP0112: <code>dgram</code> private APIs</a></li>
<li><a href="#DEP0113">DEP0113: <code>Cipher.setAuthTag()</code>, <code>Decipher.getAuthTag()</code></a></li>
<li><a href="#DEP0114">DEP0114: <code>crypto._toBuf()</code></a></li>
<li><a href="#DEP0115">DEP0115: <code>crypto.prng()</code>, <code>crypto.pseudoRandomBytes()</code>, <code>crypto.rng()</code></a></li>
<li><a href="#DEP0116">DEP0116: Legacy URL API</a></li>
<li><a href="#DEP0117">DEP0117: Native crypto handles</a></li>
<li><a href="#DEP0118">DEP0118: <code>dns.lookup()</code> support for a falsy host name</a></li>
<li><a href="#DEP0119">DEP0119: <code>process.binding('uv').errname()</code> private API</a></li>
<li><a href="#DEP0120">DEP0120: Windows Performance Counter support</a></li>
<li><a href="#DEP0121">DEP0121: <code>net._setSimultaneousAccepts()</code></a></li>
<li><a href="#DEP0122">DEP0122: <code>tls</code> <code>Server.prototype.setOptions()</code></a></li>
<li><a href="#DEP0123">DEP0123: setting the TLS ServerName to an IP address</a></li>
<li><a href="#DEP0124">DEP0124: using <code>REPLServer.rli</code></a></li>
<li><a href="#DEP0125">DEP0125: <code>require('node:_stream_wrap')</code></a></li>
<li><a href="#DEP0126">DEP0126: <code>timers.active()</code></a></li>
<li><a href="#DEP0127">DEP0127: <code>timers._unrefActive()</code></a></li>
<li><a href="#DEP0128">DEP0128: modules with an invalid <code>main</code> entry and an <code>index.js</code> file</a></li>
<li><a href="#DEP0129">DEP0129: <code>ChildProcess._channel</code></a></li>
<li><a href="#DEP0130">DEP0130: <code>Module.createRequireFromPath()</code></a></li>
<li><a href="#DEP0131">DEP0131: Legacy HTTP parser</a></li>
<li><a href="#DEP0132">DEP0132: <code>worker.terminate()</code> with callback</a></li>
<li><a href="#DEP0133">DEP0133: <code>http</code> <code>connection</code></a></li>
<li><a href="#DEP0134">DEP0134: <code>process._tickCallback</code></a></li>
<li><a href="#DEP0135">DEP0135: <code>WriteStream.open()</code> and <code>ReadStream.open()</code> are internal</a></li>
<li><a href="#DEP0136">DEP0136: <code>http</code> <code>finished</code></a></li>
<li><a href="#DEP0137">DEP0137: Closing fs.FileHandle on garbage collection</a></li>
<li><a href="#DEP0138">DEP0138: <code>process.mainModule</code></a></li>
<li><a href="#DEP0139">DEP0139: <code>process.umask()</code> with no arguments</a></li>
<li><a href="#DEP0140">DEP0140: Use <code>request.destroy()</code> instead of <code>request.abort()</code></a></li>
<li><a href="#DEP0141">DEP0141: <code>repl.inputStream</code> and <code>repl.outputStream</code></a></li>
<li><a href="#DEP0142">DEP0142: <code>repl._builtinLibs</code></a></li>
<li><a href="#DEP0143">DEP0143: <code>Transform._transformState</code></a></li>
<li><a href="#DEP0144">DEP0144: <code>module.parent</code></a></li>
<li><a href="#DEP0145">DEP0145: <code>socket.bufferSize</code></a></li>
<li><a href="#DEP0146">DEP0146: <code>new crypto.Certificate()</code></a></li>
<li><a href="#DEP0147">DEP0147: <code>fs.rmdir(path, { recursive: true })</code></a></li>
<li><a href="#DEP0148">DEP0148: Folder mappings in <code>"exports"</code> (trailing <code>"/"</code>)</a></li>
<li><a href="#DEP0149">DEP0149: <code>http.IncomingMessage#connection</code></a></li>
<li><a href="#DEP0150">DEP0150: Changing the value of <code>process.config</code></a></li>
<li><a href="#DEP0151">DEP0151: Main index lookup and extension searching</a></li>
<li><a href="#DEP0152">DEP0152: Extension PerformanceEntry properties</a></li>
<li><a href="#DEP0153">DEP0153: <code>dns.lookup</code> and <code>dnsPromises.lookup</code> options type coercion</a></li>
<li><a href="#DEP0154">DEP0154: RSA-PSS generate key pair options</a></li>
<li><a href="#DEP0155">DEP0155: Trailing slashes in pattern specifier resolutions</a></li>
<li><a href="#DEP0156">DEP0156: <code>.aborted</code> property and <code>'abort'</code>, <code>'aborted'</code> event in <code>http</code></a></li>
<li><a href="#DEP0157">DEP0157: Thenable support in streams</a></li>
<li><a href="#DEP0158">DEP0158: <code>buffer.slice(start, end)</code></a></li>
<li><a href="#DEP0159">DEP0159: <code>ERR_INVALID_CALLBACK</code></a></li>
<li><a href="#DEP0160">DEP0160: <code>process.on('multipleResolves', handler)</code></a></li>
<li><a href="#DEP0161">DEP0161: <code>process._getActiveRequests()</code> and <code>process._getActiveHandles()</code></a></li>
<li><a href="#DEP0162">DEP0162: <code>fs.write()</code>, <code>fs.writeFileSync()</code> coercion to string</a></li>
<li><a href="#DEP0163">DEP0163: <code>channel.subscribe(onMessage)</code>, <code>channel.unsubscribe(onMessage)</code></a></li>
<li><a href="#DEP0164">DEP0164: <code>process.exit(code)</code>, <code>process.exitCode</code> coercion to integer</a></li>
<li><a href="#DEP0165">DEP0165: <code>--trace-atomics-wait</code></a></li>
<li><a href="#DEP0166">DEP0166: Double slashes in imports and exports targets</a></li>
<li><a href="#DEP0167">DEP0167: Weak <code>DiffieHellmanGroup</code> instances (<code>modp1</code>, <code>modp2</code>, <code>modp5</code>)</a></li>
<li><a href="#DEP0168">DEP0168: Unhandled exception in Node-API callbacks</a></li>
<li><a href="#DEP0169">DEP0169: Insecure url.parse()</a></li>
<li><a href="#DEP0170">DEP0170: Invalid port when using <code>url.parse()</code></a></li>
<li><a href="#DEP0171">DEP0171: Setters for <code>http.IncomingMessage</code> headers and trailers</a></li>
<li><a href="#DEP0172">DEP0172: The <code>asyncResource</code> property of <code>AsyncResource</code> bound functions</a></li>
<li><a href="#DEP0173">DEP0173: the <code>assert.CallTracker</code> class</a></li>
<li><a href="#DEP0174">DEP0174: calling <code>promisify</code> on a function that returns a <code>Promise</code></a></li>
<li><a href="#DEP0175">DEP0175: <code>util.toUSVString</code></a></li>
<li><a href="#DEP0176">DEP0176: <code>fs.F_OK</code>, <code>fs.R_OK</code>, <code>fs.W_OK</code>, <code>fs.X_OK</code></a></li>
<li><a href="#DEP0177">DEP0177: <code>util.types.isWebAssemblyCompiledModule</code></a></li>
<li><a href="#DEP0178">DEP0178: <code>dirent.path</code></a></li>
<li><a href="#DEP0179">DEP0179: <code>Hash</code> constructor</a></li>
<li><a href="#DEP0180">DEP0180: <code>fs.Stats</code> constructor</a></li>
<li><a href="#DEP0181">DEP0181: <code>Hmac</code> constructor</a></li>
<li><a href="#DEP0182">DEP0182: Short GCM authentication tags without explicit <code>authTagLength</code></a></li>
<li><a href="#DEP0183">DEP0183: OpenSSL engine-based APIs</a></li>
<li><a href="#DEP0184">DEP0184: Instantiating <code>node:zlib</code> classes without <code>new</code></a></li>
<li><a href="#DEP0185">DEP0185: Instantiating <code>node:repl</code> classes without <code>new</code></a></li>
<li><a href="#DEP0187">DEP0187: Passing invalid argument types to <code>fs.existsSync</code></a></li>
<li><a href="#DEP0188">DEP0188: <code>process.features.ipv6</code> and <code>process.features.uv</code></a></li>
<li><a href="#DEP0189">DEP0189: <code>process.features.tls_*</code></a></li>
</ul>
</li>
</ul>
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<details role="navigation" id="toc" open><summary>Table of contents</summary><ul>
<li><a href="#deprecated-apis">Deprecated APIs</a>
<ul>
<li><a href="#revoking-deprecations">Revoking deprecations</a></li>
<li><a href="#list-of-deprecated-apis">List of deprecated APIs</a>
<ul>
<li><a href="#DEP0001">DEP0001: <code>http.OutgoingMessage.prototype.flush</code></a></li>
<li><a href="#DEP0002">DEP0002: <code>require('_linklist')</code></a></li>
<li><a href="#DEP0003">DEP0003: <code>_writableState.buffer</code></a></li>
<li><a href="#DEP0004">DEP0004: <code>CryptoStream.prototype.readyState</code></a></li>
<li><a href="#DEP0005">DEP0005: <code>Buffer()</code> constructor</a></li>
<li><a href="#DEP0006">DEP0006: <code>child_process</code> <code>options.customFds</code></a></li>
<li><a href="#DEP0007">DEP0007: Replace <code>cluster</code> <code>worker.suicide</code> with <code>worker.exitedAfterDisconnect</code></a></li>
<li><a href="#DEP0008">DEP0008: <code>require('node:constants')</code></a></li>
<li><a href="#DEP0009">DEP0009: <code>crypto.pbkdf2</code> without digest</a></li>
<li><a href="#DEP0010">DEP0010: <code>crypto.createCredentials</code></a></li>
<li><a href="#DEP0011">DEP0011: <code>crypto.Credentials</code></a></li>
<li><a href="#DEP0012">DEP0012: <code>Domain.dispose</code></a></li>
<li><a href="#DEP0013">DEP0013: <code>fs</code> asynchronous function without callback</a></li>
<li><a href="#DEP0014">DEP0014: <code>fs.read</code> legacy String interface</a></li>
<li><a href="#DEP0015">DEP0015: <code>fs.readSync</code> legacy String interface</a></li>
<li><a href="#DEP0016">DEP0016: <code>GLOBAL</code>/<code>root</code></a></li>
<li><a href="#DEP0017">DEP0017: <code>Intl.v8BreakIterator</code></a></li>
<li><a href="#DEP0018">DEP0018: Unhandled promise rejections</a></li>
<li><a href="#DEP0019">DEP0019: <code>require('.')</code> resolved outside directory</a></li>
<li><a href="#DEP0020">DEP0020: <code>Server.connections</code></a></li>
<li><a href="#DEP0021">DEP0021: <code>Server.listenFD</code></a></li>
<li><a href="#DEP0022">DEP0022: <code>os.tmpDir()</code></a></li>
<li><a href="#DEP0023">DEP0023: <code>os.getNetworkInterfaces()</code></a></li>
<li><a href="#DEP0024">DEP0024: <code>REPLServer.prototype.convertToContext()</code></a></li>
<li><a href="#DEP0025">DEP0025: <code>require('node:sys')</code></a></li>
<li><a href="#DEP0026">DEP0026: <code>util.print()</code></a></li>
<li><a href="#DEP0027">DEP0027: <code>util.puts()</code></a></li>
<li><a href="#DEP0028">DEP0028: <code>util.debug()</code></a></li>
<li><a href="#DEP0029">DEP0029: <code>util.error()</code></a></li>
<li><a href="#DEP0030">DEP0030: <code>SlowBuffer</code></a></li>
<li><a href="#DEP0031">DEP0031: <code>ecdh.setPublicKey()</code></a></li>
<li><a href="#DEP0032">DEP0032: <code>node:domain</code> module</a></li>
<li><a href="#DEP0033">DEP0033: <code>EventEmitter.listenerCount()</code></a></li>
<li><a href="#DEP0034">DEP0034: <code>fs.exists(path, callback)</code></a></li>
<li><a href="#DEP0035">DEP0035: <code>fs.lchmod(path, mode, callback)</code></a></li>
<li><a href="#DEP0036">DEP0036: <code>fs.lchmodSync(path, mode)</code></a></li>
<li><a href="#DEP0037">DEP0037: <code>fs.lchown(path, uid, gid, callback)</code></a></li>
<li><a href="#DEP0038">DEP0038: <code>fs.lchownSync(path, uid, gid)</code></a></li>
<li><a href="#DEP0039">DEP0039: <code>require.extensions</code></a></li>
<li><a href="#DEP0040">DEP0040: <code>node:punycode</code> module</a></li>
<li><a href="#DEP0041">DEP0041: <code>NODE_REPL_HISTORY_FILE</code> environment variable</a></li>
<li><a href="#DEP0042">DEP0042: <code>tls.CryptoStream</code></a></li>
<li><a href="#DEP0043">DEP0043: <code>tls.SecurePair</code></a></li>
<li><a href="#DEP0044">DEP0044: <code>util.isArray()</code></a></li>
<li><a href="#DEP0045">DEP0045: <code>util.isBoolean()</code></a></li>
<li><a href="#DEP0046">DEP0046: <code>util.isBuffer()</code></a></li>
<li><a href="#DEP0047">DEP0047: <code>util.isDate()</code></a></li>
<li><a href="#DEP0048">DEP0048: <code>util.isError()</code></a></li>
<li><a href="#DEP0049">DEP0049: <code>util.isFunction()</code></a></li>
<li><a href="#DEP0050">DEP0050: <code>util.isNull()</code></a></li>
<li><a href="#DEP0051">DEP0051: <code>util.isNullOrUndefined()</code></a></li>
<li><a href="#DEP0052">DEP0052: <code>util.isNumber()</code></a></li>
<li><a href="#DEP0053">DEP0053: <code>util.isObject()</code></a></li>
<li><a href="#DEP0054">DEP0054: <code>util.isPrimitive()</code></a></li>
<li><a href="#DEP0055">DEP0055: <code>util.isRegExp()</code></a></li>
<li><a href="#DEP0056">DEP0056: <code>util.isString()</code></a></li>
<li><a href="#DEP0057">DEP0057: <code>util.isSymbol()</code></a></li>
<li><a href="#DEP0058">DEP0058: <code>util.isUndefined()</code></a></li>
<li><a href="#DEP0059">DEP0059: <code>util.log()</code></a></li>
<li><a href="#DEP0060">DEP0060: <code>util._extend()</code></a></li>
<li><a href="#DEP0061">DEP0061: <code>fs.SyncWriteStream</code></a></li>
<li><a href="#DEP0062">DEP0062: <code>node --debug</code></a></li>
<li><a href="#DEP0063">DEP0063: <code>ServerResponse.prototype.writeHeader()</code></a></li>
<li><a href="#DEP0064">DEP0064: <code>tls.createSecurePair()</code></a></li>
<li><a href="#DEP0065">DEP0065: <code>repl.REPL_MODE_MAGIC</code> and <code>NODE_REPL_MODE=magic</code></a></li>
<li><a href="#DEP0066">DEP0066: <code>OutgoingMessage.prototype._headers, OutgoingMessage.prototype._headerNames</code></a></li>
<li><a href="#DEP0067">DEP0067: <code>OutgoingMessage.prototype._renderHeaders</code></a></li>
<li><a href="#DEP0068">DEP0068: <code>node debug</code></a></li>
<li><a href="#DEP0069">DEP0069: <code>vm.runInDebugContext(string)</code></a></li>
