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      <div id="toc">
        <h2>Table of Contents</h2>
        <ul>
<li>
<p><a href="#deprecations_deprecated_apis">Deprecated APIs</a></p>
<ul>
<li><a href="#deprecations_revoking_deprecations">Revoking deprecations</a></li>
<li>
<p><a href="#deprecations_list_of_deprecated_apis">List of Deprecated APIs</a></p>
<ul>
<li><a href="#deprecations_dep0001_http_outgoingmessage_prototype_flush">DEP0001: http.OutgoingMessage.prototype.flush</a></li>
<li><a href="#deprecations_dep0002_require_linklist">DEP0002: require('_linklist')</a></li>
<li><a href="#deprecations_dep0003_writablestate_buffer">DEP0003: _writableState.buffer</a></li>
<li><a href="#deprecations_dep0004_cryptostream_prototype_readystate">DEP0004: CryptoStream.prototype.readyState</a></li>
<li><a href="#deprecations_dep0005_buffer_constructor">DEP0005: Buffer() constructor</a></li>
<li><a href="#deprecations_dep0006_child_process_options_customfds">DEP0006: child_process options.customFds</a></li>
<li><a href="#deprecations_dep0007_replace_cluster_worker_suicide_with_worker_exitedafterdisconnect">DEP0007: Replace cluster worker.suicide with worker.exitedAfterDisconnect</a></li>
<li><a href="#deprecations_dep0008_require_constants">DEP0008: require('constants')</a></li>
<li><a href="#deprecations_dep0009_crypto_pbkdf2_without_digest">DEP0009: crypto.pbkdf2 without digest</a></li>
<li><a href="#deprecations_dep0010_crypto_createcredentials">DEP0010: crypto.createCredentials</a></li>
<li><a href="#deprecations_dep0011_crypto_credentials">DEP0011: crypto.Credentials</a></li>
<li><a href="#deprecations_dep0012_domain_dispose">DEP0012: Domain.dispose</a></li>
<li><a href="#deprecations_dep0013_fs_asynchronous_function_without_callback">DEP0013: fs asynchronous function without callback</a></li>
<li><a href="#deprecations_dep0014_fs_read_legacy_string_interface">DEP0014: fs.read legacy String interface</a></li>
<li><a href="#deprecations_dep0015_fs_readsync_legacy_string_interface">DEP0015: fs.readSync legacy String interface</a></li>
<li><a href="#deprecations_dep0016_global_root">DEP0016: GLOBAL/root</a></li>
<li><a href="#deprecations_dep0017_intl_v8breakiterator">DEP0017: Intl.v8BreakIterator</a></li>
<li><a href="#deprecations_dep0018_unhandled_promise_rejections">DEP0018: Unhandled promise rejections</a></li>
<li><a href="#deprecations_dep0019_require_resolved_outside_directory">DEP0019: require('.') resolved outside directory</a></li>
<li><a href="#deprecations_dep0020_server_connections">DEP0020: Server.connections</a></li>
<li><a href="#deprecations_dep0021_server_listenfd">DEP0021: Server.listenFD</a></li>
<li><a href="#deprecations_dep0022_os_tmpdir">DEP0022: os.tmpDir()</a></li>
<li><a href="#deprecations_dep0023_os_getnetworkinterfaces">DEP0023: os.getNetworkInterfaces()</a></li>
<li><a href="#deprecations_dep0024_replserver_prototype_converttocontext">DEP0024: REPLServer.prototype.convertToContext()</a></li>
<li><a href="#deprecations_dep0025_require_sys">DEP0025: require('sys')</a></li>
<li><a href="#deprecations_dep0026_util_print">DEP0026: util.print()</a></li>
<li><a href="#deprecations_dep0027_util_puts">DEP0027: util.puts()</a></li>
<li><a href="#deprecations_dep0028_util_debug">DEP0028: util.debug()</a></li>
<li><a href="#deprecations_dep0029_util_error">DEP0029: util.error()</a></li>
<li><a href="#deprecations_dep0030_slowbuffer">DEP0030: SlowBuffer</a></li>
<li><a href="#deprecations_dep0031_ecdh_setpublickey">DEP0031: ecdh.setPublicKey()</a></li>
<li><a href="#deprecations_dep0032_domain_module">DEP0032: domain module</a></li>
<li><a href="#deprecations_dep0033_eventemitter_listenercount">DEP0033: EventEmitter.listenerCount()</a></li>
<li><a href="#deprecations_dep0034_fs_exists_path_callback">DEP0034: fs.exists(path, callback)</a></li>
<li><a href="#deprecations_dep0035_fs_lchmod_path_mode_callback">DEP0035: fs.lchmod(path, mode, callback)</a></li>
<li><a href="#deprecations_dep0036_fs_lchmodsync_path_mode">DEP0036: fs.lchmodSync(path, mode)</a></li>
<li><a href="#deprecations_dep0037_fs_lchown_path_uid_gid_callback">DEP0037: fs.lchown(path, uid, gid, callback)</a></li>
<li><a href="#deprecations_dep0038_fs_lchownsync_path_uid_gid">DEP0038: fs.lchownSync(path, uid, gid)</a></li>
<li><a href="#deprecations_dep0039_require_extensions">DEP0039: require.extensions</a></li>
<li><a href="#deprecations_dep0040_punycode_module">DEP0040: punycode module</a></li>
<li><a href="#deprecations_dep0041_node_repl_history_file_environment_variable">DEP0041: NODE_REPL_HISTORY_FILE environment variable</a></li>
<li><a href="#deprecations_dep0042_tls_cryptostream">DEP0042: tls.CryptoStream</a></li>
<li><a href="#deprecations_dep0043_tls_securepair">DEP0043: tls.SecurePair</a></li>
<li><a href="#deprecations_dep0044_util_isarray">DEP0044: util.isArray()</a></li>
<li><a href="#deprecations_dep0045_util_isboolean">DEP0045: util.isBoolean()</a></li>
<li><a href="#deprecations_dep0046_util_isbuffer">DEP0046: util.isBuffer()</a></li>
<li><a href="#deprecations_dep0047_util_isdate">DEP0047: util.isDate()</a></li>
<li><a href="#deprecations_dep0048_util_iserror">DEP0048: util.isError()</a></li>
<li><a href="#deprecations_dep0049_util_isfunction">DEP0049: util.isFunction()</a></li>
<li><a href="#deprecations_dep0050_util_isnull">DEP0050: util.isNull()</a></li>
<li><a href="#deprecations_dep0051_util_isnullorundefined">DEP0051: util.isNullOrUndefined()</a></li>
<li><a href="#deprecations_dep0052_util_isnumber">DEP0052: util.isNumber()</a></li>
<li><a href="#deprecations_dep0053_util_isobject">DEP0053 util.isObject()</a></li>
<li><a href="#deprecations_dep0054_util_isprimitive">DEP0054: util.isPrimitive()</a></li>
<li><a href="#deprecations_dep0055_util_isregexp">DEP0055: util.isRegExp()</a></li>
<li><a href="#deprecations_dep0056_util_isstring">DEP0056: util.isString()</a></li>
<li><a href="#deprecations_dep0057_util_issymbol">DEP0057: util.isSymbol()</a></li>
<li><a href="#deprecations_dep0058_util_isundefined">DEP0058: util.isUndefined()</a></li>
<li><a href="#deprecations_dep0059_util_log">DEP0059: util.log()</a></li>
<li><a href="#deprecations_dep0060_util_extend">DEP0060: util._extend()</a></li>
<li><a href="#deprecations_dep0061_fs_syncwritestream">DEP0061: fs.SyncWriteStream</a></li>
<li><a href="#deprecations_dep0062_node_debug">DEP0062: node --debug</a></li>
<li><a href="#deprecations_dep0063_serverresponse_prototype_writeheader">DEP0063: ServerResponse.prototype.writeHeader()</a></li>
<li><a href="#deprecations_dep0064_tls_createsecurepair">DEP0064: tls.createSecurePair()</a></li>
