learnyounode

<!DOCTYPE html><html lang="en"><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>Errors | 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/errors.html"> </head> <body class="alt apidoc" id="api-section-errors"> <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">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 active">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="errors" 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/errors.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/errors.html">12.x</a></li> <li><a href="https://nodejs.org/docs/latest-v11.x/api/errors.html">11.x</a></li> <li><a href="https://nodejs.org/docs/latest-v10.x/api/errors.html">10.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v9.x/api/errors.html">9.x</a></li> <li><a href="https://nodejs.org/docs/latest-v8.x/api/errors.html">8.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v7.x/api/errors.html">7.x</a></li> <li><a href="https://nodejs.org/docs/latest-v6.x/api/errors.html">6.x</a></li> <li><a href="https://nodejs.org/docs/latest-v5.x/api/errors.html">5.x</a></li> <li><a href="https://nodejs.org/docs/latest-v4.x/api/errors.html">4.x</a></li></ol> </li> <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/errors.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="#errors_errors">Errors</a></p> <ul> <li> <p><a href="#errors_error_propagation_and_interception">Error Propagation and Interception</a></p> <ul> <li><a href="#errors_error_first_callbacks">Error-first callbacks</a></li> </ul> </li> <li> <p><a href="#errors_class_error">Class: Error</a></p> <ul> <li><a href="#errors_new_error_message">new Error(message)</a></li> <li><a href="#errors_error_capturestacktrace_targetobject_constructoropt">Error.captureStackTrace(targetObject[, constructorOpt])</a></li> <li><a href="#errors_error_stacktracelimit">Error.stackTraceLimit</a></li> <li><a href="#errors_error_code">error.code</a></li> <li><a href="#errors_error_message">error.message</a></li> <li><a href="#errors_error_stack">error.stack</a></li> </ul> </li> <li><a href="#errors_class_assertionerror">Class: AssertionError</a></li> <li><a href="#errors_class_rangeerror">Class: RangeError</a></li> <li><a href="#errors_class_referenceerror">Class: ReferenceError</a></li> <li><a href="#errors_class_syntaxerror">Class: SyntaxError</a></li> <li> <p><a href="#errors_class_systemerror">Class: SystemError</a></p> <ul> <li><a href="#errors_error_address">error.address</a></li> <li><a href="#errors_error_code_1">error.code</a></li> <li><a href="#errors_error_dest">error.dest</a></li> <li><a href="#errors_error_errno">error.errno</a></li> <li><a href="#errors_error_info">error.info</a></li> <li><a href="#errors_error_message_1">error.message</a></li> <li><a href="#errors_error_path">error.path</a></li> <li><a href="#errors_error_port">error.port</a></li> <li><a href="#errors_error_syscall">error.syscall</a></li> <li><a href="#errors_common_system_errors">Common System Errors</a></li> </ul> </li> <li><a href="#errors_class_typeerror">Class: TypeError</a></li> <li><a href="#errors_exceptions_vs_errors">Exceptions vs. Errors</a></li> <li> <p><a href="#errors_openssl_errors">OpenSSL Errors</a></p> <ul> <li><a href="#errors_error_opensslerrorstack">error.opensslErrorStack</a></li> <li><a href="#errors_error_function">error.function</a></li> <li><a href="#errors_error_library">error.library</a></li> <li><a href="#errors_error_reason">error.reason</a></li> </ul> </li> <li> <p><a href="#errors_node_js_error_codes">Node.js Error