<li><a href="#DEP0070">DEP0070: <code>async_hooks.currentId()</code></a></li>
<li><a href="#DEP0071">DEP0071: <code>async_hooks.triggerId()</code></a></li>
<li><a href="#DEP0072">DEP0072: <code>async_hooks.AsyncResource.triggerId()</code></a></li>
<li><a href="#DEP0073">DEP0073: Several internal properties of <code>net.Server</code></a></li>
<li><a href="#DEP0074">DEP0074: <code>REPLServer.bufferedCommand</code></a></li>
<li><a href="#DEP0075">DEP0075: <code>REPLServer.parseREPLKeyword()</code></a></li>
<li><a href="#DEP0076">DEP0076: <code>tls.parseCertString()</code></a></li>
<li><a href="#DEP0077">DEP0077: <code>Module._debug()</code></a></li>
<li><a href="#DEP0078">DEP0078: <code>REPLServer.turnOffEditorMode()</code></a></li>
<li><a href="#DEP0079">DEP0079: Custom inspection function on objects via <code>.inspect()</code></a></li>
<li><a href="#DEP0080">DEP0080: <code>path._makeLong()</code></a></li>
<li><a href="#DEP0081">DEP0081: <code>fs.truncate()</code> using a file descriptor</a></li>
<li><a href="#DEP0082">DEP0082: <code>REPLServer.prototype.memory()</code></a></li>
<li><a href="#DEP0083">DEP0083: Disabling ECDH by setting <code>ecdhCurve</code> to <code>false</code></a></li>
<li><a href="#DEP0084">DEP0084: requiring bundled internal dependencies</a></li>
<li><a href="#DEP0085">DEP0085: AsyncHooks sensitive API</a></li>
<li><a href="#DEP0086">DEP0086: Remove <code>runInAsyncIdScope</code></a></li>
<li><a href="#DEP0089">DEP0089: <code>require('node:assert')</code></a></li>
<li><a href="#DEP0090">DEP0090: Invalid GCM authentication tag lengths</a></li>
<li><a href="#DEP0091">DEP0091: <code>crypto.DEFAULT_ENCODING</code></a></li>
<li><a href="#DEP0092">DEP0092: Top-level <code>this</code> bound to <code>module.exports</code></a></li>
<li><a href="#DEP0093">DEP0093: <code>crypto.fips</code> is deprecated and replaced</a></li>
<li><a href="#DEP0094">DEP0094: Using <code>assert.fail()</code> with more than one argument</a></li>
<li><a href="#DEP0095">DEP0095: <code>timers.enroll()</code></a></li>
<li><a href="#DEP0096">DEP0096: <code>timers.unenroll()</code></a></li>
<li><a href="#DEP0097">DEP0097: <code>MakeCallback</code> with <code>domain</code> property</a></li>
<li><a href="#DEP0098">DEP0098: AsyncHooks embedder <code>AsyncResource.emitBefore</code> and <code>AsyncResource.emitAfter</code> APIs</a></li>
<li><a href="#DEP0099">DEP0099: Async context-unaware <code>node::MakeCallback</code> C++ APIs</a></li>
<li><a href="#DEP0100">DEP0100: <code>process.assert()</code></a></li>
<li><a href="#DEP0101">DEP0101: <code>--with-lttng</code></a></li>
<li><a href="#DEP0102">DEP0102: Using <code>noAssert</code> in <code>Buffer#(read|write)</code> operations</a></li>
<li><a href="#DEP0103">DEP0103: <code>process.binding('util').is[...]</code> typechecks</a></li>
<li><a href="#DEP0104">DEP0104: <code>process.env</code> string coercion</a></li>
<li><a href="#DEP0105">DEP0105: <code>decipher.finaltol</code></a></li>
<li><a href="#DEP0106">DEP0106: <code>crypto.createCipher</code> and <code>crypto.createDecipher</code></a></li>
<li><a href="#DEP0107">DEP0107: <code>tls.convertNPNProtocols()</code></a></li>
<li><a href="#DEP0108">DEP0108: <code>zlib.bytesRead</code></a></li>
<li><a href="#DEP0109">DEP0109: <code>http</code>, <code>https</code>, and <code>tls</code> support for invalid URLs</a></li>
<li><a href="#DEP0110">DEP0110: <code>vm.Script</code> cached data</a></li>
<li><a href="#DEP0111">DEP0111: <code>process.binding()</code></a></li>
<li><a href="#DEP0112">DEP0112: <code>dgram</code> private APIs</a></li>
<li><a href="#DEP0113">DEP0113: <code>Cipher.setAuthTag()</code>, <code>Decipher.getAuthTag()</code></a></li>
<li><a href="#DEP0114">DEP0114: <code>crypto._toBuf()</code></a></li>
<li><a href="#DEP0115">DEP0115: <code>crypto.prng()</code>, <code>crypto.pseudoRandomBytes()</code>, <code>crypto.rng()</code></a></li>
<li><a href="#DEP0116">DEP0116: Legacy URL API</a></li>
<li><a href="#DEP0117">DEP0117: Native crypto handles</a></li>
<li><a href="#DEP0118">DEP0118: <code>dns.lookup()</code> support for a falsy host name</a></li>
<li><a href="#DEP0119">DEP0119: <code>process.binding('uv').errname()</code> private API</a></li>
<li><a href="#DEP0120">DEP0120: Windows Performance Counter support</a></li>
<li><a href="#DEP0121">DEP0121: <code>net._setSimultaneousAccepts()</code></a></li>
<li><a href="#DEP0122">DEP0122: <code>tls</code> <code>Server.prototype.setOptions()</code></a></li>
<li><a href="#DEP0123">DEP0123: setting the TLS ServerName to an IP address</a></li>
<li><a href="#DEP0124">DEP0124: using <code>REPLServer.rli</code></a></li>
<li><a href="#DEP0125">DEP0125: <code>require('node:_stream_wrap')</code></a></li>
<li><a href="#DEP0126">DEP0126: <code>timers.active()</code></a></li>
<li><a href="#DEP0127">DEP0127: <code>timers._unrefActive()</code></a></li>
<li><a href="#DEP0128">DEP0128: modules with an invalid <code>main</code> entry and an <code>index.js</code> file</a></li>
<li><a href="#DEP0129">DEP0129: <code>ChildProcess._channel</code></a></li>
<li><a href="#DEP0130">DEP0130: <code>Module.createRequireFromPath()</code></a></li>
<li><a href="#DEP0131">DEP0131: Legacy HTTP parser</a></li>
<li><a href="#DEP0132">DEP0132: <code>worker.terminate()</code> with callback</a></li>
<li><a href="#DEP0133">DEP0133: <code>http</code> <code>connection</code></a></li>
<li><a href="#DEP0134">DEP0134: <code>process._tickCallback</code></a></li>
<li><a href="#DEP0135">DEP0135: <code>WriteStream.open()</code> and <code>ReadStream.open()</code> are internal</a></li>
<li><a href="#DEP0136">DEP0136: <code>http</code> <code>finished</code></a></li>
<li><a href="#DEP0137">DEP0137: Closing fs.FileHandle on garbage collection</a></li>
<li><a href="#DEP0138">DEP0138: <code>process.mainModule</code></a></li>
<li><a href="#DEP0139">DEP0139: <code>process.umask()</code> with no arguments</a></li>
<li><a href="#DEP0140">DEP0140: Use <code>request.destroy()</code> instead of <code>request.abort()</code></a></li>
<li><a href="#DEP0141">DEP0141: <code>repl.inputStream</code> and <code>repl.outputStream</code></a></li>
<li><a href="#DEP0142">DEP0142: <code>repl._builtinLibs</code></a></li>
<li><a href="#DEP0143">DEP0143: <code>Transform._transformState</code></a></li>
<li><a href="#DEP0144">DEP0144: <code>module.parent</code></a></li>
<li><a href="#DEP0145">DEP0145: <code>socket.bufferSize</code></a></li>
<li><a href="#DEP0146">DEP0146: <code>new crypto.Certificate()</code></a></li>
<li><a href="#DEP0147">DEP0147: <code>fs.rmdir(path, { recursive: true })</code></a></li>
<li><a href="#DEP0148">DEP0148: Folder mappings in <code>"exports"</code> (trailing <code>"/"</code>)</a></li>
<li><a href="#DEP0149">DEP0149: <code>http.IncomingMessage#connection</code></a></li>
<li><a href="#DEP0150">DEP0150: Changing the value of <code>process.config</code></a></li>
<li><a href="#DEP0151">DEP0151: Main index lookup and extension searching</a></li>
<li><a href="#DEP0152">DEP0152: Extension PerformanceEntry properties</a></li>
<li><a href="#DEP0153">DEP0153: <code>dns.lookup</code> and <code>dnsPromises.lookup</code> options type coercion</a></li>
<li><a href="#DEP0154">DEP0154: RSA-PSS generate key pair options</a></li>
<li><a href="#DEP0155">DEP0155: Trailing slashes in pattern specifier resolutions</a></li>
<li><a href="#DEP0156">DEP0156: <code>.aborted</code> property and <code>'abort'</code>, <code>'aborted'</code> event in <code>http</code></a></li>
<li><a href="#DEP0157">DEP0157: Thenable support in streams</a></li>
<li><a href="#DEP0158">DEP0158: <code>buffer.slice(start, end)</code></a></li>
<li><a href="#DEP0159">DEP0159: <code>ERR_INVALID_CALLBACK</code></a></li>
<li><a href="#DEP0160">DEP0160: <code>process.on('multipleResolves', handler)</code></a></li>
<li><a href="#DEP0161">DEP0161: <code>process._getActiveRequests()</code> and <code>process._getActiveHandles()</code></a></li>
<li><a href="#DEP0162">DEP0162: <code>fs.write()</code>, <code>fs.writeFileSync()</code> coercion to string</a></li>
<li><a href="#DEP0163">DEP0163: <code>channel.subscribe(onMessage)</code>, <code>channel.unsubscribe(onMessage)</code></a></li>
<li><a href="#DEP0164">DEP0164: <code>process.exit(code)</code>, <code>process.exitCode</code> coercion to integer</a></li>
<li><a href="#DEP0165">DEP0165: <code>--trace-atomics-wait</code></a></li>
<li><a href="#DEP0166">DEP0166: Double slashes in imports and exports targets</a></li>
<li><a href="#DEP0167">DEP0167: Weak <code>DiffieHellmanGroup</code> instances (<code>modp1</code>, <code>modp2</code>, <code>modp5</code>)</a></li>
<li><a href="#DEP0168">DEP0168: Unhandled exception in Node-API callbacks</a></li>
<li><a href="#DEP0169">DEP0169: Insecure url.parse()</a></li>
<li><a href="#DEP0170">DEP0170: Invalid port when using <code>url.parse()</code></a></li>
<li><a href="#DEP0171">DEP0171: Setters for <code>http.IncomingMessage</code> headers and trailers</a></li>
<li><a href="#DEP0172">DEP0172: The <code>asyncResource</code> property of <code>AsyncResource</code> bound functions</a></li>
<li><a href="#DEP0173">DEP0173: the <code>assert.CallTracker</code> class</a></li>
<li><a href="#DEP0174">DEP0174: calling <code>promisify</code> on a function that returns a <code>Promise</code></a></li>
<li><a href="#DEP0175">DEP0175: <code>util.toUSVString</code></a></li>
<li><a href="#DEP0176">DEP0176: <code>fs.F_OK</code>, <code>fs.R_OK</code>, <code>fs.W_OK</code>, <code>fs.X_OK</code></a></li>
<li><a href="#DEP0177">DEP0177: <code>util.types.isWebAssemblyCompiledModule</code></a></li>
<li><a href="#DEP0178">DEP0178: <code>dirent.path</code></a></li>
<li><a href="#DEP0179">DEP0179: <code>Hash</code> constructor</a></li>
<li><a href="#DEP0180">DEP0180: <code>fs.Stats</code> constructor</a></li>
<li><a href="#DEP0181">DEP0181: <code>Hmac</code> constructor</a></li>
<li><a href="#DEP0182">DEP0182: Short GCM authentication tags without explicit <code>authTagLength</code></a></li>
<li><a href="#DEP0183">DEP0183: OpenSSL engine-based APIs</a></li>
<li><a href="#DEP0184">DEP0184: Instantiating <code>node:zlib</code> classes without <code>new</code></a></li>
<li><a href="#DEP0185">DEP0185: Instantiating <code>node:repl</code> classes without <code>new</code></a></li>
<li><a href="#DEP0187">DEP0187: Passing invalid argument types to <code>fs.existsSync</code></a></li>
<li><a href="#DEP0188">DEP0188: <code>process.features.ipv6</code> and <code>process.features.uv</code></a></li>
<li><a href="#DEP0189">DEP0189: <code>process.features.tls_*</code></a></li>
</ul>
</li>
</ul>
</li>
</ul></details>
<div role="main" id="apicontent">
<h2>Deprecated APIs<span><a class="mark" href="#deprecated-apis" id="deprecated-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_deprecated_apis"></a></h2>
<p>Node.js APIs might be deprecated for any of the following reasons:</p>
<ul>
<li>Use of the API is unsafe.</li>
<li>An improved alternative API is available.</li>
<li>Breaking changes to the API are expected in a future major release.</li>
</ul>
<p>Node.js uses four kinds of deprecations:</p>
<ul>
<li>Documentation-only</li>
<li>Application (non-<code>node_modules</code> code only)</li>
<li>Runtime (all code)</li>
<li>End-of-Life</li>
</ul>
<p>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 <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a> flag (or its alternative,
<code>NODE_PENDING_DEPRECATION=1</code> environment variable), similarly to Runtime
deprecations below. Documentation-only deprecations that support that flag
are explicitly labeled as such in the
<a href="#list-of-deprecated-apis">list of Deprecated APIs</a>.</p>
<p>An Application deprecation for only non-<code>node_modules</code> code will, by default,
generate a process warning that will be printed to <code>stderr</code> the first time
the deprecated API is used in code that's not loaded from <code>node_modules</code>.
When the <a href="cli.html#--throw-deprecation"><code>--throw-deprecation</code></a> command-line flag is used, a Runtime
deprecation will cause an error to be thrown. When
<a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a> is used, warnings will also be emitted for
code loaded from <code>node_modules</code>.</p>
<p>A runtime deprecation for all code is similar to the runtime deprecation
for non-<code>node_modules</code> code, except that it also emits a warning for
code loaded from <code>node_modules</code>.</p>
<p>An End-of-Life deprecation is used when functionality is or will soon be removed
from Node.js.</p>
<section><h3>Revoking deprecations<span><a class="mark" href="#revoking-deprecations" id="revoking-deprecations">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_revoking_deprecations"></a></h3>
<p>Occasionally, the deprecation of an API might be reversed. In such situations,
this document will be updated with information relevant to the decision.