<li><a href="#deprecations_dep0065_repl_repl_mode_magic_and_node_repl_mode_magic">DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic</a></li>
<li><a href="#deprecations_dep0066_outgoingmessage_headers_outgoingmessage_headernames">DEP0066: outgoingMessage._headers, outgoingMessage._headerNames</a></li>
<li><a href="#deprecations_dep0067_outgoingmessage_prototype_renderheaders">DEP0067: OutgoingMessage.prototype._renderHeaders</a></li>
<li><a href="#deprecations_dep0068_node_debug">DEP0068: node debug</a></li>
<li><a href="#deprecations_dep0069_vm_runindebugcontext_string">DEP0069: vm.runInDebugContext(string)</a></li>
<li><a href="#deprecations_dep0070_async_hooks_currentid">DEP0070: async_hooks.currentId()</a></li>
<li><a href="#deprecations_dep0071_async_hooks_triggerid">DEP0071: async_hooks.triggerId()</a></li>
<li><a href="#deprecations_dep0072_async_hooks_asyncresource_triggerid">DEP0072: async_hooks.AsyncResource.triggerId()</a></li>
<li><a href="#deprecations_dep0073_several_internal_properties_of_net_server">DEP0073: Several internal properties of net.Server</a></li>
<li><a href="#deprecations_dep0074_replserver_bufferedcommand">DEP0074: REPLServer.bufferedCommand</a></li>
<li><a href="#deprecations_dep0075_replserver_parsereplkeyword">DEP0075: REPLServer.parseREPLKeyword()</a></li>
<li><a href="#deprecations_dep0076_tls_parsecertstring">DEP0076: tls.parseCertString()</a></li>
<li><a href="#deprecations_dep0077_module_debug">DEP0077: Module._debug()</a></li>
<li><a href="#deprecations_dep0078_replserver_turnoffeditormode">DEP0078: REPLServer.turnOffEditorMode()</a></li>
<li><a href="#deprecations_dep0079_custom_inspection_function_on_objects_via_inspect">DEP0079: Custom inspection function on Objects via .inspect()</a></li>
<li><a href="#deprecations_dep0080_path_makelong">DEP0080: path._makeLong()</a></li>
<li><a href="#deprecations_dep0081_fs_truncate_using_a_file_descriptor">DEP0081: fs.truncate() using a file descriptor</a></li>
<li><a href="#deprecations_dep0082_replserver_prototype_memory">DEP0082: REPLServer.prototype.memory()</a></li>
<li><a href="#deprecations_dep0083_disabling_ecdh_by_setting_ecdhcurve_to_false">DEP0083: Disabling ECDH by setting ecdhCurve to false</a></li>
<li><a href="#deprecations_dep0084_requiring_bundled_internal_dependencies">DEP0084: requiring bundled internal dependencies</a></li>
<li><a href="#deprecations_dep0085_asynchooks_sensitive_api">DEP0085: AsyncHooks Sensitive API</a></li>
<li><a href="#deprecations_dep0086_remove_runinasyncidscope">DEP0086: Remove runInAsyncIdScope</a></li>
<li><a href="#deprecations_dep0089_require_assert">DEP0089: require('assert')</a></li>
<li><a href="#deprecations_dep0090_invalid_gcm_authentication_tag_lengths">DEP0090: Invalid GCM authentication tag lengths</a></li>
<li><a href="#deprecations_dep0091_crypto_default_encoding">DEP0091: crypto.DEFAULT_ENCODING</a></li>
<li><a href="#deprecations_dep0092_top_level_this_bound_to_module_exports">DEP0092: Top-level <code>this</code> bound to <code>module.exports</code></a></li>
<li><a href="#deprecations_dep0093_crypto_fips_is_deprecated_and_replaced">DEP0093: crypto.fips is deprecated and replaced.</a></li>
<li><a href="#deprecations_dep0094_using_assert_fail_with_more_than_one_argument">DEP0094: Using <code>assert.fail()</code> with more than one argument.</a></li>
<li><a href="#deprecations_dep0095_timers_enroll">DEP0095: timers.enroll()</a></li>
<li><a href="#deprecations_dep0096_timers_unenroll">DEP0096: timers.unenroll()</a></li>
<li><a href="#deprecations_dep0097_makecallback_with_domain_property">DEP0097: MakeCallback with domain property</a></li>
<li><a href="#deprecations_dep0098_asynchooks_embedder_asyncresource_emitbefore_and_asyncresource_emitafter_apis">DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs</a></li>
<li><a href="#deprecations_dep0099_async_context_unaware_node_makecallback_c_apis">DEP0099: async context-unaware node::MakeCallback C++ APIs</a></li>
<li><a href="#deprecations_dep0100_process_assert">DEP0100: process.assert()</a></li>
<li><a href="#deprecations_dep0101_with_lttng">DEP0101: --with-lttng</a></li>
<li><a href="#deprecations_dep0102_using_noassert_in_buffer_read_write_operations">DEP0102: Using <code>noAssert</code> in Buffer#(read|write) operations.</a></li>
<li><a href="#deprecations_dep0103_process_binding_util_is_typechecks">DEP0103: process.binding('util').is[...] typechecks</a></li>
<li><a href="#deprecations_dep0104_process_env_string_coercion">DEP0104: process.env string coercion</a></li>
<li><a href="#deprecations_dep0105_decipher_finaltol">DEP0105: decipher.finaltol</a></li>
<li><a href="#deprecations_dep0106_crypto_createcipher_and_crypto_createdecipher">DEP0106: crypto.createCipher and crypto.createDecipher</a></li>
<li><a href="#deprecations_dep0107_tls_convertnpnprotocols">DEP0107: tls.convertNPNProtocols()</a></li>
<li><a href="#deprecations_dep0108_zlib_bytesread">DEP0108: zlib.bytesRead</a></li>
<li><a href="#deprecations_dep0110_vm_script_cached_data">DEP0110: vm.Script cached data</a></li>
<li><a href="#deprecations_dep0111_process_binding">DEP0111: process.binding()</a></li>
</ul>
</li>
</ul>
</li>
</ul>
      </div>

      <div id="apicontent">
        <h1>Deprecated APIs<span><a class="mark" href="#deprecations_deprecated_apis" id="deprecations_deprecated_apis">#</a></span></h1>


<p>Node.js may deprecate APIs when either: (a) use of the API is considered to be
unsafe, (b) an improved alternative API is available, or (c) breaking changes to
the API are expected in a future major release.</p>
<p>Node.js utilizes three kinds of Deprecations:</p>
<ul>
<li>Documentation-only</li>
<li>Runtime</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#cli_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="#deprecations_list_of_deprecated_apis">list of Deprecated APIs</a>.</p>
<p>A Runtime deprecation will, by default, generate a process warning that will
be printed to <code>stderr</code> the first time the deprecated API is used. When the
<code>--throw-deprecation</code> command-line flag is used, a Runtime deprecation will
cause an error to be thrown.</p>
<p>An End-of-Life deprecation is used when functionality is or will soon be removed
from Node.js.</p>
<h2>Revoking deprecations<span><a class="mark" href="#deprecations_revoking_deprecations" id="deprecations_revoking_deprecations">#</a></span></h2>
<p>Occasionally, the deprecation of an API may be reversed. In such situations,
this document will be updated with information relevant to the decision.
