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<li><a href="#modules-module-api">Modules: <code>module</code> API</a>
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<li><a href="#the-module-object">The <code>Module</code> object</a>
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      <details id="toc" open><summary>Table of contents</summary><ul>
<li><a href="#modules-module-api">Modules: <code>module</code> API</a>
<ul>
<li><a href="#the-module-object">The <code>Module</code> object</a>
<ul>
<li><a href="#modulebuiltinmodules"><code>module.builtinModules</code></a></li>
<li><a href="#modulecreaterequirefilename"><code>module.createRequire(filename)</code></a></li>
<li><a href="#modulesyncbuiltinesmexports"><code>module.syncBuiltinESMExports()</code></a></li>
</ul>
</li>
<li><span class="stability_1"><a href="#source-map-v3-support">Source map v3 support</a></span>
<ul>
<li><a href="#modulefindsourcemappath"><code>module.findSourceMap(path)</code></a></li>
<li><a href="#class-modulesourcemap">Class: <code>module.SourceMap</code></a>
<ul>
<li><a href="#new-sourcemappayload"><code>new SourceMap(payload)</code></a></li>
<li><a href="#sourcemappayload"><code>sourceMap.payload</code></a></li>
<li><a href="#sourcemapfindentrylinenumber-columnnumber"><code>sourceMap.findEntry(lineNumber, columnNumber)</code></a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul></details>

      <div id="apicontent">
        <h2>Modules: <code>module</code> API<span><a class="mark" href="#modules-module-api" id="modules-module-api">#</a></span><a aria-hidden="true" class="legacy" id="module_modules_module_api"></a></h2>

<div class="api_metadata">
<span>Added in: v0.3.7</span>
</div>
<section><h3>The <code>Module</code> object<span><a class="mark" href="#the-module-object" id="the-module-object">#</a></span><a aria-hidden="true" class="legacy" id="module_the_module_object"></a></h3>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&#x3C;Object></a></li>
</ul>
<p>Provides general utility methods when interacting with instances of
<code>Module</code>, the <a href="modules.html#the-module-object"><code>module</code></a> variable often seen in <a href="modules.html">CommonJS</a> modules. Accessed
via <code>import 'module'</code> or <code>require('module')</code>.</p>
<h4><code>module.builtinModules</code><span><a class="mark" href="#modulebuiltinmodules" id="modulebuiltinmodules">#</a></span><a aria-hidden="true" class="legacy" id="module_module_builtinmodules"></a></h4>
<div class="api_metadata">
<span>Added in: v9.3.0, v8.10.0, v6.13.0</span>
</div>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string[]></a></li>
</ul>
<p>A list of the names of all modules provided by Node.js. Can be used to verify
if a module is maintained by a third party or not.</p>
<p><code>module</code> in this context isn't the same object that's provided
by the <a href="modules.html#the-module-wrapper">module wrapper</a>. To access it, require the <code>Module</code> module:</p>

<pre><input class="js-flavor-selector" type="checkbox" checked aria-label="Show modern ES modules syntax"><code class="language-js mjs"><span class="hljs-comment">// module.mjs</span>
<span class="hljs-comment">// In an ECMAScript module</span>
<span class="hljs-keyword">import</span> { builtinModules <span class="hljs-keyword">as</span> builtin } <span class="hljs-keyword">from</span> <span class="hljs-string">'module'</span>;</code><code class="language-js cjs"><span class="hljs-comment">// module.cjs</span>
<span class="hljs-comment">// In a CommonJS module</span>
<span class="hljs-keyword">const</span> builtin = <span class="hljs-built_in">require</span>(<span class="hljs-string">'module'</span>).<span class="hljs-property">builtinModules</span>;</code></pre>
<h4><code>module.createRequire(filename)</code><span><a class="mark" href="#modulecreaterequirefilename" id="modulecreaterequirefilename">#</a></span><a aria-hidden="true" class="legacy" id="module_module_createrequire_filename"></a></h4>
<div class="api_metadata">
<span>Added in: v12.2.0</span>
</div>
<ul>
<li><code>filename</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a> | <a href="url.html#the-whatwg-url-api" class="type">&#x3C;URL></a> Filename to be used to construct the require
function. Must be a file URL object, file URL string, or absolute path
string.</li>
<li>Returns: <a href="modules.html#requireid" class="type">&#x3C;require></a> Require function</li>
</ul>
<pre><code class="language-js mjs"><span class="hljs-keyword">import</span> { createRequire } <span class="hljs-keyword">from</span> <span class="hljs-string">'module'</span>;
<span class="hljs-keyword">const</span> <span class="hljs-built_in">require</span> = <span class="hljs-title function_">createRequire</span>(<span class="hljs-keyword">import</span>.<span class="hljs-property">meta</span>.<span class="hljs-property">url</span>);