However, the deprecation identifier will not be modified.</p>
</section><section><h3>List of deprecated APIs<span><a class="mark" href="#list-of-deprecated-apis" id="list-of-deprecated-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_list_of_deprecated_apis"></a></h3>
<h4 id="DEP0001">DEP0001: <code>http.OutgoingMessage.prototype.flush</code><span><a class="mark" href="#dep0001-httpoutgoingmessageprototypeflush" id="dep0001-httpoutgoingmessageprototypeflush">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0001_http_outgoingmessage_prototype_flush"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v1.6.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>OutgoingMessage.prototype.flush()</code> has been removed. Use
<code>OutgoingMessage.prototype.flushHeaders()</code> instead.</p>
<h4 id="DEP0002">DEP0002: <code>require('_linklist')</code><span><a class="mark" href="#dep0002-require_linklist" id="dep0002-require_linklist">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0002_require_linklist"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v5.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>_linklist</code> module is deprecated. Please use a userland alternative.</p>
<h4 id="DEP0003">DEP0003: <code>_writableState.buffer</code><span><a class="mark" href="#dep0003-_writablestatebuffer" id="dep0003-_writablestatebuffer">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0003_writablestate_buffer"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.15</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>_writableState.buffer</code> has been removed. Use <code>_writableState.getBuffer()</code>
instead.</p>
<h4 id="DEP0004">DEP0004: <code>CryptoStream.prototype.readyState</code><span><a class="mark" href="#dep0004-cryptostreamprototypereadystate" id="dep0004-cryptostreamprototypereadystate">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0004_cryptostream_prototype_readystate"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.4.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>CryptoStream.prototype.readyState</code> property was removed.</p>
<h4 id="DEP0005">DEP0005: <code>Buffer()</code> constructor<span><a class="mark" href="#dep0005-buffer-constructor" id="dep0005-buffer-constructor">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0005_buffer_constructor"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Application (non-<code>node_modules</code> code only)</p>
<p>The <code>Buffer()</code> function and <code>new Buffer()</code> constructor are deprecated due to
API usability issues that can lead to accidental security issues.</p>
<p>As an alternative, use one of the following methods of constructing <code>Buffer</code>
objects:</p>
<ul>
<li><a href="buffer.html#static-method-bufferallocsize-fill-encoding"><code>Buffer.alloc(size[, fill[, encoding]])</code></a>: Create a <code>Buffer</code> with
<em>initialized</em> memory.</li>
<li><a href="buffer.html#static-method-bufferallocunsafesize"><code>Buffer.allocUnsafe(size)</code></a>: Create a <code>Buffer</code> with
<em>uninitialized</em> memory.</li>
<li><a href="buffer.html#static-method-bufferallocunsafeslowsize"><code>Buffer.allocUnsafeSlow(size)</code></a>: Create a <code>Buffer</code> with <em>uninitialized</em>
memory.</li>
<li><a href="buffer.html#static-method-bufferfromarray"><code>Buffer.from(array)</code></a>: Create a <code>Buffer</code> with a copy of <code>array</code></li>
<li><a href="buffer.html#static-method-bufferfromarraybuffer-byteoffset-length"><code>Buffer.from(arrayBuffer[, byteOffset[, length]])</code></a> -
Create a <code>Buffer</code> that wraps the given <code>arrayBuffer</code>.</li>
<li><a href="buffer.html#static-method-bufferfrombuffer"><code>Buffer.from(buffer)</code></a>: Create a <code>Buffer</code> that copies <code>buffer</code>.</li>
<li><a href="buffer.html#static-method-bufferfromstring-encoding"><code>Buffer.from(string[, encoding])</code></a>: Create a <code>Buffer</code>
that copies <code>string</code>.</li>
</ul>
<p>Without <code>--pending-deprecation</code>, runtime warnings occur only for code not in
<code>node_modules</code>. This means there will not be deprecation warnings for
<code>Buffer()</code> usage in dependencies. With <code>--pending-deprecation</code>, a runtime
warning results no matter where the <code>Buffer()</code> usage occurs.</p>
<h4 id="DEP0006">DEP0006: <code>child_process</code> <code>options.customFds</code><span><a class="mark" href="#dep0006-child_process-optionscustomfds" id="dep0006-child_process-optionscustomfds">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0006_child_process_options_customfds"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.14</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v0.5.10</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Within the <a href="child_process.html"><code>child_process</code></a> module's <code>spawn()</code>, <code>fork()</code>, and <code>exec()</code>
methods, the <code>options.customFds</code> option is deprecated. The <code>options.stdio</code>
option should be used instead.</p>
<h4 id="DEP0007">DEP0007: Replace <code>cluster</code> <code>worker.suicide</code> with <code>worker.exitedAfterDisconnect</code><span><a class="mark" href="#dep0007-replace-cluster-workersuicide-with-workerexitedafterdisconnect" id="dep0007-replace-cluster-workersuicide-with-workerexitedafterdisconnect">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0007_replace_cluster_worker_suicide_with_worker_exitedafterdisconnect"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>In an earlier version of the Node.js <code>cluster</code>, a boolean property with the name
<code>suicide</code> was added to the <code>Worker</code> object. The intent of this property was to
provide an indication of how and why the <code>Worker</code> instance exited. In Node.js
6.0.0, the old property was deprecated and replaced with a new
<a href="cluster.html#workerexitedafterdisconnect"><code>worker.exitedAfterDisconnect</code></a> property. The old property name did not
precisely describe the actual semantics and was unnecessarily emotion-laden.</p>
<h4 id="DEP0008">DEP0008: <code>require('node:constants')</code><span><a class="mark" href="#dep0008-requirenodeconstants" id="dep0008-requirenodeconstants">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0008_require_node_constants"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.3.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>node:constants</code> module is deprecated. When requiring access to constants
relevant to specific Node.js builtin modules, developers should instead refer
to the <code>constants</code> property exposed by the relevant module. For instance,
<code>require('node:fs').constants</code> and <code>require('node:os').constants</code>.</p>
<h4 id="DEP0009">DEP0009: <code>crypto.pbkdf2</code> without digest<span><a class="mark" href="#dep0009-cryptopbkdf2-without-digest" id="dep0009-cryptopbkdf2-without-digest">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0009_crypto_pbkdf2_without_digest"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>End-of-Life (for <code>digest === null</code>).</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation (for <code>digest === null</code>).</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>End-of-Life (for <code>digest === undefined</code>).</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Runtime deprecation (for <code>digest === undefined</code>).</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Use of the <a href="crypto.html#cryptopbkdf2password-salt-iterations-keylen-digest-callback"><code>crypto.pbkdf2()</code></a> API without specifying a digest was deprecated
in Node.js 6.0 because the method defaulted to using the non-recommended
<code>'SHA1'</code> digest. Previously, a deprecation warning was printed. Starting in
Node.js 8.0.0, calling <code>crypto.pbkdf2()</code> or <code>crypto.pbkdf2Sync()</code> with
<code>digest</code> set to <code>undefined</code> will throw a <code>TypeError</code>.</p>
<p>Beginning in Node.js v11.0.0, calling these functions with <code>digest</code> set to
<code>null</code> would print a deprecation warning to align with the behavior when <code>digest</code>
is <code>undefined</code>.</p>
<p>Now, however, passing either <code>undefined</code> or <code>null</code> will throw a <code>TypeError</code>.</p>
<h4 id="DEP0010">DEP0010: <code>crypto.createCredentials</code><span><a class="mark" href="#dep0010-cryptocreatecredentials" id="dep0010-cryptocreatecredentials">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0010_crypto_createcredentials"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.13</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>crypto.createCredentials()</code> API was removed. Please use
<a href="tls.html#tlscreatesecurecontextoptions"><code>tls.createSecureContext()</code></a> instead.</p>
<h4 id="DEP0011">DEP0011: <code>crypto.Credentials</code><span><a class="mark" href="#dep0011-cryptocredentials" id="dep0011-cryptocredentials">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0011_crypto_credentials"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.13</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>crypto.Credentials</code> class was removed. Please use <a href="tls.html#tlscreatesecurecontextoptions"><code>tls.SecureContext</code></a>
instead.</p>
<h4 id="DEP0012">DEP0012: <code>Domain.dispose</code><span><a class="mark" href="#dep0012-domaindispose" id="dep0012-domaindispose">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0012_domain_dispose"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.7</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>Domain.dispose()</code> has been removed. Recover from failed I/O actions
explicitly via error event handlers set on the domain instead.</p>
<h4 id="DEP0013">DEP0013: <code>fs</code> asynchronous function without callback<span><a class="mark" href="#dep0013-fs-asynchronous-function-without-callback" id="dep0013-fs-asynchronous-function-without-callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0013_fs_asynchronous_function_without_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Calling an asynchronous function without a callback throws a <code>TypeError</code>
in Node.js 10.0.0 onwards. See <a href="https://github.com/nodejs/node/pull/12562">https://github.com/nodejs/node/pull/12562</a>.</p>
<h4 id="DEP0014">DEP0014: <code>fs.read</code> legacy String interface<span><a class="mark" href="#dep0014-fsread-legacy-string-interface" id="dep0014-fsread-legacy-string-interface">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0014_fs_read_legacy_string_interface"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.1.96</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <a href="fs.html#fsreadfd-buffer-offset-length-position-callback"><code>fs.read()</code></a> legacy <code>String</code> interface is deprecated. Use the <code>Buffer</code>
API as mentioned in the documentation instead.</p>
<h4 id="DEP0015">DEP0015: <code>fs.readSync</code> legacy String interface<span><a class="mark" href="#dep0015-fsreadsync-legacy-string-interface" id="dep0015-fsreadsync-legacy-string-interface">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0015_fs_readsync_legacy_string_interface"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.1.96</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <a href="fs.html#fsreadsyncfd-buffer-offset-length-position"><code>fs.readSync()</code></a> legacy <code>String</code> interface is deprecated. Use the
<code>Buffer</code> API as mentioned in the documentation instead.</p>
<h4 id="DEP0016">DEP0016: <code>GLOBAL</code>/<code>root</code><span><a class="mark" href="#dep0016-globalroot" id="dep0016-globalroot">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0016_global_root"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>GLOBAL</code> and <code>root</code> aliases for the <code>global</code> property were deprecated
in Node.js 6.0.0 and have since been removed.</p>
<h4 id="DEP0017">DEP0017: <code>Intl.v8BreakIterator</code><span><a class="mark" href="#dep0017-intlv8breakiterator" id="dep0017-intlv8breakiterator">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0017_intl_v8breakiterator"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>Intl.v8BreakIterator</code> was a non-standard extension and has been removed.
See <a href="https://github.com/tc39/proposal-intl-segmenter"><code>Intl.Segmenter</code></a>.</p>
<h4 id="DEP0018">DEP0018: Unhandled promise rejections<span><a class="mark" href="#dep0018-unhandled-promise-rejections" id="dep0018-unhandled-promise-rejections">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0018_unhandled_promise_rejections"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Unhandled promise rejections are deprecated. By default, promise rejections
that are not handled terminate the Node.js process with a non-zero exit
code. To change the way Node.js treats unhandled rejections, use the
<a href="cli.html#--unhandled-rejectionsmode"><code>--unhandled-rejections</code></a> command-line option.</p>
<h4 id="DEP0019">DEP0019: <code>require('.')</code> resolved outside directory<span><a class="mark" href="#dep0019-require-resolved-outside-directory" id="dep0019-require-resolved-outside-directory">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0019_require_resolved_outside_directory"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Removed functionality.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v1.8.1</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>In certain cases, <code>require('.')</code> could resolve outside the package directory.
This behavior has been removed.</p>
<h4 id="DEP0020">DEP0020: <code>Server.connections</code><span><a class="mark" href="#dep0020-serverconnections" id="dep0020-serverconnections">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0020_server_connections"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>Server.connections has been removed.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.9.7</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>Server.connections</code> property was deprecated in Node.js v0.9.7 and has
been removed. Please use the <a href="net.html#servergetconnectionscallback"><code>Server.getConnections()</code></a> method instead.</p>
<h4 id="DEP0021">DEP0021: <code>Server.listenFD</code><span><a class="mark" href="#dep0021-serverlistenfd" id="dep0021-serverlistenfd">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0021_server_listenfd"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.7.12</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>Server.listenFD()</code> method was deprecated and removed. Please use
<a href="net.html#serverlistenhandle-backlog-callback"><code>Server.listen({fd: <number>})</code></a> instead.</p>
<h4 id="DEP0022">DEP0022: <code>os.tmpDir()</code><span><a class="mark" href="#dep0022-ostmpdir" id="dep0022-ostmpdir">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0022_os_tmpdir"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>os.tmpDir()</code> API was deprecated in Node.js 7.0.0 and has since been
removed. Please use <a href="os.html#ostmpdir"><code>os.tmpdir()</code></a> instead.</p>
<h4 id="DEP0023">DEP0023: <code>os.getNetworkInterfaces()</code><span><a class="mark" href="#dep0023-osgetnetworkinterfaces" id="dep0023-osgetnetworkinterfaces">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0023_os_getnetworkinterfaces"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.6.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>os.getNetworkInterfaces()</code> method is deprecated. Please use the
<a href="os.html#osnetworkinterfaces"><code>os.networkInterfaces()</code></a> method instead.</p>
<h4 id="DEP0024">DEP0024: <code>REPLServer.prototype.convertToContext()</code><span><a class="mark" href="#dep0024-replserverprototypeconverttocontext" id="dep0024-replserverprototypeconverttocontext">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0024_replserver_prototype_converttocontext"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>REPLServer.prototype.convertToContext()</code> API has been removed.</p>
<h4 id="DEP0025">DEP0025: <code>require('node:sys')</code><span><a class="mark" href="#dep0025-requirenodesys" id="dep0025-requirenodesys">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0025_require_node_sys"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v1.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>node:sys</code> module is deprecated. Please use the <a href="util.html"><code>util</code></a> module instead.</p>
<h4 id="DEP0026">DEP0026: <code>util.print()</code><span><a class="mark" href="#dep0026-utilprint" id="dep0026-utilprint">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0026_util_print"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>util.print()</code> has been removed. Please use <a href="console.html#consolelogdata-args"><code>console.log()</code></a> instead.</p>
<h4 id="DEP0027">DEP0027: <code>util.puts()</code><span><a class="mark" href="#dep0027-utilputs" id="dep0027-utilputs">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0027_util_puts"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>util.puts()</code> has been removed. Please use <a href="console.html#consolelogdata-args"><code>console.log()</code></a> instead.</p>
<h4 id="DEP0028">DEP0028: <code>util.debug()</code><span><a class="mark" href="#dep0028-utildebug" id="dep0028-utildebug">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0028_util_debug"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>util.debug()</code> has been removed. Please use <a href="console.html#consoleerrordata-args"><code>console.error()</code></a> instead.</p>
<h4 id="DEP0029">DEP0029: <code>util.error()</code><span><a class="mark" href="#dep0029-utilerror" id="dep0029-utilerror">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0029_util_error"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>util.error()</code> has been removed. Please use <a href="console.html#consoleerrordata-args"><code>console.error()</code></a> instead.</p>
<h4 id="DEP0030">DEP0030: <code>SlowBuffer</code><span><a class="mark" href="#dep0030-slowbuffer" id="dep0030-slowbuffer">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0030_slowbuffer"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="buffer.html#class-slowbuffer"><code>SlowBuffer</code></a> class is deprecated. Please use
<a href="buffer.html#static-method-bufferallocunsafeslowsize"><code>Buffer.allocUnsafeSlow(size)</code></a> instead.</p>
<h4 id="DEP0031">DEP0031: <code>ecdh.setPublicKey()</code><span><a class="mark" href="#dep0031-ecdhsetpublickey" id="dep0031-ecdhsetpublickey">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0031_ecdh_setpublickey"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v5.2.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="crypto.html#ecdhsetpublickeypublickey-encoding"><code>ecdh.setPublicKey()</code></a> method is now deprecated as its inclusion in the
API is not useful.</p>
<h4 id="DEP0032">DEP0032: <code>node:domain</code> module<span><a class="mark" href="#dep0032-nodedomain-module" id="dep0032-nodedomain-module">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0032_node_domain_module"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v1.4.2</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="domain.html"><code>domain</code></a> module is deprecated and should not be used.</p>
<h4 id="DEP0033">DEP0033: <code>EventEmitter.listenerCount()</code><span><a class="mark" href="#dep0033-eventemitterlistenercount" id="dep0033-eventemitterlistenercount">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0033_eventemitter_listenercount"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.2.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="events.html#eventslistenercountemitter-eventname"><code>events.listenerCount(emitter, eventName)</code></a> API is
deprecated. Please use <a href="events.html#emitterlistenercounteventname-listener"><code>emitter.listenerCount(eventName)</code></a> instead.</p>
<h4 id="DEP0034">DEP0034: <code>fs.exists(path, callback)</code><span><a class="mark" href="#dep0034-fsexistspath-callback" id="dep0034-fsexistspath-callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0034_fs_exists_path_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v1.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="fs.html#fsexistspath-callback"><code>fs.exists(path, callback)</code></a> API is deprecated. Please use
<a href="fs.html#fsstatpath-options-callback"><code>fs.stat()</code></a> or <a href="fs.html#fsaccesspath-mode-callback"><code>fs.access()</code></a> instead.</p>
<h4 id="DEP0035">DEP0035: <code>fs.lchmod(path, mode, callback)</code><span><a class="mark" href="#dep0035-fslchmodpath-mode-callback" id="dep0035-fslchmodpath-mode-callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0035_fs_lchmod_path_mode_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.4.7</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="fs.html#fslchmodpath-mode-callback"><code>fs.lchmod(path, mode, callback)</code></a> API is deprecated.</p>
<h4 id="DEP0036">DEP0036: <code>fs.lchmodSync(path, mode)</code><span><a class="mark" href="#dep0036-fslchmodsyncpath-mode" id="dep0036-fslchmodsyncpath-mode">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0036_fs_lchmodsync_path_mode"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.4.7</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="fs.html#fslchmodsyncpath-mode"><code>fs.lchmodSync(path, mode)</code></a> API is deprecated.</p>
<h4 id="DEP0037">DEP0037: <code>fs.lchown(path, uid, gid, callback)</code><span><a class="mark" href="#dep0037-fslchownpath-uid-gid-callback" id="dep0037-fslchownpath-uid-gid-callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0037_fs_lchown_path_uid_gid_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.6.0</td>
<td><p>Deprecation revoked.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.4.7</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Deprecation revoked</p>
<p>The <a href="fs.html#fslchownpath-uid-gid-callback"><code>fs.lchown(path, uid, gid, callback)</code></a> API was deprecated. The
deprecation was revoked because the requisite supporting APIs were added in
libuv.</p>
<h4 id="DEP0038">DEP0038: <code>fs.lchownSync(path, uid, gid)</code><span><a class="mark" href="#dep0038-fslchownsyncpath-uid-gid" id="dep0038-fslchownsyncpath-uid-gid">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0038_fs_lchownsync_path_uid_gid"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.6.0</td>
<td><p>Deprecation revoked.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.4.7</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Deprecation revoked</p>
<p>The <a href="fs.html#fslchownsyncpath-uid-gid"><code>fs.lchownSync(path, uid, gid)</code></a> API was deprecated. The deprecation was
revoked because the requisite supporting APIs were added in libuv.</p>
<h4 id="DEP0039">DEP0039: <code>require.extensions</code><span><a class="mark" href="#dep0039-requireextensions" id="dep0039-requireextensions">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0039_require_extensions"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.10.6</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="modules.html#requireextensions"><code>require.extensions</code></a> property is deprecated.</p>
<h4 id="DEP0040">DEP0040: <code>node:punycode</code> module<span><a class="mark" href="#dep0040-nodepunycode-module" id="dep0040-nodepunycode-module">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0040_node_punycode_module"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v21.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v16.6.0</td>
<td><p>Added support for <code>--pending-deprecation</code>.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="punycode.html"><code>punycode</code></a> module is deprecated. Please use a userland alternative
instead.</p>