However, the deprecation identifier will not be modified.</p>
<h2>List of Deprecated APIs<span><a class="mark" href="#deprecations_list_of_deprecated_apis" id="deprecations_list_of_deprecated_apis">#</a></span></h2>
<p><a id="DEP0001"></a></p>
<h3>DEP0001: http.OutgoingMessage.prototype.flush<span><a class="mark" href="#deprecations_dep0001_http_outgoingmessage_prototype_flush" id="deprecations_dep0001_http_outgoingmessage_prototype_flush">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <code>OutgoingMessage.prototype.flush()</code> method is deprecated. Use
<code>OutgoingMessage.prototype.flushHeaders()</code> instead.</p>
<p><a id="DEP0002"></a></p>
<h3>DEP0002: require('_linklist')<span><a class="mark" href="#deprecations_dep0002_require_linklist" id="deprecations_dep0002_require_linklist">#</a></span></h3>
<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>
<p><a id="DEP0003"></a></p>
<h3>DEP0003: _writableState.buffer<span><a class="mark" href="#deprecations_dep0003_writablestate_buffer" id="deprecations_dep0003_writablestate_buffer">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <code>_writableState.buffer</code> property is deprecated. Use the
<code>_writableState.getBuffer()</code> method instead.</p>
<p><a id="DEP0004"></a></p>
<h3>DEP0004: CryptoStream.prototype.readyState<span><a class="mark" href="#deprecations_dep0004_cryptostream_prototype_readystate" id="deprecations_dep0004_cryptostream_prototype_readystate">#</a></span></h3>
<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>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>0.4.0</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>
<p><a id="DEP0005"></a></p>
<h3>DEP0005: Buffer() constructor<span><a class="mark" href="#deprecations_dep0005_buffer_constructor" id="deprecations_dep0005_buffer_constructor">#</a></span></h3>
<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: Runtime (supports <a href="cli.html#cli_pending_deprecation"><code>--pending-deprecation</code></a>)</p>
<p>The <code>Buffer()</code> function and <code>new Buffer()</code> constructor are deprecated due to
API usability issues that can potentially lead to accidental security issues.</p>
<p>As an alternative, use of the following methods of constructing <code>Buffer</code> objects
is strongly recommended:</p>
<ul>
<li><a href="buffer.html#buffer_class_method_buffer_alloc_size_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#buffer_class_method_buffer_allocunsafe_size"><code>Buffer.allocUnsafe(size)</code></a> - Create a <code>Buffer</code> with
<em>uninitialized</em> memory.</li>
<li><a href="buffer.html#buffer_class_method_buffer_allocunsafeslow_size"><code>Buffer.allocUnsafeSlow(size)</code></a> - Create a <code>Buffer</code> with <em>uninitialized</em>
memory.</li>
<li><a href="buffer.html#buffer_class_method_buffer_from_array"><code>Buffer.from(array)</code></a> - Create a <code>Buffer</code> with a copy of <code>array</code></li>
<li><a href="buffer.html#buffer_class_method_buffer_from_arraybuffer_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#buffer_class_method_buffer_from_buffer"><code>Buffer.from(buffer)</code></a> - Create a <code>Buffer</code> that copies <code>buffer</code>.</li>
<li><a href="buffer.html#buffer_class_method_buffer_from_string_encoding"><code>Buffer.from(string[, encoding])</code></a> - Create a <code>Buffer</code>
that copies <code>string</code>.</li>
</ul>
<p>As of v10.0.0, a deprecation warning is printed at runtime when
<code>--pending-deprecation</code> is used or when the calling code is
outside <code>node_modules</code> in order to better target developers, rather than users.</p>
<p><a id="DEP0006"></a></p>
<h3>DEP0006: child_process options.customFds<span><a class="mark" href="#deprecations_dep0006_child_process_options_customfds" id="deprecations_dep0006_child_process_options_customfds">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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>v0.5.11</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</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>
<p><a id="DEP0007"></a></p>
<h3>DEP0007: Replace cluster worker.suicide with worker.exitedAfterDisconnect<span><a class="mark" href="#deprecations_dep0007_replace_cluster_worker_suicide_with_worker_exitedafterdisconnect" id="deprecations_dep0007_replace_cluster_worker_suicide_with_worker_exitedafterdisconnect">#</a></span></h3>
<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#cluster_worker_exitedafterdisconnect"><code>worker.exitedAfterDisconnect</code></a> property. The old property name did not
precisely describe the actual semantics and was unnecessarily emotion-laden.</p>
<p><a id="DEP0008"></a></p>
<h3>DEP0008: require('constants')<span><a class="mark" href="#deprecations_dep0008_require_constants" id="deprecations_dep0008_require_constants">#</a></span></h3>
<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>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('fs').constants</code> and <code>require('os').constants</code>.</p>
<p><a id="DEP0009"></a></p>
<h3>DEP0009: crypto.pbkdf2 without digest<span><a class="mark" href="#deprecations_dep0009_crypto_pbkdf2_without_digest" id="deprecations_dep0009_crypto_pbkdf2_without_digest">#</a></span></h3>
<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>v6.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: End-of-Life</p>
<p>Use of the <a href="crypto.html#crypto_crypto_pbkdf2_password_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 an
undefined <code>digest</code> will throw a <code>TypeError</code>.</p>
<p><a id="DEP0010"></a></p>
<h3>DEP0010: crypto.createCredentials<span><a class="mark" href="#deprecations_dep0010_crypto_createcredentials" id="deprecations_dep0010_crypto_createcredentials">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="crypto.html#crypto_crypto_createcredentials_details"><code>crypto.createCredentials()</code></a> API is deprecated. Please use
<a href="tls.html#tls_tls_createsecurecontext_options"><code>tls.createSecureContext()</code></a> instead.</p>
<p><a id="DEP0011"></a></p>
<h3>DEP0011: crypto.Credentials<span><a class="mark" href="#deprecations_dep0011_crypto_credentials" id="deprecations_dep0011_crypto_credentials">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <code>crypto.Credentials</code> class is deprecated. Please use <a href="tls.html#tls_tls_createsecurecontext_options"><code>tls.SecureContext</code></a>
instead.</p>
<p><a id="DEP0012"></a></p>
<h3>DEP0012: Domain.dispose<span><a class="mark" href="#deprecations_dep0012_domain_dispose" id="deprecations_dep0012_domain_dispose">#</a></span></h3>
<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>v4.8.6, v6.12.0</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>
<p><a id="DEP0013"></a></p>
<h3>DEP0013: fs asynchronous function without callback<span><a class="mark" href="#deprecations_dep0013_fs_asynchronous_function_without_callback" id="deprecations_dep0013_fs_asynchronous_function_without_callback">#</a></span></h3>
<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>
<p><a id="DEP0014"></a></p>
<h3>DEP0014: fs.read legacy String interface<span><a class="mark" href="#deprecations_dep0014_fs_read_legacy_string_interface" id="deprecations_dep0014_fs_read_legacy_string_interface">#</a></span></h3>
<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>v4.8.6, v6.12.0</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#fs_fs_read_fd_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>
<p><a id="DEP0015"></a></p>
<h3>DEP0015: fs.readSync legacy String interface<span><a class="mark" href="#deprecations_dep0015_fs_readsync_legacy_string_interface" id="deprecations_dep0015_fs_readsync_legacy_string_interface">#</a></span></h3>
<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>v4.8.6, v6.12.0</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#fs_fs_readsync_fd_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>
<p><a id="DEP0016"></a></p>
<h3>DEP0016: GLOBAL/root<span><a class="mark" href="#deprecations_dep0016_global_root" id="deprecations_dep0016_global_root">#</a></span></h3>
<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>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>GLOBAL</code> and <code>root</code> aliases for the <code>global</code> property are deprecated
and should no longer be used.</p>
<p><a id="DEP0017"></a></p>
<h3>DEP0017: Intl.v8BreakIterator<span><a class="mark" href="#deprecations_dep0017_intl_v8breakiterator" id="deprecations_dep0017_intl_v8breakiterator">#</a></span></h3>
<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>
<p><a id="DEP0018"></a></p>
<h3>DEP0018: Unhandled promise rejections<span><a class="mark" href="#deprecations_dep0018_unhandled_promise_rejections" id="deprecations_dep0018_unhandled_promise_rejections">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Unhandled promise rejections are deprecated. In the future, promise rejections
that are not handled will terminate the Node.js process with a non-zero exit
code.</p>
<p><a id="DEP0019"></a></p>
<h3>DEP0019: require('.') resolved outside directory<span><a class="mark" href="#deprecations_dep0019_require_resolved_outside_directory" id="deprecations_dep0019_require_resolved_outside_directory">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>In certain cases, <code>require('.')</code> may resolve outside the package directory.
