learnyounode

<!DOCTYPE html><html lang="en"><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>Command Line Options | 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/cli.html"> </head> <body class="alt apidoc" id="api-section-cli"> <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 active">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">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="cli" 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/cli.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/cli.html">12.x</a></li> <li><a href="https://nodejs.org/docs/latest-v11.x/api/cli.html">11.x</a></li> <li><a href="https://nodejs.org/docs/latest-v10.x/api/cli.html">10.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v9.x/api/cli.html">9.x</a></li> <li><a href="https://nodejs.org/docs/latest-v8.x/api/cli.html">8.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v7.x/api/cli.html">7.x</a></li> <li><a href="https://nodejs.org/docs/latest-v6.x/api/cli.html">6.x</a></li> <li><a href="https://nodejs.org/docs/latest-v5.x/api/cli.html">5.x</a></li></ol> </li> <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/cli.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="#cli_command_line_options">Command Line Options</a></p> <ul> <li><a href="#cli_synopsis">Synopsis</a></li> <li> <p><a href="#cli_options">Options</a></p> <ul> <li><a href="#cli"><code>-</code></a></li> <li><a href="#cli_1"><code>--</code></a></li> <li><a href="#cli_abort_on_uncaught_exception"><code>--abort-on-uncaught-exception</code></a></li> <li><a href="#cli_completion_bash"><code>--completion-bash</code></a></li> <li><span class="stability_1"><a href="#cli_cpu_prof"><code>--cpu-prof</code></a></span></li> <li><span class="stability_1"><a href="#cli_cpu_prof_dir"><code>--cpu-prof-dir</code></a></span></li> <li><span class="stability_1"><a href="#cli_cpu_prof_interval"><code>--cpu-prof-interval</code></a></span></li> <li><span class="stability_1"><a href="#cli_cpu_prof_name"><code>--cpu-prof-name</code></a></span></li> <li><a href="#cli_enable_fips"><code>--enable-fips</code></a></li> <li><a href="#cli_es_module_specifier_resolution_mode"><code>--es-module-specifier-resolution=mode</code></a></li> <li><a href="#cli_experimental_exports"><code>--experimental-exports</code></a></li> <li><a href="#cli_experimental_modules"><code>--experimental-modules</code></a></li> <li><a href="#cli_experimental_policy"><code>--experimental-policy</code></a></li> <li><a href="#cli_experimental_repl_await"><code>--experimental-repl-await</code></a></li> <li><a href="#cli_experimental_report"><code>--experimental-report</code></a></li> <li><a href="#cli_experimental_vm_modules"><code>--experimental-vm-modules</code></a></li> <li><a href="#cli_experimental_wasm_modules"><code>--experimental-wasm-modules</code></a></li> <li><a href="#cli_force_fips"><code>--force-fips</code></a></li> <li><span class="stability_1"><a href="#cli_frozen_intrinsics"><code>--frozen-intrinsics</code></a></span></li> <li><a href="#cli_heapsnapshot_signal_signal"><code>--heapsnapshot-signal=signal</code></a></li> <li><span class="stability_1"><a href="#cli_heap_prof"><code>--heap-prof</code></a></span></li> <li><span class="stability_1"><a href="#cli_heap_prof_dir"><code>--heap-prof-dir</code></a></span></li> <li><span class="stability_1"><a href="#cli_heap_prof_interval"><code>--heap-prof-interval</code></a></span></li> <li><span class="stability_1"><a href="#cli_heap_prof_name"><code>--heap-prof-name</code></a></span></li> <li><a href="#cli_http_parser_library"><code>--http-parser=library</code></a></li> <li><a href="#cli_http_server_default_timeout_milliseconds"><code>--http-server-default-timeout=milliseconds</code></a></li> <li><a href="#cli_icu_data_dir_file"><code>--icu-data-dir=file</code></a></li> <li><a