<h4 id="DEP0041">DEP0041: <code>NODE_REPL_HISTORY_FILE</code> environment variable<span><a class="mark" href="#dep0041-node_repl_history_file-environment-variable" id="dep0041-node_repl_history_file-environment-variable">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0041_node_repl_history_file_environment_variable"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>NODE_REPL_HISTORY_FILE</code> environment variable was removed. Please use
<code>NODE_REPL_HISTORY</code> instead.</p>
<h4 id="DEP0042">DEP0042: <code>tls.CryptoStream</code><span><a class="mark" href="#dep0042-tlscryptostream" id="dep0042-tlscryptostream">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0042_tls_cryptostream"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <a href="tls.html#class-tlscryptostream"><code>tls.CryptoStream</code></a> class was removed. Please use
<a href="tls.html#class-tlstlssocket"><code>tls.TLSSocket</code></a> instead.</p>
<h4 id="DEP0043">DEP0043: <code>tls.SecurePair</code><span><a class="mark" href="#dep0043-tlssecurepair" id="dep0043-tlssecurepair">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0043_tls_securepair"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
<tr><td>v0.11.15</td>
<td><p>Deprecation revoked.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="tls.html#class-tlssecurepair"><code>tls.SecurePair</code></a> class is deprecated. Please use
<a href="tls.html#class-tlstlssocket"><code>tls.TLSSocket</code></a> instead.</p>
<h4 id="DEP0044">DEP0044: <code>util.isArray()</code><span><a class="mark" href="#dep0044-utilisarray" id="dep0044-utilisarray">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0044_util_isarray"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisarrayobject"><code>util.isArray()</code></a> API is deprecated. Please use <code>Array.isArray()</code>
instead.</p>
<h4 id="DEP0045">DEP0045: <code>util.isBoolean()</code><span><a class="mark" href="#dep0045-utilisboolean" id="dep0045-utilisboolean">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0045_util_isboolean"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisbooleanobject"><code>util.isBoolean()</code></a> API is deprecated. Please use
<code>typeof arg === 'boolean'</code> instead.</p>
<h4 id="DEP0046">DEP0046: <code>util.isBuffer()</code><span><a class="mark" href="#dep0046-utilisbuffer" id="dep0046-utilisbuffer">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0046_util_isbuffer"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisbufferobject"><code>util.isBuffer()</code></a> API is deprecated. Please use
<a href="buffer.html#static-method-bufferisbufferobj"><code>Buffer.isBuffer()</code></a> instead.</p>
<h4 id="DEP0047">DEP0047: <code>util.isDate()</code><span><a class="mark" href="#dep0047-utilisdate" id="dep0047-utilisdate">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0047_util_isdate"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisdateobject"><code>util.isDate()</code></a> API is deprecated. Please use
<code>arg instanceof Date</code> instead.</p>
<h4 id="DEP0048">DEP0048: <code>util.isError()</code><span><a class="mark" href="#dep0048-utiliserror" id="dep0048-utiliserror">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0048_util_iserror"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utiliserrorobject"><code>util.isError()</code></a> API is deprecated. Please use
<code>Object.prototype.toString(arg) === '[object Error]' || arg instanceof Error</code>
instead.</p>
<h4 id="DEP0049">DEP0049: <code>util.isFunction()</code><span><a class="mark" href="#dep0049-utilisfunction" id="dep0049-utilisfunction">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0049_util_isfunction"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisfunctionobject"><code>util.isFunction()</code></a> API is deprecated. Please use
<code>typeof arg === 'function'</code> instead.</p>
<h4 id="DEP0050">DEP0050: <code>util.isNull()</code><span><a class="mark" href="#dep0050-utilisnull" id="dep0050-utilisnull">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0050_util_isnull"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisnullobject"><code>util.isNull()</code></a> API is deprecated. Please use
<code>arg === null</code> instead.</p>
<h4 id="DEP0051">DEP0051: <code>util.isNullOrUndefined()</code><span><a class="mark" href="#dep0051-utilisnullorundefined" id="dep0051-utilisnullorundefined">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0051_util_isnullorundefined"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisnullorundefinedobject"><code>util.isNullOrUndefined()</code></a> API is deprecated. Please use
<code>arg === null || arg === undefined</code> instead.</p>
<h4 id="DEP0052">DEP0052: <code>util.isNumber()</code><span><a class="mark" href="#dep0052-utilisnumber" id="dep0052-utilisnumber">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0052_util_isnumber"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisnumberobject"><code>util.isNumber()</code></a> API is deprecated. Please use
<code>typeof arg === 'number'</code> instead.</p>
<h4 id="DEP0053">DEP0053: <code>util.isObject()</code><span><a class="mark" href="#dep0053-utilisobject" id="dep0053-utilisobject">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0053_util_isobject"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisobjectobject"><code>util.isObject()</code></a> API is deprecated. Please use
<code>arg && typeof arg === 'object'</code> instead.</p>
<h4 id="DEP0054">DEP0054: <code>util.isPrimitive()</code><span><a class="mark" href="#dep0054-utilisprimitive" id="dep0054-utilisprimitive">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0054_util_isprimitive"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisprimitiveobject"><code>util.isPrimitive()</code></a> API is deprecated. Please use
<code>arg === null || (typeof arg !=='object' && typeof arg !== 'function')</code>
instead.</p>
<h4 id="DEP0055">DEP0055: <code>util.isRegExp()</code><span><a class="mark" href="#dep0055-utilisregexp" id="dep0055-utilisregexp">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0055_util_isregexp"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisregexpobject"><code>util.isRegExp()</code></a> API is deprecated. Please use
<code>arg instanceof RegExp</code> instead.</p>
<h4 id="DEP0056">DEP0056: <code>util.isString()</code><span><a class="mark" href="#dep0056-utilisstring" id="dep0056-utilisstring">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0056_util_isstring"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisstringobject"><code>util.isString()</code></a> API is deprecated. Please use
<code>typeof arg === 'string'</code> instead.</p>
<h4 id="DEP0057">DEP0057: <code>util.isSymbol()</code><span><a class="mark" href="#dep0057-utilissymbol" id="dep0057-utilissymbol">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0057_util_issymbol"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilissymbolobject"><code>util.isSymbol()</code></a> API is deprecated. Please use
<code>typeof arg === 'symbol'</code> instead.</p>
<h4 id="DEP0058">DEP0058: <code>util.isUndefined()</code><span><a class="mark" href="#dep0058-utilisundefined" id="dep0058-utilisundefined">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0058_util_isundefined"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0, v4.8.6</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v4.0.0, v3.3.1</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utilisundefinedobject"><code>util.isUndefined()</code></a> API is deprecated. Please use
<code>arg === undefined</code> instead.</p>
<h4 id="DEP0059">DEP0059: <code>util.log()</code><span><a class="mark" href="#dep0059-utillog" id="dep0059-utillog">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0059_util_log"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#utillogstring"><code>util.log()</code></a> API has been deprecated because it's an unmaintained
legacy API that was exposed to user land by accident. Instead,
consider the following alternatives based on your specific needs:</p>
<ul>
<li>
<p><strong>Third-Party Logging Libraries</strong></p>
</li>
<li>
<p><strong>Use <code>console.log(new Date().toLocaleString(), message)</code></strong></p>
</li>
</ul>
<p>By adopting one of these alternatives, you can transition away from <code>util.log()</code>
and choose a logging strategy that aligns with the specific
requirements and complexity of your application.</p>
<h4 id="DEP0060">DEP0060: <code>util._extend()</code><span><a class="mark" href="#dep0060-util_extend" id="dep0060-util_extend">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0060_util_extend"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="util.html#util_extendtarget-source"><code>util._extend()</code></a> API is deprecated because it's an unmaintained
legacy API that was exposed to user land by accident.
Please use <code>target = Object.assign(target, source)</code> instead.</p>
<h4 id="DEP0061">DEP0061: <code>fs.SyncWriteStream</code><span><a class="mark" href="#dep0061-fssyncwritestream" id="dep0061-fssyncwritestream">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0061_fs_syncwritestream"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v7.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>fs.SyncWriteStream</code> class was never intended to be a publicly accessible
API and has been removed. No alternative API is available. Please use a userland
alternative.</p>
<h4 id="DEP0062">DEP0062: <code>node --debug</code><span><a class="mark" href="#dep0062-node---debug" id="dep0062-node---debug">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0062_node_debug"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>--debug</code> activates the legacy V8 debugger interface, which was removed as
of V8 5.8. It is replaced by Inspector which is activated with <code>--inspect</code>
instead.</p>
<h4 id="DEP0063">DEP0063: <code>ServerResponse.prototype.writeHeader()</code><span><a class="mark" href="#dep0063-serverresponseprototypewriteheader" id="dep0063-serverresponseprototypewriteheader">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0063_serverresponse_prototype_writeheader"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>node:http</code> module <code>ServerResponse.prototype.writeHeader()</code> API is
deprecated. Please use <code>ServerResponse.prototype.writeHead()</code> instead.</p>
<p>The <code>ServerResponse.prototype.writeHeader()</code> method was never documented as an
officially supported API.</p>
<h4 id="DEP0064">DEP0064: <code>tls.createSecurePair()</code><span><a class="mark" href="#dep0064-tlscreatesecurepair" id="dep0064-tlscreatesecurepair">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0064_tls_createsecurepair"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v6.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
<tr><td>v0.11.15</td>
<td><p>Deprecation revoked.</p></td></tr>
<tr><td>v0.11.3</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>tls.createSecurePair()</code> API was deprecated in documentation in Node.js
0.11.3. Users should use <code>tls.Socket</code> instead.</p>
<h4 id="DEP0065">DEP0065: <code>repl.REPL_MODE_MAGIC</code> and <code>NODE_REPL_MODE=magic</code><span><a class="mark" href="#dep0065-replrepl_mode_magic-and-node_repl_modemagic" id="dep0065-replrepl_mode_magic-and-node_repl_modemagic">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0065_repl_repl_mode_magic_and_node_repl_mode_magic"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>node:repl</code> module's <code>REPL_MODE_MAGIC</code> constant, used for <code>replMode</code> option,
has been removed. Its behavior has been functionally identical to that of
<code>REPL_MODE_SLOPPY</code> since Node.js 6.0.0, when V8 5.0 was imported. Please use
<code>REPL_MODE_SLOPPY</code> instead.</p>
<p>The <code>NODE_REPL_MODE</code> environment variable is used to set the underlying
<code>replMode</code> of an interactive <code>node</code> session. Its value, <code>magic</code>, is also
removed. Please use <code>sloppy</code> instead.</p>
<h4 id="DEP0066">DEP0066: <code>OutgoingMessage.prototype._headers, OutgoingMessage.prototype._headerNames</code><span><a class="mark" href="#dep0066-outgoingmessageprototype_headers-outgoingmessageprototype_headernames" id="dep0066-outgoingmessageprototype_headers-outgoingmessageprototype_headernames">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0066_outgoingmessage_prototype_headers_outgoingmessage_prototype_headernames"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>node:http</code> module <code>OutgoingMessage.prototype._headers</code> and
<code>OutgoingMessage.prototype._headerNames</code> properties are deprecated. Use one of
the public methods (e.g. <code>OutgoingMessage.prototype.getHeader()</code>,
<code>OutgoingMessage.prototype.getHeaders()</code>,
<code>OutgoingMessage.prototype.getHeaderNames()</code>,
<code>OutgoingMessage.prototype.getRawHeaderNames()</code>,
<code>OutgoingMessage.prototype.hasHeader()</code>,
<code>OutgoingMessage.prototype.removeHeader()</code>,
<code>OutgoingMessage.prototype.setHeader()</code>) for working with outgoing headers.</p>
<p>The <code>OutgoingMessage.prototype._headers</code> and
<code>OutgoingMessage.prototype._headerNames</code> properties were never documented as
officially supported properties.</p>
<h4 id="DEP0067">DEP0067: <code>OutgoingMessage.prototype._renderHeaders</code><span><a class="mark" href="#dep0067-outgoingmessageprototype_renderheaders" id="dep0067-outgoingmessageprototype_renderheaders">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0067_outgoingmessage_prototype_renderheaders"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>node:http</code> module <code>OutgoingMessage.prototype._renderHeaders()</code> API is
deprecated.</p>
<p>The <code>OutgoingMessage.prototype._renderHeaders</code> property was never documented as
an officially supported API.</p>
<h4 id="DEP0068">DEP0068: <code>node debug</code><span><a class="mark" href="#dep0068-node-debug" id="dep0068-node-debug">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0068_node_debug"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>The legacy <code>node debug</code> command was removed.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>node debug</code> corresponds to the legacy CLI debugger which has been replaced with
a V8-inspector based CLI debugger available through <code>node inspect</code>.</p>
<h4 id="DEP0069">DEP0069: <code>vm.runInDebugContext(string)</code><span><a class="mark" href="#dep0069-vmrunindebugcontextstring" id="dep0069-vmrunindebugcontextstring">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0069_vm_runindebugcontext_string"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>DebugContext has been removed in V8 and is not available in Node.js 10+.</p>
<p>DebugContext was an experimental API.</p>
<h4 id="DEP0070">DEP0070: <code>async_hooks.currentId()</code><span><a class="mark" href="#dep0070-async_hookscurrentid" id="dep0070-async_hookscurrentid">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0070_async_hooks_currentid"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.2.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>async_hooks.currentId()</code> was renamed to <code>async_hooks.executionAsyncId()</code> for
clarity.</p>
<p>This change was made while <code>async_hooks</code> was an experimental API.</p>
<h4 id="DEP0071">DEP0071: <code>async_hooks.triggerId()</code><span><a class="mark" href="#dep0071-async_hookstriggerid" id="dep0071-async_hookstriggerid">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0071_async_hooks_triggerid"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.2.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>async_hooks.triggerId()</code> was renamed to <code>async_hooks.triggerAsyncId()</code> for
clarity.</p>
<p>This change was made while <code>async_hooks</code> was an experimental API.</p>
<h4 id="DEP0072">DEP0072: <code>async_hooks.AsyncResource.triggerId()</code><span><a class="mark" href="#dep0072-async_hooksasyncresourcetriggerid" id="dep0072-async_hooksasyncresourcetriggerid">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0072_async_hooks_asyncresource_triggerid"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.2.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>async_hooks.AsyncResource.triggerId()</code> was renamed to
<code>async_hooks.AsyncResource.triggerAsyncId()</code> for clarity.</p>
<p>This change was made while <code>async_hooks</code> was an experimental API.</p>
<h4 id="DEP0073">DEP0073: Several internal properties of <code>net.Server</code><span><a class="mark" href="#dep0073-several-internal-properties-of-netserver" id="dep0073-several-internal-properties-of-netserver">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0073_several_internal_properties_of_net_server"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Accessing several internal, undocumented properties of <code>net.Server</code> instances
with inappropriate names is deprecated.</p>
<p>As the original API was undocumented and not generally useful for non-internal
code, no replacement API is provided.</p>
<h4 id="DEP0074">DEP0074: <code>REPLServer.bufferedCommand</code><span><a class="mark" href="#dep0074-replserverbufferedcommand" id="dep0074-replserverbufferedcommand">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0074_replserver_bufferedcommand"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>REPLServer.bufferedCommand</code> property was deprecated in favor of
<a href="repl.html#replserverclearbufferedcommand"><code>REPLServer.clearBufferedCommand()</code></a>.</p>
<h4 id="DEP0075">DEP0075: <code>REPLServer.parseREPLKeyword()</code><span><a class="mark" href="#dep0075-replserverparsereplkeyword" id="dep0075-replserverparsereplkeyword">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0075_replserver_parsereplkeyword"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>REPLServer.parseREPLKeyword()</code> was removed from userland visibility.</p>
<h4 id="DEP0076">DEP0076: <code>tls.parseCertString()</code><span><a class="mark" href="#dep0076-tlsparsecertstring" id="dep0076-tlsparsecertstring">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0076_tls_parsecertstring"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v8.6.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>tls.parseCertString()</code> was a trivial parsing helper that was made public by
mistake. While it was supposed to parse certificate subject and issuer strings,
it never handled multi-value Relative Distinguished Names correctly.</p>
<p>Earlier versions of this document suggested using <code>querystring.parse()</code> as an
alternative to <code>tls.parseCertString()</code>. However, <code>querystring.parse()</code> also does
not handle all certificate subjects correctly and should not be used.</p>
<h4 id="DEP0077">DEP0077: <code>Module._debug()</code><span><a class="mark" href="#dep0077-module_debug" id="dep0077-module_debug">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0077_module_debug"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>Module._debug()</code> is deprecated.</p>
<p>The <code>Module._debug()</code> function was never documented as an officially
supported API.</p>
<h4 id="DEP0078">DEP0078: <code>REPLServer.turnOffEditorMode()</code><span><a class="mark" href="#dep0078-replserverturnoffeditormode" id="dep0078-replserverturnoffeditormode">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0078_replserver_turnoffeditormode"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>REPLServer.turnOffEditorMode()</code> was removed from userland visibility.</p>
<h4 id="DEP0079">DEP0079: Custom inspection function on objects via <code>.inspect()</code><span><a class="mark" href="#dep0079-custom-inspection-function-on-objects-via-inspect" id="dep0079-custom-inspection-function-on-objects-via-inspect">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0079_custom_inspection_function_on_objects_via_inspect"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v8.7.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Using a property named <code>inspect</code> on an object to specify a custom inspection
function for <a href="util.html#utilinspectobject-options"><code>util.inspect()</code></a> is deprecated. Use <a href="util.html#utilinspectcustom"><code>util.inspect.custom</code></a>
instead. For backward compatibility with Node.js prior to version 6.4.0, both
can be specified.</p>
<h4 id="DEP0080">DEP0080: <code>path._makeLong()</code><span><a class="mark" href="#dep0080-path_makelong" id="dep0080-path_makelong">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0080_path_makelong"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The internal <code>path._makeLong()</code> was not intended for public use. However,
userland modules have found it useful. The internal API is deprecated
and replaced with an identical, public <code>path.toNamespacedPath()</code> method.</p>
<h4 id="DEP0081">DEP0081: <code>fs.truncate()</code> using a file descriptor<span><a class="mark" href="#dep0081-fstruncate-using-a-file-descriptor" id="dep0081-fstruncate-using-a-file-descriptor">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0081_fs_truncate_using_a_file_descriptor"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>fs.truncate()</code> <code>fs.truncateSync()</code> usage with a file descriptor is
deprecated. Please use <code>fs.ftruncate()</code> or <code>fs.ftruncateSync()</code> to work with
file descriptors.</p>
<h4 id="DEP0082">DEP0082: <code>REPLServer.prototype.memory()</code><span><a class="mark" href="#dep0082-replserverprototypememory" id="dep0082-replserverprototypememory">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0082_replserver_prototype_memory"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>REPLServer.prototype.memory()</code> is only necessary for the internal mechanics of
the <code>REPLServer</code> itself. Do not use this function.</p>
<h4 id="DEP0083">DEP0083: Disabling ECDH by setting <code>ecdhCurve</code> to <code>false</code><span><a class="mark" href="#dep0083-disabling-ecdh-by-setting-ecdhcurve-to-false" id="dep0083-disabling-ecdh-by-setting-ecdhcurve-to-false">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0083_disabling_ecdh_by_setting_ecdhcurve_to_false"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.2.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life.</p>
<p>The <code>ecdhCurve</code> option to <code>tls.createSecureContext()</code> and <code>tls.TLSSocket</code> could
be set to <code>false</code> 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 <code>ciphers</code> parameter instead.</p>
<h4 id="DEP0084">DEP0084: requiring bundled internal dependencies<span><a class="mark" href="#dep0084-requiring-bundled-internal-dependencies" id="dep0084-requiring-bundled-internal-dependencies">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0084_requiring_bundled_internal_dependencies"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>This functionality has been removed.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>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 <code>require()</code>. These
modules were:</p>
<ul>
<li><code>v8/tools/codemap</code></li>
<li><code>v8/tools/consarray</code></li>
<li><code>v8/tools/csvparser</code></li>
<li><code>v8/tools/logreader</code></li>
<li><code>v8/tools/profile_view</code></li>
<li><code>v8/tools/profile</code></li>
<li><code>v8/tools/SourceMap</code></li>
<li><code>v8/tools/splaytree</code></li>
<li><code>v8/tools/tickprocessor-driver</code></li>
<li><code>v8/tools/tickprocessor</code></li>
<li><code>node-inspect/lib/_inspect</code> (from 7.6.0)</li>
<li><code>node-inspect/lib/internal/inspect_client</code> (from 7.6.0)</li>
<li><code>node-inspect/lib/internal/inspect_repl</code> (from 7.6.0)</li>
</ul>
<p>The <code>v8/*</code> 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 <code>require()</code>.</p>
<p>On the other hand, <code>node-inspect</code> can 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.</p>
<h4 id="DEP0085">DEP0085: AsyncHooks sensitive API<span><a class="mark" href="#dep0085-asynchooks-sensitive-api" id="dep0085-asynchooks-sensitive-api">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0085_asynchooks_sensitive_api"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.4.0, v8.10.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The AsyncHooks sensitive API was never documented and had various minor issues.