This behavior is deprecated and will be removed in a future major Node.js
release.</p>
<p><a id="DEP0020"></a></p>
<h3>DEP0020: Server.connections<span><a class="mark" href="#deprecations_dep0020_server_connections" id="deprecations_dep0020_server_connections">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="net.html#net_server_connections"><code>Server.connections</code></a> property is deprecated. Please use the
<a href="net.html#net_server_getconnections_callback"><code>Server.getConnections()</code></a> method instead.</p>
<p><a id="DEP0021"></a></p>
<h3>DEP0021: Server.listenFD<span><a class="mark" href="#deprecations_dep0021_server_listenfd" id="deprecations_dep0021_server_listenfd">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <code>Server.listenFD()</code> method is deprecated. Please use
<a href="net.html#net_server_listen_handle_backlog_callback"><code>Server.listen({fd: &#x3C;number>})</code></a> instead.</p>
<p><a id="DEP0022"></a></p>
<h3>DEP0022: os.tmpDir()<span><a class="mark" href="#deprecations_dep0022_os_tmpdir" id="deprecations_dep0022_os_tmpdir">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v7.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>os.tmpDir()</code> API is deprecated. Please use <a href="os.html#os_os_tmpdir"><code>os.tmpdir()</code></a> instead.</p>
<p><a id="DEP0023"></a></p>
<h3>DEP0023: os.getNetworkInterfaces()<span><a class="mark" href="#deprecations_dep0023_os_getnetworkinterfaces" id="deprecations_dep0023_os_getnetworkinterfaces">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <code>os.getNetworkInterfaces()</code> method is deprecated. Please use the
<a href="os.html#os_os_networkinterfaces"><code>os.networkInterfaces</code></a> property instead.</p>
<p><a id="DEP0024"></a></p>
<h3>DEP0024: REPLServer.prototype.convertToContext()<span><a class="mark" href="#deprecations_dep0024_replserver_prototype_converttocontext" id="deprecations_dep0024_replserver_prototype_converttocontext">#</a></span></h3>
<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>
<p><a id="DEP0025"></a></p>
<h3>DEP0025: require('sys')<span><a class="mark" href="#deprecations_dep0025_require_sys" id="deprecations_dep0025_require_sys">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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>sys</code> module is deprecated. Please use the <a href="util.html"><code>util</code></a> module instead.</p>
<p><a id="DEP0026"></a></p>
<h3>DEP0026: util.print()<span><a class="mark" href="#deprecations_dep0026_util_print" id="deprecations_dep0026_util_print">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="util.html#util_util_print_strings"><code>util.print()</code></a> API is deprecated. Please use <a href="console.html#console_console_log_data_args"><code>console.log()</code></a>
instead.</p>
<p><a id="DEP0027"></a></p>
<h3>DEP0027: util.puts()<span><a class="mark" href="#deprecations_dep0027_util_puts" id="deprecations_dep0027_util_puts">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="util.html#util_util_puts_strings"><code>util.puts()</code></a> API is deprecated. Please use <a href="console.html#console_console_log_data_args"><code>console.log()</code></a> instead.</p>
<p><a id="DEP0028"></a></p>
<h3>DEP0028: util.debug()<span><a class="mark" href="#deprecations_dep0028_util_debug" id="deprecations_dep0028_util_debug">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="util.html#util_util_debug_string"><code>util.debug()</code></a> API is deprecated. Please use <a href="console.html#console_console_error_data_args"><code>console.error()</code></a>
instead.</p>
<p><a id="DEP0029"></a></p>
<h3>DEP0029: util.error()<span><a class="mark" href="#deprecations_dep0029_util_error" id="deprecations_dep0029_util_error">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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: Runtime</p>
<p>The <a href="util.html#util_util_error_strings"><code>util.error()</code></a> API is deprecated. Please use <a href="console.html#console_console_error_data_args"><code>console.error()</code></a>
instead.</p>
<p><a id="DEP0030"></a></p>
<h3>DEP0030: SlowBuffer<span><a class="mark" href="#deprecations_dep0030_slowbuffer" id="deprecations_dep0030_slowbuffer">#</a></span></h3>
<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#buffer_class_slowbuffer"><code>SlowBuffer</code></a> class is deprecated. Please use
<a href="buffer.html#buffer_class_method_buffer_allocunsafeslow_size"><code>Buffer.allocUnsafeSlow(size)</code></a> instead.</p>
<p><a id="DEP0031"></a></p>
<h3>DEP0031: ecdh.setPublicKey()<span><a class="mark" href="#deprecations_dep0031_ecdh_setpublickey" id="deprecations_dep0031_ecdh_setpublickey">#</a></span></h3>
<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#crypto_ecdh_setpublickey_publickey_encoding"><code>ecdh.setPublicKey()</code></a> method is now deprecated as its inclusion in the
API is not useful.</p>
<p><a id="DEP0032"></a></p>
<h3>DEP0032: domain module<span><a class="mark" href="#deprecations_dep0032_domain_module" id="deprecations_dep0032_domain_module">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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>
<p><a id="DEP0033"></a></p>
<h3>DEP0033: EventEmitter.listenerCount()<span><a class="mark" href="#deprecations_dep0033_eventemitter_listenercount" id="deprecations_dep0033_eventemitter_listenercount">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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#events_eventemitter_listenercount_emitter_eventname"><code>EventEmitter.listenerCount(emitter, eventName)</code></a> API is
deprecated. Please use <a href="events.html#events_emitter_listenercount_eventname"><code>emitter.listenerCount(eventName)</code></a> instead.</p>
<p><a id="DEP0034"></a></p>
<h3>DEP0034: fs.exists(path, callback)<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/fs.js#L195">[src]</a><span><a class="mark" href="#deprecations_dep0034_fs_exists_path_callback" id="deprecations_dep0034_fs_exists_path_callback">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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#fs_fs_exists_path_callback"><code>fs.exists(path, callback)</code></a> API is deprecated. Please use
<a href="fs.html#fs_fs_stat_path_options_callback"><code>fs.stat()</code></a> or <a href="fs.html#fs_fs_access_path_mode_callback"><code>fs.access()</code></a> instead.</p>
<p><a id="DEP0035"></a></p>
<h3>DEP0035: fs.lchmod(path, mode, callback)<span><a class="mark" href="#deprecations_dep0035_fs_lchmod_path_mode_callback" id="deprecations_dep0035_fs_lchmod_path_mode_callback">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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#fs_fs_lchmod_path_mode_callback"><code>fs.lchmod(path, mode, callback)</code></a> API is deprecated.</p>
<p><a id="DEP0036"></a></p>
<h3>DEP0036: fs.lchmodSync(path, mode)<span><a class="mark" href="#deprecations_dep0036_fs_lchmodsync_path_mode" id="deprecations_dep0036_fs_lchmodsync_path_mode">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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#fs_fs_lchmodsync_path_mode"><code>fs.lchmodSync(path, mode)</code></a> API is deprecated.</p>
<p><a id="DEP0037"></a></p>
<h3>DEP0037: fs.lchown(path, uid, gid, callback)<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/fs.js#L1030">[src]</a><span><a class="mark" href="#deprecations_dep0037_fs_lchown_path_uid_gid_callback" id="deprecations_dep0037_fs_lchown_path_uid_gid_callback">#</a></span></h3>
