learnyounode

<!DOCTYPE html><html lang="en"><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>Deprecated APIs | Node.js v12.10.0 Documentation</title> <link rel="stylesheet" href="data:text/css;base64,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"> <link rel="stylesheet" href="data:text/css;base64,/*--------------------- Layout and Typography ----------------------------*/
html {
  font-size: 1rem;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-variant-ligatures: none;
          font-variant-ligatures: none;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background: #fff;
}

h1 { font-size: 2.5rem }
h2 { font-size: 2rem }
h3 { font-size: 1.75rem }
h4 { font-size: 1.5rem }
h5 { font-size: 1.25rem }
h6 { font-size: 1rem }

h1, h2, h3, h4, h5, h6 {
  margin: 1.5rem 0 1rem;
  text-rendering: optimizeLegibility;
  font-weight: 700;
  position: relative;
}

pre, tt, code, .pre, span.type, a.type {
  font-family: SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .9em;
}

#content {
  position: relative;
}

a, a:link, a:active {
  color: #43853d;
  text-decoration: none;
  border-radius: 2px;
  padding: 1px 3px;
}

a:hover, a:focus {
  color: #fff;
  background-color: #43853d;
  outline: none;
}

strong {
  font-weight: 700;
}

code a:hover {
  background: none;
}

em code {
  font-style: normal;
}

#changelog #gtoc {
  display: none;
}

#gtoc {
  margin-top: .5rem;
  margin-bottom: 1rem;
}

#gtoc ul {
  list-style: none;
  margin-left: 0;
  line-height: 1.5rem;
}

#gtoc > ul > li {
  display: inline;
  border-right: 1px #000 solid;
  margin-right: 0.4rem;
  padding-right: 0.4rem;
}

#gtoc > ul > li:last-child {
  border-right: none;
  margin-right: 0;
  padding-right: 0;
}

li.version-picker {
  position: relative;
}

li.version-picker:hover > a {
  border-radius: 2px 2px 0 0;
}

li.version-picker:hover > ol {
  display: block;
  z-index: 1;
}

li.version-picker a span {
  font-size: .7rem;
}

ol.version-picker {
  background: #fff;
  border: 1px #43853d solid;
  border-radius: 0 0 2px 2px;
  display: none;
  list-style: none;
  position: absolute;
  right: 0;
  top: 1.25rem;
  width: 100%;
}

#gtoc ol.version-picker li {
  display: block;
  border-right: 0;
  margin-right: 0;
}

ol.version-picker li a {
  border-radius: 0;
  display: block;
  margin: 0;
  padding: .1rem;
  padding-left: 1rem;
}

ol.version-picker li:last-child a {
  border-bottom-right-radius: 1px;
  border-bottom-left-radius: 1px;
}

.line {
  width: calc(100% - 1rem);
  display: block;
  padding-bottom: 1px;
}

.api_stability {
  color: white !important;
  margin: 0 0 1rem 0;
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  padding: 1rem;
  line-height: 1.5;
}

.api_stability * {
  color: white !important;
}

.api_stability a {
  text-decoration: underline;
}

.api_stability a:hover, .api_stability a:active, .api_stability a:focus {
  background: rgba(255, 255, 255, .4);
}

.api_stability a code {
  background: none;
}

.api_stability_0 {
  background-color: #D60027;
}

.api_stability_1 {
  background-color: #EC5315;
}

.api_stability_2 {
  background-color: #4EBA0F;
}

.api_metadata {
  font-size: .85rem;
  margin-bottom: 1rem;
}

.api_metadata span {
  margin-right: 1rem;
}

.api_metadata span:last-child {
  margin-right: 0px;
}

ul.plain {
  list-style: none;
}

abbr {
  border-bottom: 1px dotted #454545;
}

p {
  text-rendering: optimizeLegibility;
  margin: 0 0 1.125rem 0;
  line-height: 1.5;
}