Use the <code>AsyncResource</code> API instead. See
<a href="https://github.com/nodejs/node/issues/15572">https://github.com/nodejs/node/issues/15572</a>.</p>
<h4 id="DEP0086">DEP0086: Remove <code>runInAsyncIdScope</code><span><a class="mark" href="#dep0086-remove-runinasyncidscope" id="dep0086-remove-runinasyncidscope">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0086_remove_runinasyncidscope"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v9.4.0, v8.10.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>runInAsyncIdScope</code> doesn't emit the <code>'before'</code> or <code>'after'</code> event and can thus
cause a lot of issues. See <a href="https://github.com/nodejs/node/issues/14328">https://github.com/nodejs/node/issues/14328</a>.</p>
<!-- md-lint skip-deprecation DEP0087 -->
<!-- md-lint skip-deprecation DEP0088 -->
<h4 id="DEP0089">DEP0089: <code>require('node:assert')</code><span><a class="mark" href="#dep0089-requirenodeassert" id="dep0089-requirenodeassert">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0089_require_node_assert"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.8.0</td>
<td><p>Deprecation revoked.</p></td></tr>
<tr><td>v9.9.0, v8.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Deprecation revoked</p>
<p>Importing assert directly was not recommended as the exposed functions use
loose equality checks. The deprecation was revoked because use of the
<code>node:assert</code> module is not discouraged, and the deprecation caused developer
confusion.</p>
<h4 id="DEP0090">DEP0090: Invalid GCM authentication tag lengths<span><a class="mark" href="#dep0090-invalid-gcm-authentication-tag-lengths" id="dep0090-invalid-gcm-authentication-tag-lengths">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0090_invalid_gcm_authentication_tag_lengths"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Node.js used to support all GCM authentication tag lengths which are accepted by
OpenSSL when calling <a href="crypto.html#deciphersetauthtagbuffer-encoding"><code>decipher.setAuthTag()</code></a>. 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
<a href="https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf">NIST SP 800-38D</a>.</p>
<h4 id="DEP0091">DEP0091: <code>crypto.DEFAULT_ENCODING</code><span><a class="mark" href="#dep0091-cryptodefault_encoding" id="dep0091-cryptodefault_encoding">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0091_crypto_default_encoding"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>crypto.DEFAULT_ENCODING</code> property only existed for compatibility with
Node.js releases prior to versions 0.9.3 and has been removed.</p>
<h4 id="DEP0092">DEP0092: Top-level <code>this</code> bound to <code>module.exports</code><span><a class="mark" href="#dep0092-top-level-this-bound-to-moduleexports" id="dep0092-top-level-this-bound-to-moduleexports">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0092_top_level_this_bound_to_module_exports"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Assigning properties to the top-level <code>this</code> as an alternative
to <code>module.exports</code> is deprecated. Developers should use <code>exports</code>
or <code>module.exports</code> instead.</p>
<h4 id="DEP0093">DEP0093: <code>crypto.fips</code> is deprecated and replaced<span><a class="mark" href="#dep0093-cryptofips-is-deprecated-and-replaced" id="dep0093-cryptofips-is-deprecated-and-replaced">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0093_crypto_fips_is_deprecated_and_replaced"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="crypto.html#cryptofips"><code>crypto.fips</code></a> property is deprecated. Please use <code>crypto.setFips()</code>
and <code>crypto.getFips()</code> instead.</p>
<h4 id="DEP0094">DEP0094: Using <code>assert.fail()</code> with more than one argument<span><a class="mark" href="#dep0094-using-assertfail-with-more-than-one-argument" id="dep0094-using-assertfail-with-more-than-one-argument">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0094_using_assert_fail_with_more_than_one_argument"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Using <code>assert.fail()</code> with more than one argument is deprecated. Use
<code>assert.fail()</code> with only one argument or use a different <code>node:assert</code> module
method.</p>
<h4 id="DEP0095">DEP0095: <code>timers.enroll()</code><span><a class="mark" href="#dep0095-timersenroll" id="dep0095-timersenroll">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0095_timers_enroll"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>timers.enroll()</code> is deprecated. Please use the publicly documented
<a href="timers.html#settimeoutcallback-delay-args"><code>setTimeout()</code></a> or <a href="timers.html#setintervalcallback-delay-args"><code>setInterval()</code></a> instead.</p>
<h4 id="DEP0096">DEP0096: <code>timers.unenroll()</code><span><a class="mark" href="#dep0096-timersunenroll" id="dep0096-timersunenroll">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0096_timers_unenroll"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>timers.unenroll()</code> is deprecated. Please use the publicly documented
<a href="timers.html#cleartimeouttimeout"><code>clearTimeout()</code></a> or <a href="timers.html#clearintervaltimeout"><code>clearInterval()</code></a> instead.</p>
<h4 id="DEP0097">DEP0097: <code>MakeCallback</code> with <code>domain</code> property<span><a class="mark" href="#dep0097-makecallback-with-domain-property" id="dep0097-makecallback-with-domain-property">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0097_makecallback_with_domain_property"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Users of <code>MakeCallback</code> that add the <code>domain</code> property to carry context,
should start using the <code>async_context</code> variant of <code>MakeCallback</code> or
<code>CallbackScope</code>, or the high-level <code>AsyncResource</code> class.</p>
<h4 id="DEP0098">DEP0098: AsyncHooks embedder <code>AsyncResource.emitBefore</code> and <code>AsyncResource.emitAfter</code> APIs<span><a class="mark" href="#dep0098-asynchooks-embedder-asyncresourceemitbefore-and-asyncresourceemitafter-apis" id="dep0098-asynchooks-embedder-asyncresourceemitbefore-and-asyncresourceemitafter-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0098_asynchooks_embedder_asyncresource_emitbefore_and_asyncresource_emitafter_apis"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0, v9.6.0, v8.12.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The embedded API provided by AsyncHooks exposes <code>.emitBefore()</code> and
<code>.emitAfter()</code> methods which are very easy to use incorrectly which can lead
to unrecoverable errors.</p>
<p>Use <a href="async_context.html#asyncresourceruninasyncscopefn-thisarg-args"><code>asyncResource.runInAsyncScope()</code></a> API instead which provides a much
safer, and more convenient, alternative. See
<a href="https://github.com/nodejs/node/pull/18513">https://github.com/nodejs/node/pull/18513</a>.</p>
<h4 id="DEP0099">DEP0099: Async context-unaware <code>node::MakeCallback</code> C++ APIs<span><a class="mark" href="#dep0099-async-context-unaware-nodemakecallback-c-apis" id="dep0099-async-context-unaware-nodemakecallback-c-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0099_async_context_unaware_node_makecallback_c_apis"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Compile-time deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Compile-time</p>
<p>Certain versions of <code>node::MakeCallback</code> APIs available to native addons are
deprecated. Please use the versions of the API that accept an <code>async_context</code>
parameter.</p>
<h4 id="DEP0100">DEP0100: <code>process.assert()</code><span><a class="mark" href="#dep0100-processassert" id="dep0100-processassert">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0100_process_assert"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v0.3.7</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>process.assert()</code> is deprecated. Please use the <a href="assert.html"><code>assert</code></a> module instead.</p>
<p>This was never a documented feature.</p>
<h4 id="DEP0101">DEP0101: <code>--with-lttng</code><span><a class="mark" href="#dep0101---with-lttng" id="dep0101---with-lttng">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0101_with_lttng"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>--with-lttng</code> compile-time option has been removed.</p>
<h4 id="DEP0102">DEP0102: Using <code>noAssert</code> in <code>Buffer#(read|write)</code> operations<span><a class="mark" href="#dep0102-using-noassert-in-bufferreadwrite-operations" id="dep0102-using-noassert-in-bufferreadwrite-operations">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0102_using_noassert_in_buffer_read_write_operations"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Using the <code>noAssert</code> argument has no functionality anymore. All input is
verified regardless of the value of <code>noAssert</code>. Skipping the verification
could lead to hard-to-find errors and crashes.</p>
<h4 id="DEP0103">DEP0103: <code>process.binding('util').is[...]</code> typechecks<span><a class="mark" href="#dep0103-processbindingutilis-typechecks" id="dep0103-processbindingutilis-typechecks">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0103_process_binding_util_is_typechecks"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.9.0</td>
<td><p>Superseded by <a href="#DEP0111">DEP0111</a>.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>Using <code>process.binding()</code> in general should be avoided. The type checking
methods in particular can be replaced by using <a href="util.html#utiltypes"><code>util.types</code></a>.</p>
<p>This deprecation has been superseded by the deprecation of the
<code>process.binding()</code> API (<a href="#DEP0111">DEP0111</a>).</p>
<h4 id="DEP0104">DEP0104: <code>process.env</code> string coercion<span><a class="mark" href="#dep0104-processenv-string-coercion" id="dep0104-processenv-string-coercion">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0104_process_env_string_coercion"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>When assigning a non-string property to <a href="process.html#processenv"><code>process.env</code></a>, 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 might
result in a thrown error. Please convert the property to a string before
assigning it to <code>process.env</code>.</p>
<h4 id="DEP0105">DEP0105: <code>decipher.finaltol</code><span><a class="mark" href="#dep0105-decipherfinaltol" id="dep0105-decipherfinaltol">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0105_decipher_finaltol"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>decipher.finaltol()</code> has never been documented and was an alias for
<a href="crypto.html#decipherfinaloutputencoding"><code>decipher.final()</code></a>. This API has been removed, and it is recommended to use
<a href="crypto.html#decipherfinaloutputencoding"><code>decipher.final()</code></a> instead.</p>
<h4 id="DEP0106">DEP0106: <code>crypto.createCipher</code> and <code>crypto.createDecipher</code><span><a class="mark" href="#dep0106-cryptocreatecipher-and-cryptocreatedecipher" id="dep0106-cryptocreatecipher-and-cryptocreatedecipher">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0106_crypto_createcipher_and_crypto_createdecipher"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>crypto.createCipher()</code> and <code>crypto.createDecipher()</code> have been removed
as they use a weak key derivation function (MD5 with no salt) and static
initialization vectors.