Codes</a></p> <ul> <li><a href="#errors_err_ambiguous_argument">ERR_AMBIGUOUS_ARGUMENT</a></li> <li><a href="#errors_err_arg_not_iterable">ERR_ARG_NOT_ITERABLE</a></li> <li><a href="#errors_err_assertion">ERR_ASSERTION</a></li> <li><a href="#errors_err_async_callback">ERR_ASYNC_CALLBACK</a></li> <li><a href="#errors_err_async_type">ERR_ASYNC_TYPE</a></li> <li><a href="#errors_err_brotli_compression_failed">ERR_BROTLI_COMPRESSION_FAILED</a></li> <li><a href="#errors_err_brotli_invalid_param">ERR_BROTLI_INVALID_PARAM</a></li> <li><a href="#errors_err_buffer_context_not_available">ERR_BUFFER_CONTEXT_NOT_AVAILABLE</a></li> <li><a href="#errors_err_buffer_out_of_bounds">ERR_BUFFER_OUT_OF_BOUNDS</a></li> <li><a href="#errors_err_buffer_too_large">ERR_BUFFER_TOO_LARGE</a></li> <li><a href="#errors_err_cannot_watch_sigint">ERR_CANNOT_WATCH_SIGINT</a></li> <li><a href="#errors_err_child_closed_before_reply">ERR_CHILD_CLOSED_BEFORE_REPLY</a></li> <li><a href="#errors_err_child_process_ipc_required">ERR_CHILD_PROCESS_IPC_REQUIRED</a></li> <li><a href="#errors_err_child_process_stdio_maxbuffer">ERR_CHILD_PROCESS_STDIO_MAXBUFFER</a></li> <li><a href="#errors_err_console_writable_stream">ERR_CONSOLE_WRITABLE_STREAM</a></li> <li><a href="#errors_err_construct_call_required">ERR_CONSTRUCT_CALL_REQUIRED</a></li> <li><a href="#errors_err_construct_call_invalid">ERR_CONSTRUCT_CALL_INVALID</a></li> <li><a href="#errors_err_cpu_usage">ERR_CPU_USAGE</a></li> <li><a href="#errors_err_crypto_custom_engine_not_supported">ERR_CRYPTO_CUSTOM_ENGINE_NOT_SUPPORTED</a></li> <li><a href="#errors_err_crypto_ecdh_invalid_format">ERR_CRYPTO_ECDH_INVALID_FORMAT</a></li> <li><a href="#errors_err_crypto_ecdh_invalid_public_key">ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY</a></li> <li><a href="#errors_err_crypto_engine_unknown">ERR_CRYPTO_ENGINE_UNKNOWN</a></li> <li><a href="#errors_err_crypto_fips_forced">ERR_CRYPTO_FIPS_FORCED</a></li> <li><a href="#errors_err_crypto_fips_unavailable">ERR_CRYPTO_FIPS_UNAVAILABLE</a></li> <li><a href="#errors_err_crypto_hash_digest_no_utf16">ERR_CRYPTO_HASH_DIGEST_NO_UTF16</a></li> <li><a href="#errors_err_crypto_hash_finalized">ERR_CRYPTO_HASH_FINALIZED</a></li> <li><a href="#errors_err_crypto_hash_update_failed">ERR_CRYPTO_HASH_UPDATE_FAILED</a></li> <li><a href="#errors_err_crypto_incompatible_key_options">ERR_CRYPTO_INCOMPATIBLE_KEY_OPTIONS</a></li> <li><a href="#errors_err_crypto_invalid_digest">ERR_CRYPTO_INVALID_DIGEST</a></li> <li><a href="#errors_err_crypto_invalid_key_object_type">ERR_CRYPTO_INVALID_KEY_OBJECT_TYPE</a></li> <li><a href="#errors_err_crypto_invalid_state">ERR_CRYPTO_INVALID_STATE</a></li> <li><a href="#errors_err_crypto_pbkdf2_error">ERR_CRYPTO_PBKDF2_ERROR</a></li> <li><a href="#errors_err_crypto_scrypt_invalid_parameter">ERR_CRYPTO_SCRYPT_INVALID_PARAMETER</a></li> <li><a href="#errors_err_crypto_scrypt_not_supported">ERR_CRYPTO_SCRYPT_NOT_SUPPORTED</a></li> <li><a href="#errors_err_crypto_sign_key_required">ERR_CRYPTO_SIGN_KEY_REQUIRED</a></li> <li><a href="#errors_err_crypto_timing_safe_equal_length">ERR_CRYPTO_TIMING_SAFE_EQUAL_LENGTH</a></li> <li><a href="#errors_err_dns_set_servers_failed">ERR_DNS_SET_SERVERS_FAILED</a></li> <li><a href="#errors_err_domain_callback_not_available">ERR_DOMAIN_CALLBACK_NOT_AVAILABLE</a></li> <li><a href="#errors_err_domain_cannot_set_uncaught_exception_capture">ERR_DOMAIN_CANNOT_SET_UNCAUGHT_EXCEPTION_CAPTURE</a></li> <li><a href="#errors_err_encoding_invalid_encoded_data">ERR_ENCODING_INVALID_ENCODED_DATA</a></li> <li><a