#apicontent > *:last-child {
  margin-bottom: 0;
  padding-bottom: 2rem;
}

table {
  border-collapse: collapse;
  margin: 0 0 1.5rem 0;
}

th, td {
  border: 1px solid #aaa;
  padding: .75rem 1rem .75rem 1rem;
  vertical-align: top;
}

th {
  text-align:left;
}

ol, ul, dl {
  margin: 0 0 .6rem 0;
  padding: 0;
}

ol ul, ol ol, ol dl, ul ul, ul ol, ul dl, dl ul, dl ol, dl dl {
  margin-bottom: 0;
}

ul, ol {
  margin-left: 2rem;
}

dl dt {
  position: relative;
  margin: 1.5rem 0 0;
}

dl dd {
  position: relative;
  margin: 0 1rem 0;
}

dd + dt.pre {
  margin-top: 1.6rem;
}

#apicontent {
  padding-top: 1rem;
}

#apicontent .line {
  width: calc(50% - 1rem);
  margin: 1rem 1rem .95rem;
  background-color: #ccc;
}

h2 + h2 {
  margin: 0 0 .5rem;
}

h3 + h3 {
  margin: 0 0 .5rem;
}

h2, h3, h4, h5 {
  position: relative;
  padding-right: 40px;
}

.srclink {
  float: right;
  font-size: smaller;
}

h1 span, h2 span, h3 span, h4 span {
  position: absolute;
  display: block;
  top: 0;
  right: 0;
}

h1 span:hover, h2 span:hover, h3 span:hover, h4 span:hover {
  opacity: 1;
}

h1 span a, h2 span a, h3 span a, h4 span a {
  color: #000;
  text-decoration: none;
  font-weight: bold;
}

pre, tt, code {
  line-height: 1.5rem;
  margin: 0; padding: 0;
}

.pre {
  line-height: 1.5rem;
}

pre {
  padding: 1rem;
  vertical-align: top;
  background: #f2f2f2;
  margin: 1rem;
  overflow-x: auto;
}

pre > code {
  padding: 0;
}

pre + h3 {
  margin-top: 2.225rem;
}

code.pre {
  white-space: pre;
}

#intro {
  margin-top: 1.25rem;
  margin-left: 1rem;
}

#intro a {
  color: #ddd;
  font-weight: bold;
}

hr {
  background: none;
  border: medium none;
  border-bottom: 1px solid #7a7a7a;
  margin: 0 0 1rem 0;
}

#toc h2 {
  margin-top: 0;
  margin: 1.5rem 0;
}

#toc p {
  margin: 0;
}

#toc ul a {
  text-decoration:none;
}

#toc ul li {
  margin-bottom: .666rem;
  list-style: square outside;
}

#toc li > ul {
  margin-top: .666rem;
}

#toc .stability_0::after {
  background-color: #d50027;
  color: #fff;
  content: "deprecated";
  margin-left: .25rem;
  padding: 1px 3px;
  border-radius: 3px;
}

#apicontent li {
  margin-bottom: .5rem;
}

#apicontent li:last-child {
  margin-bottom: 0;
}

tt, code {
  color: #040404;
  background-color: #f2f2f2;
  border-radius: 2px;
  padding: 1px 3px;
}

.api_stability code {
  background: rgba(0, 0, 0, .1);
}

a code {
  color: inherit;
  background: inherit;
  padding: 0;
}

.type {
  line-height: 1.5rem;
}

#column1.interior {
  margin-left: 234px;
  padding: 0 2rem;
  -webkit-padding-start: 1.5rem;
}

#column2.interior {
  width: 234px;
  background: #333;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: scroll;
}

#column2 ul {
  list-style: none;
  margin: .9rem 0 .5rem;
  background: #333;
}

#column2 > :first-child {
  margin: 1.25rem;
  font-size: 1.5rem;
}

#column2 > ul:nth-child(2) {
  margin: 1.25rem 0 .5rem;
}

#column2 > ul:last-child {
  margin: .9rem 0 1.25rem;
}

#column2 ul li {
  padding-left: 1.25rem;
  margin-bottom: .5rem;
  padding-bottom: .5rem;
}

#column2 .line {
  margin: 0 .5rem;
  background-color: #707070;
}

#column2 ul li:last-child {
  margin-bottom: 0;
}

#column2 ul li a {
  color: #ccc;
  border-radius: 0;
}

#column2 ul li a.active, #column2 ul li a.active:hover,
#column2 ul li a.active:focus {
  color: #43853d;
  border-radius: 0;
  border-bottom: 1px solid #43853d;
  background: none;
}

#intro a:hover, #intro a:focus,
#column2 ul li a:hover, #column2 ul li a:focus {
  color: #fff;
  background: none;
}

span > .mark, span > .mark:visited {
  color: #707070;
  position: absolute;
  top: 0px;
  right: 0px;
}

span > .mark:hover, span > .mark:focus, span > .mark:active {
  color: #43853d;
  background: none;
}

th > *:last-child, td > *:last-child {
  margin-bottom: 0;
}

.changelog > summary {
  margin: .5rem 0;
  padding: .5rem 0;
  cursor: pointer;
}