It is recommended to derive a key using
<a href="crypto.html#cryptopbkdf2password-salt-iterations-keylen-digest-callback"><code>crypto.pbkdf2()</code></a> or <a href="crypto.html#cryptoscryptpassword-salt-keylen-options-callback"><code>crypto.scrypt()</code></a> with random salts and to use
<a href="crypto.html#cryptocreatecipherivalgorithm-key-iv-options"><code>crypto.createCipheriv()</code></a> and <a href="crypto.html#cryptocreatedecipherivalgorithm-key-iv-options"><code>crypto.createDecipheriv()</code></a> to obtain the
<a href="crypto.html#class-cipher"><code>Cipher</code></a> and <a href="crypto.html#class-decipher"><code>Decipher</code></a> objects respectively.</p>
<h4 id="DEP0107">DEP0107: <code>tls.convertNPNProtocols()</code><span><a class="mark" href="#dep0107-tlsconvertnpnprotocols" id="dep0107-tlsconvertnpnprotocols">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0107_tls_convertnpnprotocols"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>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.</p>
<h4 id="DEP0108">DEP0108: <code>zlib.bytesRead</code><span><a class="mark" href="#dep0108-zlibbytesread" id="dep0108-zlibbytesread">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0108_zlib_bytesread"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Deprecated alias for <a href="zlib.html#zlibbyteswritten"><code>zlib.bytesWritten</code></a>. 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.</p>
<h4 id="DEP0109">DEP0109: <code>http</code>, <code>https</code>, and <code>tls</code> support for invalid URLs<span><a class="mark" href="#dep0109-http-https-and-tls-support-for-invalid-urls" id="dep0109-http-https-and-tls-support-for-invalid-urls">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0109_http_https_and_tls_support_for_invalid_urls"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Some previously supported (but strictly invalid) URLs were accepted through the
<a href="http.html#httprequestoptions-callback"><code>http.request()</code></a>, <a href="http.html#httpgetoptions-callback"><code>http.get()</code></a>, <a href="https.html#httpsrequestoptions-callback"><code>https.request()</code></a>,
<a href="https.html#httpsgetoptions-callback"><code>https.get()</code></a>, and <a href="tls.html#tlscheckserveridentityhostname-cert"><code>tls.checkServerIdentity()</code></a> APIs because those were
accepted by the legacy <code>url.parse()</code> 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.</p>
<h4 id="DEP0110">DEP0110: <code>vm.Script</code> cached data<span><a class="mark" href="#dep0110-vmscript-cached-data" id="dep0110-vmscript-cached-data">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0110_vm_script_cached_data"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.6.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>produceCachedData</code> option is deprecated. Use
<a href="vm.html#scriptcreatecacheddata"><code>script.createCachedData()</code></a> instead.</p>
<h4 id="DEP0111">DEP0111: <code>process.binding()</code><span><a class="mark" href="#dep0111-processbinding" id="dep0111-processbinding">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0111_process_binding"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.12.0</td>
<td><p>Added support for <code>--pending-deprecation</code>.</p></td></tr>
<tr><td>v10.9.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p><code>process.binding()</code> is for use by Node.js internal code only.</p>
<p>While <code>process.binding()</code> has not reached End-of-Life status in general, it is
unavailable when the <a href="permissions.html#permission-model">permission model</a> is enabled.</p>
<h4 id="DEP0112">DEP0112: <code>dgram</code> private APIs<span><a class="mark" href="#dep0112-dgram-private-apis" id="dep0112-dgram-private-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0112_dgram_private_apis"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>node:dgram</code> module previously contained several APIs that were never meant
to accessed outside of Node.js core: <code>Socket.prototype._handle</code>,
<code>Socket.prototype._receiving</code>, <code>Socket.prototype._bindState</code>,
<code>Socket.prototype._queue</code>, <code>Socket.prototype._reuseAddr</code>,
<code>Socket.prototype._healthCheck()</code>, <code>Socket.prototype._stopReceiving()</code>, and
<code>dgram._createSocketHandle()</code>.</p>
<h4 id="DEP0113">DEP0113: <code>Cipher.setAuthTag()</code>, <code>Decipher.getAuthTag()</code><span><a class="mark" href="#dep0113-ciphersetauthtag-deciphergetauthtag" id="dep0113-ciphersetauthtag-deciphergetauthtag">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0113_cipher_setauthtag_decipher_getauthtag"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p><code>Cipher.setAuthTag()</code> and <code>Decipher.getAuthTag()</code> are no longer available. They
were never documented and would throw when called.</p>
<h4 id="DEP0114">DEP0114: <code>crypto._toBuf()</code><span><a class="mark" href="#dep0114-crypto_tobuf" id="dep0114-crypto_tobuf">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0114_crypto_tobuf"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>crypto._toBuf()</code> function was not designed to be used by modules outside
of Node.js core and was removed.</p>
<!--lint disable nodejs-yaml-comments -->
<h4 id="DEP0115">DEP0115: <code>crypto.prng()</code>, <code>crypto.pseudoRandomBytes()</code>, <code>crypto.rng()</code><span><a class="mark" href="#dep0115-cryptoprng-cryptopseudorandombytes-cryptorng" id="dep0115-cryptoprng-cryptopseudorandombytes-cryptorng">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0115_crypto_prng_crypto_pseudorandombytes_crypto_rng"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>Added documentation-only deprecation with <code>--pending-deprecation</code> support.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<!--lint enable nodejs-yaml-comments -->
<p>In recent versions of Node.js, there is no difference between
<a href="crypto.html#cryptorandombytessize-callback"><code>crypto.randomBytes()</code></a> and <code>crypto.pseudoRandomBytes()</code>. The latter is
deprecated along with the undocumented aliases <code>crypto.prng()</code> and
<code>crypto.rng()</code> in favor of <a href="crypto.html#cryptorandombytessize-callback"><code>crypto.randomBytes()</code></a> and might be removed in a
future release.</p>
<h4 id="DEP0116">DEP0116: Legacy URL API<span><a class="mark" href="#dep0116-legacy-url-api" id="dep0116-legacy-url-api">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0116_legacy_url_api"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.0.0, v18.13.0</td>
<td><p>`url.parse()` is deprecated again in DEP0169.</p></td></tr>
<tr><td>v15.13.0, v14.17.0</td>
<td><p>Deprecation revoked. Status changed to "Legacy".</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Deprecation revoked</p>
<p>The <a href="url.html#legacy-url-api">legacy URL API</a> is deprecated. This includes <a href="url.html#urlformaturlobject"><code>url.format()</code></a>,
<a href="url.html#urlparseurlstring-parsequerystring-slashesdenotehost"><code>url.parse()</code></a>, <a href="url.html#urlresolvefrom-to"><code>url.resolve()</code></a>, and the <a href="url.html#legacy-urlobject">legacy <code>urlObject</code></a>. Please
use the <a href="url.html#the-whatwg-url-api">WHATWG URL API</a> instead.</p>
<h4 id="DEP0117">DEP0117: Native crypto handles<span><a class="mark" href="#dep0117-native-crypto-handles" id="dep0117-native-crypto-handles">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0117_native_crypto_handles"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Previous versions of Node.js exposed handles to internal native objects through
the <code>_handle</code> property of the <code>Cipher</code>, <code>Decipher</code>, <code>DiffieHellman</code>,
<code>DiffieHellmanGroup</code>, <code>ECDH</code>, <code>Hash</code>, <code>Hmac</code>, <code>Sign</code>, and <code>Verify</code> classes.
The <code>_handle</code> property has been removed because improper use of the native
object can lead to crashing the application.</p>
<h4 id="DEP0118">DEP0118: <code>dns.lookup()</code> support for a falsy host name<span><a class="mark" href="#dep0118-dnslookup-support-for-a-falsy-host-name" id="dep0118-dnslookup-support-for-a-falsy-host-name">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0118_dns_lookup_support_for_a_falsy_host_name"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Previous versions of Node.js supported <code>dns.lookup()</code> with a falsy host name
like <code>dns.lookup(false)</code> 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.</p>
<h4 id="DEP0119">DEP0119: <code>process.binding('uv').errname()</code> private API<span><a class="mark" href="#dep0119-processbindinguverrname-private-api" id="dep0119-processbindinguverrname-private-api">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0119_process_binding_uv_errname_private_api"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p><code>process.binding('uv').errname()</code> is deprecated. Please use
<a href="util.html#utilgetsystemerrornameerr"><code>util.getSystemErrorName()</code></a> instead.</p>
<h4 id="DEP0120">DEP0120: Windows Performance Counter support<span><a class="mark" href="#dep0120-windows-performance-counter-support" id="dep0120-windows-performance-counter-support">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0120_windows_performance_counter_support"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v11.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Windows Performance Counter support has been removed from Node.js. The
undocumented <code>COUNTER_NET_SERVER_CONNECTION()</code>,
<code>COUNTER_NET_SERVER_CONNECTION_CLOSE()</code>, <code>COUNTER_HTTP_SERVER_REQUEST()</code>,
<code>COUNTER_HTTP_SERVER_RESPONSE()</code>, <code>COUNTER_HTTP_CLIENT_REQUEST()</code>, and
<code>COUNTER_HTTP_CLIENT_RESPONSE()</code> functions have been deprecated.</p>
<h4 id="DEP0121">DEP0121: <code>net._setSimultaneousAccepts()</code><span><a class="mark" href="#dep0121-net_setsimultaneousaccepts" id="dep0121-net_setsimultaneousaccepts">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0121_net_setsimultaneousaccepts"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The undocumented <code>net._setSimultaneousAccepts()</code> function was originally
intended for debugging and performance tuning when using the
<code>node:child_process</code> and <code>node:cluster</code> modules on Windows. The function is not
generally useful and is being removed. See discussion here:
<a href="https://github.com/nodejs/node/issues/18391">https://github.com/nodejs/node/issues/18391</a></p>
<h4 id="DEP0122">DEP0122: <code>tls</code> <code>Server.prototype.setOptions()</code><span><a class="mark" href="#dep0122-tls-serverprototypesetoptions" id="dep0122-tls-serverprototypesetoptions">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0122_tls_server_prototype_setoptions"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Please use <code>Server.prototype.setSecureContext()</code> instead.</p>
<h4 id="DEP0123">DEP0123: setting the TLS ServerName to an IP address<span><a class="mark" href="#dep0123-setting-the-tls-servername-to-an-ip-address" id="dep0123-setting-the-tls-servername-to-an-ip-address">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0123_setting_the_tls_servername_to_an_ip_address"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Setting the TLS ServerName to an IP address is not permitted by
<a href="https://tools.ietf.org/html/rfc6066#section-3">RFC 6066</a>. This will be ignored in a future version.</p>
<h4 id="DEP0124">DEP0124: using <code>REPLServer.rli</code><span><a class="mark" href="#dep0124-using-replserverrli" id="dep0124-using-replserverrli">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0124_using_replserver_rli"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v15.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>This property is a reference to the instance itself.</p>
<h4 id="DEP0125">DEP0125: <code>require('node:_stream_wrap')</code><span><a class="mark" href="#dep0125-requirenode_stream_wrap" id="dep0125-requirenode_stream_wrap">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0125_require_node_stream_wrap"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>node:_stream_wrap</code> module is deprecated.</p>
<h4 id="DEP0126">DEP0126: <code>timers.active()</code><span><a class="mark" href="#dep0126-timersactive" id="dep0126-timersactive">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0126_timers_active"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.14.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The previously undocumented <code>timers.active()</code> is deprecated.
Please use the publicly documented <a href="timers.html#timeoutrefresh"><code>timeout.refresh()</code></a> instead.
If re-referencing the timeout is necessary, <a href="timers.html#timeoutref"><code>timeout.ref()</code></a> can be used
with no performance impact since Node.js 10.</p>
<h4 id="DEP0127">DEP0127: <code>timers._unrefActive()</code><span><a class="mark" href="#dep0127-timers_unrefactive" id="dep0127-timers_unrefactive">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0127_timers_unrefactive"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v11.14.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The previously undocumented and "private" <code>timers._unrefActive()</code> is deprecated.
Please use the publicly documented <a href="timers.html#timeoutrefresh"><code>timeout.refresh()</code></a> instead.
If unreferencing the timeout is necessary, <a href="timers.html#timeoutunref"><code>timeout.unref()</code></a> can be used
with no performance impact since Node.js 10.</p>
<h4 id="DEP0128">DEP0128: modules with an invalid <code>main</code> entry and an <code>index.js</code> file<span><a class="mark" href="#dep0128-modules-with-an-invalid-main-entry-and-an-indexjs-file" id="dep0128-modules-with-an-invalid-main-entry-and-an-indexjs-file">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0128_modules_with_an_invalid_main_entry_and_an_index_js_file"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v12.0.0</td>
<td><p>Documentation-only.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Modules that have an invalid <code>main</code> entry (e.g., <code>./does-not-exist.js</code>) and
also have an <code>index.js</code> file in the top level directory will resolve the
<code>index.js</code> file. That is deprecated and is going to throw an error in future
Node.js versions.</p>
<h4 id="DEP0129">DEP0129: <code>ChildProcess._channel</code><span><a class="mark" href="#dep0129-childprocess_channel" id="dep0129-childprocess_channel">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0129_childprocess_channel"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v13.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v11.14.0</td>
<td><p>Documentation-only.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>_channel</code> property of child process objects returned by <code>spawn()</code> and
similar functions is not intended for public use. Use <code>ChildProcess.channel</code>
instead.</p>
<h4 id="DEP0130">DEP0130: <code>Module.createRequireFromPath()</code><span><a class="mark" href="#dep0130-modulecreaterequirefrompath" id="dep0130-modulecreaterequirefrompath">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0130_module_createrequirefrompath"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>End-of-life.</p></td></tr>
<tr><td>v13.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v12.2.0</td>
<td><p>Documentation-only.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Use <a href="module.html#modulecreaterequirefilename"><code>module.createRequire()</code></a> instead.</p>
<h4 id="DEP0131">DEP0131: Legacy HTTP parser<span><a class="mark" href="#dep0131-legacy-http-parser" id="dep0131-legacy-http-parser">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0131_legacy_http_parser"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v13.0.0</td>
<td><p>This feature has been removed.</p></td></tr>
<tr><td>v12.22.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v12.3.0</td>
<td><p>Documentation-only.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The legacy HTTP parser, used by default in versions of Node.js prior to 12.0.0,
is deprecated and has been removed in v13.0.0. Prior to v13.0.0, the
<code>--http-parser=legacy</code> command-line flag could be used to revert to using the
legacy parser.</p>
<h4 id="DEP0132">DEP0132: <code>worker.terminate()</code> with callback<span><a class="mark" href="#dep0132-workerterminate-with-callback" id="dep0132-workerterminate-with-callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0132_worker_terminate_with_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.5.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Passing a callback to <a href="worker_threads.html#workerterminate"><code>worker.terminate()</code></a> is deprecated. Use the returned
<code>Promise</code> instead, or a listener to the worker's <code>'exit'</code> event.</p>
<h4 id="DEP0133">DEP0133: <code>http</code> <code>connection</code><span><a class="mark" href="#dep0133-http-connection" id="dep0133-http-connection">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0133_http_connection"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.12.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Prefer <a href="http.html#responsesocket"><code>response.socket</code></a> over <a href="http.html#responseconnection"><code>response.connection</code></a> and
<a href="http.html#requestsocket"><code>request.socket</code></a> over <a href="http.html#requestconnection"><code>request.connection</code></a>.</p>
<h4 id="DEP0134">DEP0134: <code>process._tickCallback</code><span><a class="mark" href="#dep0134-process_tickcallback" id="dep0134-process_tickcallback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0134_process_tickcallback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.12.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>The <code>process._tickCallback</code> property was never documented as
an officially supported API.</p>
<h4 id="DEP0135">DEP0135: <code>WriteStream.open()</code> and <code>ReadStream.open()</code> are internal<span><a class="mark" href="#dep0135-writestreamopen-and-readstreamopen-are-internal" id="dep0135-writestreamopen-and-readstreamopen-are-internal">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0135_writestream_open_and_readstream_open_are_internal"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v13.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><a href="fs.html#class-fswritestream"><code>WriteStream.open()</code></a> and <a href="fs.html#class-fsreadstream"><code>ReadStream.open()</code></a> are undocumented internal
APIs that do not make sense to use in userland. File streams should always be
opened through their corresponding factory methods <a href="fs.html#fscreatewritestreampath-options"><code>fs.createWriteStream()</code></a>
and <a href="fs.html#fscreatereadstreampath-options"><code>fs.createReadStream()</code></a>) or by passing a file descriptor in options.</p>
<h4 id="DEP0136">DEP0136: <code>http</code> <code>finished</code><span><a class="mark" href="#dep0136-http-finished" id="dep0136-http-finished">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0136_http_finished"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v13.4.0, v12.16.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><a href="http.html#responsefinished"><code>response.finished</code></a> indicates whether <a href="http.html#responseenddata-encoding-callback"><code>response.end()</code></a> has been
called, not whether <code>'finish'</code> has been emitted and the underlying data
is flushed.</p>
<p>Use <a href="http.html#responsewritablefinished"><code>response.writableFinished</code></a> or <a href="http.html#responsewritableended"><code>response.writableEnded</code></a>
accordingly instead to avoid the ambiguity.</p>
<p>To maintain existing behavior <code>response.finished</code> should be replaced with
<code>response.writableEnded</code>.</p>
<h4 id="DEP0137">DEP0137: Closing fs.FileHandle on garbage collection<span><a class="mark" href="#dep0137-closing-fsfilehandle-on-garbage-collection" id="dep0137-closing-fsfilehandle-on-garbage-collection">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0137_closing_fs_filehandle_on_garbage_collection"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Allowing a <a href="fs.html#class-filehandle"><code>fs.FileHandle</code></a> object to be closed on garbage collection is
deprecated. In the future, doing so might result in a thrown error that will
terminate the process.</p>
<p>Please ensure that all <code>fs.FileHandle</code> objects are explicitly closed using
<code>FileHandle.prototype.close()</code> when the <code>fs.FileHandle</code> is no longer needed:</p>
<pre><code class="language-js"><span class="hljs-keyword">const</span> fsPromises = <span class="hljs-built_in">require</span>(<span class="hljs-string">'node:fs'</span>).<span class="hljs-property">promises</span>;
<span class="hljs-keyword">async</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">openAndClose</span>(<span class="hljs-params"></span>) {
<span class="hljs-keyword">let</span> filehandle;
<span class="hljs-keyword">try</span> {
filehandle = <span class="hljs-keyword">await</span> fsPromises.<span class="hljs-title function_">open</span>(<span class="hljs-string">'thefile.txt'</span>, <span class="hljs-string">'r'</span>);
} <span class="hljs-keyword">finally</span> {
<span class="hljs-keyword">if</span> (filehandle !== <span class="hljs-literal">undefined</span>)
<span class="hljs-keyword">await</span> filehandle.<span class="hljs-title function_">close</span>();
}
}</code> <button class="copy-button">copy</button></pre>
<h4 id="DEP0138">DEP0138: <code>process.mainModule</code><span><a class="mark" href="#dep0138-processmainmodule" id="dep0138-processmainmodule">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0138_process_mainmodule"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><a href="process.html#processmainmodule"><code>process.mainModule</code></a> is a CommonJS-only feature while <code>process</code> global
object is shared with non-CommonJS environment. Its use within ECMAScript
modules is unsupported.</p>
<p>It is deprecated in favor of <a href="modules.html#accessing-the-main-module"><code>require.main</code></a>, because it serves the same
purpose and is only available on CommonJS environment.</p>
<h4 id="DEP0139">DEP0139: <code>process.umask()</code> with no arguments<span><a class="mark" href="#dep0139-processumask-with-no-arguments" id="dep0139-processumask-with-no-arguments">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0139_process_umask_with_no_arguments"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.0.0, v12.19.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Calling <code>process.umask()</code> with no argument causes the process-wide umask to be
written twice. This introduces a race condition between threads, and is a
potential security vulnerability. There is no safe, cross-platform alternative
API.</p>
<h4 id="DEP0140">DEP0140: Use <code>request.destroy()</code> instead of <code>request.abort()</code><span><a class="mark" href="#dep0140-use-requestdestroy-instead-of-requestabort" id="dep0140-use-requestdestroy-instead-of-requestabort">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0140_use_request_destroy_instead_of_request_abort"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.1.0, v13.14.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Use <a href="http.html#requestdestroyerror"><code>request.destroy()</code></a> instead of <a href="http.html#requestabort"><code>request.abort()</code></a>.</p>
<h4 id="DEP0141">DEP0141: <code>repl.inputStream</code> and <code>repl.outputStream</code><span><a class="mark" href="#dep0141-replinputstream-and-reploutputstream" id="dep0141-replinputstream-and-reploutputstream">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0141_repl_inputstream_and_repl_outputstream"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.3.0</td>
<td><p>Documentation-only (supports [<code>--pending-deprecation</code>][]).</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>The <code>node:repl</code> module exported the input and output stream twice. Use <code>.input</code>
instead of <code>.inputStream</code> and <code>.output</code> instead of <code>.outputStream</code>.</p>
<h4 id="DEP0142">DEP0142: <code>repl._builtinLibs</code><span><a class="mark" href="#dep0142-repl_builtinlibs" id="dep0142-repl_builtinlibs">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0142_repl_builtinlibs"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.3.0</td>
<td><p>Documentation-only (supports [<code>--pending-deprecation</code>][]).</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>node:repl</code> module exports a <code>_builtinLibs</code> property that contains an array
of built-in modules. It was incomplete so far and instead it's better to rely
upon <code>require('node:module').builtinModules</code>.</p>
<h4 id="DEP0143">DEP0143: <code>Transform._transformState</code><span><a class="mark" href="#dep0143-transform_transformstate" id="dep0143-transform_transformstate">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0143_transform_transformstate"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.5.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime
<code>Transform._transformState</code> will be removed in future versions where it is
no longer required due to simplification of the implementation.</p>
<h4 id="DEP0144">DEP0144: <code>module.parent</code><span><a class="mark" href="#dep0144-moduleparent" id="dep0144-moduleparent">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0144_module_parent"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.6.0, v12.19.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>A CommonJS module can access the first module that required it using
<code>module.parent</code>. This feature is deprecated because it does not work
consistently in the presence of ECMAScript modules and because it gives an
inaccurate representation of the CommonJS module graph.</p>
<p>Some modules use it to check if they are the entry point of the current process.