href="#errors_err_encoding_not_supported">ERR_ENCODING_NOT_SUPPORTED</a></li> <li><a href="#errors_err_falsy_value_rejection">ERR_FALSY_VALUE_REJECTION</a></li> <li><a href="#errors_err_fs_file_too_large">ERR_FS_FILE_TOO_LARGE</a></li> <li><a href="#errors_err_fs_invalid_symlink_type">ERR_FS_INVALID_SYMLINK_TYPE</a></li> <li><a href="#errors_err_http_headers_sent">ERR_HTTP_HEADERS_SENT</a></li> <li><a href="#errors_err_http_invalid_header_value">ERR_HTTP_INVALID_HEADER_VALUE</a></li> <li><a href="#errors_err_http_invalid_status_code">ERR_HTTP_INVALID_STATUS_CODE</a></li> <li><a href="#errors_err_http_trailer_invalid">ERR_HTTP_TRAILER_INVALID</a></li> <li><a href="#errors_err_http2_altsvc_invalid_origin">ERR_HTTP2_ALTSVC_INVALID_ORIGIN</a></li> <li><a href="#errors_err_http2_altsvc_length">ERR_HTTP2_ALTSVC_LENGTH</a></li> <li><a href="#errors_err_http2_connect_authority">ERR_HTTP2_CONNECT_AUTHORITY</a></li> <li><a href="#errors_err_http2_connect_path">ERR_HTTP2_CONNECT_PATH</a></li> <li><a href="#errors_err_http2_connect_scheme">ERR_HTTP2_CONNECT_SCHEME</a></li> <li><a href="#errors_err_http2_error">ERR_HTTP2_ERROR</a></li> <li><a href="#errors_err_http2_goaway_session">ERR_HTTP2_GOAWAY_SESSION</a></li> <li><a href="#errors_err_http2_headers_after_respond">ERR_HTTP2_HEADERS_AFTER_RESPOND</a></li> <li><a href="#errors_err_http2_headers_sent">ERR_HTTP2_HEADERS_SENT</a></li> <li><a href="#errors_err_http2_header_single_value">ERR_HTTP2_HEADER_SINGLE_VALUE</a></li> <li><a href="#errors_err_http2_info_status_not_allowed">ERR_HTTP2_INFO_STATUS_NOT_ALLOWED</a></li> <li><a href="#errors_err_http2_invalid_connection_headers">ERR_HTTP2_INVALID_CONNECTION_HEADERS</a></li> <li><a href="#errors_err_http2_invalid_header_value">ERR_HTTP2_INVALID_HEADER_VALUE</a></li> <li><a href="#errors_err_http2_invalid_info_status">ERR_HTTP2_INVALID_INFO_STATUS</a></li> <li><a href="#errors_err_http2_invalid_origin">ERR_HTTP2_INVALID_ORIGIN</a></li> <li><a href="#errors_err_http2_invalid_packed_settings_length">ERR_HTTP2_INVALID_PACKED_SETTINGS_LENGTH</a></li> <li><a href="#errors_err_http2_invalid_pseudoheader">ERR_HTTP2_INVALID_PSEUDOHEADER</a></li> <li><a href="#errors_err_http2_invalid_session">ERR_HTTP2_INVALID_SESSION</a></li> <li><a href="#errors_err_http2_invalid_setting_value">ERR_HTTP2_INVALID_SETTING_VALUE</a></li> <li><a href="#errors_err_http2_invalid_stream">ERR_HTTP2_INVALID_STREAM</a></li> <li><a href="#errors_err_http2_max_pending_settings_ack">ERR_HTTP2_MAX_PENDING_SETTINGS_ACK</a></li> <li><a href="#errors_err_http2_nested_push">ERR_HTTP2_NESTED_PUSH</a></li> <li><a href="#errors_err_http2_no_socket_manipulation">ERR_HTTP2_NO_SOCKET_MANIPULATION</a></li> <li><a href="#errors_err_http2_origin_length">ERR_HTTP2_ORIGIN_LENGTH</a></li> <li><a href="#errors_err_http2_out_of_streams">ERR_HTTP2_OUT_OF_STREAMS</a></li> <li><a href="#errors_err_http2_payload_forbidden">ERR_HTTP2_PAYLOAD_FORBIDDEN</a></li> <li><a href="#errors_err_http2_ping_cancel">ERR_HTTP2_PING_CANCEL</a></li> <li><a href="#errors_err_http2_ping_length">ERR_HTTP2_PING_LENGTH</a></li> <li><a href="#errors_err_http2_pseudoheader_not_allowed">ERR_HTTP2_PSEUDOHEADER_NOT_ALLOWED</a></li> <li><a href="#errors_err_http2_push_disabled">ERR_HTTP2_PUSH_DISABLED</a></li> <li><a href="#errors_err_http2_send_file">ERR_HTTP2_SEND_FILE</a></li> <li><a href="#errors_err_http2_send_file_noseek">ERR_HTTP2_SEND_FILE_NOSEEK</a></li> <li><a href="#errors_err_http2_session_error">ERR_HTTP2_SESSION_ERROR</a></li> <li><a href="#errors_err_http2_settings_cancel">ERR_HTTP2_SETTINGS_CANCEL</a></li> <li><a