/* simpler clearfix */
.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}

.github_icon {
  vertical-align: middle;
  margin: -2px 3px 0 0;
}

@media only screen and (max-width: 1024px) {
  #content {
    overflow: visible;
  }
  #column1.interior {
    margin-left: 0;
    padding-left: .5rem;
    padding-right: .5rem;
    width: auto;
    overflow-y: visible;
  }
  #column2 {
    display: none;
  }
}

@media print {
  html {
    height: auto;
    font-size: 0.75em;
  }
  #column2.interior {
    display: none;
  }
  #column1.interior {
    margin-left: 0px;
    padding: 0px;
    overflow-y: auto;
  }
  .api_metadata,
  #toc,
  .srclink,
  #gtoc,
  .mark {
    display: none;
  }
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.75rem;
  }
  h3 {
    font-size: 1.5rem;
  }
  h4 {
    font-size: 1.3rem;
  }
  h5 {
    font-size: 1.2rem;
  }
  h6 {
    font-size: 1.1rem;
  }
  .api_stability {
    display: inline-block;
  }
  .api_stability a {
    text-decoration: none;
  }
  a {
    color: inherit;
  }
  #apicontent {
    overflow: hidden;
  }
}
"> <link rel="stylesheet" href="data:text/css;base64,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"> <link rel="canonical" href="https://nodejs.org/api/deprecations.html"> </head> <body class="alt apidoc" id="api-section-deprecations"> <div id="content" class="clearfix"> <div id="column2" class="interior"> <div id="intro" class="interior"> <a href="https://nodejs.org/" title="Go back to the home page"> Node.js </a> </div> <ul> <li><a href="https://nodejs.org/api/documentation.html" class="nav-documentation">About these Docs</a></li> <li><a href="https://nodejs.org/api/synopsis.html" class="nav-synopsis">Usage & Example</a></li> </ul> <div class="line"></div> <ul> <li><a href="https://nodejs.org/api/assert.html" class="nav-assert">Assertion Testing</a></li> <li><a href="https://nodejs.org/api/async_hooks.html" class="nav-async_hooks">Async Hooks</a></li> <li><a href="https://nodejs.org/api/buffer.html" class="nav-buffer">Buffer</a></li> <li><a href="https://nodejs.org/api/addons.html" class="nav-addons">C++ Addons</a></li> <li><a href="https://nodejs.org/api/n-api.html" class="nav-n-api">C/C++ Addons - N-API</a></li> <li><a href="https://nodejs.org/api/child_process.html" class="nav-child_process">Child Processes</a></li> <li><a href="https://nodejs.org/api/cluster.html" class="nav-cluster">Cluster</a></li> <li><a href="https://nodejs.org/api/cli.html" class="nav-cli">Command Line Options</a></li> <li><a href="https://nodejs.org/api/console.html" class="nav-console">Console</a></li> <li><a href="https://nodejs.org/api/crypto.html" class="nav-crypto">Crypto</a></li> <li><a href="https://nodejs.org/api/debugger.html" class="nav-debugger">Debugger</a></li> <li><a href="https://nodejs.org/api/deprecations.html" class="nav-deprecations active">Deprecated APIs</a></li> <li><a href="https://nodejs.org/api/dns.html" class="nav-dns">DNS</a></li> <li><a href="https://nodejs.org/api/domain.html" class="nav-domain">Domain</a></li> <li><a href="https://nodejs.org/api/esm.html" class="nav-esm">ECMAScript Modules</a></li> <li><a href="https://nodejs.org/api/errors.html" class="nav-errors">Errors</a></li> <li><a href="https://nodejs.org/api/events.html" class="nav-events">Events</a></li> <li><a href="https://nodejs.org/api/fs.html" class="nav-fs">File System</a></li> <li><a href="https://nodejs.org/api/globals.html" class="nav-globals">Globals</a></li> <li><a href="https://nodejs.org/api/http.html" class="nav-http">HTTP</a></li> <li><a href="https://nodejs.org/api/http2.html" class="nav-http2">HTTP/2</a></li> <li><a href="https://nodejs.org/api/https.html" class="nav-https">HTTPS</a></li> <li><a href="https://nodejs.org/api/inspector.html" class="nav-inspector">Inspector</a></li> <li><a href="https://nodejs.org/api/intl.html" class="nav-intl">Internationalization</a></li> <li><a href="https://nodejs.org/api/modules.html" class="nav-modules">Modules</a></li> <li><a href="https://nodejs.org/api/net.html" class="nav-net">Net</a></li> <li><a href="https://nodejs.org/api/os.html" class="nav-os">OS</a></li> <li><a href="https://nodejs.org/api/path.html" class="nav-path">Path</a></li> <li><a href="https://nodejs.org/api/perf_hooks.html" class="nav-perf_hooks">Performance Hooks</a></li> <li><a href="https://nodejs.org/api/policy.html" class="nav-policy">Policies</a></li> <li><a href="https://nodejs.org/api/process.html" class="nav-process">Process</a></li> <li><a