<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>v4.8.6, v6.12.0</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#fs_fs_lchown_path_uid_gid_callback"><code>fs.lchown(path, uid, gid, callback)</code></a> API is deprecated.</p>
<p><a id="DEP0038"></a></p>
<h3>DEP0038: fs.lchownSync(path, uid, gid)<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/fs.js#L1041">[src]</a><span><a class="mark" href="#deprecations_dep0038_fs_lchownsync_path_uid_gid" id="deprecations_dep0038_fs_lchownsync_path_uid_gid">#</a></span></h3>
<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>v4.8.6, v6.12.0</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#fs_fs_lchownsync_path_uid_gid"><code>fs.lchownSync(path, uid, gid)</code></a> API is deprecated.</p>
<p><a id="DEP0039"></a></p>
<h3>DEP0039: require.extensions<span><a class="mark" href="#deprecations_dep0039_require_extensions" id="deprecations_dep0039_require_extensions">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</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#modules_require_extensions"><code>require.extensions</code></a> property is deprecated.</p>
<p><a id="DEP0040"></a></p>
<h3>DEP0040: punycode module<span><a class="mark" href="#deprecations_dep0040_punycode_module" id="deprecations_dep0040_punycode_module">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v7.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="punycode.html"><code>punycode</code></a> module is deprecated. Please use a userland alternative
instead.</p>
<p><a id="DEP0041"></a></p>
<h3>DEP0041: NODE_REPL_HISTORY_FILE environment variable<span><a class="mark" href="#deprecations_dep0041_node_repl_history_file_environment_variable" id="deprecations_dep0041_node_repl_history_file_environment_variable">#</a></span></h3>
<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>v4.8.6, v6.12.0</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>
<p><a id="DEP0042"></a></p>
<h3>DEP0042: tls.CryptoStream<span><a class="mark" href="#deprecations_dep0042_tls_cryptostream" id="deprecations_dep0042_tls_cryptostream">#</a></span></h3>
<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>v4.8.6, v6.12.0</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#tls_class_cryptostream"><code>tls.CryptoStream</code></a> class was removed. Please use
<a href="tls.html#tls_class_tls_tlssocket"><code>tls.TLSSocket</code></a> instead.</p>
<p><a id="DEP0043"></a></p>
<h3>DEP0043: tls.SecurePair<span><a class="mark" href="#deprecations_dep0043_tls_securepair" id="deprecations_dep0043_tls_securepair">#</a></span></h3>
<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#tls_class_securepair"><code>tls.SecurePair</code></a> class is deprecated. Please use
<a href="tls.html#tls_class_tls_tlssocket"><code>tls.TLSSocket</code></a> instead.</p>
<p><a id="DEP0044"></a></p>
<h3>DEP0044: util.isArray()<span><a class="mark" href="#deprecations_dep0044_util_isarray" id="deprecations_dep0044_util_isarray">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isarray_object"><code>util.isArray()</code></a> API is deprecated. Please use <code>Array.isArray()</code>
instead.</p>
<p><a id="DEP0045"></a></p>
<h3>DEP0045: util.isBoolean()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L197">[src]</a><span><a class="mark" href="#deprecations_dep0045_util_isboolean" id="deprecations_dep0045_util_isboolean">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isboolean_object"><code>util.isBoolean()</code></a> API is deprecated.</p>
<p><a id="DEP0046"></a></p>
<h3>DEP0046: util.isBuffer()<span><a class="mark" href="#deprecations_dep0046_util_isbuffer" id="deprecations_dep0046_util_isbuffer">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isbuffer_object"><code>util.isBuffer()</code></a> API is deprecated. Please use
<a href="buffer.html#buffer_class_method_buffer_isbuffer_obj"><code>Buffer.isBuffer()</code></a> instead.</p>
<p><a id="DEP0047"></a></p>
<h3>DEP0047: util.isDate()<span><a class="mark" href="#deprecations_dep0047_util_isdate" id="deprecations_dep0047_util_isdate">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isdate_object"><code>util.isDate()</code></a> API is deprecated.</p>
<p><a id="DEP0048"></a></p>
<h3>DEP0048: util.isError()<span><a class="mark" href="#deprecations_dep0048_util_iserror" id="deprecations_dep0048_util_iserror">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_iserror_object"><code>util.isError()</code></a> API is deprecated.</p>
<p><a id="DEP0049"></a></p>
<h3>DEP0049: util.isFunction()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L229">[src]</a><span><a class="mark" href="#deprecations_dep0049_util_isfunction" id="deprecations_dep0049_util_isfunction">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isfunction_object"><code>util.isFunction()</code></a> API is deprecated.</p>
<p><a id="DEP0050"></a></p>
<h3>DEP0050: util.isNull()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L201">[src]</a><span><a class="mark" href="#deprecations_dep0050_util_isnull" id="deprecations_dep0050_util_isnull">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isnull_object"><code>util.isNull()</code></a> API is deprecated.</p>
<p><a id="DEP0051"></a></p>
<h3>DEP0051: util.isNullOrUndefined()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L205">[src]</a><span><a class="mark" href="#deprecations_dep0051_util_isnullorundefined" id="deprecations_dep0051_util_isnullorundefined">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isnullorundefined_object"><code>util.isNullOrUndefined()</code></a> API is deprecated.</p>
<p><a id="DEP0052"></a></p>
<h3>DEP0052: util.isNumber()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L209">[src]</a><span><a class="mark" href="#deprecations_dep0052_util_isnumber" id="deprecations_dep0052_util_isnumber">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isnumber_object"><code>util.isNumber()</code></a> API is deprecated.</p>
<p><a id="DEP0053"></a></p>
<h3>DEP0053 util.isObject()<span><a class="mark" href="#deprecations_dep0053_util_isobject" id="deprecations_dep0053_util_isobject">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isobject_object"><code>util.isObject()</code></a> API is deprecated.</p>
<p><a id="DEP0054"></a></p>
<h3>DEP0054: util.isPrimitive()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L233">[src]</a><span><a class="mark" href="#deprecations_dep0054_util_isprimitive" id="deprecations_dep0054_util_isprimitive">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isprimitive_object"><code>util.isPrimitive()</code></a> API is deprecated.</p>
<p><a id="DEP0055"></a></p>
<h3>DEP0055: util.isRegExp()<span><a class="mark" href="#deprecations_dep0055_util_isregexp" id="deprecations_dep0055_util_isregexp">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isregexp_object"><code>util.isRegExp()</code></a> API is deprecated.</p>
<p><a id="DEP0056"></a></p>
<h3>DEP0056: util.isString()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L213">[src]</a><span><a class="mark" href="#deprecations_dep0056_util_isstring" id="deprecations_dep0056_util_isstring">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isstring_object"><code>util.isString()</code></a> API is deprecated.</p>
<p><a id="DEP0057"></a></p>
<h3>DEP0057: util.isSymbol()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L217">[src]</a><span><a class="mark" href="#deprecations_dep0057_util_issymbol" id="deprecations_dep0057_util_issymbol">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_issymbol_object"><code>util.isSymbol()</code></a> API is deprecated.</p>
<p><a id="DEP0058"></a></p>
<h3>DEP0058: util.isUndefined()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L221">[src]</a><span><a class="mark" href="#deprecations_dep0058_util_isundefined" id="deprecations_dep0058_util_isundefined">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v4.8.6, v6.12.0</td>