Instead, it is recommended to compare <code>require.main</code> and <code>module</code>:</p>
<pre><code class="language-js"><span class="hljs-keyword">if</span> (<span class="hljs-built_in">require</span>.<span class="hljs-property">main</span> === <span class="hljs-variable language_">module</span>) {
<span class="hljs-comment">// Code section that will run only if current file is the entry point.</span>
}</code> <button class="copy-button">copy</button></pre>
<p>When looking for the CommonJS modules that have required the current one,
<code>require.cache</code> and <code>module.children</code> can be used:</p>
<pre><code class="language-js"><span class="hljs-keyword">const</span> moduleParents = <span class="hljs-title class_">Object</span>.<span class="hljs-title function_">values</span>(<span class="hljs-built_in">require</span>.<span class="hljs-property">cache</span>)
.<span class="hljs-title function_">filter</span>(<span class="hljs-function">(<span class="hljs-params">m</span>) =></span> m.<span class="hljs-property">children</span>.<span class="hljs-title function_">includes</span>(<span class="hljs-variable language_">module</span>));</code> <button class="copy-button">copy</button></pre>
<h4 id="DEP0145">DEP0145: <code>socket.bufferSize</code><span><a class="mark" href="#dep0145-socketbuffersize" id="dep0145-socketbuffersize">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0145_socket_buffersize"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.6.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><a href="net.html#socketbuffersize"><code>socket.bufferSize</code></a> is just an alias for <a href="stream.html#writablewritablelength"><code>writable.writableLength</code></a>.</p>
<h4 id="DEP0146">DEP0146: <code>new crypto.Certificate()</code><span><a class="mark" href="#dep0146-new-cryptocertificate" id="dep0146-new-cryptocertificate">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0146_new_crypto_certificate"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v14.9.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="crypto.html#legacy-api"><code>crypto.Certificate()</code> constructor</a> is deprecated. Use
<a href="crypto.html#class-certificate">static methods of <code>crypto.Certificate()</code></a> instead.</p>
<h4 id="DEP0147">DEP0147: <code>fs.rmdir(path, { recursive: true })</code><span><a class="mark" href="#dep0147-fsrmdirpath--recursive-true-" id="dep0147-fsrmdirpath--recursive-true-">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0147_fs_rmdir_path_recursive_true"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v15.0.0</td>
<td><p>Runtime deprecation for permissive behavior.</p></td></tr>
<tr><td>v14.14.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>In future versions of Node.js, <code>recursive</code> option will be ignored for
<code>fs.rmdir</code>, <code>fs.rmdirSync</code>, and <code>fs.promises.rmdir</code>.</p>
<p>Use <code>fs.rm(path, { recursive: true, force: true })</code>,
<code>fs.rmSync(path, { recursive: true, force: true })</code> or
<code>fs.promises.rm(path, { recursive: true, force: true })</code> instead.</p>
<h4 id="DEP0148">DEP0148: Folder mappings in <code>"exports"</code> (trailing <code>"/"</code>)<span><a class="mark" href="#dep0148-folder-mappings-in-exports-trailing-" id="dep0148-folder-mappings-in-exports-trailing-">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0148_folder_mappings_in_exports_trailing"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v17.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v15.1.0</td>
<td><p>Runtime deprecation for self-referencing imports.</p></td></tr>
<tr><td>v14.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Using a trailing <code>"/"</code> to define subpath folder mappings in the
<a href="packages.html#subpath-exports">subpath exports</a> or <a href="packages.html#subpath-imports">subpath imports</a> fields is deprecated. Use
<a href="packages.html#subpath-patterns">subpath patterns</a> instead.</p>
<h4 id="DEP0149">DEP0149: <code>http.IncomingMessage#connection</code><span><a class="mark" href="#dep0149-httpincomingmessageconnection" id="dep0149-httpincomingmessageconnection">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0149_http_incomingmessage_connection"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only.</p>
<p>Prefer <a href="http.html#messagesocket"><code>message.socket</code></a> over <a href="http.html#messageconnection"><code>message.connection</code></a>.</p>
<h4 id="DEP0150">DEP0150: Changing the value of <code>process.config</code><span><a class="mark" href="#dep0150-changing-the-value-of-processconfig" id="dep0150-changing-the-value-of-processconfig">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0150_changing_the_value_of_process_config"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>process.config</code> property provides access to Node.js compile-time settings.
However, the property is mutable and therefore subject to tampering. The ability
to change the value will be removed in a future version of Node.js.</p>
<h4 id="DEP0151">DEP0151: Main index lookup and extension searching<span><a class="mark" href="#dep0151-main-index-lookup-and-extension-searching" id="dep0151-main-index-lookup-and-extension-searching">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0151_main_index_lookup_and_extension_searching"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v15.8.0, v14.18.0</td>
<td><p>Documentation-only deprecation with <code>--pending-deprecation</code> support.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Previously, <code>index.js</code> and extension searching lookups would apply to
<code>import 'pkg'</code> main entry point resolution, even when resolving ES modules.</p>
<p>With this deprecation, all ES module main entry point resolutions require
an explicit <a href="packages.html#main-entry-point-export"><code>"exports"</code> or <code>"main"</code> entry</a> with the exact file extension.</p>
<h4 id="DEP0152">DEP0152: Extension PerformanceEntry properties<span><a class="mark" href="#dep0152-extension-performanceentry-properties" id="dep0152-extension-performanceentry-properties">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0152_extension_performanceentry_properties"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v16.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>'gc'</code>, <code>'http2'</code>, and <code>'http'</code> <a href="perf_hooks.html#class-performanceentry" class="type"><PerformanceEntry></a> object types have
additional properties assigned to them that provide additional information.
These properties are now available within the standard <code>detail</code> property
of the <code>PerformanceEntry</code> object. The existing accessors have been
deprecated and should no longer be used.</p>
<h4 id="DEP0153">DEP0153: <code>dns.lookup</code> and <code>dnsPromises.lookup</code> options type coercion<span><a class="mark" href="#dep0153-dnslookup-and-dnspromiseslookup-options-type-coercion" id="dep0153-dnslookup-and-dnspromiseslookup-options-type-coercion">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0153_dns_lookup_and_dnspromises_lookup_options_type_coercion"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v17.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v16.8.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Using a non-nullish non-integer value for <code>family</code> option, a non-nullish
non-number value for <code>hints</code> option, a non-nullish non-boolean value for <code>all</code>
option, or a non-nullish non-boolean value for <code>verbatim</code> option in
<a href="dns.html#dnslookuphostname-options-callback"><code>dns.lookup()</code></a> and <a href="dns.html#dnspromiseslookuphostname-options"><code>dnsPromises.lookup()</code></a> throws an
<code>ERR_INVALID_ARG_TYPE</code> error.</p>
<h4 id="DEP0154">DEP0154: RSA-PSS generate key pair options<span><a class="mark" href="#dep0154-rsa-pss-generate-key-pair-options" id="dep0154-rsa-pss-generate-key-pair-options">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0154_rsa_pss_generate_key_pair_options"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v16.10.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>'hash'</code> and <code>'mgf1Hash'</code> options are replaced with <code>'hashAlgorithm'</code>
and <code>'mgf1HashAlgorithm'</code>.</p>
<h4 id="DEP0155">DEP0155: Trailing slashes in pattern specifier resolutions<span><a class="mark" href="#dep0155-trailing-slashes-in-pattern-specifier-resolutions" id="dep0155-trailing-slashes-in-pattern-specifier-resolutions">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0155_trailing_slashes_in_pattern_specifier_resolutions"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v17.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v16.10.0</td>
<td><p>Documentation-only deprecation with <code>--pending-deprecation</code> support.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The remapping of specifiers ending in <code>"/"</code> like <code>import 'pkg/x/'</code> is deprecated
for package <code>"exports"</code> and <code>"imports"</code> pattern resolutions.</p>
<h4 id="DEP0156">DEP0156: <code>.aborted</code> property and <code>'abort'</code>, <code>'aborted'</code> event in <code>http</code><span><a class="mark" href="#dep0156-aborted-property-and-abort-aborted-event-in-http" id="dep0156-aborted-property-and-abort-aborted-event-in-http">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0156_aborted_property_and_abort_aborted_event_in_http"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v17.0.0, v16.12.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Move to <a href="stream.html#stream" class="type"><Stream></a> API instead, as the <a href="http.html#class-httpclientrequest"><code>http.ClientRequest</code></a>,
<a href="http.html#class-httpserverresponse"><code>http.ServerResponse</code></a>, and <a href="http.html#class-httpincomingmessage"><code>http.IncomingMessage</code></a> are all stream-based.
Check <code>stream.destroyed</code> instead of the <code>.aborted</code> property, and listen for
<code>'close'</code> instead of <code>'abort'</code>, <code>'aborted'</code> event.</p>
<p>The <code>.aborted</code> property and <code>'abort'</code> event are only useful for detecting
<code>.abort()</code> calls. For closing a request early, use the Stream
<code>.destroy([error])</code> then check the <code>.destroyed</code> property and <code>'close'</code> event
should have the same effect. The receiving end should also check the
<a href="stream.html#readablereadableended"><code>readable.readableEnded</code></a> value on <a href="http.html#class-httpincomingmessage"><code>http.IncomingMessage</code></a> to get whether
it was an aborted or graceful destroy.</p>
<h4 id="DEP0157">DEP0157: Thenable support in streams<span><a class="mark" href="#dep0157-thenable-support-in-streams" id="dep0157-thenable-support-in-streams">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0157_thenable_support_in_streams"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.0.0</td>
<td><p>End-of-life.</p></td></tr>
<tr><td>v17.2.0, v16.14.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>An undocumented feature of Node.js streams was to support thenables in
implementation methods. This is now deprecated, use callbacks instead and avoid
use of async function for streams implementation methods.</p>
<p>This feature caused users to encounter unexpected problems where the user
implements the function in callback style but uses e.g. an async method which
would cause an error since mixing promise and callback semantics is not valid.</p>
<pre><code class="language-js"><span class="hljs-keyword">const</span> w = <span class="hljs-keyword">new</span> <span class="hljs-title class_">Writable</span>({
<span class="hljs-keyword">async</span> <span class="hljs-title function_">final</span>(<span class="hljs-params">callback</span>) {
<span class="hljs-keyword">await</span> <span class="hljs-title function_">someOp</span>();
<span class="hljs-title function_">callback</span>();
},
});</code> <button class="copy-button">copy</button></pre>
<h4 id="DEP0158">DEP0158: <code>buffer.slice(start, end)</code><span><a class="mark" href="#dep0158-bufferslicestart-end" id="dep0158-bufferslicestart-end">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0158_buffer_slice_start_end"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v17.5.0, v16.15.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>This method was deprecated because it is not compatible with
<code>Uint8Array.prototype.slice()</code>, which is a superclass of <code>Buffer</code>.</p>
<p>Use <a href="buffer.html#bufsubarraystart-end"><code>buffer.subarray</code></a> which does the same thing instead.</p>
<h4 id="DEP0159">DEP0159: <code>ERR_INVALID_CALLBACK</code><span><a class="mark" href="#dep0159-err_invalid_callback" id="dep0159-err_invalid_callback">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0159_err_invalid_callback"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.0.0</td>
<td><p>End-of-Life.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>This error code was removed due to adding more confusion to
the errors used for value type validation.</p>
<h4 id="DEP0160">DEP0160: <code>process.on('multipleResolves', handler)</code><span><a class="mark" href="#dep0160-processonmultipleresolves-handler" id="dep0160-processonmultipleresolves-handler">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0160_process_on_multipleresolves_handler"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v17.6.0, v16.15.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime.</p>
<p>This event was deprecated because it did not work with V8 promise combinators
which diminished its usefulness.</p>
<h4 id="DEP0161">DEP0161: <code>process._getActiveRequests()</code> and <code>process._getActiveHandles()</code><span><a class="mark" href="#dep0161-process_getactiverequests-and-process_getactivehandles" id="dep0161-process_getactiverequests-and-process_getactivehandles">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0161_process_getactiverequests_and_process_getactivehandles"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v17.6.0, v16.15.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <code>process._getActiveHandles()</code> and <code>process._getActiveRequests()</code>
functions are not intended for public use and can be removed in future
releases.</p>
<p>Use <a href="process.html#processgetactiveresourcesinfo"><code>process.getActiveResourcesInfo()</code></a> to get a list of types of active
resources and not the actual references.</p>
<h4 id="DEP0162">DEP0162: <code>fs.write()</code>, <code>fs.writeFileSync()</code> coercion to string<span><a class="mark" href="#dep0162-fswrite-fswritefilesync-coercion-to-string" id="dep0162-fswrite-fswritefilesync-coercion-to-string">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0162_fs_write_fs_writefilesync_coercion_to_string"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v18.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v17.8.0, v16.15.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Implicit coercion of objects with own <code>toString</code> property, passed as second
parameter in <a href="fs.html#fswritefd-buffer-offset-length-position-callback"><code>fs.write()</code></a>, <a href="fs.html#fswritefilefile-data-options-callback"><code>fs.writeFile()</code></a>, <a href="fs.html#fsappendfilepath-data-options-callback"><code>fs.appendFile()</code></a>,
<a href="fs.html#fswritefilesyncfile-data-options"><code>fs.writeFileSync()</code></a>, and <a href="fs.html#fsappendfilesyncpath-data-options"><code>fs.appendFileSync()</code></a> is deprecated.