href="#cli_input_type_type"><code>--input-type=type</code></a></li> <li><a href="#cli_inspect_brk_host_port"><code>--inspect-brk[=[host:]port]</code></a></li> <li><a href="#cli_inspect_port_host_port"><code>--inspect-port=[host:]port</code></a></li> <li> <p><a href="#cli_inspect_host_port"><code>--inspect[=[host:]port]</code></a></p> <ul> <li><a href="#cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure">Warning: binding inspector to a public IP:port combination is insecure</a></li> </ul> </li> <li><a href="#cli_inspect_publish_uid_stderr_http"><code>--inspect-publish-uid=stderr,http</code></a></li> <li><a href="#cli_loader_file"><code>--loader=file</code></a></li> <li><a href="#cli_max_http_header_size_size"><code>--max-http-header-size=size</code></a></li> <li><a href="#cli_napi_modules"><code>--napi-modules</code></a></li> <li><a href="#cli_no_deprecation"><code>--no-deprecation</code></a></li> <li><a href="#cli_no_force_async_hooks_checks"><code>--no-force-async-hooks-checks</code></a></li> <li><a href="#cli_no_warnings"><code>--no-warnings</code></a></li> <li><a href="#cli_openssl_config_file"><code>--openssl-config=file</code></a></li> <li><a href="#cli_pending_deprecation"><code>--pending-deprecation</code></a></li> <li><span class="stability_1"><a href="#cli_policy_integrity_sri"><code>--policy-integrity=sri</code></a></span></li> <li><a href="#cli_preserve_symlinks"><code>--preserve-symlinks</code></a></li> <li><a href="#cli_preserve_symlinks_main"><code>--preserve-symlinks-main</code></a></li> <li><a href="#cli_prof"><code>--prof</code></a></li> <li><a href="#cli_prof_process"><code>--prof-process</code></a></li> <li><a href="#cli_redirect_warnings_file"><code>--redirect-warnings=file</code></a></li> <li><a href="#cli_report_directory_directory"><code>--report-directory=directory</code></a></li> <li><a href="#cli_report_filename_filename"><code>--report-filename=filename</code></a></li> <li><a href="#cli_report_on_fatalerror"><code>--report-on-fatalerror</code></a></li> <li><a href="#cli_report_on_signal"><code>--report-on-signal</code></a></li> <li><a href="#cli_report_signal_signal"><code>--report-signal=signal</code></a></li> <li><a href="#cli_report_uncaught_exception"><code>--report-uncaught-exception</code></a></li> <li><a href="#cli_throw_deprecation"><code>--throw-deprecation</code></a></li> <li><a href="#cli_title_title"><code>--title=title</code></a></li> <li><a href="#cli_tls_cipher_list_list"><code>--tls-cipher-list=list</code></a></li> <li><a href="#cli_tls_max_v1_2"><code>--tls-max-v1.2</code></a></li> <li><a href="#cli_tls_max_v1_3"><code>--tls-max-v1.3</code></a></li> <li><a href="#cli_tls_min_v1_0"><code>--tls-min-v1.0</code></a></li> <li><a href="#cli_tls_min_v1_1"><code>--tls-min-v1.1</code></a></li> <li><a href="#cli_tls_min_v1_2"><code>--tls-min-v1.2</code></a></li> <li><a href="#cli_tls_min_v1_3"><code>--tls-min-v1.3</code></a></li> <li><a href="#cli_trace_deprecation"><code>--trace-deprecation</code></a></li> <li><a href="#cli_trace_event_categories"><code>--trace-event-categories</code></a></li> <li><a href="#cli_trace_event_file_pattern"><code>--trace-event-file-pattern</code></a></li> <li><a href="#cli_trace_events_enabled"><code>--trace-events-enabled</code></a></li> <li><a href="#cli_trace_sync_io"><code>--trace-sync-io</code></a></li> <li><a href="#cli_trace_tls"><code>--trace-tls</code></a></li> <li><a href="#cli_trace_warnings"><code>--trace-warnings</code></a></li> <li><a href="#cli_track_heap_objects"><code>--track-heap-objects</code></a></li> <li><a href="#cli_unhandled_rejections_mode"><code>--unhandled-rejections=mode</code></a></li> <li><a href="#cli_use_bundled_ca_use_openssl_ca"><code>--use-bundled-ca</code>, <code>--use-openssl-ca</code></a></li> <li><a href="#cli_v8_options"><code>--v8-options</code></a></li> <li><a