<td><p>A deprecation code has been assigned.</p></td></tr>
<tr><td>v3.3.1, v4.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>The <a href="util.html#util_util_isundefined_object"><code>util.isUndefined()</code></a> API is deprecated.</p>
<p><a id="DEP0059"></a></p>
<h3>DEP0059: util.log()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/util.js#L255">[src]</a><span><a class="mark" href="#deprecations_dep0059_util_log" id="deprecations_dep0059_util_log">#</a></span></h3>
<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="util.html#util_util_log_string"><code>util.log()</code></a> API is deprecated.</p>
<p><a id="DEP0060"></a></p>
<h3>DEP0060: util._extend()<span><a class="mark" href="#deprecations_dep0060_util_extend" id="deprecations_dep0060_util_extend">#</a></span></h3>
<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="util.html#util_util_extend_target_source"><code>util._extend()</code></a> API is deprecated.</p>
<p><a id="DEP0061"></a></p>
<h3>DEP0061: fs.SyncWriteStream<span><a class="mark" href="#deprecations_dep0061_fs_syncwritestream" id="deprecations_dep0061_fs_syncwritestream">#</a></span></h3>
<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>v7.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>The <code>fs.SyncWriteStream</code> class was never intended to be a publicly accessible
API. No alternative API is available. Please use a userland alternative.</p>
<p><a id="DEP0062"></a></p>
<h3>DEP0062: node --debug<span><a class="mark" href="#deprecations_dep0062_node_debug" id="deprecations_dep0062_node_debug">#</a></span></h3>
<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>
</tbody></table>
</details>
</div>
<p>Type: Runtime</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>
<p><a id="DEP0063"></a></p>
<h3>DEP0063: ServerResponse.prototype.writeHeader()<span><a class="mark" href="#deprecations_dep0063_serverresponse_prototype_writeheader" id="deprecations_dep0063_serverresponse_prototype_writeheader">#</a></span></h3>
<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>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>
<p><a id="DEP0064"></a></p>
<h3>DEP0064: tls.createSecurePair()<span><a class="mark" href="#deprecations_dep0064_tls_createsecurepair" id="deprecations_dep0064_tls_createsecurepair">#</a></span></h3>
<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>
<p><a id="DEP0065"></a></p>
<h3>DEP0065: repl.REPL_MODE_MAGIC and NODE_REPL_MODE=magic<span><a class="mark" href="#deprecations_dep0065_repl_repl_mode_magic_and_node_repl_mode_magic" id="deprecations_dep0065_repl_repl_mode_magic_and_node_repl_mode_magic">#</a></span></h3>
<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>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>
<p><a id="DEP0066"></a></p>
<h3>DEP0066: outgoingMessage._headers, outgoingMessage._headerNames<span><a class="mark" href="#deprecations_dep0066_outgoingmessage_headers_outgoingmessage_headernames" id="deprecations_dep0066_outgoingmessage_headers_outgoingmessage_headernames">#</a></span></h3>
<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>http</code> module <code>outgoingMessage._headers</code> and <code>outgoingMessage._headerNames</code>
properties are deprecated. Use one of the public methods
(e.g. <code>outgoingMessage.getHeader()</code>, <code>outgoingMessage.getHeaders()</code>,
<code>outgoingMessage.getHeaderNames()</code>, <code>outgoingMessage.hasHeader()</code>,
<code>outgoingMessage.removeHeader()</code>, <code>outgoingMessage.setHeader()</code>) for working
with outgoing headers.</p>
<p>The <code>outgoingMessage._headers</code> and <code>outgoingMessage._headerNames</code> properties
were never documented as officially supported properties.</p>
<p><a id="DEP0067"></a></p>
<h3>DEP0067: OutgoingMessage.prototype._renderHeaders<span><a class="mark" href="#deprecations_dep0067_outgoingmessage_prototype_renderheaders" id="deprecations_dep0067_outgoingmessage_prototype_renderheaders">#</a></span></h3>
<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>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>
<p><a id="DEP0068"></a></p>
<h3>DEP0068: node debug<span><a class="mark" href="#deprecations_dep0068_node_debug" id="deprecations_dep0068_node_debug">#</a></span></h3>
<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>
</tbody></table>
</details>
</div>
<p>Type: Runtime</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>
<p><a id="DEP0069"></a></p>
<h3>DEP0069: vm.runInDebugContext(string)<span><a class="mark" href="#deprecations_dep0069_vm_runindebugcontext_string" id="deprecations_dep0069_vm_runindebugcontext_string">#</a></span></h3>
<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>
<p><a id="DEP0070"></a></p>
<h3>DEP0070: async_hooks.currentId()<span><a class="mark" href="#deprecations_dep0070_async_hooks_currentid" id="deprecations_dep0070_async_hooks_currentid">#</a></span></h3>
<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>
<p><a id="DEP0071"></a></p>
<h3>DEP0071: async_hooks.triggerId()<span><a class="mark" href="#deprecations_dep0071_async_hooks_triggerid" id="deprecations_dep0071_async_hooks_triggerid">#</a></span></h3>
<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>
<p><a id="DEP0072"></a></p>
<h3>DEP0072: async_hooks.AsyncResource.triggerId()<span><a class="mark" href="#deprecations_dep0072_async_hooks_asyncresource_triggerid" id="deprecations_dep0072_async_hooks_asyncresource_triggerid">#</a></span></h3>
<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>
<p><a id="DEP0073"></a></p>
<h3>DEP0073: Several internal properties of net.Server<span><a class="mark" href="#deprecations_dep0073_several_internal_properties_of_net_server" id="deprecations_dep0073_several_internal_properties_of_net_server">#</a></span></h3>
<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>
<p><a id="DEP0074"></a></p>
<h3>DEP0074: REPLServer.bufferedCommand<span><a class="mark" href="#deprecations_dep0074_replserver_bufferedcommand" id="deprecations_dep0074_replserver_bufferedcommand">#</a></span></h3>
<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>The <code>REPLServer.bufferedCommand</code> property was deprecated in favor of
<a href="repl.html#repl_replserver_clearbufferedcommand"><code>REPLServer.clearBufferedCommand()</code></a>.</p>
<p><a id="DEP0075"></a></p>
<h3>DEP0075: REPLServer.parseREPLKeyword()<span><a class="mark" href="#deprecations_dep0075_replserver_parsereplkeyword" id="deprecations_dep0075_replserver_parsereplkeyword">#</a></span></h3>
<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>REPLServer.parseREPLKeyword()</code> was removed from userland visibility.</p>
<p><a id="DEP0076"></a></p>
<h3>DEP0076: tls.parseCertString()<span><a class="mark" href="#deprecations_dep0076_tls_parsecertstring" id="deprecations_dep0076_tls_parsecertstring">#</a></span></h3>
<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>
<tr><td>v8.6.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p><code>tls.parseCertString()</code> is a trivial parsing helper that was made public by
mistake. This function can usually be replaced with:</p>
<pre><code class="language-js">const querystring = require('querystring');
querystring.parse(str, '\n', '=');
</code></pre>
<p>This function is not completely equivalent to <code>querystring.parse()</code>. One
difference is that <code>querystring.parse()</code> does url decoding:</p>
<pre><code class="language-sh">> querystring.parse('%E5%A5%BD=1', '\n', '=');
{ '好': '1' }
> tls.parseCertString('%E5%A5%BD=1');