Convert them to primitive strings.</p>
<h4 id="DEP0163">DEP0163: <code>channel.subscribe(onMessage)</code>, <code>channel.unsubscribe(onMessage)</code><span><a class="mark" href="#dep0163-channelsubscribeonmessage-channelunsubscribeonmessage" id="dep0163-channelsubscribeonmessage-channelunsubscribeonmessage">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0163_channel_subscribe_onmessage_channel_unsubscribe_onmessage"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.7.0, v16.17.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>These methods were deprecated because they can be used in a way which does not
hold the channel reference alive long enough to receive the events.</p>
<p>Use <a href="diagnostics_channel.html#diagnostics_channelsubscribename-onmessage"><code>diagnostics_channel.subscribe(name, onMessage)</code></a> or
<a href="diagnostics_channel.html#diagnostics_channelunsubscribename-onmessage"><code>diagnostics_channel.unsubscribe(name, onMessage)</code></a> which does the same
thing instead.</p>
<h4 id="DEP0164">DEP0164: <code>process.exit(code)</code>, <code>process.exitCode</code> coercion to integer<span><a class="mark" href="#dep0164-processexitcode-processexitcode-coercion-to-integer" id="dep0164-processexitcode-processexitcode-coercion-to-integer">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0164_process_exit_code_process_exitcode_coercion_to_integer"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v19.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v18.10.0, v16.18.0</td>
<td><p>Documentation-only deprecation of <code>process.exitCode</code> integer coercion.</p></td></tr>
<tr><td>v18.7.0, v16.17.0</td>
<td><p>Documentation-only deprecation of <code>process.exit(code)</code> integer coercion.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Values other than <code>undefined</code>, <code>null</code>, integer numbers, and integer strings
(e.g., <code>'1'</code>) are deprecated as value for the <code>code</code> parameter in
<a href="process.html#processexitcode"><code>process.exit()</code></a> and as value to assign to <a href="process.html#processexitcode_1"><code>process.exitCode</code></a>.</p>
<h4 id="DEP0165">DEP0165: <code>--trace-atomics-wait</code><span><a class="mark" href="#dep0165---trace-atomics-wait" id="dep0165---trace-atomics-wait">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0165_trace_atomics_wait"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v18.8.0, v16.18.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <a href="cli.html#--trace-atomics-wait"><code>--trace-atomics-wait</code></a> flag is deprecated because
it uses the V8 hook <code>SetAtomicsWaitCallback</code>,
that will be removed in a future V8 release.</p>
<h4 id="DEP0166">DEP0166: Double slashes in imports and exports targets<span><a class="mark" href="#dep0166-double-slashes-in-imports-and-exports-targets" id="dep0166-double-slashes-in-imports-and-exports-targets">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0166_double_slashes_in_imports_and_exports_targets"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v18.10.0</td>
<td><p>Documentation-only deprecation with <code>--pending-deprecation</code> support.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Package imports and exports targets mapping into paths including a double slash
(of <em>"/"</em> or <em>"\"</em>) are deprecated and will fail with a resolution validation
error in a future release. This same deprecation also applies to pattern matches
starting or ending in a slash.</p>
<h4 id="DEP0167">DEP0167: Weak <code>DiffieHellmanGroup</code> instances (<code>modp1</code>, <code>modp2</code>, <code>modp5</code>)<span><a class="mark" href="#dep0167-weak-diffiehellmangroup-instances-modp1-modp2-modp5" id="dep0167-weak-diffiehellmangroup-instances-modp1-modp2-modp5">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0167_weak_diffiehellmangroup_instances_modp1_modp2_modp5"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.10.0, v16.18.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The well-known MODP groups <code>modp1</code>, <code>modp2</code>, and <code>modp5</code> are deprecated because
they are not secure against practical attacks. See <a href="https://www.rfc-editor.org/rfc/rfc8247#section-2.4">RFC 8247 Section 2.4</a> for
details.</p>
<p>These groups might be removed in future versions of Node.js. Applications that
rely on these groups should evaluate using stronger MODP groups instead.</p>
<h4 id="DEP0168">DEP0168: Unhandled exception in Node-API callbacks<span><a class="mark" href="#dep0168-unhandled-exception-in-node-api-callbacks" id="dep0168-unhandled-exception-in-node-api-callbacks">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0168_unhandled_exception_in_node_api_callbacks"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v18.3.0, v16.17.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The implicit suppression of uncaught exceptions in Node-API callbacks is now
deprecated.</p>
<p>Set the flag <a href="cli.html#--force-node-api-uncaught-exceptions-policy"><code>--force-node-api-uncaught-exceptions-policy</code></a> to force Node.js
to emit an <a href="process.html#event-uncaughtexception"><code>'uncaughtException'</code></a> event if the exception is not handled in
Node-API callbacks.</p>
<h4 id="DEP0169">DEP0169: Insecure url.parse()<span><a class="mark" href="#dep0169-insecure-urlparse" id="dep0169-insecure-urlparse">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0169_insecure_url_parse"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.9.0, v18.17.0</td>
<td><p>Added support for <code>--pending-deprecation</code>.</p></td></tr>
<tr><td>v19.0.0, v18.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p><a href="url.html#urlparseurlstring-parsequerystring-slashesdenotehost"><code>url.parse()</code></a> behavior is not standardized and prone to errors that
have security implications. Use the <a href="url.html#the-whatwg-url-api">WHATWG URL API</a> instead. CVEs are not
issued for <code>url.parse()</code> vulnerabilities.</p>
<h4 id="DEP0170">DEP0170: Invalid port when using <code>url.parse()</code><span><a class="mark" href="#dep0170-invalid-port-when-using-urlparse" id="dep0170-invalid-port-when-using-urlparse">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0170_invalid_port_when_using_url_parse"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v19.2.0, v18.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><a href="url.html#urlparseurlstring-parsequerystring-slashesdenotehost"><code>url.parse()</code></a> accepts URLs with ports that are not numbers. This behavior
might result in host name spoofing with unexpected input. These URLs will throw
an error in future versions of Node.js, as the <a href="url.html#the-whatwg-url-api">WHATWG URL API</a> does already.</p>
<h4 id="DEP0171">DEP0171: Setters for <code>http.IncomingMessage</code> headers and trailers<span><a class="mark" href="#dep0171-setters-for-httpincomingmessage-headers-and-trailers" id="dep0171-setters-for-httpincomingmessage-headers-and-trailers">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0171_setters_for_http_incomingmessage_headers_and_trailers"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v19.3.0, v18.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>In a future version of Node.js, <a href="http.html#messageheaders"><code>message.headers</code></a>,
<a href="http.html#messageheadersdistinct"><code>message.headersDistinct</code></a>, <a href="http.html#messagetrailers"><code>message.trailers</code></a>, and
<a href="http.html#messagetrailersdistinct"><code>message.trailersDistinct</code></a> will be read-only.</p>
<h4 id="DEP0172">DEP0172: The <code>asyncResource</code> property of <code>AsyncResource</code> bound functions<span><a class="mark" href="#dep0172-the-asyncresource-property-of-asyncresource-bound-functions" id="dep0172-the-asyncresource-property-of-asyncresource-bound-functions">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0172_the_asyncresource_property_of_asyncresource_bound_functions"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.0.0</td>
<td><p>Runtime-deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>In a future version of Node.js, the <code>asyncResource</code> property will no longer
be added when a function is bound to an <code>AsyncResource</code>.</p>
<h4 id="DEP0173">DEP0173: the <code>assert.CallTracker</code> class<span><a class="mark" href="#dep0173-the-assertcalltracker-class" id="dep0173-the-assertcalltracker-class">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0173_the_assert_calltracker_class"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.1.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>In a future version of Node.js, <a href="assert.html#class-assertcalltracker"><code>assert.CallTracker</code></a>,
will be removed.
Consider using alternatives such as the <a href="test.html#mocking"><code>mock</code></a> helper function.</p>
<h4 id="DEP0174">DEP0174: calling <code>promisify</code> on a function that returns a <code>Promise</code><span><a class="mark" href="#dep0174-calling-promisify-on-a-function-that-returns-a-promise" id="dep0174-calling-promisify-on-a-function-that-returns-a-promise">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0174_calling_promisify_on_a_function_that_returns_a_promise"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v21.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v20.8.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Calling <a href="util.html#utilpromisifyoriginal"><code>util.promisify</code></a> on a function that returns a <promise> will ignore
the result of said promise, which can lead to unhandled promise rejections.</promise></p>
<h4 id="DEP0175">DEP0175: <code>util.toUSVString</code><span><a class="mark" href="#dep0175-utiltousvstring" id="dep0175-utiltousvstring">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0175_util_tousvstring"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.8.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#utiltousvstringstring"><code>util.toUSVString()</code></a> API is deprecated. Please use
<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toWellFormed"><code>String.prototype.toWellFormed</code></a> instead.</p>
<h4 id="DEP0176">DEP0176: <code>fs.F_OK</code>, <code>fs.R_OK</code>, <code>fs.W_OK</code>, <code>fs.X_OK</code><span><a class="mark" href="#dep0176-fsf_ok-fsr_ok-fsw_ok-fsx_ok" id="dep0176-fsf_ok-fsr_ok-fsw_ok-fsx_ok">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0176_fs_f_ok_fs_r_ok_fs_w_ok_fs_x_ok"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v20.8.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><code>F_OK</code>, <code>R_OK</code>, <code>W_OK</code> and <code>X_OK</code> getters exposed directly on <code>node:fs</code> are
deprecated. Get them from <code>fs.constants</code> or <code>fs.promises.constants</code> instead.</p>
<h4 id="DEP0177">DEP0177: <code>util.types.isWebAssemblyCompiledModule</code><span><a class="mark" href="#dep0177-utiltypesiswebassemblycompiledmodule" id="dep0177-utiltypesiswebassemblycompiledmodule">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0177_util_types_iswebassemblycompiledmodule"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v21.7.0, v20.12.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v21.3.0, v20.11.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v14.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>The <code>util.types.isWebAssemblyCompiledModule</code> API has been removed.
Please use <code>value instanceof WebAssembly.Module</code> instead.</p>
<h4 id="DEP0178">DEP0178: <code>dirent.path</code><span><a class="mark" href="#dep0178-direntpath" id="dep0178-direntpath">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0178_dirent_path"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v21.5.0, v20.12.0, v18.20.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="fs.html#direntpath"><code>dirent.path</code></a> is deprecated due to its lack of consistency across
release lines. Please use <a href="fs.html#direntparentpath"><code>dirent.parentPath</code></a> instead.</p>
<h4 id="DEP0179">DEP0179: <code>Hash</code> constructor<span><a class="mark" href="#dep0179-hash-constructor" id="dep0179-hash-constructor">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0179_hash_constructor"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v21.5.0, v20.12.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Calling <code>Hash</code> class directly with <code>Hash()</code> or <code>new Hash()</code> is
deprecated due to being internals, not intended for public use.
Please use the <a href="crypto.html#cryptocreatehashalgorithm-options"><code>crypto.createHash()</code></a> method to create Hash instances.</p>
<h4 id="DEP0180">DEP0180: <code>fs.Stats</code> constructor<span><a class="mark" href="#dep0180-fsstats-constructor" id="dep0180-fsstats-constructor">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0180_fs_stats_constructor"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v22.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Calling <code>fs.Stats</code> class directly with <code>Stats()</code> or <code>new Stats()</code> is
deprecated due to being internals, not intended for public use.</p>
<h4 id="DEP0181">DEP0181: <code>Hmac</code> constructor<span><a class="mark" href="#dep0181-hmac-constructor" id="dep0181-hmac-constructor">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0181_hmac_constructor"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
<tr><td>v22.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Calling <code>Hmac</code> class directly with <code>Hmac()</code> or <code>new Hmac()</code> is
deprecated due to being internals, not intended for public use.
Please use the <a href="crypto.html#cryptocreatehmacalgorithm-key-options"><code>crypto.createHmac()</code></a> method to create Hmac instances.</p>
<h4 id="DEP0182">DEP0182: Short GCM authentication tags without explicit <code>authTagLength</code><span><a class="mark" href="#dep0182-short-gcm-authentication-tags-without-explicit-authtaglength" id="dep0182-short-gcm-authentication-tags-without-explicit-authtaglength">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0182_short_gcm_authentication_tags_without_explicit_authtaglength"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only (supports <a href="cli.html#--pending-deprecation"><code>--pending-deprecation</code></a>)</p>
<p>Applications that intend to use authentication tags that are shorter than the
default authentication tag length should set the <code>authTagLength</code> option of the
<a href="crypto.html#cryptocreatedecipherivalgorithm-key-iv-options"><code>crypto.createDecipheriv()</code></a> function to the appropriate length.</p>
<p>For ciphers in GCM mode, the <a href="crypto.html#deciphersetauthtagbuffer-encoding"><code>decipher.setAuthTag()</code></a> function accepts
authentication tags of any valid length (see <a href="#DEP0090">DEP0090</a>). This behavior
is deprecated to better align with recommendations per <a href="https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf">NIST SP 800-38D</a>.</p>
<h4 id="DEP0183">DEP0183: OpenSSL engine-based APIs<span><a class="mark" href="#dep0183-openssl-engine-based-apis" id="dep0183-openssl-engine-based-apis">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0183_openssl_engine_based_apis"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.4.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>OpenSSL 3 has deprecated support for custom engines with a recommendation to
switch to its new provider model. The <code>clientCertEngine</code> option for
<code>https.request()</code>, <a href="tls.html#tlscreatesecurecontextoptions"><code>tls.createSecureContext()</code></a>, and <a href="tls.html#tlscreateserveroptions-secureconnectionlistener"><code>tls.createServer()</code></a>;
the <code>privateKeyEngine</code> and <code>privateKeyIdentifier</code> for <a href="tls.html#tlscreatesecurecontextoptions"><code>tls.createSecureContext()</code></a>;
and <a href="crypto.html#cryptosetengineengine-flags"><code>crypto.setEngine()</code></a> all depend on this functionality from OpenSSL.</p>
<h4 id="DEP0184">DEP0184: Instantiating <code>node:zlib</code> classes without <code>new</code><span><a class="mark" href="#dep0184-instantiating-nodezlib-classes-without-new" id="dep0184-instantiating-nodezlib-classes-without-new">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0184_instantiating_node_zlib_classes_without_new"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.9.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Instantiating classes without the <code>new</code> qualifier exported by the <code>node:zlib</code> module is deprecated.
It is recommended to use the <code>new</code> qualifier instead. This applies to all Zlib classes, such as <code>Deflate</code>,
<code>DeflateRaw</code>, <code>Gunzip</code>, <code>Inflate</code>, <code>InflateRaw</code>, <code>Unzip</code>, and <code>Zlib</code>.</p>
<h4 id="DEP0185">DEP0185: Instantiating <code>node:repl</code> classes without <code>new</code><span><a class="mark" href="#dep0185-instantiating-noderepl-classes-without-new" id="dep0185-instantiating-noderepl-classes-without-new">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0185_instantiating_node_repl_classes_without_new"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.9.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Instantiating classes without the <code>new</code> qualifier exported by the <code>node:repl</code> module is deprecated.
It is recommended to use the <code>new</code> qualifier instead. This applies to all REPL classes, including
<code>REPLServer</code> and <code>Recoverable</code>.</p>
<!-- md-lint skip-deprecation DEP0186 -->
<h4 id="DEP0187">DEP0187: Passing invalid argument types to <code>fs.existsSync</code><span><a class="mark" href="#dep0187-passing-invalid-argument-types-to-fsexistssync" id="dep0187-passing-invalid-argument-types-to-fsexistssync">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0187_passing_invalid_argument_types_to_fs_existssync"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.13.0</td>
<td><p>Documentation-only.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Passing non-supported argument types is deprecated and, instead of returning <code>false</code>,
will throw an error in a future version.</p>
<h4 id="DEP0188">DEP0188: <code>process.features.ipv6</code> and <code>process.features.uv</code><span><a class="mark" href="#dep0188-processfeaturesipv6-and-processfeaturesuv" id="dep0188-processfeaturesipv6-and-processfeaturesuv">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0188_process_features_ipv6_and_process_features_uv"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>These properties are unconditionally <code>true</code>. Any checks based on these properties are redundant.</p>
<h4 id="DEP0189">DEP0189: <code>process.features.tls_*</code><span><a class="mark" href="#dep0189-processfeaturestls_" id="dep0189-processfeaturestls_">#</a></span><a aria-hidden="true" class="legacy" id="deprecations_dep0189_process_features_tls"></a></h4>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v22.13.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><code>process.features.tls_alpn</code>, <code>process.features.tls_ocsp</code>, and <code>process.features.tls_sni</code> are
deprecated, as their values are guaranteed to be identical to that of <code>process.features.tls</code>.</p></section>
<!-- API END -->
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