href="#cli_v8_pool_size_num"><code>--v8-pool-size=num</code></a></li> <li><a href="#cli_zero_fill_buffers"><code>--zero-fill-buffers</code></a></li> <li><a href="#cli_c_check"><code>-c</code>, <code>--check</code></a></li> <li><a href="#cli_e_eval_script"><code>-e</code>, <code>--eval "script"</code></a></li> <li><a href="#cli_h_help"><code>-h</code>, <code>--help</code></a></li> <li><a href="#cli_i_interactive"><code>-i</code>, <code>--interactive</code></a></li> <li><a href="#cli_p_print_script"><code>-p</code>, <code>--print "script"</code></a></li> <li><a href="#cli_r_require_module"><code>-r</code>, <code>--require module</code></a></li> <li><a href="#cli_v_version"><code>-v</code>, <code>--version</code></a></li> </ul> </li> <li> <p><a href="#cli_environment_variables">Environment Variables</a></p> <ul> <li><a href="#cli_node_debug_module"><code>NODE_DEBUG=module[,…]</code></a></li> <li><a href="#cli_node_debug_native_module"><code>NODE_DEBUG_NATIVE=module[,…]</code></a></li> <li><a href="#cli_node_disable_colors_1"><code>NODE_DISABLE_COLORS=1</code></a></li> <li><a href="#cli_node_extra_ca_certs_file"><code>NODE_EXTRA_CA_CERTS=file</code></a></li> <li><a href="#cli_node_icu_data_file"><code>NODE_ICU_DATA=file</code></a></li> <li><a href="#cli_node_no_warnings_1"><code>NODE_NO_WARNINGS=1</code></a></li> <li><a href="#cli_node_options_options"><code>NODE_OPTIONS=options...</code></a></li> <li><a href="#cli_node_path_path"><code>NODE_PATH=path[:…]</code></a></li> <li><a href="#cli_node_pending_deprecation_1"><code>NODE_PENDING_DEPRECATION=1</code></a></li> <li><a href="#cli_node_pending_pipe_instances_instances"><code>NODE_PENDING_PIPE_INSTANCES=instances</code></a></li> <li><a href="#cli_node_preserve_symlinks_1"><code>NODE_PRESERVE_SYMLINKS=1</code></a></li> <li><a href="#cli_node_redirect_warnings_file"><code>NODE_REDIRECT_WARNINGS=file</code></a></li> <li><a href="#cli_node_repl_history_file"><code>NODE_REPL_HISTORY=file</code></a></li> <li><a href="#cli_node_tls_reject_unauthorized_value"><code>NODE_TLS_REJECT_UNAUTHORIZED=value</code></a></li> <li><a href="#cli_node_v8_coverage_dir"><code>NODE_V8_COVERAGE=dir</code></a></li> <li><a href="#cli_openssl_conf_file"><code>OPENSSL_CONF=file</code></a></li> <li><a href="#cli_ssl_cert_dir_dir"><code>SSL_CERT_DIR=dir</code></a></li> <li><a href="#cli_ssl_cert_file_file"><code>SSL_CERT_FILE=file</code></a></li> <li><a href="#cli_uv_threadpool_size_size"><code>UV_THREADPOOL_SIZE=size</code></a></li> </ul> </li> </ul> </li> </ul> </div> <div id="apicontent"> <h1>Command Line Options<span><a class="mark" href="#cli_command_line_options" id="cli_command_line_options">#</a></span></h1> <p>Node.js comes with a variety of CLI options. These options expose built-in debugging, multiple ways to execute scripts, and other helpful runtime options.</p> <p>To view this documentation as a manual page in a terminal, run <code>man node</code>.</p> <h2>Synopsis<span><a class="mark" href="#cli_synopsis" id="cli_synopsis">#</a></span></h2> <p><code>node [options] [V8 options] [script.js | -e "script" | -] [--] [arguments]</code></p> <p><code>node inspect [script.js | -e "script" | <host>:<port>] …</code></p> <p><code>node --v8-options</code></p> <p>Execute without arguments to start the <a href="https://nodejs.org/api/repl.html">REPL</a>.</p> <p><em>For more info about <code>node inspect</code>, please see the <a href="https://nodejs.org/api/debugger.html">debugger</a> documentation.</em></p> <h2>Options<span><a class="mark" href="#cli_options" id="cli_options">#</a></span></h2> <div class="api_metadata"> <details class="changelog"><summary>History</summary> <table> <tbody><tr><th>Version</th><th>Changes</th></tr> <tr><td>v10.12.0</td> <td><p>Underscores instead of dashes are now allowed for Node.js options as well, in addition to V8 options.