{ '%E5%A5%BD': '1' }
</code></pre>
<p><a id="DEP0077"></a></p>
<h3>DEP0077: Module._debug()<span><a class="mark" href="#deprecations_dep0077_module_debug" id="deprecations_dep0077_module_debug">#</a></span></h3>
<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>
<p><a id="DEP0078"></a></p>
<h3>DEP0078: REPLServer.turnOffEditorMode()<span><a class="mark" href="#deprecations_dep0078_replserver_turnoffeditormode" id="deprecations_dep0078_replserver_turnoffeditormode">#</a></span></h3>
<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>REPLServer.turnOffEditorMode()</code> was removed from userland visibility.</p>
<p><a id="DEP0079"></a></p>
<h3>DEP0079: Custom inspection function on Objects via .inspect()<span><a class="mark" href="#deprecations_dep0079_custom_inspection_function_on_objects_via_inspect" id="deprecations_dep0079_custom_inspection_function_on_objects_via_inspect">#</a></span></h3>
<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>v8.7.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</p>
<p>Using a property named <code>inspect</code> on an object to specify a custom inspection
function for <a href="util.html#util_util_inspect_object_options"><code>util.inspect()</code></a> is deprecated. Use <a href="util.html#util_util_inspect_custom"><code>util.inspect.custom</code></a>
instead. For backward compatibility with Node.js prior to version 6.4.0, both
may be specified.</p>
<p><a id="DEP0080"></a></p>
<h3>DEP0080: path._makeLong()<span><a class="mark" href="#deprecations_dep0080_path_makelong" id="deprecations_dep0080_path_makelong">#</a></span></h3>
<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>
<p><a id="DEP0081"></a></p>
<h3>DEP0081: fs.truncate() using a file descriptor<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/fs.js#L601">[src]</a><span><a class="mark" href="#deprecations_dep0081_fs_truncate_using_a_file_descriptor" id="deprecations_dep0081_fs_truncate_using_a_file_descriptor">#</a></span></h3>
<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>
<p><a id="DEP0082"></a></p>
<h3>DEP0082: REPLServer.prototype.memory()<span><a class="mark" href="#deprecations_dep0082_replserver_prototype_memory" id="deprecations_dep0082_replserver_prototype_memory">#</a></span></h3>
<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>REPLServer.prototype.memory()</code> is only necessary for the internal mechanics of
the <code>REPLServer</code> itself. Do not use this function.</p>
<p><a id="DEP0083"></a></p>
<h3>DEP0083: Disabling ECDH by setting ecdhCurve to false<span><a class="mark" href="#deprecations_dep0083_disabling_ecdh_by_setting_ecdhcurve_to_false" id="deprecations_dep0083_disabling_ecdh_by_setting_ecdhcurve_to_false">#</a></span></h3>
<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>
<p><a id="DEP0084"></a></p>
<h3>DEP0084: requiring bundled internal dependencies<span><a class="mark" href="#deprecations_dep0084_requiring_bundled_internal_dependencies" id="deprecations_dep0084_requiring_bundled_internal_dependencies">#</a></span></h3>
<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>Since Node.js versions 4.4.0 and 5.2.0, several modules only intended for
internal usage are mistakenly exposed to user code through <code>require()</code>. These
modules are:</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> may be installed locally through a package
manager, as it is published on the npm registry under the same name. No source
code modification is necessary if that is done.</p>
<p><a id="DEP0085"></a></p>
<h3>DEP0085: AsyncHooks Sensitive API<span><a class="mark" href="#deprecations_dep0085_asynchooks_sensitive_api" id="deprecations_dep0085_asynchooks_sensitive_api">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.10.0, v9.4.0</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.
(See <a href="https://github.com/nodejs/node/issues/15572">https://github.com/nodejs/node/issues/15572</a>.) Use the <code>AsyncResource</code>
API instead.</p>
<p><a id="DEP0086"></a></p>
<h3>DEP0086: Remove runInAsyncIdScope<span><a class="mark" href="#deprecations_dep0086_remove_runinasyncidscope" id="deprecations_dep0086_remove_runinasyncidscope">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>10.0.0</td>
<td><p>End-of-Life.</p></td></tr>
<tr><td>v8.10.0, v9.4.0</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> for
more details.</p>
<p><a id="DEP0089"></a></p>
<h3>DEP0089: require('assert')<span><a class="mark" href="#deprecations_dep0089_require_assert" id="deprecations_dep0089_require_assert">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.9.0, v10.0.0</td>
<td><p>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p>Importing assert directly is not recommended as the exposed functions will use
loose equality checks. Use <code>require('assert').strict</code> instead. The API is the
same as the legacy assert but it will always use strict equality checks.</p>
<p><a id="DEP0090"></a></p>
<h3>DEP0090: Invalid GCM authentication tag lengths<span><a class="mark" href="#deprecations_dep0090_invalid_gcm_authentication_tag_lengths" id="deprecations_dep0090_invalid_gcm_authentication_tag_lengths">#</a></span></h3>
<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>Node.js supports all GCM authentication tag lengths which are accepted by
OpenSSL when calling <a href="crypto.html#crypto_decipher_setauthtag_buffer"><code>decipher.setAuthTag()</code></a>. This behavior will change in
a future version at which point only authentication tag lengths of 128, 120,
112, 104, 96, 64, and 32 bits will be allowed. Authentication tags whose length
is not included in this list will be considered invalid in compliance with
<a href="https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf">NIST SP 800-38D</a>.</p>
<p><a id="DEP0091"></a></p>
<h3>DEP0091: crypto.DEFAULT_ENCODING<span><a class="mark" href="#deprecations_dep0091_crypto_default_encoding" id="deprecations_dep0091_crypto_default_encoding">#</a></span></h3>
<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>The <a href="crypto.html#crypto_crypto_default_encoding"><code>crypto.DEFAULT_ENCODING</code></a> property is deprecated.</p>
<p><a id="DEP0092"></a></p>
<h3>DEP0092: Top-level <code>this</code> bound to <code>module.exports</code><span><a class="mark" href="#deprecations_dep0092_top_level_this_bound_to_module_exports" id="deprecations_dep0092_top_level_this_bound_to_module_exports">#</a></span></h3>
<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>
<p><a id="DEP0093"></a></p>
<h3>DEP0093: crypto.fips is deprecated and replaced.<span><a class="mark" href="#deprecations_dep0093_crypto_fips_is_deprecated_and_replaced" id="deprecations_dep0093_crypto_fips_is_deprecated_and_replaced">#</a></span></h3>
<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#crypto_crypto_fips"><code>crypto.fips</code></a> property is deprecated. Please use <code>crypto.setFips()</code>
and <code>crypto.getFips()</code> instead.</p>
<p><a id="DEP0094"></a></p>
<h3>DEP0094: Using <code>assert.fail()</code> with more than one argument.<span><a class="mark" href="#deprecations_dep0094_using_assert_fail_with_more_than_one_argument" id="deprecations_dep0094_using_assert_fail_with_more_than_one_argument">#</a></span></h3>
<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>assert</code> module
method.</p>
<p><a id="DEP0095"></a></p>
<h3>DEP0095: timers.enroll()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/timers.js#L366">[src]</a><span><a class="mark" href="#deprecations_dep0095_timers_enroll" id="deprecations_dep0095_timers_enroll">#</a></span></h3>