href="#errors_err_http2_socket_bound">ERR_HTTP2_SOCKET_BOUND</a></li> <li><a href="#errors_err_http2_socket_unbound">ERR_HTTP2_SOCKET_UNBOUND</a></li> <li><a href="#errors_err_http2_status_101">ERR_HTTP2_STATUS_101</a></li> <li><a href="#errors_err_http2_status_invalid">ERR_HTTP2_STATUS_INVALID</a></li> <li><a href="#errors_err_http2_stream_cancel">ERR_HTTP2_STREAM_CANCEL</a></li> <li><a href="#errors_err_http2_stream_error">ERR_HTTP2_STREAM_ERROR</a></li> <li><a href="#errors_err_http2_stream_self_dependency">ERR_HTTP2_STREAM_SELF_DEPENDENCY</a></li> <li><a href="#errors_err_http2_trailers_already_sent">ERR_HTTP2_TRAILERS_ALREADY_SENT</a></li> <li><a href="#errors_err_http2_trailers_not_ready">ERR_HTTP2_TRAILERS_NOT_READY</a></li> <li><a href="#errors_err_http2_unsupported_protocol">ERR_HTTP2_UNSUPPORTED_PROTOCOL</a></li> <li><a href="#errors_err_internal_assertion">ERR_INTERNAL_ASSERTION</a></li> <li><a href="#errors_err_incompatible_option_pair">ERR_INCOMPATIBLE_OPTION_PAIR</a></li> <li><a href="#errors_err_input_type_not_allowed">ERR_INPUT_TYPE_NOT_ALLOWED</a></li> <li><a href="#errors_err_inspector_already_connected">ERR_INSPECTOR_ALREADY_CONNECTED</a></li> <li><a href="#errors_err_inspector_closed">ERR_INSPECTOR_CLOSED</a></li> <li><a href="#errors_err_inspector_command">ERR_INSPECTOR_COMMAND</a></li> <li><a href="#errors_err_inspector_not_active">ERR_INSPECTOR_NOT_ACTIVE</a></li> <li><a href="#errors_err_inspector_not_available">ERR_INSPECTOR_NOT_AVAILABLE</a></li> <li><a href="#errors_err_inspector_not_connected">ERR_INSPECTOR_NOT_CONNECTED</a></li> <li><a href="#errors_err_invalid_address_family">ERR_INVALID_ADDRESS_FAMILY</a></li> <li><a href="#errors_err_invalid_arg_type">ERR_INVALID_ARG_TYPE</a></li> <li><a href="#errors_err_invalid_arg_value">ERR_INVALID_ARG_VALUE</a></li> <li><a href="#errors_err_invalid_async_id">ERR_INVALID_ASYNC_ID</a></li> <li><a href="#errors_err_invalid_buffer_size">ERR_INVALID_BUFFER_SIZE</a></li> <li><a href="#errors_err_invalid_callback">ERR_INVALID_CALLBACK</a></li> <li><a href="#errors_err_invalid_char">ERR_INVALID_CHAR</a></li> <li><a href="#errors_err_invalid_cursor_pos">ERR_INVALID_CURSOR_POS</a></li> <li><a href="#errors_err_invalid_fd">ERR_INVALID_FD</a></li> <li><a href="#errors_err_invalid_fd_type">ERR_INVALID_FD_TYPE</a></li> <li><a href="#errors_err_invalid_file_url_host">ERR_INVALID_FILE_URL_HOST</a></li> <li><a href="#errors_err_invalid_file_url_path">ERR_INVALID_FILE_URL_PATH</a></li> <li><a href="#errors_err_invalid_handle_type">ERR_INVALID_HANDLE_TYPE</a></li> <li><a href="#errors_err_invalid_http_token">ERR_INVALID_HTTP_TOKEN</a></li> <li><a href="#errors_err_invalid_ip_address">ERR_INVALID_IP_ADDRESS</a></li> <li><a href="#errors_err_invalid_opt_value">ERR_INVALID_OPT_VALUE</a></li> <li><a href="#errors_err_invalid_opt_value_encoding">ERR_INVALID_OPT_VALUE_ENCODING</a></li> <li><a href="#errors_err_invalid_package_config">ERR_INVALID_PACKAGE_CONFIG</a></li> <li><a href="#errors_err_invalid_performance_mark">ERR_INVALID_PERFORMANCE_MARK</a></li> <li><a href="#errors_err_invalid_protocol">ERR_INVALID_PROTOCOL</a></li> <li><a href="#errors_err_invalid_repl_eval_config">ERR_INVALID_REPL_EVAL_CONFIG</a></li> <li><a href="#errors_err_invalid_repl_input">ERR_INVALID_REPL_INPUT</a></li> <li><a href="#errors_err_invalid_return_property">ERR_INVALID_RETURN_PROPERTY</a></li> <li><a href="#errors_err_invalid_return_property_value">ERR_INVALID_RETURN_PROPERTY_VALUE</a></li> <li><a href="#errors_err_invalid_return_value">ERR_INVALID_RETURN_VALUE</a></li> <li><a