</p></td></tr> </tbody></table> </details> </div> <p>All options, including V8 options, allow words to be separated by both dashes (<code>-</code>) or underscores (<code>_</code>).</p> <p>For example, <code>--pending-deprecation</code> is equivalent to <code>--pending_deprecation</code>.</p> <h3><code>-</code><span><a class="mark" href="#cli" id="cli">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <p>Alias for stdin, analogous to the use of - in other command line utilities, meaning that the script will be read from stdin, and the rest of the options are passed to that script.</p> <h3><code>--</code><span><a class="mark" href="#cli_1" id="cli_1">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.11.0</span> </div> <p>Indicate the end of node options. Pass the rest of the arguments to the script. If no script filename or eval/print script is supplied prior to this, then the next argument will be used as a script filename.</p> <h3><code>--abort-on-uncaught-exception</code><span><a class="mark" href="#cli_abort_on_uncaught_exception" id="cli_abort_on_uncaught_exception">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.10</span> </div> <p>Aborting instead of exiting causes a core file to be generated for post-mortem analysis using a debugger (such as <code>lldb</code>, <code>gdb</code>, and <code>mdb</code>).</p> <p>If this flag is passed, the behavior can still be set to not abort through <a href="https://nodejs.org/api/process.html#process_process_setuncaughtexceptioncapturecallback_fn"><code>process.setUncaughtExceptionCaptureCallback()</code></a> (and through usage of the <code>domain</code> module that uses it).</p> <h3><code>--completion-bash</code><span><a class="mark" href="#cli_completion_bash" id="cli_completion_bash">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.12.0</span> </div> <p>Print source-able bash completion script for Node.js.</p> <pre><code class="language-console">$ node --completion-bash > node_bash_completion $ source node_bash_completion </code></pre> <h3><code>--cpu-prof</code><span><a class="mark" href="#cli_cpu_prof" id="cli_cpu_prof">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Starts the V8 CPU profiler on start up, and writes the CPU profile to disk before exit.</p> <p>If <code>--cpu-prof-dir</code> is not specified, the generated profile will be placed in the current working directory.</p> <p>If <code>--cpu-prof-name</code> is not specified, the generated profile will be named <code>CPU.${yyyymmdd}.${hhmmss}.${pid}.${tid}.${seq}.cpuprofile</code>.</p> <pre><code class="language-console">$ node --cpu-prof index.js $ ls *.cpuprofile CPU.20190409.202950.15293.0.0.cpuprofile </code></pre> <h3><code>--cpu-prof-dir</code><span><a class="mark" href="#cli_cpu_prof_dir" id="cli_cpu_prof_dir">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the directory where the CPU profiles generated by <code>--cpu-prof</code> will be placed.</p> <h3><code>--cpu-prof-interval</code><span><a class="mark" href="#cli_cpu_prof_interval" id="cli_cpu_prof_interval">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.2.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the sampling interval in microseconds for the CPU profiles generated by <code>--cpu-prof</code>. The default is 1000 microseconds.</p> <h3><code>--cpu-prof-name</code><span><a class="mark" href="#cli_cpu_prof_name" id="cli_cpu_prof_name">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the file name of the CPU profile generated by <code>--cpu-prof</code>.</p> <h3><code>--enable-fips</code><span><a class="mark" href="#cli_enable_fips" id="cli_enable_fips">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div> <p>Enable FIPS-compliant crypto at startup. (Requires Node.js to be built with <code>./configure --openssl-fips</code>.)