learnyounode

<!DOCTYPE html><html lang="en"><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>Inspector | 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/inspector.html"> </head> <body class="alt apidoc" id="api-section-inspector"> <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">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 active">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="inspector" 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/inspector.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/inspector.html">12.x</a></li> <li><a href="https://nodejs.org/docs/latest-v11.x/api/inspector.html">11.x</a></li> <li><a href="https://nodejs.org/docs/latest-v10.x/api/inspector.html">10.x <b>LTS</b></a></li> <li><a href="https://nodejs.org/docs/latest-v9.x/api/inspector.html">9.x</a></li> <li><a href="https://nodejs.org/docs/latest-v8.x/api/inspector.html">8.x <b>LTS</b></a></li></ol> </li> <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/inspector.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><span class="stability_1"><a href="#inspector_inspector">Inspector</a></span></p> <ul> <li><a href="#inspector_inspector_close">inspector.close()</a></li> <li><a href="#inspector_inspector_console">inspector.console</a></li> <li><a href="#inspector_inspector_open_port_host_wait">inspector.open([port[, host[, wait]]])</a></li> <li><a href="#inspector_inspector_url">inspector.url()</a></li> <li><a href="#inspector_inspector_waitfordebugger">inspector.waitForDebugger()</a></li> <li> <p><a href="#inspector_class_inspector_session">Class: inspector.Session</a></p> <ul> <li><a href="#inspector_constructor_new_inspector_session">Constructor: new inspector.Session()</a></li> <li><a href="#inspector_event_inspectornotification">Event: 'inspectorNotification'</a></li> <li><a href="#inspector_event_lt_inspector_protocol_method_gt">Event: <inspector-protocol-method></a></li> <li><a href="#inspector_session_connect">session.connect()</a></li> <li><a href="#inspector_session_disconnect">session.disconnect()</a></li> <li><a href="#inspector_session_post_method_params_callback">session.post(method[, params][, callback])</a></li> </ul> </li> <li> <p><a href="#inspector_example_usage">Example usage</a></p> <ul> <li><a href="#inspector_cpu_profiler">CPU Profiler</a></li> <li><a href="#inspector_heap_profiler">Heap Profiler</a></li> </ul> </li> </ul> </li> </ul> </div> <div id="apicontent"> <h1>Inspector<span><a class="mark" href="#inspector_inspector" id="inspector_inspector">#</a></span></h1> <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>The <code>inspector</code> module provides an API for interacting with the V8 inspector.</p> <p>It can be accessed using:</p> <pre><code class="language-js">const inspector = require('inspector'); </code></pre> <h2>inspector.close()<span><a class="mark" href="#inspector_inspector_close" id="inspector_inspector_close">#</a></span></h2> <p>Deactivate the inspector. Blocks until there are no active connections.</p> <h2>inspector.console<span><a class="mark" href="#inspector_inspector_console" id="inspector_inspector_console">#</a></span></h2> <ul> <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a> An object to send messages to the remote inspector console.</li> </ul> <pre><code class="language-js">require('inspector').console.log('a message'); </code></pre> <p>The inspector console does not have API parity with Node.js console.</p> <h2>inspector.open([port[, host[, wait]]])<span><a class="mark" href="#inspector_inspector_open_port_host_wait" id="inspector_inspector_open_port_host_wait">#</a></span></h2> <ul> <li><code>port</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type"><number></a> Port to listen on for inspector connections. Optional. <strong>Default:</strong> what was specified on the CLI.</li> <li><code>host</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> Host to listen on for inspector connections. Optional. <strong>Default:</strong> what was specified on the CLI.</li> <li><code>wait</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type"><boolean></a> Block until a client has connected. Optional. <strong>Default:</strong> <code>false</code>.</li> </ul> <p>Activate inspector on host and port. Equivalent to <code>node --inspect=[[host:]port]</code>, but can be done programmatically after node has started.</p> <p>If wait is <code>true</code>, will block until a client has connected to the inspect port and flow control has been passed to the debugger client.</p> <p>See the <a href="https://nodejs.org/api/cli.html#inspector_security">security warning</a> regarding the <code>host</code> parameter usage.</p> <h2>inspector.url()<span><a class="mark" href="#inspector_inspector_url" id="inspector_inspector_url">#</a></span></h2> <ul> <li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Undefined_type" class="type"><undefined></a></li> </ul> <p>Return the URL of the active inspector, or <code>undefined</code> if there is none.</p> <h2>inspector.waitForDebugger()<span><a class="mark" href="#inspector_inspector_waitfordebugger" id="inspector_inspector_waitfordebugger">#</a></span></h2> <div class="api_metadata"> <span>Added in: v12.7.0</span> </div> <p>Blocks until a client (existing or connected later) has sent <code>Runtime.runIfWaitingForDebugger</code> command.</p> <p>An exception will be thrown if there is no active inspector.</p> <h2>Class: inspector.Session<span><a class="mark" href="#inspector_class_inspector_session" id="inspector_class_inspector_session">#</a></span></h2> <ul> <li>Extends: <a href="https://nodejs.org/api/events.html#events_class_eventemitter" class="type"><EventEmitter></a></li> </ul> <p>The <code>inspector.Session</code> is used for dispatching messages to the V8 inspector back-end and receiving message responses and notifications.</p> <h3>Constructor: new inspector.Session()<span><a class="mark" href="#inspector_constructor_new_inspector_session" id="inspector_constructor_new_inspector_session">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <p>Create a new instance of the <code>inspector.Session</code> class. The inspector session needs to be connected through <a href="#inspector_session_connect"><code>session.connect()</code></a> before the messages can be dispatched to the inspector backend.