href="#errors_err_invalid_sync_fork_input">ERR_INVALID_SYNC_FORK_INPUT</a></li> <li><a href="#errors_err_invalid_this">ERR_INVALID_THIS</a></li> <li><a href="#errors_err_invalid_transfer_object">ERR_INVALID_TRANSFER_OBJECT</a></li> <li><a href="#errors_err_invalid_tuple">ERR_INVALID_TUPLE</a></li> <li><a href="#errors_err_invalid_uri">ERR_INVALID_URI</a></li> <li><a href="#errors_err_invalid_url">ERR_INVALID_URL</a></li> <li><a href="#errors_err_invalid_url_scheme">ERR_INVALID_URL_SCHEME</a></li> <li><a href="#errors_err_ipc_channel_closed">ERR_IPC_CHANNEL_CLOSED</a></li> <li><a href="#errors_err_ipc_disconnected">ERR_IPC_DISCONNECTED</a></li> <li><a href="#errors_err_ipc_one_pipe">ERR_IPC_ONE_PIPE</a></li> <li><a href="#errors_err_ipc_sync_fork">ERR_IPC_SYNC_FORK</a></li> <li><a href="#errors_err_manifest_assert_integrity">ERR_MANIFEST_ASSERT_INTEGRITY</a></li> <li><a href="#errors_err_manifest_dependency_missing">ERR_MANIFEST_DEPENDENCY_MISSING</a></li> <li><a href="#errors_err_manifest_integrity_mismatch">ERR_MANIFEST_INTEGRITY_MISMATCH</a></li> <li><a href="#errors_err_manifest_invalid_resource_field">ERR_MANIFEST_INVALID_RESOURCE_FIELD</a></li> <li><a href="#errors_err_manifest_parse_policy">ERR_MANIFEST_PARSE_POLICY</a></li> <li><a href="#errors_err_manifest_tdz">ERR_MANIFEST_TDZ</a></li> <li><a href="#errors_err_manifest_unknown_onerror">ERR_MANIFEST_UNKNOWN_ONERROR</a></li> <li><a href="#errors_err_memory_allocation_failed">ERR_MEMORY_ALLOCATION_FAILED</a></li> <li><a href="#errors_err_method_not_implemented">ERR_METHOD_NOT_IMPLEMENTED</a></li> <li><a href="#errors_err_missing_args">ERR_MISSING_ARGS</a></li> <li><a href="#errors_err_missing_dynamic_instantiate_hook">ERR_MISSING_DYNAMIC_INSTANTIATE_HOOK</a></li> <li><a href="#errors_err_missing_message_port_in_transfer_list">ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST</a></li> <li><a href="#errors_err_missing_passphrase">ERR_MISSING_PASSPHRASE</a></li> <li><a href="#errors_err_missing_platform_for_worker">ERR_MISSING_PLATFORM_FOR_WORKER</a></li> <li><a href="#errors_err_module_not_found">ERR_MODULE_NOT_FOUND</a></li> <li><a href="#errors_err_multiple_callback">ERR_MULTIPLE_CALLBACK</a></li> <li><a href="#errors_err_napi_cons_function">ERR_NAPI_CONS_FUNCTION</a></li> <li><a href="#errors_err_napi_invalid_dataview_args">ERR_NAPI_INVALID_DATAVIEW_ARGS</a></li> <li><a href="#errors_err_napi_invalid_typedarray_alignment">ERR_NAPI_INVALID_TYPEDARRAY_ALIGNMENT</a></li> <li><a href="#errors_err_napi_invalid_typedarray_length">ERR_NAPI_INVALID_TYPEDARRAY_LENGTH</a></li> <li><a href="#errors_err_napi_tsfn_call_js">ERR_NAPI_TSFN_CALL_JS</a></li> <li><a href="#errors_err_napi_tsfn_get_undefined">ERR_NAPI_TSFN_GET_UNDEFINED</a></li> <li><a href="#errors_err_napi_tsfn_start_idle_loop">ERR_NAPI_TSFN_START_IDLE_LOOP</a></li> <li><a href="#errors_err_napi_tsfn_stop_idle_loop">ERR_NAPI_TSFN_STOP_IDLE_LOOP</a></li> <li><a href="#errors_err_no_crypto">ERR_NO_CRYPTO</a></li> <li><a href="#errors_err_no_icu">ERR_NO_ICU</a></li> <li><a href="#errors_err_out_of_range">ERR_OUT_OF_RANGE</a></li> <li><a href="#errors_err_require_esm">ERR_REQUIRE_ESM</a></li> <li><a href="#errors_err_script_execution_interrupted">ERR_SCRIPT_EXECUTION_INTERRUPTED</a></li> <li><a href="#errors_err_script_execution_timeout">ERR_SCRIPT_EXECUTION_TIMEOUT</a></li> <li><a href="#errors_err_server_already_listen">ERR_SERVER_ALREADY_LISTEN</a></li> <li><a href="#errors_err_server_not_running">ERR_SERVER_NOT_RUNNING</a></li> <li><a