</p> <h3><code>--es-module-specifier-resolution=mode</code><span><a class="mark" href="#cli_es_module_specifier_resolution_mode" id="cli_es_module_specifier_resolution_mode">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p>To be used in conjunction with <code>--experimental-modules</code>. Sets the resolution algorithm for resolving specifiers. Valid options are <code>explicit</code> and <code>node</code>.</p> <p>The default is <code>explicit</code>, which requires providing the full path to a module. The <code>node</code> mode will enable support for optional file extensions and the ability to import a directory that has an index file.</p> <p>Please see <a href="https://nodejs.org/api/esm.html#esm_customizing_esm_specifier_resolution_algorithm">customizing esm specifier resolution</a> for example usage.</p> <h3><code>--experimental-exports</code><span><a class="mark" href="#cli_experimental_exports" id="cli_experimental_exports">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.7.0</span> </div> <p>Enable experimental resolution using the <code>exports</code> field in <code>package.json</code>.</p> <h3><code>--experimental-modules</code><span><a class="mark" href="#cli_experimental_modules" id="cli_experimental_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.5.0</span> </div> <p>Enable experimental ES module support and caching modules.</p> <h3><code>--experimental-policy</code><span><a class="mark" href="#cli_experimental_policy" id="cli_experimental_policy">#</a></span></h3> <div class="api_metadata"> <span>Added in: v11.8.0</span> </div> <p>Use the specified file as a security policy.</p> <h3><code>--experimental-repl-await</code><span><a class="mark" href="#cli_experimental_repl_await" id="cli_experimental_repl_await">#</a></span></h3> <div class="api_metadata"> <span>Added in: v10.0.0</span> </div> <p>Enable experimental top-level <code>await</code> keyword support in REPL.</p> <h3><code>--experimental-report</code><span><a class="mark" href="#cli_experimental_report" id="cli_experimental_report">#</a></span></h3> <div class="api_metadata"> <span>Added in: v11.8.0</span> </div> <p>Enable experimental diagnostic report feature.</p> <h3><code>--experimental-vm-modules</code><span><a class="mark" href="#cli_experimental_vm_modules" id="cli_experimental_vm_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.6.0</span> </div> <p>Enable experimental ES Module support in the <code>vm</code> module.</p> <h3><code>--experimental-wasm-modules</code><span><a class="mark" href="#cli_experimental_wasm_modules" id="cli_experimental_wasm_modules">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.3.0</span> </div> <p>Enable experimental WebAssembly module support.</p> <h3><code>--force-fips</code><span><a class="mark" href="#cli_force_fips" id="cli_force_fips">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.0.0</span> </div> <p>Force FIPS-compliant crypto on startup. (Cannot be disabled from script code.) (Same requirements as <code>--enable-fips</code>.)</p> <h3><code>--frozen-intrinsics</code><span><a class="mark" href="#cli_frozen_intrinsics" id="cli_frozen_intrinsics">#</a></span></h3> <div class="api_metadata"> <span>Added in: v11.12.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Enable experimental frozen intrinsics like <code>Array</code> and <code>Object</code>.</p> <p>Support is currently only provided for the root context and no guarantees are currently provided that <code>global.Array</code> is indeed the default intrinsic reference. Code may break under this flag.</p> <p><code>--require</code> runs prior to freezing intrinsics in order to allow polyfills to be added.</p> <h3><code>--heapsnapshot-signal=signal</code><span><a class="mark" href="#cli_heapsnapshot_signal_signal" id="cli_heapsnapshot_signal_signal">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p>Enables a signal handler that causes the Node.js process to write a heap dump when the specified signal is received.