<span class="hljs-comment">// sibling-module.js is a CommonJS module.</span>
<span class="hljs-keyword">const</span> siblingModule = <span class="hljs-built_in">require</span>(<span class="hljs-string">'./sibling-module'</span>);</code></pre>
<h4><code>module.syncBuiltinESMExports()</code><span><a class="mark" href="#modulesyncbuiltinesmexports" id="modulesyncbuiltinesmexports">#</a></span><a aria-hidden="true" class="legacy" id="module_module_syncbuiltinesmexports"></a></h4>
<div class="api_metadata">
<span>Added in: v12.12.0</span>
</div>
<p>The <code>module.syncBuiltinESMExports()</code> method updates all the live bindings for
builtin <a href="esm.html">ES Modules</a> to match the properties of the <a href="modules.html">CommonJS</a> exports. It
does not add or remove exported names from the <a href="esm.html">ES Modules</a>.</p>
<pre><code class="language-js"><span class="hljs-keyword">const</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">'fs'</span>);
<span class="hljs-keyword">const</span> assert = <span class="hljs-built_in">require</span>(<span class="hljs-string">'assert'</span>);
<span class="hljs-keyword">const</span> { syncBuiltinESMExports } = <span class="hljs-built_in">require</span>(<span class="hljs-string">'module'</span>);

fs.<span class="hljs-property">readFile</span> = newAPI;

<span class="hljs-keyword">delete</span> fs.<span class="hljs-property">readFileSync</span>;

<span class="hljs-keyword">function</span> <span class="hljs-title function_">newAPI</span>(<span class="hljs-params"></span>) {
  <span class="hljs-comment">// ...</span>
}

fs.<span class="hljs-property">newAPI</span> = newAPI;

<span class="hljs-title function_">syncBuiltinESMExports</span>();

<span class="hljs-title function_">import</span>(<span class="hljs-string">'fs'</span>).<span class="hljs-title function_">then</span>(<span class="hljs-function">(<span class="hljs-params">esmFS</span>) =></span> {
  <span class="hljs-comment">// It syncs the existing readFile property with the new value</span>
  assert.<span class="hljs-title function_">strictEqual</span>(esmFS.<span class="hljs-property">readFile</span>, newAPI);
  <span class="hljs-comment">// readFileSync has been deleted from the required fs</span>
  assert.<span class="hljs-title function_">strictEqual</span>(<span class="hljs-string">'readFileSync'</span> <span class="hljs-keyword">in</span> fs, <span class="hljs-literal">false</span>);
  <span class="hljs-comment">// syncBuiltinESMExports() does not remove readFileSync from esmFS</span>
  assert.<span class="hljs-title function_">strictEqual</span>(<span class="hljs-string">'readFileSync'</span> <span class="hljs-keyword">in</span> esmFS, <span class="hljs-literal">true</span>);
  <span class="hljs-comment">// syncBuiltinESMExports() does not add names</span>
  assert.<span class="hljs-title function_">strictEqual</span>(esmFS.<span class="hljs-property">newAPI</span>, <span class="hljs-literal">undefined</span>);
});</code></pre>
</section><section><h3>Source map v3 support<span><a class="mark" href="#source-map-v3-support" id="source-map-v3-support">#</a></span><a aria-hidden="true" class="legacy" id="module_source_map_v3_support"></a></h3>
<div class="api_metadata">
<span>Added in: v13.7.0, v12.17.0</span>
</div>
<p></p><div class="api_stability api_stability_1"><a href="documentation.html#stability-index">Stability: 1</a> - Experimental</div><p></p>
<p>Helpers for interacting with the source map cache. This cache is
populated when source map parsing is enabled and
<a href="https://sourcemaps.info/spec.html#h.lmz475t4mvbx">source map include directives</a> are found in a modules' footer.</p>
<p>To enable source map parsing, Node.js must be run with the flag
<a href="cli.html#--enable-source-maps"><code>--enable-source-maps</code></a>, or with code coverage enabled by setting
<a href="cli.html#node_v8_coveragedir"><code>NODE_V8_COVERAGE=dir</code></a>.</p>