href="https://nodejs.org/api/punycode.html" class="nav-punycode">Punycode</a></li> <li><a href="https://nodejs.org/api/querystring.html" class="nav-querystring">Query Strings</a></li> <li><a href="https://nodejs.org/api/readline.html" class="nav-readline">Readline</a></li> <li><a href="https://nodejs.org/api/repl.html" class="nav-repl">REPL</a></li> <li><a href="https://nodejs.org/api/report.html" class="nav-report">Report</a></li> <li><a href="https://nodejs.org/api/stream.html" class="nav-stream">Stream</a></li> <li><a href="https://nodejs.org/api/string_decoder.html" class="nav-string_decoder">String Decoder</a></li> <li><a href="https://nodejs.org/api/timers.html" class="nav-timers">Timers</a></li> <li><a href="https://nodejs.org/api/tls.html" class="nav-tls">TLS/SSL</a></li> <li><a href="https://nodejs.org/api/tracing.html" class="nav-tracing">Trace Events</a></li> <li><a href="https://nodejs.org/api/tty.html" class="nav-tty">TTY</a></li> <li><a href="https://nodejs.org/api/dgram.html" class="nav-dgram">UDP/Datagram</a></li> <li><a href="https://nodejs.org/api/url.html" class="nav-url">URL</a></li> <li><a href="https://nodejs.org/api/util.html" class="nav-util">Utilities</a></li> <li><a href="https://nodejs.org/api/v8.html" class="nav-v8">V8</a></li> <li><a href="https://nodejs.org/api/vm.html" class="nav-vm">VM</a></li> <li><a href="https://nodejs.org/api/worker_threads.html" class="nav-worker_threads">Worker Threads</a></li> <li><a href="https://nodejs.org/api/zlib.html" class="nav-zlib">Zlib</a></li> </ul> <div class="line"></div> <ul> <li><a href="https://github.com/nodejs/node" class="nav-https-github-com-nodejs-node">GitHub Repo & Issue Tracker</a></li> </ul> </div> <div id="column1" data-id="deprecations" class="interior"> <header> <h1>Node.js v12.10.0 Documentation</h1> <div id="gtoc"> <ul> <li> <a href="https://nodejs.org/api/index.html" name="toc">Index</a> </li> <li> <a href="https://nodejs.org/api/all.html">View on single page</a> </li> <li> <a href="https://nodejs.org/api/deprecations.json">View as JSON</a> </li> <li class="version-picker"> <a href="#">View another version <span>▼</span></a> <ol class="version-picker"><li><a href="https://nodejs.org/docs/latest-v12.x/api/deprecations.html">12.x</a></li> <li><a href="https://nodejs.org/docs/latest-v11.x/api/deprecations.html">11.x</a></li> <li><a href="https://nodejs.org/docs/latest-v10.x/api/deprecations.html">10.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v9.x/api/deprecations.html">9.x</a></li> <li><a href="https://nodejs.org/docs/latest-v8.x/api/deprecations.html">8.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v7.x/api/deprecations.html">7.x</a></li></ol> </li> <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/deprecations.md"><span class="github_icon"><svg height="16" width="16" viewBox="0 0 16.1 16.1" fill="currentColor"><path d="M8 0a8 8 0 0 0-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 0 1 4 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0 0 16 8a8 8 0 0 0-8-8z"></path></svg></span>Edit on GitHub</a></li> </ul> </div> <hr> </header> <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_prototype_headers_outgoingmessage_prototype_headernames">DEP0066: OutgoingMessage.prototype._headers, OutgoingMessage.prototype._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_dep0109_http_https_and_tls_support_for_invalid_urls">DEP0109: http, https, and tls support for invalid URLs</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> <li><a href="#deprecations_dep0112_dgram_private_apis">DEP0112: dgram private APIs</a></li> <li><a href="#deprecations_dep0113_cipher_setauthtag_decipher_getauthtag">DEP0113: Cipher.setAuthTag(), Decipher.getAuthTag()</a></li> <li><a href="#deprecations_dep0114_crypto_tobuf">DEP0114: crypto._toBuf()</a></li> <li><a href="#deprecations_dep0115_crypto_prng_crypto_pseudorandombytes_crypto_rng">DEP0115: crypto.prng(), crypto.pseudoRandomBytes(), crypto.rng()</a></li> <li><a href="#deprecations_dep0116_legacy_url_api">DEP0116: Legacy URL API</a></li> <li><a href="#deprecations_dep0117_native_crypto_handles">DEP0117: Native crypto handles</a></li> <li><a href="#deprecations_dep0118_dns_lookup_support_for_a_falsy_hostname">DEP0118: dns.lookup() support for a falsy hostname</a></li> <li><a href="#deprecations_dep0119_process_binding_uv_errname_private_api">DEP0119: process.binding('uv').errname() private