</p> <h3>Event: 'inspectorNotification'<span><a class="mark" href="#inspector_event_inspectornotification" id="inspector_event_inspectornotification">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <ul> <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a> The notification message object</li> </ul> <p>Emitted when any notification from the V8 Inspector is received.</p> <pre><code class="language-js">session.on('inspectorNotification', (message) => console.log(message.method)); // Debugger.paused // Debugger.resumed </code></pre> <p>It is also possible to subscribe only to notifications with specific method:</p> <h3>Event: <inspector-protocol-method><span><a class="mark" href="#inspector_event_lt_inspector_protocol_method_gt" id="inspector_event_lt_inspector_protocol_method_gt">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <ul> <li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a> The notification message object</li> </ul> <p>Emitted when an inspector notification is received that has its method field set to the <code><inspector-protocol-method></code> value.</p> <p>The following snippet installs a listener on the <a href="https://chromedevtools.github.io/devtools-protocol/v8/Debugger#event-paused"><code>'Debugger.paused'</code></a> event, and prints the reason for program suspension whenever program execution is suspended (through breakpoints, for example):</p> <pre><code class="language-js">session.on('Debugger.paused', ({ params }) => { console.log(params.hitBreakpoints); }); // [ '/the/file/that/has/the/breakpoint.js:11:0' ] </code></pre> <h3>session.connect()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/inspector.js#L43">[src]</a><span><a class="mark" href="#inspector_session_connect" id="inspector_session_connect">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <p>Connects a session to the inspector back-end. An exception will be thrown if there is already a connected session established either through the API or by a front-end connected to the Inspector WebSocket port.</p> <h3>session.disconnect()<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/inspector.js#L100">[src]</a><span><a class="mark" href="#inspector_session_disconnect" id="inspector_session_disconnect">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <p>Immediately close the session. All pending message callbacks will be called with an error. <a href="#inspector_session_connect"><code>session.connect()</code></a> will need to be called to be able to send messages again. Reconnected session will lose all inspector state, such as enabled agents or configured breakpoints.</p> <h3>session.post(method[, params][, callback])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/inspector.js#L73">[src]</a><span><a class="mark" href="#inspector_session_post_method_params_callback" id="inspector_session_post_method_params_callback">#</a></span></h3> <div class="api_metadata"> <span>Added in: v8.0.0</span> </div> <ul> <li><code>method</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type"><string></a></li> <li><code>params</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type"><Object></a></li> <li><code>callback</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type"><Function></a></li> </ul> <p>Posts a message to the inspector back-end. <code>callback</code> will be notified when a response is received. <code>callback</code> is a function that accepts two optional arguments - error and message-specific result.</p> <pre><code class="language-js">session.post('Runtime.evaluate', { expression: '2 + 2' }, (error, { result }) => console.log(result)); // Output: { type: 'number', value: 4, description: '4' } </code></pre> <p>The latest version of the V8 inspector protocol is published on the <a href="https://chromedevtools.github.io/devtools-protocol/v8/">Chrome DevTools Protocol Viewer</a>.</p> <p>Node.js inspector supports all the Chrome DevTools Protocol domains declared by V8. Chrome DevTools Protocol domain provides an interface for interacting with one of the runtime agents used to inspect the application state and listen to the run-time events.</p> <h2>Example usage<span><a class="mark" href="#inspector_example_usage" id="inspector_example_usage">#</a></span></h2> <p>Apart from the debugger, various V8 Profilers are available through the DevTools protocol.</p> <h3>CPU Profiler<span><a class="mark" href="#inspector_cpu_profiler" id="inspector_cpu_profiler">#</a></span></h3> <p>Here's an example showing how to use the <a href="https://chromedevtools.github.io/devtools-protocol/v8/Profiler">CPU Profiler</a>:</p> <pre><code class="language-js">const inspector = require('inspector'); const fs = require('fs'); const session = new inspector.Session(); session.connect(); session.post('Profiler.enable', () => { session.post('Profiler.start', () => { // Invoke business logic under measurement here... // some time later... session.post('Profiler.stop', (err, { profile }) => { // Write profile to disk, upload, etc. if (!err) { fs.writeFileSync('./profile.cpuprofile', JSON.stringify(profile)); } }); }); }); </code></pre> <h3>Heap Profiler<span><a class="mark" href="#inspector_heap_profiler" id="inspector_heap_profiler">#</a></span></h3> <p>Here's an example showing how to use the <a href="https://chromedevtools.github.io/devtools-protocol/v8/HeapProfiler">Heap Profiler</a>:</p> <pre><code class="language-js">const inspector = require('inspector'); const fs = require('fs'); const session = new inspector.Session(); const fd = fs.openSync('profile.heapsnapshot', 'w'); session.connect(); session.on('HeapProfiler.addHeapSnapshotChunk', (m) => { fs.writeSync(fd, m.params.chunk); }); session.post('HeapProfiler.takeHeapSnapshot', null, (err, r) => { console.log('Runtime.takeHeapSnapshot done:', err, r); session.disconnect(); fs.closeSync(fd); }); </code></pre> </div> </div> </div> <script src="data:application/javascript;base64,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