href="#errors_err_socket_already_bound">ERR_SOCKET_ALREADY_BOUND</a></li> <li><a href="#errors_err_socket_bad_buffer_size">ERR_SOCKET_BAD_BUFFER_SIZE</a></li> <li><a href="#errors_err_socket_bad_port">ERR_SOCKET_BAD_PORT</a></li> <li><a href="#errors_err_socket_bad_type">ERR_SOCKET_BAD_TYPE</a></li> <li><a href="#errors_err_socket_buffer_size">ERR_SOCKET_BUFFER_SIZE</a></li> <li><a href="#errors_err_socket_cannot_send">ERR_SOCKET_CANNOT_SEND</a></li> <li><a href="#errors_err_socket_closed">ERR_SOCKET_CLOSED</a></li> <li><a href="#errors_err_socket_dgram_is_connected">ERR_SOCKET_DGRAM_IS_CONNECTED</a></li> <li><a href="#errors_err_socket_dgram_not_connected">ERR_SOCKET_DGRAM_NOT_CONNECTED</a></li> <li><a href="#errors_err_socket_dgram_not_running">ERR_SOCKET_DGRAM_NOT_RUNNING</a></li> <li><a href="#errors_err_sri_parse">ERR_SRI_PARSE</a></li> <li><a href="#errors_err_stream_cannot_pipe">ERR_STREAM_CANNOT_PIPE</a></li> <li><a href="#errors_err_stream_destroyed">ERR_STREAM_DESTROYED</a></li> <li><a href="#errors_err_stream_null_values">ERR_STREAM_NULL_VALUES</a></li> <li><a href="#errors_err_stream_premature_close">ERR_STREAM_PREMATURE_CLOSE</a></li> <li><a href="#errors_err_stream_push_after_eof">ERR_STREAM_PUSH_AFTER_EOF</a></li> <li><a href="#errors_err_stream_unshift_after_end_event">ERR_STREAM_UNSHIFT_AFTER_END_EVENT</a></li> <li><a href="#errors_err_stream_wrap">ERR_STREAM_WRAP</a></li> <li><a href="#errors_err_stream_write_after_end">ERR_STREAM_WRITE_AFTER_END</a></li> <li><a href="#errors_err_string_too_long">ERR_STRING_TOO_LONG</a></li> <li><a href="#errors_err_synthetic">ERR_SYNTHETIC</a></li> <li><a href="#errors_err_system_error">ERR_SYSTEM_ERROR</a></li> <li><a href="#errors_err_tls_cert_altname_invalid">ERR_TLS_CERT_ALTNAME_INVALID</a></li> <li><a href="#errors_err_tls_dh_param_size">ERR_TLS_DH_PARAM_SIZE</a></li> <li><a href="#errors_err_tls_handshake_timeout">ERR_TLS_HANDSHAKE_TIMEOUT</a></li> <li><a href="#errors_err_tls_invalid_protocol_method">ERR_TLS_INVALID_PROTOCOL_METHOD</a></li> <li><a href="#errors_err_tls_invalid_protocol_version">ERR_TLS_INVALID_PROTOCOL_VERSION</a></li> <li><a href="#errors_err_tls_protocol_version_conflict">ERR_TLS_PROTOCOL_VERSION_CONFLICT</a></li> <li><a href="#errors_err_tls_renegotiation_disabled">ERR_TLS_RENEGOTIATION_DISABLED</a></li> <li><a href="#errors_err_tls_required_server_name">ERR_TLS_REQUIRED_SERVER_NAME</a></li> <li><a href="#errors_err_tls_session_attack">ERR_TLS_SESSION_ATTACK</a></li> <li><a href="#errors_err_tls_sni_from_server">ERR_TLS_SNI_FROM_SERVER</a></li> <li><a href="#errors_err_trace_events_category_required">ERR_TRACE_EVENTS_CATEGORY_REQUIRED</a></li> <li><a href="#errors_err_trace_events_unavailable">ERR_TRACE_EVENTS_UNAVAILABLE</a></li> <li><a href="#errors_err_transferring_externalized_sharedarraybuffer">ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER</a></li> <li><a href="#errors_err_transform_already_transforming">ERR_TRANSFORM_ALREADY_TRANSFORMING</a></li> <li><a href="#errors_err_transform_with_length_0">ERR_TRANSFORM_WITH_LENGTH_0</a></li> <li><a href="#errors_err_tty_init_failed">ERR_TTY_INIT_FAILED</a></li> <li><a href="#errors_err_uncaught_exception_capture_already_set">ERR_UNCAUGHT_EXCEPTION_CAPTURE_ALREADY_SET</a></li> <li><a href="#errors_err_unescaped_characters">ERR_UNESCAPED_CHARACTERS</a></li> <li><a href="#errors_err_unhandled_error">ERR_UNHANDLED_ERROR</a></li> <li><a href="#errors_err_unknown_builtin_module">ERR_UNKNOWN_BUILTIN_MODULE</a></li> <li><a href="#errors_err_unknown_credential">ERR_UNKNOWN_CREDENTIAL</a></li> <li><a