</p> <pre><code class="language-console">$ node --heapsnapshot-signal=SIGUSR2 index.js & $ ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND node 1 5.5 6.1 787252 247004 ? Ssl 16:43 0:02 node --heapsnapshot-signal=SIGUSR2 index.js $ kill -USR2 1 $ ls Heap.20190718.133405.15554.0.001.heapsnapshot </code></pre> <h3><code>--heap-prof</code><span><a class="mark" href="#cli_heap_prof" id="cli_heap_prof">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.4.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Starts the V8 heap profiler on start up, and writes the heap profile to disk before exit.</p> <p>If <code>--heap-prof-dir</code> is not specified, the generated profile will be placed in the current working directory.</p> <p>If <code>--heap-prof-name</code> is not specified, the generated profile will be named <code>Heap.${yyyymmdd}.${hhmmss}.${pid}.${tid}.${seq}.heapprofile</code>.</p> <pre><code class="language-console">$ node --heap-prof index.js $ ls *.heapprofile Heap.20190409.202950.15293.0.001.heapprofile </code></pre> <h3><code>--heap-prof-dir</code><span><a class="mark" href="#cli_heap_prof_dir" id="cli_heap_prof_dir">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.4.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the directory where the heap profiles generated by <code>--heap-prof</code> will be placed.</p> <h3><code>--heap-prof-interval</code><span><a class="mark" href="#cli_heap_prof_interval" id="cli_heap_prof_interval">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.4.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the average sampling interval in bytes for the heap profiles generated by <code>--heap-prof</code>. The default is 512 * 1024 bytes.</p> <h3><code>--heap-prof-name</code><span><a class="mark" href="#cli_heap_prof_name" id="cli_heap_prof_name">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.4.0</span> </div> <p></p><div class="api_stability api_stability_1"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 1</a> - Experimental</div><p></p> <p>Specify the file name of the heap profile generated by <code>--heap-prof</code>.</p> <p>Generates a heap snapshot each time the process receives the specified signal. <code>signal</code> must be a valid signal name. Disabled by default.</p> <h3><code>--http-parser=library</code><span><a class="mark" href="#cli_http_parser_library" id="cli_http_parser_library">#</a></span></h3> <div class="api_metadata"> <span>Added in: v11.4.0</span> </div> <p>Chooses an HTTP parser library. Available values are:</p> <ul> <li><code>llhttp</code> for <a href="https://llhttp.org/">https://llhttp.org/</a></li> <li><code>legacy</code> for <a href="https://github.com/nodejs/http-parser">https://github.com/nodejs/http-parser</a></li> </ul> <p>The default is <code>llhttp</code>, unless otherwise specified when building Node.js.</p> <p>This flag exists to aid in experimentation with the internal implementation of the Node.js http parser. This flag is likely to become a no-op and removed at some point in the future.</p> <h3><code>--http-server-default-timeout=milliseconds</code><span><a class="mark" href="#cli_http_server_default_timeout_milliseconds" id="cli_http_server_default_timeout_milliseconds">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.4.0</span> </div> <p>Overrides the default value of <code>http</code>, <code>https</code> and <code>http2</code> server socket timeout. Setting the value to 0 disables server socket timeout. Unless provided, http server sockets timeout after 120s (2 minutes). Programmatic setting of the timeout takes precedence over the value set through this flag.</p> <h3><code>--icu-data-dir=file</code><span><a class="mark" href="#cli_icu_data_dir_file" id="cli_icu_data_dir_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v0.11.15</span> </div> <p>Specify ICU data load path. (Overrides <code>NODE_ICU_DATA</code>.)