<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#timers_settimeout_callback_delay_args"><code>setTimeout()</code></a> or <a href="timers.html#timers_setinterval_callback_delay_args"><code>setInterval()</code></a> instead.</p>
<p><a id="DEP0096"></a></p>
<h3>DEP0096: timers.unenroll()<a class="srclink" href="https://github.com/nodejs/node/blob/b401aa24d7ab8b1fb804844df70472c3679696b9/lib/timers.js#L339">[src]</a><span><a class="mark" href="#deprecations_dep0096_timers_unenroll" id="deprecations_dep0096_timers_unenroll">#</a></span></h3>
<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#timers_cleartimeout_timeout"><code>clearTimeout()</code></a> or <a href="timers.html#timers_clearinterval_timeout"><code>clearInterval()</code></a> instead.</p>
<p><a id="DEP0097"></a></p>
<h3>DEP0097: MakeCallback with domain property<span><a class="mark" href="#deprecations_dep0097_makecallback_with_domain_property" id="deprecations_dep0097_makecallback_with_domain_property">#</a></span></h3>
<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>
<p><a id="DEP0098"></a></p>
<h3>DEP0098: AsyncHooks Embedder AsyncResource.emitBefore and AsyncResource.emitAfter APIs<span><a class="mark" href="#deprecations_dep0098_asynchooks_embedder_asyncresource_emitbefore_and_asyncresource_emitafter_apis" id="deprecations_dep0098_asynchooks_embedder_asyncresource_emitbefore_and_asyncresource_emitafter_apis">#</a></span></h3>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v8.12.0, v9.6.0, v10.0.0</td>
<td><p>Runtime deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Runtime</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_hooks.html#async_hooks_asyncresource_runinasyncscope_fn_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> for more details.</p>
<p><a id="DEP0099"></a></p>
<h3>DEP0099: async context-unaware node::MakeCallback C++ APIs<span><a class="mark" href="#deprecations_dep0099_async_context_unaware_node_makecallback_c_apis" id="deprecations_dep0099_async_context_unaware_node_makecallback_c_apis">#</a></span></h3>
<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 modules are
deprecated. Please use the versions of the API that accept an <code>async_context</code>
parameter.</p>
<p><a id="DEP0100"></a></p>
<h3>DEP0100: process.assert()<span><a class="mark" href="#deprecations_dep0100_process_assert" id="deprecations_dep0100_process_assert">#</a></span></h3>
<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>
<p><a id="DEP0101"></a></p>
<h3>DEP0101: --with-lttng<span><a class="mark" href="#deprecations_dep0101_with_lttng" id="deprecations_dep0101_with_lttng">#</a></span></h3>
<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>
<p><a id="DEP0102"></a></p>
<h3>DEP0102: Using <code>noAssert</code> in Buffer#(read|write) operations.<span><a class="mark" href="#deprecations_dep0102_using_noassert_in_buffer_read_write_operations" id="deprecations_dep0102_using_noassert_in_buffer_read_write_operations">#</a></span></h3>
<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 going
to be verified, no matter if it is set to true or not. Skipping the verification
could lead to hard to find errors and crashes.</p>
<p><a id="DEP0103"></a></p>
<h3>DEP0103: process.binding('util').is[...] typechecks<span><a class="mark" href="#deprecations_dep0103_process_binding_util_is_typechecks" id="deprecations_dep0103_process_binding_util_is_typechecks">#</a></span></h3>
<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#cli_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#util_util_types"><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>
<p><a id="DEP0104"></a></p>
<h3>DEP0104: process.env string coercion<span><a class="mark" href="#deprecations_dep0104_process_env_string_coercion" id="deprecations_dep0104_process_env_string_coercion">#</a></span></h3>
<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#cli_pending_deprecation"><code>--pending-deprecation</code></a>)</p>
<p>When assigning a non-string property to <a href="process.html#process_process_env"><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 may
result in a thrown error. Please convert the property to a string before
assigning it to <code>process.env</code>.</p>
<p><a id="DEP0105"></a></p>
<h3>DEP0105: decipher.finaltol<span><a class="mark" href="#deprecations_dep0105_decipher_finaltol" id="deprecations_dep0105_decipher_finaltol">#</a></span></h3>
<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>decipher.finaltol()</code> has never been documented and is currently an alias for
<a href="crypto.html#crypto_decipher_final_outputencoding"><code>decipher.final()</code></a>. In the future, this API will likely be removed, and it
is recommended to use <a href="crypto.html#crypto_decipher_final_outputencoding"><code>decipher.final()</code></a> instead.</p>
<p><a id="DEP0106"></a></p>
<h3>DEP0106: crypto.createCipher and crypto.createDecipher<span><a class="mark" href="#deprecations_dep0106_crypto_createcipher_and_crypto_createdecipher" id="deprecations_dep0106_crypto_createcipher_and_crypto_createdecipher">#</a></span></h3>
<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>Using <a href="crypto.html#crypto_crypto_createcipher_algorithm_password_options"><code>crypto.createCipher()</code></a> and <a href="crypto.html#crypto_crypto_createdecipher_algorithm_password_options"><code>crypto.createDecipher()</code></a> should be
avoided as they use a weak key derivation function (MD5 with no salt) and static
initialization vectors. It is recommended to derive a key using
<a href="crypto.html#crypto_crypto_pbkdf2_password_salt_iterations_keylen_digest_callback"><code>crypto.pbkdf2()</code></a> or <a href="crypto.html#crypto_crypto_scrypt_password_salt_keylen_options_callback"><code>crypto.scrypt()</code></a> and to use
<a href="crypto.html#crypto_crypto_createcipheriv_algorithm_key_iv_options"><code>crypto.createCipheriv()</code></a> and <a href="crypto.html#crypto_crypto_createdecipheriv_algorithm_key_iv_options"><code>crypto.createDecipheriv()</code></a> to obtain the
<a href="crypto.html#crypto_class_cipher"><code>Cipher</code></a> and <a href="crypto.html#crypto_class_decipher"><code>Decipher</code></a> objects respectively.</p>
<p><a id="DEP0107"></a></p>
<h3>DEP0107: tls.convertNPNProtocols()<span><a class="mark" href="#deprecations_dep0107_tls_convertnpnprotocols" id="deprecations_dep0107_tls_convertnpnprotocols">#</a></span></h3>
<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>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>
<p><a id="DEP0108"></a></p>
<h3>DEP0108: zlib.bytesRead<span><a class="mark" href="#deprecations_dep0108_zlib_bytesread" id="deprecations_dep0108_zlib_bytesread">#</a></span></h3>
<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>Deprecated alias for <a href="zlib.html#zlib_zlib_byteswritten"><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>
<p><a id="DEP0110"></a></p>
<h3>DEP0110: vm.Script cached data<span><a class="mark" href="#deprecations_dep0110_vm_script_cached_data" id="deprecations_dep0110_vm_script_cached_data">#</a></span></h3>
<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#vm_script_createcacheddata"><code>script.createCachedData()</code></a> instead.</p>
<p><a id="DEP0111"></a></p>
<h3>DEP0111: process.binding()<span><a class="mark" href="#deprecations_dep0111_process_binding" id="deprecations_dep0111_process_binding">#</a></span></h3>
<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>Documentation-only deprecation.</p></td></tr>
</tbody></table>
</details>
</div>
<p>Type: Documentation-only</p>
<p><code>process.binding()</code> is for use by Node.js internal code only.</p>
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