href="#errors_err_unknown_encoding">ERR_UNKNOWN_ENCODING</a></li> <li><a href="#errors_err_unknown_file_extension">ERR_UNKNOWN_FILE_EXTENSION</a></li> <li><a href="#errors_err_unknown_module_format">ERR_UNKNOWN_MODULE_FORMAT</a></li> <li><a href="#errors_err_unknown_signal">ERR_UNKNOWN_SIGNAL</a></li> <li><a href="#errors_err_v8breakiterator">ERR_V8BREAKITERATOR</a></li> <li><a href="#errors_err_valid_performance_entry_type">ERR_VALID_PERFORMANCE_ENTRY_TYPE</a></li> <li><a href="#errors_err_vm_dynamic_import_callback_missing">ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING</a></li> <li><a href="#errors_err_vm_module_already_linked">ERR_VM_MODULE_ALREADY_LINKED</a></li> <li><a href="#errors_err_vm_module_different_context">ERR_VM_MODULE_DIFFERENT_CONTEXT</a></li> <li><a href="#errors_err_vm_module_linking_errored">ERR_VM_MODULE_LINKING_ERRORED</a></li> <li><a href="#errors_err_vm_module_not_linked">ERR_VM_MODULE_NOT_LINKED</a></li> <li><a href="#errors_err_vm_module_not_module">ERR_VM_MODULE_NOT_MODULE</a></li> <li><a href="#errors_err_vm_module_status">ERR_VM_MODULE_STATUS</a></li> <li><a href="#errors_err_worker_invalid_exec_argv">ERR_WORKER_INVALID_EXEC_ARGV</a></li> <li><a href="#errors_err_worker_path">ERR_WORKER_PATH</a></li> <li><a href="#errors_err_worker_unserializable_error">ERR_WORKER_UNSERIALIZABLE_ERROR</a></li> <li><a href="#errors_err_worker_unsupported_extension">ERR_WORKER_UNSUPPORTED_EXTENSION</a></li> <li><a href="#errors_err_worker_unsupported_operation">ERR_WORKER_UNSUPPORTED_OPERATION</a></li> <li><a href="#errors_err_zlib_initialization_failed">ERR_ZLIB_INITIALIZATION_FAILED</a></li> <li><a href="#errors_hpe_header_overflow">HPE_HEADER_OVERFLOW</a></li> <li><a href="#errors_module_not_found">MODULE_NOT_FOUND</a></li> </ul> </li> <li> <p><a href="#errors_legacy_node_js_error_codes">Legacy Node.js Error Codes</a></p> <ul> <li><a href="#errors_err_cannot_transfer_object">ERR_CANNOT_TRANSFER_OBJECT</a></li> <li><a href="#errors_err_closed_message_port">ERR_CLOSED_MESSAGE_PORT</a></li> <li><a href="#errors_err_http2_frame_error">ERR_HTTP2_FRAME_ERROR</a></li> <li><a href="#errors_err_http2_headers_object">ERR_HTTP2_HEADERS_OBJECT</a></li> <li><a href="#errors_err_http2_header_required">ERR_HTTP2_HEADER_REQUIRED</a></li> <li><a href="#errors_err_http2_info_headers_after_respond">ERR_HTTP2_INFO_HEADERS_AFTER_RESPOND</a></li> <li><a href="#errors_err_http2_stream_closed">ERR_HTTP2_STREAM_CLOSED</a></li> <li><a href="#errors_err_http_invalid_char">ERR_HTTP_INVALID_CHAR</a></li> <li><a href="#errors_err_index_out_of_range">ERR_INDEX_OUT_OF_RANGE</a></li> <li><a href="#errors_err_napi_cons_prototype_object">ERR_NAPI_CONS_PROTOTYPE_OBJECT</a></li> <li><a href="#errors_err_no_longer_supported">ERR_NO_LONGER_SUPPORTED</a></li> <li><a href="#errors_err_outofmemory">ERR_OUTOFMEMORY</a></li> <li><a href="#errors_err_parse_history_data">ERR_PARSE_HISTORY_DATA</a></li> <li><a href="#errors_err_stderr_close">ERR_STDERR_CLOSE</a></li> <li><a href="#errors_err_stdout_close">ERR_STDOUT_CLOSE</a></li> <li><a href="#errors_err_stream_read_not_implemented">ERR_STREAM_READ_NOT_IMPLEMENTED</a></li> <li><a href="#errors_err_tls_renegotiation_failed">ERR_TLS_RENEGOTIATION_FAILED</a></li> <li><a href="#errors_err_unknown_builtin_module_1">ERR_UNKNOWN_BUILTIN_MODULE</a></li> <li><a href="#errors_err_unknown_stdin_type">ERR_UNKNOWN_STDIN_TYPE</a></li> <li><a href="#errors_err_unknown_stream_type">ERR_UNKNOWN_STREAM_TYPE</a></li> <li><a href="#errors_err_value_out_of_range">ERR_VALUE_OUT_OF_RANGE</a></li> <li><a