</p> <h3><code>--input-type=type</code><span><a class="mark" href="#cli_input_type_type" id="cli_input_type_type">#</a></span></h3> <div class="api_metadata"> <span>Added in: v12.0.0</span> </div> <p>Used with <code>--experimental-modules</code>, this configures Node.js to interpret string input as CommonJS or as an ES module. String input is input via <code>--eval</code>, <code>--print</code>, or <code>STDIN</code>.</p> <p>Valid values are <code>"commonjs"</code> and <code>"module"</code>. The default is <code>"commonjs"</code>.</p> <h3><code>--inspect-brk[=[host:]port]</code><span><a class="mark" href="#cli_inspect_brk_host_port" id="cli_inspect_brk_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.6.0</span> </div> <p>Activate inspector on <code>host:port</code> and break at start of user script. Default <code>host:port</code> is <code>127.0.0.1:9229</code>.</p> <h3><code>--inspect-port=[host:]port</code><span><a class="mark" href="#cli_inspect_port_host_port" id="cli_inspect_port_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v7.6.0</span> </div> <p>Set the <code>host:port</code> to be used when the inspector is activated. Useful when activating the inspector by sending the <code>SIGUSR1</code> signal.</p> <p>Default host is <code>127.0.0.1</code>.</p> <p>See the <a href="#inspector_security">security warning</a> below regarding the <code>host</code> parameter usage.</p> <h3><code>--inspect[=[host:]port]</code><span><a class="mark" href="#cli_inspect_host_port" id="cli_inspect_host_port">#</a></span></h3> <div class="api_metadata"> <span>Added in: v6.3.0</span> </div> <p>Activate inspector on <code>host:port</code>. Default is <code>127.0.0.1:9229</code>.</p> <p>V8 inspector integration allows tools such as Chrome DevTools and IDEs to debug and profile Node.js instances. The tools attach to Node.js instances via a tcp port and communicate using the <a href="https://chromedevtools.github.io/devtools-protocol/">Chrome DevTools Protocol</a>.</p> <p><a id="inspector_security"></a></p> <h4>Warning: binding inspector to a public IP:port combination is insecure<span><a class="mark" href="#cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure" id="cli_warning_binding_inspector_to_a_public_ip_port_combination_is_insecure">#</a></span></h4> <p>Binding the inspector to a public IP (including <code>0.0.0.0</code>) with an open port is insecure, as it allows external hosts to connect to the inspector and perform a <a href="https://www.owasp.org/index.php/Code_Injection">remote code execution</a> attack.</p> <p>If specifying a host, make sure that either:</p> <ul> <li>The host is not accessible from public networks.</li> <li>A firewall disallows unwanted connections on the port.</li> </ul> <p><strong>More specifically, <code>--inspect=0.0.0.0</code> is insecure if the port (<code>9229</code> by default) is not firewall-protected.</strong></p> <p>See the <a href="https://nodejs.org/en/docs/guides/debugging-getting-started/#security-implications">debugging security implications</a> section for more information.</p> <h3><code>--inspect-publish-uid=stderr,http</code><span><a class="mark" href="#cli_inspect_publish_uid_stderr_http" id="cli_inspect_publish_uid_stderr_http">#</a></span></h3> <p>Specify ways of the inspector web socket url exposure.</p> <p>By default inspector websocket url is available in stderr and under <code>/json/list</code> endpoint on <code>http://host:port/json/list</code>.</p> <h3><code>--loader=file</code><span><a class="mark" href="#cli_loader_file" id="cli_loader_file">#</a></span></h3> <div class="api_metadata"> <span>Added in: v9.0.0</span> </div> <p>Specify the <code>file</code> of the custom <a href="https://nodejs.org/api/esm.html#esm_resolve_hook">experimental ECMAScr