API</a></li> <li><a href="#deprecations_dep0120_windows_performance_counter_support">DEP0120: Windows Performance Counter Support</a></li> <li><a href="#deprecations_dep0121_net_setsimultaneousaccepts">DEP0121: net._setSimultaneousAccepts()</a></li> <li><a href="#deprecations_dep0122_tls_server_prototype_setoptions">DEP0122: tls Server.prototype.setOptions()</a></li> <li><a href="#deprecations_dep0123_setting_the_tls_servername_to_an_ip_address">DEP0123: setting the TLS ServerName to an IP address</a></li> <li><a href="#deprecations_dep0124_using_replserver_rli">DEP0124: using REPLServer.rli</a></li> <li><a href="#deprecations_dep0125_require_stream_wrap">DEP0125: require('_stream_wrap')</a></li> <li><a href="#deprecations_dep0126_timers_active">DEP0126: timers.active()</a></li> <li><a href="#deprecations_dep0127_timers_unrefactive">DEP0127: timers._unrefActive()</a></li> <li><a href="#deprecations_dep0128_modules_with_an_invalid_main_entry_and_an_index_js_file">DEP0128: modules with an invalid <code>main</code> entry and an <code>index.js</code> file</a></li> <li><a href="#deprecations_dep0129_childprocess_channel">DEP0129: ChildProcess._channel</a></li> <li><a href="#deprecations_dep0130_module_createrequirefrompath">DEP0130: Module.createRequireFromPath()</a></li> <li><a href="#deprecations_dep0131_legacy_http_parser">DEP0131: Legacy HTTP parser</a></li> <li><a href="#deprecations_dep0132_worker_terminate_with_callback">DEP0132: worker.terminate() with callback</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 for any of the following reasons:</p> <ul> <li>Use of the API is unsafe.</li> <li>An improved alternative API is available.</li> <li>Breaking changes to the API are expected in a future major release.</li> </ul> <p>Node.js 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="https://nodejs.org/api/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 <a href="https://nodejs.org/api/cli.html#cli_throw_deprecation"><code>--throw-deprecation</code></a> 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="https://nodejs.org/api/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 lead to accidental security issues.</p> <p>As an alternative, use one of the following methods of constructing <code>Buffer</code> objects:</p> <ul> <li><a href="https://nodejs.org/api/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="https://nodejs.org/api/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="https://nodejs.org/api/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="https://nodejs.org/api/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="https://nodejs.org/api/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="https://nodejs.org/api/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="https://nodejs.org/api/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>v12.0.0</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>v0.11.14</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: End-of-Life</p> <p>Within the <a href="https://nodejs.org/api/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="https://nodejs.org/api/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>v11.0.0</td> <td><p>Runtime deprecation (for <code>digest === null</code>).</p></td></tr> <tr><td>v8.0.0</td> <td><p>End-of-Life (for <code>digest === undefined</code>).</p></td></tr> <tr><td>v6.12.0</td> <td><p>A deprecation code has been assigned.</p></td></tr> <tr><td>v6.0.0</td> <td><p>Runtime deprecation (for <code>digest === undefined</code>).</p></td></tr> </tbody></table> </details> </div> <p>Type: Runtime</p> <p>Use of the <a href="https://nodejs.org/api/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 <code>digest</code> set to <code>undefined</code> will throw a <code>TypeError</code>.</p> <p>Beginning in Node.js v11.0.0, calling these functions with <code>digest</code> set to <code>null</code> will print a deprecation warning to align with the behavior when <code>digest</code> is <code>undefined</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>v11.0.0</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>v0.11.13</td> <td><p>Runtime deprecation.</p></td></tr> </tbody></table> </details> </div> <p>Type: End-of-Life</p> <p>The <code>crypto.createCredentials()</code> API was removed. Please use <a href="https://nodejs.org/api/tls.html#tls_tls_createsecurecontext_options"><code>tls.createSecureContext()</code></a> in