href="#errors_err_zlib_binding_closed">ERR_ZLIB_BINDING_CLOSED</a></li> <li> <p><a href="#errors_other_error_codes">Other error codes</a></p> <ul> <li><a href="#errors_err_entry_type_mismatch">ERR_ENTRY_TYPE_MISMATCH</a></li> <li><a href="#errors_err_fs_watcher_already_started">ERR_FS_WATCHER_ALREADY_STARTED</a></li> <li><a href="#errors_err_fs_watcher_not_started">ERR_FS_WATCHER_NOT_STARTED</a></li> <li><a href="#errors_err_http2_already_shutdown">ERR_HTTP2_ALREADY_SHUTDOWN</a></li> <li><a href="#errors_err_http2_error_1">ERR_HTTP2_ERROR</a></li> <li><a href="#errors_err_invalid_repl_history">ERR_INVALID_REPL_HISTORY</a></li> <li><a href="#errors_err_invalid_repl_type">ERR_INVALID_REPL_TYPE</a></li> <li><a href="#errors_err_missing_dynamic_instantiate_hook_1">ERR_MISSING_DYNAMIC_INSTANTIATE_HOOK</a></li> <li><a href="#errors_err_stream_has_stringdecoder">ERR_STREAM_HAS_STRINGDECODER</a></li> <li><a href="#errors_err_string_too_large">ERR_STRING_TOO_LARGE</a></li> <li><a href="#errors_err_tty_writable_not_readable">ERR_TTY_WRITABLE_NOT_READABLE</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </div> <div id="apicontent"> <h1>Errors<span><a class="mark" href="#errors_errors" id="errors_errors">#</a></span></h1> <p>Applications running in Node.js will generally experience four categories of errors:</p> <ul> <li>Standard JavaScript errors such as <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/EvalError" class="type"><EvalError></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError" class="type"><SyntaxError></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RangeError" class="type"><RangeError></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError" class="type"><ReferenceError></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypeError" class="type"><TypeError></a>, and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/URIError" class="type"><URIError></a>.</li> <li>System errors triggered by underlying operating system constraints such as attempting to open a file that does not exist or attempting to send data over a closed socket.</li> <li>User-specified errors triggered by application code.</li> <li><code>AssertionError</code>s are a special class of error that can be triggered when Node.js detects an exceptional logic violation that should never occur. These are raised typically by the <code>assert</code> module.</li> </ul> <p>All JavaScript and System errors raised by Node.js inherit from, or are instances of, the standard JavaScript <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type"><Error></a> class and are guaranteed to provide <em>at least</em> the properties available on that class.</p> <h2>Error Propagation and Interception<span><a class="mark" href="#errors_error_propagation_and_interception" id="errors_error_propagation_and_interception">#</a></span></h2> <p>Node.js supports several mechanisms for propagating and handling errors that occur while an application is running. How these errors are reported and handled depends entirely on the type of <code>Error</code> and the style of the API that is called.</p> <p>All JavaScript errors are handled as exceptions that <em>immediately</em> generate and throw an error using the standard JavaScript <code>throw</code> mechanism. These are handled using the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/try...catch"><code>try…catch</code> construct</a> provided by the JavaScript language.</p> <pre><code class="language-js">// Throws with a ReferenceError because z is not defined. try { const m