<pre><input class="js-flavor-selector" type="checkbox" checked aria-label="Show modern ES modules syntax"><code class="language-js mjs"><span class="hljs-comment">// module.mjs</span>
<span class="hljs-comment">// In an ECMAScript module</span>
<span class="hljs-keyword">import</span> { findSourceMap, <span class="hljs-title class_">SourceMap</span> } <span class="hljs-keyword">from</span> <span class="hljs-string">'module'</span>;</code><code class="language-js cjs"><span class="hljs-comment">// module.cjs</span>
<span class="hljs-comment">// In a CommonJS module</span>
<span class="hljs-keyword">const</span> { findSourceMap, <span class="hljs-title class_">SourceMap</span> } = <span class="hljs-built_in">require</span>(<span class="hljs-string">'module'</span>);</code></pre>
<!-- Anchors to make sure old links find a target -->
<p><a id="module_module_findsourcemap_path_error"></a></p>
<h4><code>module.findSourceMap(path)</code><span><a class="mark" href="#modulefindsourcemappath" id="modulefindsourcemappath">#</a></span><a aria-hidden="true" class="legacy" id="module_module_findsourcemap_path"></a></h4>
<div class="api_metadata">
<span>Added in: v13.7.0, v12.17.0</span>
</div>
<ul>
<li><code>path</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
<li>Returns: <a href="module.html#class-modulesourcemap" class="type">&#x3C;module.SourceMap></a></li>
</ul>
<p><code>path</code> is the resolved path for the file for which a corresponding source map
should be fetched.</p>
<h4>Class: <code>module.SourceMap</code><span><a class="mark" href="#class-modulesourcemap" id="class-modulesourcemap">#</a></span><a aria-hidden="true" class="legacy" id="module_class_module_sourcemap"></a></h4>
<div class="api_metadata">
<span>Added in: v13.7.0, v12.17.0</span>
</div>
<h5><code>new SourceMap(payload)</code><span><a class="mark" href="#new-sourcemappayload" id="new-sourcemappayload">#</a></span><a aria-hidden="true" class="legacy" id="module_new_sourcemap_payload"></a></h5>
<ul>
<li><code>payload</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&#x3C;Object></a></li>
</ul>
<p>Creates a new <code>sourceMap</code> instance.</p>
<p><code>payload</code> is an object with keys matching the <a href="https://sourcemaps.info/spec.html#h.mofvlxcwqzej">Source map v3 format</a>:</p>
<ul>
<li><code>file</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
<li><code>version</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li><code>sources</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string[]></a></li>
<li><code>sourcesContent</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string[]></a></li>
<li><code>names</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string[]></a></li>
<li><code>mappings</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
<li><code>sourceRoot</code>: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
</ul>
<h5><code>sourceMap.payload</code><span><a class="mark" href="#sourcemappayload" id="sourcemappayload">#</a></span><a aria-hidden="true" class="legacy" id="module_sourcemap_payload"></a></h5>
<ul>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&#x3C;Object></a></li>
</ul>
<p>Getter for the payload used to construct the <a href="#class-modulesourcemap"><code>SourceMap</code></a> instance.</p>
<h5><code>sourceMap.findEntry(lineNumber, columnNumber)</code><span><a class="mark" href="#sourcemapfindentrylinenumber-columnnumber" id="sourcemapfindentrylinenumber-columnnumber">#</a></span><a aria-hidden="true" class="legacy" id="module_sourcemap_findentry_linenumber_columnnumber"></a></h5>
<ul>
<li><code>lineNumber</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li><code>columnNumber</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li>Returns: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&#x3C;Object></a></li>
</ul>
<p>Given a line number and column number in the generated source file, returns
an object representing the position in the original file. The object returned
consists of the following keys:</p>
<ul>
<li>generatedLine: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li>generatedColumn: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li>originalSource: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
<li>originalLine: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li>originalColumn: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type" class="type">&#x3C;number></a></li>
<li>name: <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&#x3C;string></a></li>
</ul></section>
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